Merge pull request #157 from boostorg/develop

Latest develop changes

.clang-tidy

@@ -0,0 +1,172 @@
+---
+# Enable ALL the things! Except not really
+# misc-non-private-member-variables-in-classes: the options don't do anything
+Checks: "*,\
+  -readability-*,\
+  -readability-identifier-length,\
+  -google-readability-todo,\
+  -google-readability-namespace-comments,\
+  -google-readability-braces-around-statements,\
+  -hicpp-braces-around-statements,\
+  -hicpp-named-parameter,\
+  -hicpp-avoid-goto,\
+  -google-build-using-namespace,\
+  -altera-*,\
+  -fuchsia-*,\
+  fuchsia-multiple-inheritance,\
+  -llvm-namespace-comment,\
+  -llvm-header-guard,\
+  -llvm-include-order,\
+  -llvmlibc-*,\
+  -misc-non-private-member-variables-in-classes,\
+  -bugprone-use-after-move,\
+  -hicpp-invalid-access-moved,\
+  -misc-no-recursion,\
+  -cppcoreguidelines-pro-bounds-pointer-arithmetic,\
+  -cppcoreguidelines-avoid-magic-numbers,\
+  -cppcoreguidelines-pro-bounds-constant-array-index,\
+  -cppcoreguidelines-interfaces-global-init,\
+  -cppcoreguidelines-macro-usage,\
+  -cppcoreguidelines-avoid-goto,\
+  -cppcoreguidelines-non-private-member-variables-in-classes"
+WarningsAsErrors: ''
+CheckOptions:
+  - key: 'bugprone-argument-comment.StrictMode'
+    value: 'true'
+# Prefer using enum classes with 2 values for parameters instead of bools
+  - key: 'bugprone-argument-comment.CommentBoolLiterals'
+    value: 'true'
+  - key: 'bugprone-misplaced-widening-cast.CheckImplicitCasts'
+    value: 'true'
+  - key: 'bugprone-sizeof-expression.WarnOnSizeOfIntegerExpression'
+    value: 'true'
+  - key: 'bugprone-suspicious-string-compare.WarnOnLogicalNotComparison'
+    value: 'true'
+  - key: 'readability-simplify-boolean-expr.ChainedConditionalReturn'
+    value: 'true'
+  - key: 'readability-simplify-boolean-expr.ChainedConditionalAssignment'
+    value: 'true'
+  - key: 'readability-uniqueptr-delete-release.PreferResetCall'
+    value: 'true'
+  - key: 'cppcoreguidelines-init-variables.MathHeader'
+    value: '<cmath>'
+  - key: 'cppcoreguidelines-narrowing-conversions.PedanticMode'
+    value: 'true'
+  - key: 'readability-else-after-return.WarnOnUnfixable'
+    value: 'true'
+  - key: 'readability-else-after-return.WarnOnConditionVariables'
+    value: 'true'
+  - key: 'readability-inconsistent-declaration-parameter-name.Strict'
+    value: 'true'
+  - key: 'readability-qualified-auto.AddConstToQualified'
+    value: 'true'
+  - key: 'readability-redundant-access-specifiers.CheckFirstDeclaration'
+    value: 'true'
+# These seem to be the most common identifier styles
+  - key: 'readability-identifier-naming.AbstractClassCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ClassCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ClassConstantCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ClassMemberCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ClassMethodCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ConstantCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ConstantMemberCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ConstantParameterCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ConstantPointerParameterCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ConstexprFunctionCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ConstexprMethodCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ConstexprVariableCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.EnumCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.EnumConstantCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.FunctionCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.GlobalConstantCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.GlobalConstantPointerCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.GlobalFunctionCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.GlobalPointerCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.GlobalVariableCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.InlineNamespaceCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.LocalConstantCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.LocalConstantPointerCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.LocalPointerCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.LocalVariableCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.MacroDefinitionCase'
+    value: 'UPPER_CASE'
+  - key: 'readability-identifier-naming.MemberCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.MethodCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.NamespaceCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ParameterCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ParameterPackCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.PointerParameterCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.PrivateMemberCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.PrivateMemberPrefix'
+    value: 'm_'
+  - key: 'readability-identifier-naming.PrivateMethodCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ProtectedMemberCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ProtectedMemberPrefix'
+    value: 'm_'
+  - key: 'readability-identifier-naming.ProtectedMethodCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.PublicMemberCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.PublicMethodCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ScopedEnumConstantCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.StaticConstantCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.StaticVariableCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.StructCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.TemplateParameterCase'
+    value: 'CamelCase'
+  - key: 'readability-identifier-naming.TemplateTemplateParameterCase'
+    value: 'CamelCase'
+  - key: 'readability-identifier-naming.TypeAliasCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.TypedefCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.TypeTemplateParameterCase'
+    value: 'CamelCase'
+  - key: 'readability-identifier-naming.UnionCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.ValueTemplateParameterCase'
+    value: 'CamelCase'
+  - key: 'readability-identifier-naming.VariableCase'
+    value: 'lower_case'
+  - key: 'readability-identifier-naming.VirtualMethodCase'
+    value: 'lower_case'
+...

.codecov.yml

@@ -0,0 +1,22 @@
+codecov:
+  max_report_age: off
+  require_ci_to_pass: yes
+  notify:
+    after_n_builds: 1
+    wait_for_ci: yes
+
+ignore:
+  - "benchmarks/cpp/asio/*"
+  - "example/*"
+  - "tests/*"
+  - "/usr/*"
+  - "**/boost/*"
+
+parsers:
+  gcov:
+    branch_detection:
+      conditional: no
+      loop: no
+      method: no
+      macro: no
+

.github/workflows/ci.yml

@@ -0,0 +1,230 @@
+# CI script to verify that CMake and B2 builds work.
+# B2 builds include only tests that don't require a DB server, to avoid race conditions.
+# CMake tests include the actual project tests and all the CMake integration workflows
+#   recommended by Boost.CI.
+# Windows CMake jobs build the code but don't run the tests,
+#   since we don't have a way to set up a Redis server on Windows (yet).
+# Subcommands are implemented by the tools/ci.py script in a platform-independent manner.
+
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  windows-cmake:
+    name: "CMake ${{matrix.toolset}} ${{matrix.build-type}} C++${{matrix.cxxstd}}"
+    runs-on: ${{matrix.os}}
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { toolset: msvc-14.2, os: windows-2019, generator: "Visual Studio 16 2019", cxxstd: '17', build-type: 'Debug',   build-shared-libs: 1 }
+          - { toolset: msvc-14.2, os: windows-2019, generator: "Visual Studio 16 2019", cxxstd: '17', build-type: 'Release', build-shared-libs: 0 }
+          - { toolset: msvc-14.3, os: windows-2022, generator: "Visual Studio 17 2022", cxxstd: '20', build-type: 'Debug',   build-shared-libs: 0 }
+          - { toolset: msvc-14.3, os: windows-2022, generator: "Visual Studio 17 2022", cxxstd: '20', build-type: 'Release', build-shared-libs: 1 }
+    env:
+      CMAKE_BUILD_PARALLEL_LEVEL: 4
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Setup Boost
+      run: python3 tools/ci.py setup-boost --source-dir=$(pwd)
+
+    - name: Build a Boost distribution using B2
+      run: |
+        python3 tools/ci.py build-b2-distro \
+          --toolset ${{ matrix.toolset }}
+
+    - name: Build a Boost distribution using CMake
+      run: |
+        python3 tools/ci.py build-cmake-distro \
+          --build-type ${{ matrix.build-type }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --toolset ${{ matrix.toolset }} \
+          --generator "${{ matrix.generator }}" \
+          --build-shared-libs ${{ matrix.build-shared-libs }}
+        
+    - name: Build the project tests
+      run: |
+        python3 tools/ci.py build-cmake-standalone-tests \
+          --build-type ${{ matrix.build-type }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --toolset ${{ matrix.toolset }} \
+          --generator "${{ matrix.generator }}" \
+          --build-shared-libs ${{ matrix.build-shared-libs }}
+
+    # # TODO: re-enable this when a Redis server is available for this job
+    # - name: Run the project tests
+    #   run: |
+    #     python3 tools/ci.py run-cmake-standalone-tests \
+    #       --build-type ${{ matrix.build-type }}
+
+    - name: Run add_subdirectory tests
+      run: |
+        python3 tools/ci.py run-cmake-add-subdirectory-tests \
+          --build-type ${{ matrix.build-type }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --toolset ${{ matrix.toolset }} \
+          --generator "${{ matrix.generator }}" \
+          --build-shared-libs ${{ matrix.build-shared-libs }}
+
+    - name: Run find_package tests with the built cmake distribution
+      run: |
+        python3 tools/ci.py run-cmake-find-package-tests \
+          --build-type ${{ matrix.build-type }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --toolset ${{ matrix.toolset }} \
+          --generator "${{ matrix.generator }}" \
+          --build-shared-libs ${{ matrix.build-shared-libs }}
+
+    - name: Run find_package tests with the built b2 distribution
+      run: |
+        python3 tools/ci.py run-cmake-b2-find-package-tests \
+          --build-type ${{ matrix.build-type }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --toolset ${{ matrix.toolset }} \
+          --generator "${{ matrix.generator }}" \
+          --build-shared-libs ${{ matrix.build-shared-libs }}
+
+  windows-b2:
+    name: "B2 ${{matrix.toolset}}"
+    runs-on: ${{matrix.os}}
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { toolset: msvc-14.2, os: windows-2019 }
+          - { toolset: msvc-14.3, os: windows-2022 }
+    env:
+      OPENSSL_ROOT: "C:\\Program Files\\OpenSSL"
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Setup user-config.jam
+      run: cp tools/user-config.jam "${HOMEDRIVE}${HOMEPATH}/"
+
+    - name: Setup Boost
+      run: python3 tools/ci.py setup-boost --source-dir=$(pwd)
+    
+    - name: Build and run project tests using B2
+      run: |
+        python3 tools/ci.py run-b2-tests \
+          --toolset ${{ matrix.toolset }} \
+          --cxxstd 17,20 \
+          --variant debug,release
+
+  posix-cmake:
+    name: "CMake ${{ matrix.toolset }} ${{ matrix.cxxstd }} ${{ matrix.build-type }} ${{ matrix.cxxflags }}"
+    defaults:
+      run:
+        shell: bash
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { toolset: gcc-11,   install: g++-11,   os: ubuntu-22.04, cxxstd: '17', build-type: 'Debug', ldflags: '' }
+          - { toolset: gcc-11,   install: g++-11,   os: ubuntu-22.04, cxxstd: '20', build-type: 'Release', ldflags: '' }
+          - { toolset: clang-11, install: clang-11, os: ubuntu-22.04, cxxstd: '17', build-type: 'Debug', ldflags: '' }
+          - { toolset: clang-11, install: clang-11, os: ubuntu-22.04, cxxstd: '20', build-type: 'Debug', ldflags: '' }
+          - { toolset: clang-13, install: clang-13, os: ubuntu-22.04, cxxstd: '17', build-type: 'Release', ldflags: '' }
+          - { toolset: clang-13, install: clang-13, os: ubuntu-22.04, cxxstd: '20', build-type: 'Release', ldflags: '' }
+          - { toolset: clang-14, install: 'clang-14 libc++-14-dev libc++abi-14-dev', os: ubuntu-22.04, cxxstd: '17', build-type: 'Debug', cxxflags: '-stdlib=libc++', ldflags: '-lc++' }
+          - { toolset: clang-14, install: 'clang-14 libc++-14-dev libc++abi-14-dev', os: ubuntu-22.04, cxxstd: '20', build-type: 'Release', cxxflags: '-stdlib=libc++', ldflags: '-lc++' }
+    runs-on: ${{ matrix.os }}
+    env:
+      CXXFLAGS: ${{matrix.cxxflags}} -Wall -Wextra
+      LDFLAGS:  ${{matrix.ldflags}}
+      CMAKE_BUILD_PARALLEL_LEVEL: 4
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Install dependencies
+      run: sudo apt-get -y install cmake protobuf-compiler redis-server python3 ${{ matrix.install }}
+
+    - name: Setup Boost
+      run: ./tools/ci.py setup-boost --source-dir=$(pwd)
+
+    - name: Build a Boost distribution using B2
+      run: |
+        ./tools/ci.py build-b2-distro \
+          --toolset ${{ matrix.toolset }}
+
+    - name: Build a Boost distribution using CMake
+      run: |
+        ./tools/ci.py build-cmake-distro \
+          --build-type ${{ matrix.build-type }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --toolset ${{ matrix.toolset }}
+
+    - name: Build the project tests
+      run: |
+        ./tools/ci.py build-cmake-standalone-tests \
+          --build-type ${{ matrix.build-type }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --toolset ${{ matrix.toolset }}
+  
+    - name: Run the project tests
+      run: |
+        ./tools/ci.py run-cmake-standalone-tests \
+          --build-type ${{ matrix.build-type }}
+
+    - name: Run add_subdirectory tests
+      run: |
+        ./tools/ci.py run-cmake-add-subdirectory-tests \
+          --build-type ${{ matrix.build-type }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --toolset ${{ matrix.toolset }}
+
+    - name: Run find_package tests with the built cmake distribution
+      run: |
+        ./tools/ci.py run-cmake-find-package-tests \
+          --build-type ${{ matrix.build-type }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --toolset ${{ matrix.toolset }}
+
+    - name: Run find_package tests with the built b2 distribution
+      run: |
+        ./tools/ci.py run-cmake-b2-find-package-tests \
+          --build-type ${{ matrix.build-type }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --toolset ${{ matrix.toolset }}
+
+  posix-b2:
+    name: "B2 ${{ matrix.toolset }}"
+    defaults:
+      run:
+        shell: bash
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { toolset: gcc-11,   install: g++-11,   cxxstd: "11,17,20" } # Having C++11 shouldn't break the build
+          - { toolset: clang-14, install: clang-14, cxxstd: "17,20" }
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Install dependencies
+      run: sudo apt-get -y install python3 ${{ matrix.install }}
+
+    - name: Setup Boost
+      run: ./tools/ci.py setup-boost --source-dir=$(pwd)
+    
+    - name: Build and run project tests using B2
+      run: |
+        python3 tools/ci.py run-b2-tests \
+          --toolset ${{ matrix.toolset }} \
+          --cxxstd ${{ matrix.cxxstd }} \
+          --variant debug,release

.github/workflows/coverage.yml

@@ -0,0 +1,51 @@
+name: Coverage
+
+on:
+  push:
+    branches:
+      - develop
+
+jobs:
+  posix:
+    defaults:
+      run:
+        shell: bash
+
+    runs-on: ubuntu-22.04
+    env:
+      CXX: g++-11
+      CXXFLAGS: -g -O0 -std=c++20 --coverage -fkeep-inline-functions -fkeep-static-functions
+      LDFLAGS: --coverage
+      CMAKE_BUILD_PARALLEL_LEVEL: 4
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Install dependencies
+      run: sudo apt-get --no-install-recommends -y install cmake lcov g++-11 redis-server python3 libgd-perl
+    
+    - name: Setup Boost
+      run: ./tools/ci.py setup-boost --source-dir=$(pwd)
+    
+    - name: Build Boost
+      run: ./tools/ci.py build-b2-distro --toolset=gcc-11
+    
+    # Having our library there confuses the coverage reports
+    - name: Remove Boost.Redis from the b2 distro
+      run: rm -rf ~/boost-b2-distro/include/boost/redis
+
+    - name: Run CMake
+      run: cmake -DCMAKE_PREFIX_PATH=$HOME/boost-b2-distro --preset coverage .
+
+    - name: Build
+      run: cmake --build --preset coverage
+
+    - name: Test
+      run: ctest --preset coverage
+
+    - name: Make the coverage file
+      run: cmake --build --preset coverage --target coverage
+
+    - name: Upload to codecov
+      run: |
+        bash <(curl -s https://codecov.io/bash) -f ./build/coverage/coverage.info

BUILD_STATUS.md

@@ -0,0 +1,4 @@
+Branch          | GH Actions | codecov.io |
+:-------------: | ---------- | ---------- |
+[`master`](https://github.com/mzimbres/aedis/tree/master) | [![CI](https://github.com/mzimbres/aedis/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/mzimbres/aedis/actions/workflows/ci.yml) | [![codecov](https://codecov.io/gh/mzimbres/aedis/branch/master/graph/badge.svg)](https://codecov.io/gh/mzimbres/aedis/branch/master)
+

CMakeLists.txt

@@ -0,0 +1,78 @@
+cmake_minimum_required(VERSION 3.8...3.20)
+
+# determine whether it's main/root project
+# or being built under another project.
+if (NOT DEFINED BOOST_REDIS_MAIN_PROJECT)
+  set(BOOST_REDIS_MAIN_PROJECT OFF)
+  if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+    set(BOOST_REDIS_MAIN_PROJECT ON)
+  endif()
+endif()
+
+project(boost_redis VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
+
+# Library
+add_library(boost_redis INTERFACE)
+add_library(Boost::redis ALIAS boost_redis)
+target_include_directories(boost_redis INTERFACE include)
+target_compile_features(boost_redis INTERFACE cxx_std_17)
+
+# Dependencies
+if (BOOST_REDIS_MAIN_PROJECT)
+  # If we're the root project, error if a dependency is not found
+  find_package(Boost 1.83 REQUIRED COMPONENTS headers)
+  find_package(Threads REQUIRED)
+  find_package(OpenSSL REQUIRED)
+  target_link_libraries(boost_redis
+    INTERFACE
+      Boost::headers
+      Threads::Threads
+      OpenSSL::Crypto
+      OpenSSL::SSL
+  )
+else()
+  # If we're in the superproject or called from add_subdirectory,
+  # Boost dependencies should be already available.
+  # If other dependencies are not found, we bail out
+  find_package(Threads)
+  if(NOT Threads_FOUND)
+    message(STATUS "Boost.Redis has been disabled, because the required package Threads hasn't been found")
+    return()
+  endif()
+  find_package(OpenSSL)
+  if(NOT OpenSSL_FOUND)
+    message(STATUS "Boost.Redis has been disabled, because the required package OpenSSL hasn't been found")
+    return()
+  endif()
+
+  # This is generated by boostdep
+  target_link_libraries(boost_redis
+    INTERFACE
+      Boost::asio
+      Boost::assert
+      Boost::core
+      Boost::mp11
+      Boost::system
+      Boost::throw_exception
+      Threads::Threads
+      OpenSSL::Crypto
+      OpenSSL::SSL
+  )
+endif()
+
+# Enable testing. If we're being called from the superproject, this has already been done
+if (BOOST_REDIS_MAIN_PROJECT)
+  include(CTest)
+endif()
+
+# Most tests require a running Redis server, so we only run them if we're the main project
+if(BOOST_REDIS_MAIN_PROJECT AND BUILD_TESTING)
+  # Tests and common utilities
+  add_subdirectory(test)
+
+  # Benchmarks. Build them with tests to prevent code rotting
+  add_subdirectory(benchmarks)
+
+  # Examples
+  add_subdirectory(example)
+endif()

CMakePresets.json

@@ -0,0 +1,178 @@
+{
+  "version": 2,
+  "cmakeMinimumRequired": {
+    "major": 3,
+    "minor": 14,
+    "patch": 0
+  },
+  "configurePresets": [
+    {
+      "name": "cmake-pedantic",
+      "hidden": true,
+      "warnings": {
+        "dev": true,
+        "deprecated": true,
+        "uninitialized": false,
+        "unusedCli": true,
+        "systemVars": false
+      },
+      "errors": {
+        "dev": true,
+        "deprecated": true
+      }
+    },
+    {
+      "name": "coverage",
+      "generator": "Unix Makefiles",
+      "hidden": false,
+      "inherits": ["cmake-pedantic"],
+      "binaryDir": "${sourceDir}/build/coverage",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Coverage",
+        "CMAKE_CXX_EXTENSIONS": "OFF",
+        "CMAKE_CXX_FLAGS": "-Wall -Wextra",
+        "CMAKE_CXX_FLAGS_COVERAGE": "-Og -g --coverage -fkeep-inline-functions -fkeep-static-functions",
+        "CMAKE_CXX_STANDARD_REQUIRED": "ON",
+        "CMAKE_EXE_LINKER_FLAGS_COVERAGE": "--coverage",
+        "CMAKE_SHARED_LINKER_FLAGS_COVERAGE": "--coverage",
+        "PROJECT_BINARY_DIR": "${sourceDir}/build/coverage",
+        "COVERAGE_HTML_COMMAND": ""
+      }
+    },
+    {
+      "name": "g++-11",
+      "generator": "Unix Makefiles",
+      "hidden": false,
+      "inherits": ["cmake-pedantic"],
+      "binaryDir": "${sourceDir}/build/g++-11",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Debug",
+        "CMAKE_CXX_EXTENSIONS": "OFF",
+        "CMAKE_CXX_FLAGS": "-Wall -Wextra -fsanitize=address",
+        "CMAKE_CXX_COMPILER": "g++-11",
+        "CMAKE_SHARED_LINKER_FLAGS": "-fsanitize=address",
+        "CMAKE_CXX_STANDARD_REQUIRED": "ON",
+        "PROJECT_BINARY_DIR": "${sourceDir}/build/g++-11"
+      }
+    },
+    {
+      "name": "g++-11-release",
+      "generator": "Unix Makefiles",
+      "hidden": false,
+      "inherits": ["cmake-pedantic"],
+      "binaryDir": "${sourceDir}/build/g++-11-release",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Release",
+        "CMAKE_CXX_EXTENSIONS": "OFF",
+        "CMAKE_CXX_FLAGS": "-Wall -Wextra",
+        "CMAKE_CXX_COMPILER": "g++-11",
+        "CMAKE_SHARED_LINKER_FLAGS": "",
+        "CMAKE_CXX_STANDARD_REQUIRED": "ON",
+        "PROJECT_BINARY_DIR": "${sourceDir}/build/g++-11-release"
+      }
+    },
+    {
+      "name": "clang++-13",
+      "generator": "Unix Makefiles",
+      "hidden": false,
+      "inherits": ["cmake-pedantic"],
+      "binaryDir": "${sourceDir}/build/clang++-13",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Debug",
+        "CMAKE_CXX_EXTENSIONS": "OFF",
+        "CMAKE_CXX_FLAGS": "-Wall -Wextra -fsanitize=address",
+        "CMAKE_CXX_COMPILER": "clang++-13",
+        "CMAKE_SHARED_LINKER_FLAGS": "-fsanitize=address",
+        "CMAKE_CXX_STANDARD_REQUIRED": "ON",
+        "PROJECT_BINARY_DIR": "${sourceDir}/build/clang++-13"
+      }
+    },
+    {
+      "name": "clang++-14",
+      "generator": "Unix Makefiles",
+      "hidden": false,
+      "inherits": ["cmake-pedantic"],
+      "binaryDir": "${sourceDir}/build/clang++-14",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Debug",
+        "CMAKE_CXX_EXTENSIONS": "OFF",
+        "CMAKE_CXX_FLAGS": "-Wall -Wextra -fsanitize=address",
+        "CMAKE_CXX_COMPILER": "clang++-14",
+        "CMAKE_SHARED_LINKER_FLAGS": "-fsanitize=address",
+        "CMAKE_CXX_STANDARD_REQUIRED": "ON",
+        "PROJECT_BINARY_DIR": "${sourceDir}/build/clang++-14"
+      }
+    },
+    {
+      "name": "libc++-14-cpp17",
+      "generator": "Unix Makefiles",
+      "hidden": false,
+      "inherits": ["cmake-pedantic"],
+      "binaryDir": "${sourceDir}/build/libc++-14-cpp17",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Debug",
+        "CMAKE_CXX_EXTENSIONS": "OFF",
+        "CMAKE_CXX_FLAGS": "-Wall -Wextra -stdlib=libc++ -std=c++17",
+        "CMAKE_EXE_LINKER_FLAGS": "-lc++",
+        "CMAKE_CXX_COMPILER": "clang++-14",
+        "CMAKE_SHARED_LINKER_FLAGS": "",
+        "CMAKE_CXX_STANDARD_REQUIRED": "ON",
+        "PROJECT_BINARY_DIR": "${sourceDir}/build/libc++-14-cpp17"
+      }
+    },
+    {
+      "name": "libc++-14-cpp20",
+      "generator": "Unix Makefiles",
+      "hidden": false,
+      "inherits": ["cmake-pedantic"],
+      "binaryDir": "${sourceDir}/build/libc++-14-cpp20",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Debug",
+        "CMAKE_CXX_EXTENSIONS": "OFF",
+        "CMAKE_CXX_FLAGS": "-Wall -Wextra -stdlib=libc++ -std=c++17",
+        "CMAKE_EXE_LINKER_FLAGS": "-lc++",
+        "CMAKE_CXX_COMPILER": "clang++-14",
+        "CMAKE_SHARED_LINKER_FLAGS": "",
+        "CMAKE_CXX_STANDARD_REQUIRED": "ON",
+        "PROJECT_BINARY_DIR": "${sourceDir}/build/libc++-14-cpp20"
+      }
+    },
+    {
+      "name": "clang-tidy",
+      "generator": "Unix Makefiles",
+      "hidden": false,
+      "inherits": ["g++-11"],
+      "binaryDir": "${sourceDir}/build/clang-tidy",
+      "cacheVariables": {
+        "CMAKE_CXX_CLANG_TIDY": "clang-tidy;--header-filter=${sourceDir}/include/*",
+        "CMAKE_CXX_STANDARD": "20"
+      }
+    }
+  ],
+  "buildPresets": [
+     { "name": "coverage", "configurePreset": "coverage" },
+     { "name": "g++-11", "configurePreset": "g++-11" },
+     { "name": "g++-11-release", "configurePreset": "g++-11-release" },
+     { "name": "clang++-13", "configurePreset": "clang++-13" },
+     { "name": "clang++-14", "configurePreset": "clang++-14" },
+     { "name": "libc++-14-cpp17", "configurePreset": "libc++-14-cpp17" },
+     { "name": "libc++-14-cpp20", "configurePreset": "libc++-14-cpp20" },
+     { "name": "clang-tidy", "configurePreset": "clang-tidy" }
+  ],
+  "testPresets": [
+     {
+       "name": "test",
+       "hidden": true,
+       "output": {"outputOnFailure": true},
+       "execution": {"noTestsAction": "error", "stopOnFailure": true}
+     },
+     { "name": "coverage",        "configurePreset": "coverage",         "inherits": ["test"] },
+     { "name": "g++-11",          "configurePreset": "g++-11",           "inherits": ["test"] },
+     { "name": "g++-11-release",  "configurePreset": "g++-11-release",   "inherits": ["test"] },
+     { "name": "clang++-13",      "configurePreset": "clang++-13",       "inherits": ["test"] },
+     { "name": "clang++-14",      "configurePreset": "clang++-14",       "inherits": ["test"] },
+     { "name": "libc++-14-cpp17", "configurePreset": "libc++-14-cpp17",  "inherits": ["test"] },
+     { "name": "libc++-14-cpp20", "configurePreset": "libc++-14-cpp20",  "inherits": ["test"] },
+     { "name": "clang-tidy",      "configurePreset": "clang-tidy",       "inherits": ["test"] }
+  ]
+}

INSTALL

@@ -1 +0,0 @@
-See https://mzimbres.github.io/aedis/#using-aedis

Makefile.am

@@ -1,104 +0,0 @@
-AUTOMAKE_OPTIONS = subdir-objects
-ACLOCAL_AMFLAGS = -I m4
-
-AM_COLOR_TESTS = always
-DISTCHECK_CONFIGURE_FLAGS = CPPFLAGS="$(BOOST_CPPFLAGS) $(CPPFLAGS)" LDFLAGS="$(BOOST_LDFLAGS)"
-
-AM_CPPFLAGS =
-AM_CPPFLAGS += $(BOOST_CPPFLAGS)
-#AM_CPPFLAGS += -I$(top_srcdir)/include
-
-AM_LDFLAGS =
-AM_LDFLAGS += -pthread
-
-check_PROGRAMS =
-check_PROGRAMS += intro_sync
-check_PROGRAMS += serialization_sync
-check_PROGRAMS += intro_high_level
-check_PROGRAMS += aggregates_high_level
-check_PROGRAMS += test_low_level
-check_PROGRAMS += test_high_level
-if HAVE_CXX20
-check_PROGRAMS += transaction
-check_PROGRAMS += custom_adapter
-endif
-
-EXTRA_PROGRAMS =
-EXTRA_PROGRAMS += subscriber_high_level
-EXTRA_PROGRAMS += commands
-if HAVE_CXX20
-EXTRA_PROGRAMS += subscriber
-EXTRA_PROGRAMS += echo_server
-EXTRA_PROGRAMS += chat_room
-endif
-
-CLEANFILES =
-CLEANFILES += $(EXTRA_PROGRAMS)
-
-.PHONY: all
-all: $(check_PROGRAMS) $(EXTRA_PROGRAMS)
-
-intro_high_level_SOURCES = $(top_srcdir)/examples/intro_high_level.cpp
-aggregates_high_level_SOURCES = $(top_srcdir)/examples/aggregates_high_level.cpp
-intro_sync_SOURCES = $(top_srcdir)/examples/intro_sync.cpp
-serialization_sync_SOURCES = $(top_srcdir)/examples/serialization_sync.cpp
-commands_SOURCES = $(top_srcdir)/tools/commands.cpp
-subscriber_high_level_SOURCES = $(top_srcdir)/examples/subscriber_high_level.cpp
-test_low_level_SOURCES = $(top_srcdir)/tests/low_level.cpp
-test_high_level_SOURCES = $(top_srcdir)/tests/high_level.cpp
-if HAVE_CXX20
-transaction_SOURCES = $(top_srcdir)/examples/transaction.cpp
-subscriber_SOURCES = $(top_srcdir)/examples/subscriber.cpp
-custom_adapter_SOURCES = $(top_srcdir)/examples/custom_adapter.cpp
-echo_server_SOURCES = $(top_srcdir)/examples/echo_server.cpp
-chat_room_SOURCES = $(top_srcdir)/examples/chat_room.cpp
-endif
-
-nobase_include_HEADERS =\
-  $(top_srcdir)/aedis/src.hpp\
-  $(top_srcdir)/aedis/redis/command.hpp\
-  $(top_srcdir)/aedis/generic/client.hpp\
-  $(top_srcdir)/aedis/generic/serializer.hpp\
-  $(top_srcdir)/aedis/generic/error.hpp\
-  $(top_srcdir)/aedis/generic/impl/error.ipp\
-  $(top_srcdir)/aedis/generic/detail/client_ops.hpp\
-  $(top_srcdir)/aedis/sentinel/command.hpp\
-  $(top_srcdir)/aedis/aedis.hpp\
-  $(top_srcdir)/aedis/adapter/detail/adapters.hpp\
-  $(top_srcdir)/aedis/adapter/error.hpp\
-  $(top_srcdir)/aedis/adapter/impl/error.ipp\
-  $(top_srcdir)/aedis/adapter/adapt.hpp\
-  $(top_srcdir)/aedis/adapter/detail/response_traits.hpp\
-  $(top_srcdir)/aedis/resp3/node.hpp\
-  $(top_srcdir)/aedis/resp3/compose.hpp\
-  $(top_srcdir)/aedis/resp3/detail/read_ops.hpp\
-  $(top_srcdir)/aedis/resp3/detail/parser.hpp\
-  $(top_srcdir)/aedis/resp3/error.hpp\
-  $(top_srcdir)/aedis/resp3/impl/error.ipp\
-  $(top_srcdir)/aedis/resp3/type.hpp\
-  $(top_srcdir)/aedis/resp3/read.hpp\
-  $(top_srcdir)/aedis/redis/impl/command.ipp\
-  $(top_srcdir)/aedis/sentinel/impl/command.ipp\
-  $(top_srcdir)/aedis/resp3/detail/impl/parser.ipp\
-  $(top_srcdir)/aedis/resp3/impl/type.ipp
-
-nobase_noinst_HEADERS =\
-  $(top_srcdir)/examples/user_session.hpp\
-  $(top_srcdir)/examples/print.hpp\
-  $(top_srcdir)/examples/mystruct.hpp\
-  $(top_srcdir)/tests/check.hpp
-
-TESTS = $(check_PROGRAMS)
-
-EXTRA_DIST =
-EXTRA_DIST += $(top_srcdir)/README.md
-EXTRA_DIST += $(top_srcdir)/doc/DoxygenLayout.xml
-EXTRA_DIST += $(top_srcdir)/doc/aedis.css
-EXTRA_DIST += $(top_srcdir)/doc/htmlfooter.html
-EXTRA_DIST += $(top_srcdir)/doc/htmlheader.html
-
-.PHONY: doc
-doc:
-	rm -rf ../aedis-gh-pages/*
-	doxygen doc/Doxyfile
-

README.md

@@ -1 +1,993 @@
-See https://mzimbres.github.io/aedis/
+# Boost.Redis
+
+Boost.Redis is a high-level [Redis](https://redis.io/) client library built on top of
+[Boost.Asio](https://www.boost.org/doc/libs/release/doc/html/boost_asio.html)
+that implements the Redis protocol
+[RESP3](https://github.com/redis/redis-specifications/blob/master/protocol/RESP3.md).
+The requirements for using Boost.Redis are:
+
+* Boost. The library is included in Boost distributions starting with 1.84.
+* C++17 or higher.
+* Redis 6 or higher (must support RESP3).
+* Gcc (10, 11, 12), Clang (11, 13, 14) and Visual Studio (16 2019, 17 2022).
+* Have basic-level knowledge about [Redis](https://redis.io/docs/)
+  and [Boost.Asio](https://www.boost.org/doc/libs/1_82_0/doc/html/boost_asio/overview.html).
+
+The latest release can be downloaded on
+https://github.com/boostorg/redis/releases. The library headers can be
+found in the `include` subdirectory and a compilation of the source
+
+```cpp
+#include <boost/redis/src.hpp>
+```
+
+is required. The simplest way to do it is to included this header in
+no more than one source file in your applications. To build the
+examples and tests cmake is supported, for example
+
+```cpp
+# Linux
+$ BOOST_ROOT=/opt/boost_1_81_0 cmake --preset g++-11
+
+# Windows 
+$ cmake -G "Visual Studio 17 2022" -A x64 -B bin64 -DCMAKE_TOOLCHAIN_FILE=C:/vcpkg/scripts/buildsystems/vcpkg.cmake
+```
+
+<a name="connection"></a>
+## Connection
+
+Let us start with a simple application that uses a short-lived
+connection to send a [ping](https://redis.io/commands/ping/) command
+to Redis
+
+```cpp
+auto co_main(config const& cfg) -> net::awaitable<void>
+{
+   auto conn = std::make_shared<connection>(co_await net::this_coro::executor);
+   conn->async_run(cfg, {}, net::consign(net::detached, conn));
+
+   // A request containing only a ping command.
+   request req;
+   req.push("PING", "Hello world");
+
+   // Response where the PONG response will be stored.
+   response<std::string> resp;
+
+   // Executes the request.
+   co_await conn->async_exec(req, resp, net::deferred);
+   conn->cancel();
+
+   std::cout << "PING: " << std::get<0>(resp).value() << std::endl;
+}
+```
+
+The roles played by the `async_run` and `async_exec` functions are
+
+* `async_exec`: Execute the commands contained in the
+  request and store the individual responses in the `resp` object. Can
+  be called from multiple places in your code concurrently.
+* `async_run`: Resolve, connect, ssl-handshake,
+  resp3-handshake, health-checks, reconnection and coordinate low-level
+  read and write operations (among other things).
+
+### Server pushes
+
+Redis servers can also send a variety of pushes to the client, some of
+them are
+
+* [Pubsub](https://redis.io/docs/manual/pubsub/)
+* [Keyspace notification](https://redis.io/docs/manual/keyspace-notifications/)
+* [Client-side caching](https://redis.io/docs/manual/client-side-caching/)
+
+The connection class supports server pushes by means of the
+`boost::redis::connection::async_receive` function, which can be
+called in the same connection that is being used to execute commands.
+The coroutine below shows how to used it
+
+```cpp
+auto
+receiver(std::shared_ptr<connection> conn) -> net::awaitable<void>
+{
+   request req;
+   req.push("SUBSCRIBE", "channel");
+
+   generic_response resp;
+   conn->set_receive_response(resp);
+
+   // Loop while reconnection is enabled
+   while (conn->will_reconnect()) {
+
+      // Reconnect to channels.
+      co_await conn->async_exec(req, ignore, net::deferred);
+
+      // Loop reading Redis pushes.
+      for (;;) {
+         error_code ec;
+         co_await conn->async_receive(resp, net::redirect_error(net::use_awaitable, ec));
+         if (ec)
+            break; // Connection lost, break so we can reconnect to channels.
+
+         // Use the response resp in some way and then clear it.
+         ...
+
+         consume_one(resp);
+      }
+   }
+}
+
+```
+
+<a name="requests"></a>
+## Requests
+
+Redis requests are composed of one or more commands (in the
+Redis documentation they are called
+[pipelines](https://redis.io/topics/pipelining)). For example
+
+```cpp
+// Some example containers.
+std::list<std::string> list {...};
+std::map<std::string, mystruct> map { ...};
+
+// The request can contain multiple commands.
+request req;
+
+// Command with variable length of arguments.
+req.push("SET", "key", "some value", "EX", "2");
+
+// Pushes a list.
+req.push_range("SUBSCRIBE", list);
+
+// Same as above but as an iterator range.
+req.push_range("SUBSCRIBE", std::cbegin(list), std::cend(list));
+
+// Pushes a map.
+req.push_range("HSET", "key", map);
+```
+
+Sending a request to Redis is performed with `boost::redis::connection::async_exec` as already stated.
+
+### Config flags
+
+The `boost::redis::request::config` object inside the request dictates how the
+`boost::redis::connection` should handle the request in some important situations. The
+reader is advised to read it carefully.
+
+<a name="responses"></a>
+## Responses
+
+Boost.Redis uses the following strategy to support Redis responses
+
+* `boost::redis::request` is used for requests whose number of commands are not dynamic.
+* **Dynamic**: Otherwise use `boost::redis::generic_response`.
+
+For example, the request below has three commands
+
+```cpp
+request req;
+req.push("PING");
+req.push("INCR", "key");
+req.push("QUIT");
+```
+
+and its response also has three comamnds and can be read in the
+following response object
+
+```cpp
+response<std::string, int, std::string>
+```
+
+The response behaves as a tuple and must
+have as many elements as the request has commands (exceptions below).
+It is also necessary that each tuple element is capable of storing the
+response to the command it refers to, otherwise an error will occur.
+To ignore responses to individual commands in the request use the tag
+`boost::redis::ignore_t`, for example
+
+```cpp
+// Ignore the second and last responses.
+response<std::string, boost::redis::ignore_t, std::string, boost::redis::ignore_t>
+```
+
+The following table provides the resp3-types returned by some Redis
+commands
+
+Command  | RESP3 type                          | Documentation
+---------|-------------------------------------|--------------
+lpush    | Number                              | https://redis.io/commands/lpush
+lrange   | Array                               | https://redis.io/commands/lrange
+set      | Simple-string, null or blob-string  | https://redis.io/commands/set
+get      | Blob-string                         | https://redis.io/commands/get
+smembers | Set                                 | https://redis.io/commands/smembers
+hgetall  | Map                                 | https://redis.io/commands/hgetall
+
+To map these RESP3 types into a C++ data structure use the table below
+
+RESP3 type     | Possible C++ type                                            | Type
+---------------|--------------------------------------------------------------|------------------
+Simple-string  | `std::string`                                              | Simple
+Simple-error   | `std::string`                                              | Simple
+Blob-string    | `std::string`, `std::vector`                               | Simple
+Blob-error     | `std::string`, `std::vector`                               | Simple
+Number         | `long long`, `int`, `std::size_t`, `std::string`           | Simple
+Double         | `double`, `std::string`                                    | Simple
+Null           | `std::optional<T>`                                         | Simple
+Array          | `std::vector`, `std::list`, `std::array`, `std::deque`     | Aggregate
+Map            | `std::vector`, `std::map`, `std::unordered_map`            | Aggregate
+Set            | `std::vector`, `std::set`, `std::unordered_set`            | Aggregate
+Push           | `std::vector`, `std::map`, `std::unordered_map`            | Aggregate
+
+For example, the response to the request
+
+```cpp
+request req;
+req.push("HELLO", 3);
+req.push_range("RPUSH", "key1", vec);
+req.push_range("HSET", "key2", map);
+req.push("LRANGE", "key3", 0, -1);
+req.push("HGETALL", "key4");
+req.push("QUIT");
+
+```
+
+can be read in the tuple below
+
+```cpp
+response<
+   redis::ignore_t,  // hello
+   int,              // rpush
+   int,              // hset
+   std::vector<T>,   // lrange
+   std::map<U, V>,   // hgetall
+   std::string       // quit
+> resp;
+```
+
+Where both are passed to `async_exec` as showed elsewhere
+
+```cpp
+co_await conn->async_exec(req, resp, net::deferred);
+```
+
+If the intention is to ignore responses altogether use `ignore`
+
+```cpp
+// Ignores the response
+co_await conn->async_exec(req, ignore, net::deferred);
+```
+
+Responses that contain nested aggregates or heterogeneous data
+types will be given special treatment later in [The general case](#the-general-case).  As
+of this writing, not all RESP3 types are used by the Redis server,
+which means in practice users will be concerned with a reduced
+subset of the RESP3 specification.
+
+### Pushes
+
+Commands that have no response like
+
+* `"SUBSCRIBE"`
+* `"PSUBSCRIBE"`
+* `"UNSUBSCRIBE"`
+
+must **NOT** be included in the response tuple. For example, the request below
+
+```cpp
+request req;
+req.push("PING");
+req.push("SUBSCRIBE", "channel");
+req.push("QUIT");
+```
+
+must be read in this tuple `response<std::string, std::string>`,
+that has static size two.
+
+### Null
+
+It is not uncommon for apps to access keys that do not exist or
+that have already expired in the Redis server, to deal with these
+cases Boost.Redis provides support for `std::optional`. To use it,
+wrap your type around `std::optional` like this
+
+```cpp
+response<
+   std::optional<A>,
+   std::optional<B>,
+   ...
+   > resp;
+
+co_await conn->async_exec(req, resp, net::deferred);
+```
+
+Everything else stays pretty much the same.
+
+### Transactions
+
+To read responses to transactions we must first observe that Redis
+will queue the transaction commands and send their individual
+responses as elements of an array, the array is itself the response to
+the `EXEC` command.  For example, to read the response to this request
+
+```cpp
+req.push("MULTI");
+req.push("GET", "key1");
+req.push("LRANGE", "key2", 0, -1);
+req.push("HGETALL", "key3");
+req.push("EXEC");
+```
+
+use the following response type
+
+```cpp
+using boost::redis::ignore;
+
+using exec_resp_type = 
+   response<
+      std::optional<std::string>, // get
+      std::optional<std::vector<std::string>>, // lrange
+      std::optional<std::map<std::string, std::string>> // hgetall
+   >;
+
+response<
+   boost::redis::ignore_t,  // multi
+   boost::redis::ignore_t,  // get
+   boost::redis::ignore_t,  // lrange
+   boost::redis::ignore_t,  // hgetall
+   exec_resp_type,        // exec
+> resp;
+
+co_await conn->async_exec(req, resp, net::deferred);
+```
+
+For a complete example see cpp20_containers.cpp.
+
+<a name="the-general-case"></a>
+
+### The general case
+
+There are cases where responses to Redis
+commands won't fit in the model presented above, some examples are
+
+* Commands (like `set`) whose responses don't have a fixed
+  RESP3 type. Expecting an `int` and receiving a blob-string
+  will result in error.
+* RESP3 aggregates that contain nested aggregates can't be read in STL containers.
+* Transactions with a dynamic number of commands can't be read in a `response`.
+
+To deal with these cases Boost.Redis provides the `boost::redis::resp3::node` type
+abstraction, that is the most general form of an element in a
+response, be it a simple RESP3 type or the element of an aggregate. It
+is defined like this
+
+```cpp
+template <class String>
+struct basic_node {
+   // The RESP3 type of the data in this node.
+   type data_type;
+
+   // The number of elements of an aggregate (or 1 for simple data).
+   std::size_t aggregate_size;
+
+   // The depth of this node in the response tree.
+   std::size_t depth;
+
+   // The actual data. For aggregate types this is always empty.
+   String value;
+};
+```
+
+Any response to a Redis command can be received in a
+`boost::redis::generic_response`.  The vector can be seen as a
+pre-order view of the response tree.  Using it is not different than
+using other types
+
+```cpp
+// Receives any RESP3 simple or aggregate data type.
+boost::redis::generic_response resp;
+co_await conn->async_exec(req, resp, net::deferred);
+```
+
+For example, suppose we want to retrieve a hash data structure
+from Redis with `HGETALL`, some of the options are
+
+* `boost::redis::generic_response`: Works always.
+* `std::vector<std::string>`: Efficient and flat, all elements as string.
+* `std::map<std::string, std::string>`: Efficient if you need the data as a `std::map`.
+* `std::map<U, V>`: Efficient if you are storing serialized data. Avoids temporaries and requires `boost_redis_from_bulk` for `U` and `V`.
+
+In addition to the above users can also use unordered versions of the
+containers. The same reasoning applies to sets e.g. `SMEMBERS`
+and other data structures in general.
+
+<a name="serialization"></a>
+## Serialization
+
+Boost.Redis supports serialization of user defined types by means of
+the following customization points
+
+```cpp
+
+// Serialize.
+void boost_redis_to_bulk(std::string& to, mystruct const& obj);
+
+// Deserialize
+void boost_redis_from_bulk(mystruct& obj, char const* p, std::size_t size, boost::system::error_code& ec)
+```
+
+These functions are accessed over ADL and therefore they must be
+imported in the global namespace by the user.  In the
+[Examples](#examples) section the reader can find examples showing how
+to serialize using json and [protobuf](https://protobuf.dev/).
+
+<a name="examples"></a>
+## Examples
+
+The examples below show how to use the features discussed so far
+
+* cpp20_intro.cpp: Does not use awaitable operators.
+* cpp20_intro_tls.cpp: Communicates over TLS.
+* cpp20_containers.cpp: Shows how to send and receive STL containers and how to use transactions.
+* cpp20_json.cpp: Shows how to serialize types using Boost.Json.
+* cpp20_protobuf.cpp: Shows how to serialize types using protobuf.
+* cpp20_resolve_with_sentinel.cpp: Shows how to resolve a master address using sentinels.
+* cpp20_subscriber.cpp: Shows how to implement pubsub with reconnection re-subscription.
+* cpp20_echo_server.cpp: A simple TCP echo server.
+* cpp20_chat_room.cpp: A command line chat built on Redis pubsub.
+* cpp17_intro.cpp: Uses callbacks and requires C++17.
+* cpp17_intro_sync.cpp: Runs `async_run` in a separate thread and performs synchronous calls to `async_exec`.
+
+The main function used in some async examples has been factored out in
+the main.cpp file.
+
+## Echo server benchmark
+
+This document benchmarks the performance of TCP echo servers I
+implemented in different languages using different Redis clients.  The
+main motivations for choosing an echo server are
+
+   * Simple to implement and does not require expertise level in most languages.
+   * I/O bound: Echo servers have very low CPU consumption in general
+     and  therefore are excelent to  measure how a program handles concurrent requests.
+   * It simulates very well a typical backend in regard to concurrency.
+
+I also imposed some constraints on the implementations
+
+   * It should be simple enough and not require writing too much code.
+   * Favor the use standard idioms and avoid optimizations that require expert level.
+   * Avoid the use of complex things like connection and thread pool.
+
+To reproduce these results run one of the echo-server programs in one
+terminal and the
+[echo-server-client](https://github.com/boostorg/redis/blob/42880e788bec6020dd018194075a211ad9f339e8/benchmarks/cpp/asio/echo_server_client.cpp)
+in another.
+
+### Without Redis
+
+First I tested a pure TCP echo server, i.e. one that sends the messages
+directly to the client without interacting with Redis. The result can
+be seen below
+
+![](https://boostorg.github.io/redis/tcp-echo-direct.png)
+
+The tests were performed with a 1000 concurrent TCP connections on the
+localhost where latency is 0.07ms on average on my machine. On higher
+latency networks the difference among libraries is expected to
+decrease. 
+
+   * I expected Libuv to have similar performance to Asio and Tokio.
+   * I did expect nodejs to come a little behind given it is is
+     javascript code. Otherwise I did expect it to have similar
+     performance to libuv since it is the framework behind it.
+   * Go did surprise me: faster than nodejs and libuv!
+
+The code used in the benchmarks can be found at
+
+   * [Asio](https://github.com/boostorg/redis/blob/3fb018ccc6138d310ac8b73540391cdd8f2fdad6/benchmarks/cpp/asio/echo_server_direct.cpp): A variation of [this](https://github.com/chriskohlhoff/asio/blob/4915cfd8a1653c157a1480162ae5601318553eb8/asio/src/examples/cpp20/coroutines/echo_server.cpp) Asio example.
+   * [Libuv](https://github.com/boostorg/redis/tree/835a1decf477b09317f391eddd0727213cdbe12b/benchmarks/c/libuv): Taken from [here](https://github.com/libuv/libuv/blob/06948c6ee502862524f233af4e2c3e4ca876f5f6/docs/code/tcp-echo-server/main.c) Libuv example .
+   * [Tokio](https://github.com/boostorg/redis/tree/3fb018ccc6138d310ac8b73540391cdd8f2fdad6/benchmarks/rust/echo_server_direct): Taken from [here](https://docs.rs/tokio/latest/tokio/).
+   * [Nodejs](https://github.com/boostorg/redis/tree/3fb018ccc6138d310ac8b73540391cdd8f2fdad6/benchmarks/nodejs/echo_server_direct)
+   * [Go](https://github.com/boostorg/redis/blob/3fb018ccc6138d310ac8b73540391cdd8f2fdad6/benchmarks/go/echo_server_direct.go)
+
+### With Redis
+
+This is similar to the echo server described above but messages are
+echoed by Redis and not by the echo-server itself, which acts
+as a proxy between the client and the Redis server. The results
+can be seen below
+
+![](https://boostorg.github.io/redis/tcp-echo-over-redis.png)
+
+The tests were performed on a network where latency is 35ms on
+average, otherwise it uses the same number of TCP connections
+as the previous example.
+
+As the reader can see, the Libuv and the Rust test are not depicted
+in the graph, the reasons are
+
+   * [redis-rs](https://github.com/redis-rs/redis-rs): This client
+     comes so far behind that it can't even be represented together
+     with the other benchmarks without making them look insignificant.
+     I don't know for sure why it is so slow, I suppose it has
+     something to do with its lack of automatic
+     [pipelining](https://redis.io/docs/manual/pipelining/) support.
+     In fact, the more TCP connections I lauch the worse its
+     performance gets.
+
+   * Libuv: I left it out because it would require me writing to much
+     c code. More specifically, I would have to use hiredis and
+     implement support for pipelines manually.
+
+The code used in the benchmarks can be found at
+
+   * [Boost.Redis](https://github.com/boostorg/redis): [code](https://github.com/boostorg/redis/blob/3fb018ccc6138d310ac8b73540391cdd8f2fdad6/examples/echo_server.cpp)
+   * [node-redis](https://github.com/redis/node-redis): [code](https://github.com/boostorg/redis/tree/3fb018ccc6138d310ac8b73540391cdd8f2fdad6/benchmarks/nodejs/echo_server_over_redis)
+   * [go-redis](https://github.com/go-redis/redis): [code](https://github.com/boostorg/redis/blob/3fb018ccc6138d310ac8b73540391cdd8f2fdad6/benchmarks/go/echo_server_over_redis.go)
+
+### Conclusion
+
+Redis clients have to support automatic pipelining to have competitive performance. For updates to this document follow https://github.com/boostorg/redis.
+
+## Comparison
+
+The main reason for why I started writing Boost.Redis was to have a client
+compatible with the Asio asynchronous model. As I made progresses I could
+also address what I considered weaknesses in other libraries.  Due to
+time constraints I won't be able to give a detailed comparison with
+each client listed in the
+[official](https://redis.io/docs/clients/#cpp) list,
+instead I will focus on the most popular C++ client on github in number of
+stars, namely
+
+* https://github.com/sewenew/redis-plus-plus
+
+### Boost.Redis vs Redis-plus-plus
+
+Before we start it is important to mention some of the things
+redis-plus-plus does not support
+
+* The latest version of the communication protocol RESP3. Without that it is impossible to support some important Redis features like client side caching, among other things.
+* Coroutines.
+* Reading responses directly in user data structures to avoid creating temporaries.
+* Error handling with support for error-code.
+* Cancellation.
+
+The remaining points will be addressed individually.  Let us first
+have a look at what sending a command a pipeline and a transaction
+look like
+
+```cpp
+auto redis = Redis("tcp://127.0.0.1:6379");
+
+// Send commands
+redis.set("key", "val");
+auto val = redis.get("key"); // val is of type OptionalString.
+if (val)
+    std::cout << *val << std::endl;
+
+// Sending pipelines
+auto pipe = redis.pipeline();
+auto pipe_replies = pipe.set("key", "value")
+                        .get("key")
+                        .rename("key", "new-key")
+                        .rpush("list", {"a", "b", "c"})
+                        .lrange("list", 0, -1)
+                        .exec();
+
+// Parse reply with reply type and index.
+auto set_cmd_result = pipe_replies.get<bool>(0);
+// ...
+
+// Sending a transaction
+auto tx = redis.transaction();
+auto tx_replies = tx.incr("num0")
+                    .incr("num1")
+                    .mget({"num0", "num1"})
+                    .exec();
+
+auto incr_result0 = tx_replies.get<long long>(0);
+// ...
+```
+
+Some of the problems with this API are
+
+* Heterogeneous treatment of commands, pipelines and transaction. This makes auto-pipelining impossible.
+* Any Api that sends individual commands has a very restricted scope of usability and should be avoided for performance reasons.
+* The API imposes exceptions on users, no error-code overload is provided.
+* No way to reuse the buffer for new calls to e.g. redis.get in order to avoid further dynamic memory allocations.
+* Error handling of resolve and connection not clear.
+
+According to the documentation, pipelines in redis-plus-plus have
+the following characteristics
+
+> NOTE: By default, creating a Pipeline object is NOT cheap, since
+> it creates a new connection.
+
+This is clearly a downside in the API as pipelines should be the
+default way of communicating and not an exception, paying such a
+high price for each pipeline imposes a severe cost in performance.
+Transactions also suffer from the very same problem.
+
+> NOTE: Creating a Transaction object is NOT cheap, since it
+> creates a new connection.
+
+In Boost.Redis there is no difference between sending one command, a
+pipeline or a transaction because requests are decoupled
+from the IO objects.
+
+> redis-plus-plus also supports async interface, however, async
+> support for Transaction and Subscriber is still on the way.
+> 
+> The async interface depends on third-party event library, and so
+> far, only libuv is supported.
+
+Async code in redis-plus-plus looks like the following
+
+```cpp
+auto async_redis = AsyncRedis(opts, pool_opts);
+
+Future<string> ping_res = async_redis.ping();
+
+cout << ping_res.get() << endl;
+```
+As the reader can see, the async interface is based on futures
+which is also known to have a bad performance.  The biggest
+problem however with this async design is that it makes it
+impossible to write asynchronous programs correctly since it
+starts an async operation on every command sent instead of
+enqueueing a message and triggering a write when it can be sent.
+It is also not clear how are pipelines realised with this design
+(if at all).
+
+<a name="api-reference"></a>
+## Reference
+
+The [High-Level](#high-level-api) page documents all public types.
+
+## Acknowledgement
+
+Acknowledgement to people that helped shape Boost.Redis
+
+* Richard Hodges ([madmongo1](https://github.com/madmongo1)): For very helpful support with Asio, the design of asynchronous programs, etc.
+* Vinícius dos Santos Oliveira ([vinipsmaker](https://github.com/vinipsmaker)): For useful discussion about how Boost.Redis consumes buffers in the read operation.
+* Petr Dannhofer ([Eddie-cz](https://github.com/Eddie-cz)): For helping me understand how the `AUTH` and `HELLO` command can influence each other.
+* Mohammad Nejati ([ashtum](https://github.com/ashtum)): For pointing out scenarios where calls to `async_exec` should fail when the connection is lost.
+* Klemens Morgenstern ([klemens-morgenstern](https://github.com/klemens-morgenstern)): For useful discussion about timeouts, cancellation, synchronous interfaces and general help with Asio.
+* Vinnie Falco ([vinniefalco](https://github.com/vinniefalco)): For general suggestions about how to improve the code and the documentation.
+* Bram Veldhoen ([bveldhoen](https://github.com/bveldhoen)): For contributing a Redis-streams example.
+
+Also many thanks to all individuals that participated in the Boost
+review
+
+* Zach Laine: https://lists.boost.org/Archives/boost/2023/01/253883.php
+* Vinnie Falco: https://lists.boost.org/Archives/boost/2023/01/253886.php
+* Christian Mazakas: https://lists.boost.org/Archives/boost/2023/01/253900.php
+* Ruben Perez: https://lists.boost.org/Archives/boost/2023/01/253915.php
+* Dmitry Arkhipov: https://lists.boost.org/Archives/boost/2023/01/253925.php
+* Alan de Freitas: https://lists.boost.org/Archives/boost/2023/01/253927.php
+* Mohammad Nejati: https://lists.boost.org/Archives/boost/2023/01/253929.php
+* Sam Hartsfield: https://lists.boost.org/Archives/boost/2023/01/253931.php
+* Miguel Portilla: https://lists.boost.org/Archives/boost/2023/01/253935.php
+* Robert A.H. Leahy: https://lists.boost.org/Archives/boost/2023/01/253928.php
+
+The Reviews can be found at:
+https://lists.boost.org/Archives/boost/2023/01/date.php. The thread
+with the ACCEPT from the review manager can be found here:
+https://lists.boost.org/Archives/boost/2023/01/253944.php.
+
+## Changelog
+
+### develop
+
+* Deprecates the `async_receive` overload that takes a response. Users
+  should now first call `set_receive_response` to avoid constantly and
+  unnecessarily setting the same response.
+
+* Uses `std::function` to type erase the response adapter. This change
+  should not influence users in any way but allowed important
+  simplification in the connections internals. This resulted in
+  massive performance improvement.
+
+* The connection has a new member `get_usage()` that returns the
+  connection usage information, such as number of bytes written,
+  received etc.
+
+* There are massive performance improvements in the consuming of
+  server pushes which are now communicated with an `asio::channel` and
+  therefore can be buffered which avoids blocking the socket read-loop.
+  Batch reads are also supported by means of `channel.try_send` and
+  buffered messages can be consumed synchronously with
+  `connection::receive`. The function `boost::redis::cancel_one` has
+  been added to simplify processing multiple server pushes contained
+  in the same `generic_response`.  *IMPORTANT*: These changes may
+  result in more than one push in the response when
+  `connection::async_receive` resumes. The user must therefore be
+  careful when calling `resp.clear()`: either ensure that all message
+  have been processed or just use `consume_one`.
+
+### v1.4.2 (incorporates changes to conform the boost review and more)
+
+* Adds `boost::redis::config::database_index` to make it possible to
+  choose a database before starting running commands e.g. after an
+  automatic reconnection.
+
+* Massive performance improvement. One of my tests went from
+  140k req/s to 390k/s. This was possible after a parser
+  simplification that reduced the number of reschedules and buffer
+  rotations.
+
+* Adds Redis stream example.
+
+* Renames the project to Boost.Redis and moves the code into namespace
+  `boost::redis`.
+
+* As pointed out in the reviews the `to_bulk` and `from_bulk` names were too
+  generic for ADL customization points. They gained the prefix `boost_redis_`.
+
+* Moves `boost::redis::resp3::request` to `boost::redis::request`.
+
+* Adds new typedef `boost::redis::response` that should be used instead of
+  `std::tuple`.
+
+* Adds new typedef `boost::redis::generic_response` that should be used instead
+  of `std::vector<resp3::node<std::string>>`.
+
+* Renames `redis::ignore` to `redis::ignore_t`.
+
+* Changes `async_exec` to receive a `redis::response` instead of an adapter,
+  namely, instead of passing `adapt(resp)` users should pass `resp` directly.
+
+* Introduces `boost::redis::adapter::result` to store responses to commands
+  including possible resp3 errors without losing the error diagnostic part. To
+  access values now use `std::get<N>(resp).value()` instead of
+  `std::get<N>(resp)`.
+
+* Implements full-duplex communication. Before these changes the connection
+  would wait for a response to arrive before sending the next one. Now requests
+  are continuously coalesced and written to the socket. `request::coalesce`
+  became unnecessary and was removed. I could measure significative performance
+  gains with theses changes.
+
+* Improves serialization examples using Boost.Describe to serialize to JSON and protobuf. See
+  cpp20_json.cpp and cpp20_protobuf.cpp for more details.
+
+* Upgrades to Boost 1.81.0.
+
+* Fixes build with libc++.
+
+* Adds high-level functionality to the connection classes. For
+  example, `boost::redis::connection::async_run` will automatically
+  resolve, connect, reconnect and perform health checks.
+
+### v1.4.0-1
+
+* Renames `retry_on_connection_lost` to `cancel_if_unresponded`.  (v1.4.1)
+* Removes dependency on Boost.Hana, `boost::string_view`, Boost.Variant2 and Boost.Spirit.
+* Fixes build and setup CI on windows.
+
+### v1.3.0-1
+
+* Upgrades to Boost 1.80.0
+
+* Removes automatic sending of the `HELLO` command. This can't be
+  implemented properly without bloating the connection class. It is
+  now a user responsibility to send HELLO. Requests that contain it have
+  priority over other requests and will be moved to the front of the
+  queue, see `aedis::request::config` 
+
+* Automatic name resolving and connecting have been removed from
+  `aedis::connection::async_run`. Users have to do this step manually
+  now. The reason for this change is that having them built-in doesn't
+  offer enough flexibility that is need for boost users.
+
+* Removes healthy checks and idle timeout. This functionality must now
+  be implemented by users, see the examples. This is
+  part of making Aedis useful to a larger audience and suitable for
+  the Boost review process.
+
+* The `aedis::connection` is now using a typeddef to a
+  `net::ip::tcp::socket` and  `aedis::ssl::connection` to
+  `net::ssl::stream<net::ip::tcp::socket>`.  Users that need to use
+  other stream type must now specialize `aedis::basic_connection`.
+
+* Adds a low level example of async code.
+
+### v1.2.0
+
+* `aedis::adapt` supports now tuples created with `std::tie`.
+  `aedis::ignore` is now an alias to the type of `std::ignore`.
+
+* Provides allocator support for the internal queue used in the
+  `aedis::connection` class.
+
+* Changes the behaviour of `async_run` to complete with success if
+  asio::error::eof is received. This makes it easier to  write
+  composed operations with awaitable operators.
+
+* Adds allocator support in the `aedis::request` (a
+  contribution from Klemens Morgenstern).
+
+* Renames `aedis::request::push_range2` to `push_range`. The
+  suffix 2 was used for disambiguation. Klemens fixed it with SFINAE.
+
+* Renames `fail_on_connection_lost` to
+  `aedis::request::config::cancel_on_connection_lost`. Now, it will
+  only cause connections to be canceled when `async_run` completes.
+
+* Introduces `aedis::request::config::cancel_if_not_connected` which will
+  cause a request to be canceled if `async_exec` is called before a
+  connection has been established.
+
+* Introduces new request flag `aedis::request::config::retry` that if
+  set to true will cause the request to not be canceled when it was
+  sent to Redis but remained unresponded after `async_run` completed.
+  It provides a way to avoid executing commands twice.
+
+* Removes the `aedis::connection::async_run` overload that takes
+  request and adapter as parameters.
+
+* Changes the way `aedis::adapt()` behaves with
+  `std::vector<aedis::resp3::node<T>>`. Receiving RESP3 simple errors,
+  blob errors or null won't causes an error but will be treated as
+  normal response.  It is the user responsibility to check the content
+  in the vector.
+
+* Fixes a bug in `connection::cancel(operation::exec)`. Now this
+  call will only cancel non-written requests.
+
+* Implements per-operation implicit cancellation support for
+  `aedis::connection::async_exec`. The following call will `co_await (conn.async_exec(...) || timer.async_wait(...))`
+  will cancel the request as long as it has not been written.
+
+* Changes `aedis::connection::async_run` completion signature to
+  `f(error_code)`. This is how is was in the past, the second
+  parameter was not helpful.
+
+* Renames `operation::receive_push` to `aedis::operation::receive`.
+
+### v1.1.0-1
+
+* Removes `coalesce_requests` from the `aedis::connection::config`, it
+  became a request property now, see `aedis::request::config::coalesce`.
+
+* Removes `max_read_size` from the `aedis::connection::config`. The maximum
+  read size can be specified now as a parameter of the
+  `aedis::adapt()` function.
+
+* Removes `aedis::sync` class, see intro_sync.cpp for how to perform
+  synchronous and thread safe calls. This is possible in Boost. 1.80
+  only as it requires `boost::asio::deferred`. 
+
+* Moves from `boost::optional` to `std::optional`. This is part of
+  moving to C++17.
+
+* Changes the behaviour of the second `aedis::connection::async_run` overload
+  so that it always returns an error when the connection is lost.
+
+* Adds TLS support, see intro_tls.cpp.
+
+* Adds an example that shows how to resolve addresses over sentinels,
+  see subscriber_sentinel.cpp.
+
+* Adds a `aedis::connection::timeouts::resp3_handshake_timeout`. This is
+  timeout used to send the `HELLO` command.
+
+* Adds `aedis::endpoint` where in addition to host and port, users can
+  optionally provide username, password and the expected server role
+  (see `aedis::error::unexpected_server_role`).
+
+* `aedis::connection::async_run` checks whether the server role received in
+  the hello command is equal to the expected server role specified in
+  `aedis::endpoint`. To skip this check let the role variable empty.
+
+* Removes reconnect functionality from `aedis::connection`. It
+  is possible in simple reconnection strategies but bloats the class
+  in more complex scenarios, for example, with sentinel,
+  authentication and TLS. This is trivial to implement in a separate
+  coroutine. As a result the `enum event` and `async_receive_event`
+  have been removed from the class too.
+
+* Fixes a bug in `connection::async_receive_push` that prevented
+  passing any response adapter other that `adapt(std::vector<node>)`.
+
+* Changes the behaviour of `aedis::adapt()` that caused RESP3 errors
+  to be ignored. One consequence of it is that `connection::async_run`
+  would not exit with failure in servers that required authentication.
+
+* Changes the behaviour of `connection::async_run` that would cause it
+  to complete with success when an error in the
+  `connection::async_exec` occurred.
+
+* Ports the buildsystem from autotools to CMake.
+
+### v1.0.0
+
+* Adds experimental cmake support for windows users.
+
+* Adds new class `aedis::sync` that wraps an `aedis::connection` in
+  a thread-safe and synchronous API.  All free functions from the
+  `sync.hpp` are now member functions of `aedis::sync`.
+
+* Split `aedis::connection::async_receive_event` in two functions, one
+  to receive events and another for server side pushes, see
+  `aedis::connection::async_receive_push`.
+
+* Removes collision between `aedis::adapter::adapt` and
+  `aedis::adapt`.
+
+* Adds `connection::operation` enum to replace `cancel_*` member
+  functions with a single cancel function that gets the operations
+  that should be cancelled as argument.
+
+* Bugfix: a bug on reconnect from a state where the `connection` object
+  had unsent commands. It could cause `async_exec` to never
+  complete under certain conditions.
+
+* Bugfix: Documentation of `adapt()` functions were missing from
+  Doxygen.
+
+### v0.3.0
+
+* Adds `experimental::exec` and `receive_event` functions to offer a
+  thread safe and synchronous way of executing requests across
+  threads. See `intro_sync.cpp` and `subscriber_sync.cpp` for
+  examples.
+
+* `connection::async_read_push` was renamed to `async_receive_event`.
+
+* `connection::async_receive_event` is now being used to communicate
+  internal events to the user, such as resolve, connect, push etc. For
+  examples see cpp20_subscriber.cpp and `connection::event`.
+
+* The `aedis` directory has been moved to `include` to look more
+  similar to Boost libraries. Users should now replace `-I/aedis-path`
+  with `-I/aedis-path/include` in the compiler flags.
+
+* The `AUTH` and `HELLO` commands are now sent automatically. This change was
+  necessary to implement reconnection. The username and password
+  used in `AUTH` should be provided by the user on
+  `connection::config`.
+
+* Adds support for reconnection. See `connection::enable_reconnect`.
+
+* Fixes a bug in the `connection::async_run(host, port)` overload
+  that was causing crashes on reconnection.
+
+* Fixes the executor usage in the connection class. Before theses
+  changes it was imposing `any_io_executor` on users.
+
+* `connection::async_receiver_event` is not cancelled anymore when
+  `connection::async_run` exits. This change makes user code simpler.
+
+* `connection::async_exec` with host and port overload has been
+  removed. Use the other `connection::async_run` overload.
+
+* The host and port parameters from `connection::async_run` have been
+  move to `connection::config` to better support authentication and
+  failover.
+
+* Many simplifications in the `chat_room` example.
+
+* Fixes build in clang the compilers and makes some improvements in
+  the documentation.
+
+### v0.2.0-1
+
+* Fixes a bug that happens on very high load. (v0.2.1) 
+* Major rewrite of the high-level API. There is no more need to use the low-level API anymore.
+* No more callbacks: Sending requests follows the ASIO asynchronous model.
+* Support for reconnection: Pending requests are not canceled when a connection is lost and are re-sent when a new one is established.
+* The library is not sending HELLO-3 on user behalf anymore. This is important to support AUTH properly.
+
+### v0.1.0-2
+
+* Adds reconnect coroutine in the `echo_server` example. (v0.1.2)
+* Corrects `client::async_wait_for_data` with `make_parallel_group` to launch operation. (v0.1.2)
+* Improvements in the documentation. (v0.1.2)
+* Avoids dynamic memory allocation in the client class after reconnection. (v0.1.2)
+* Improves the documentation and adds some features to the high-level client. (v.0.1.1)
+* Improvements in the design and documentation.
+
+### v0.0.1
+
+* First release to collect design feedback.
+

aedis/adapter/adapt.hpp

@@ -1,82 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_ADAPTER_ADAPT_HPP
-#define AEDIS_ADAPTER_ADAPT_HPP
-
-#include <aedis/adapter/detail/response_traits.hpp>
-
-namespace aedis {
-namespace adapter {
-
-template <class T>
-using adapter_t = typename detail::adapter_t<T>;
-
-/** \brief Creates a dummy response adapter.
-    \ingroup any
-  
-    The adapter returned by this function ignores responses. It is
-    useful to avoid wasting time with responses which are not needed.
-
-    Example:
-
-    @code
-    // Pushes and writes some commands to the server.
-    sr.push(command::hello, 3);
-    sr.push(command::ping);
-    sr.push(command::quit);
-    net::write(socket, net::buffer(request));
-
-    // Ignores all responses except for the response to ping.
-    std::string buffer;
-    resp3::read(socket, dynamic_buffer(buffer), adapt());     // hello
-    resp3::read(socket, dynamic_buffer(buffer), adapt(resp)); // ping
-    resp3::read(socket, dynamic_buffer(buffer, adapt()));     // quit
-    @endcode
- */
-inline
-auto adapt() noexcept
-   { return detail::response_traits<void>::adapt(); }
-
-/** \brief Adapts user data to read operations.
- *  \ingroup any
- *
- *  STL containers, \c std::tuple and built-in types are supported and
- *  can be used in conjunction with \c boost::optional<T>.
- *
- *  Example usage:
- *
- *  @code
- *  std::unordered_map<std::string, std::string> cont;
- *  co_await async_read(socket, buffer, adapt(cont));
- *  @endcode
- * 
- *  For a transaction
- *
- *  @code
- *  sr.push(command::multi);
- *  sr.push(command::ping, ...);
- *  sr.push(command::incr, ...);
- *  sr.push_range(command::rpush, ...);
- *  sr.push(command::lrange, ...);
- *  sr.push(command::incr, ...);
- *  sr.push(command::exec);
- *
- *  co_await async_write(socket, buffer(request));
- *
- *  // Reads the response to a transaction
- *  std::tuple<std::string, int, int, std::vector<std::string>, int> execs;
- *  co_await resp3::async_read(socket, dynamic_buffer(buffer), adapt(execs));
- *  @endcode
- */
-template<class T>
-auto adapt(T& t) noexcept
-   { return detail::response_traits<T>::adapt(t); }
-
-} // adapter
-} // aedis
-
-#endif // AEDIS_ADAPTER_ADAPT_HPP

aedis/adapter/detail/adapters.hpp

@@ -1,428 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_ADAPTER_ADAPTERS_HPP
-#define AEDIS_ADAPTER_ADAPTERS_HPP
-
-#include <set>
-#include <unordered_set>
-#include <forward_list>
-#include <system_error>
-#include <map>
-#include <unordered_map>
-#include <list>
-#include <deque>
-#include <vector>
-#include <array>
-
-#include <boost/assert.hpp>
-#include <boost/optional.hpp>
-#include <boost/spirit/include/qi.hpp>
-#include <boost/spirit/home/x3.hpp>
-#include <boost/utility/string_view.hpp>
-
-#include <aedis/resp3/type.hpp>
-#include <aedis/resp3/detail/parser.hpp>
-#include <aedis/generic/serializer.hpp>
-#include <aedis/resp3/node.hpp>
-#include <aedis/adapter/error.hpp>
-
-namespace aedis {
-namespace adapter {
-namespace detail {
-
-double
-parse_double(
-   char const* data,
-   std::size_t size,
-   boost::system::error_code& ec)
-{
-   static constexpr boost::spirit::x3::real_parser<double> p{};
-   double ret;
-   if (!parse(data, data + size, p, ret))
-      ec = error::not_a_double;
-
-   return ret;
-}
-
-// Serialization.
-
-template <class T>
-typename std::enable_if<std::is_integral<T>::value, void>::type
-from_string(
-   T& i,
-   boost::string_view sv,
-   boost::system::error_code& ec)
-{
-   i = resp3::detail::parse_uint(sv.data(), sv.size(), ec);
-}
-
-void from_string(
-   bool& t,
-   boost::string_view sv,
-   boost::system::error_code& ec)
-{
-   t = *sv.data() == 't';
-}
-
-void from_string(
-   double& d,
-   boost::string_view sv,
-   boost::system::error_code& ec)
-{
-   d = parse_double(sv.data(), sv.size(), ec);
-}
-
-template <class CharT, class Traits, class Allocator>
-void
-from_string(
-   std::basic_string<CharT, Traits, Allocator>& s,
-   boost::string_view sv,
-   boost::system::error_code&)
-{
-  s.append(sv.data(), sv.size());
-}
-
-//================================================
-
-void set_on_resp3_error(resp3::type t, boost::system::error_code& ec)
-{
-   switch (t) {
-      case resp3::type::simple_error: ec = adapter::error::simple_error; return;
-      case resp3::type::blob_error: ec = adapter::error::blob_error; return;
-      case resp3::type::null: ec = adapter::error::null; return;
-      default: return;
-   }
-}
-
-template <class Result>
-class general_aggregate {
-private:
-   Result* result_;
-
-public:
-   general_aggregate(Result* c = nullptr): result_(c) {}
-   void operator()(resp3::node<boost::string_view> const& n, boost::system::error_code&)
-   {
-      result_->push_back({n.data_type, n.aggregate_size, n.depth, std::string{std::cbegin(n.value), std::cend(n.value)}});
-   }
-};
-
-template <class Node>
-class general_simple {
-private:
-   Node* result_;
-
-public:
-   general_simple(Node* t = nullptr) : result_(t) {}
-
-   void operator()(resp3::node<boost::string_view> const& n, boost::system::error_code&)
-   {
-     result_->data_type = n.data_type;
-     result_->aggregate_size = n.aggregate_size;
-     result_->depth = n.depth;
-     result_->value.assign(n.value.data(), n.value.size());
-   }
-};
-
-template <class Result>
-class simple_impl {
-public:
-   void on_value_available(Result&) {}
-
-   void
-   operator()(
-      Result& result,
-      resp3::node<boost::string_view> const& n,
-      boost::system::error_code& ec)
-   {
-      set_on_resp3_error(n.data_type, ec);
-      if (ec)
-         return;
-
-      if (is_aggregate(n.data_type)) {
-         ec = adapter::error::expects_simple_type;
-         return;
-      }
-
-      from_string(result, n.value, ec);
-   }
-};
-
-template <class Result>
-class set_impl {
-private:
-   typename Result::iterator hint_;
-
-public:
-   void on_value_available(Result& result)
-      { hint_ = std::end(result); }
-
-   void
-   operator()(
-      Result& result,
-      resp3::node<boost::string_view> const& nd,
-      boost::system::error_code& ec)
-   {
-      set_on_resp3_error(nd.data_type, ec);
-      if (ec)
-         return;
-
-      if (is_aggregate(nd.data_type)) {
-         if (nd.data_type != resp3::type::set)
-            ec = error::expects_set_type;
-         return;
-      }
-
-      BOOST_ASSERT(nd.aggregate_size == 1);
-
-      if (nd.depth < 1) {
-	 ec = adapter::error::expects_set_type;
-	 return;
-      }
-
-      typename Result::key_type obj;
-      from_string(obj, nd.value, ec);
-      hint_ = result.insert(hint_, std::move(obj));
-   }
-};
-
-template <class Result>
-class map_impl {
-private:
-   typename Result::iterator current_;
-   bool on_key_ = true;
-
-public:
-   void on_value_available(Result& result)
-      { current_ = std::end(result); }
-
-   void
-   operator()(
-      Result& result,
-      resp3::node<boost::string_view> const& nd,
-      boost::system::error_code& ec)
-   {
-      set_on_resp3_error(nd.data_type, ec);
-      if (ec)
-         return;
-
-      if (is_aggregate(nd.data_type)) {
-         if (element_multiplicity(nd.data_type) != 2)
-           ec = error::expects_map_type;
-         return;
-      }
-
-      BOOST_ASSERT(nd.aggregate_size == 1);
-
-      if (nd.depth < 1) {
-	 ec = adapter::error::expects_map_type;
-	 return;
-      }
-
-      if (on_key_) {
-         typename Result::key_type obj;
-         from_string(obj, nd.value, ec);
-         current_ = result.insert(current_, {std::move(obj), {}});
-      } else {
-         typename Result::mapped_type obj;
-         from_string(obj, nd.value, ec);
-         current_->second = std::move(obj);
-      }
-
-      on_key_ = !on_key_;
-   }
-};
-
-template <class Result>
-class vector_impl {
-public:
-   void on_value_available(Result& ) { }
-
-   void
-   operator()(
-      Result& result,
-      resp3::node<boost::string_view> const& nd,
-      boost::system::error_code& ec)
-   {
-      set_on_resp3_error(nd.data_type, ec);
-      if (ec)
-         return;
-
-      if (is_aggregate(nd.data_type)) {
-         auto const m = element_multiplicity(nd.data_type);
-         result.reserve(result.size() + m * nd.aggregate_size);
-      } else {
-         result.push_back({});
-         from_string(result.back(), nd.value, ec);
-      }
-   }
-};
-
-template <class Result>
-class array_impl {
-private:
-   int i_ = -1;
-
-public:
-   void on_value_available(Result& ) { }
-
-   void
-   operator()(
-      Result& result,
-      resp3::node<boost::string_view> const& nd,
-      boost::system::error_code& ec)
-   {
-      set_on_resp3_error(nd.data_type, ec);
-      if (ec)
-         return;
-
-      if (is_aggregate(nd.data_type)) {
-	 if (i_ != -1) {
-            ec = adapter::error::nested_aggregate_unsupported;
-            return;
-         }
-
-         if (result.size() != nd.aggregate_size * element_multiplicity(nd.data_type)) {
-            ec = error::incompatible_size;
-            return;
-         }
-      } else {
-         if (i_ == -1) {
-            ec = adapter::error::expects_aggregate_type;
-            return;
-         }
-
-         BOOST_ASSERT(nd.aggregate_size == 1);
-         from_string(result.at(i_), nd.value, ec);
-      }
-
-      ++i_;
-   }
-};
-
-template <class Result>
-struct list_impl {
-
-   void on_value_available(Result& ) { }
-
-   void
-   operator()(
-      Result& result,
-      resp3::node<boost::string_view> const& nd,
-      boost::system::error_code& ec)
-   {
-      set_on_resp3_error(nd.data_type, ec);
-      if (ec)
-         return;
-
-      if (!is_aggregate(nd.data_type)) {
-        BOOST_ASSERT(nd.aggregate_size == 1);
-        if (nd.depth < 1) {
-           ec = adapter::error::expects_aggregate_type;
-           return;
-        }
-
-        result.push_back({});
-        from_string(result.back(), nd.value, ec);
-      }
-   }
-};
-
-//---------------------------------------------------
-
-template <class T>
-struct impl_map { using type = simple_impl<T>; };
-
-template <class Key, class Compare, class Allocator>
-struct impl_map<std::set<Key, Compare, Allocator>> { using type = set_impl<std::set<Key, Compare, Allocator>>; };
-
-template <class Key, class Compare, class Allocator>
-struct impl_map<std::multiset<Key, Compare, Allocator>> { using type = set_impl<std::multiset<Key, Compare, Allocator>>; };
-
-template <class Key, class Hash, class KeyEqual, class Allocator>
-struct impl_map<std::unordered_set<Key, Hash, KeyEqual, Allocator>> { using type = set_impl<std::unordered_set<Key, Hash, KeyEqual, Allocator>>; };
-
-template <class Key, class Hash, class KeyEqual, class Allocator>
-struct impl_map<std::unordered_multiset<Key, Hash, KeyEqual, Allocator>> { using type = set_impl<std::unordered_multiset<Key, Hash, KeyEqual, Allocator>>; };
-
-template <class Key, class T, class Compare, class Allocator>
-struct impl_map<std::map<Key, T, Compare, Allocator>> { using type = map_impl<std::map<Key, T, Compare, Allocator>>; };
-
-template <class Key, class T, class Compare, class Allocator>
-struct impl_map<std::multimap<Key, T, Compare, Allocator>> { using type = map_impl<std::multimap<Key, T, Compare, Allocator>>; };
-
-template <class Key, class Hash, class KeyEqual, class Allocator>
-struct impl_map<std::unordered_map<Key, Hash, KeyEqual, Allocator>> { using type = map_impl<std::unordered_map<Key, Hash, KeyEqual, Allocator>>; };
-
-template <class Key, class Hash, class KeyEqual, class Allocator>
-struct impl_map<std::unordered_multimap<Key, Hash, KeyEqual, Allocator>> { using type = map_impl<std::unordered_multimap<Key, Hash, KeyEqual, Allocator>>; };
-
-template <class T, class Allocator>
-struct impl_map<std::vector<T, Allocator>> { using type = vector_impl<std::vector<T, Allocator>>; };
-
-template <class T, std::size_t N>
-struct impl_map<std::array<T, N>> { using type = array_impl<std::array<T, N>>; };
-
-template <class T, class Allocator>
-struct impl_map<std::list<T, Allocator>> { using type = list_impl<std::list<T, Allocator>>; };
-
-template <class T, class Allocator>
-struct impl_map<std::deque<T, Allocator>> { using type = list_impl<std::deque<T, Allocator>>; };
-
-//---------------------------------------------------
-
-template <class Result>
-class wrapper {
-private:
-   Result* result_;
-   typename impl_map<Result>::type impl_;
-
-public:
-   wrapper(Result* t = nullptr) : result_(t)
-      { impl_.on_value_available(*result_); }
-
-   void
-   operator()(
-      resp3::node<boost::string_view> const& nd,
-      boost::system::error_code& ec)
-   {
-      BOOST_ASSERT(result_);
-      impl_(*result_, nd, ec);
-   }
-};
-
-template <class T>
-class wrapper<boost::optional<T>> {
-private:
-   boost::optional<T>* result_;
-   typename impl_map<T>::type impl_;
-
-public:
-   wrapper(boost::optional<T>* o = nullptr) : result_(o), impl_{} {}
-
-   void
-   operator()(
-      resp3::node<boost::string_view> const& nd,
-      boost::system::error_code& ec)
-   {
-      if (nd.data_type == resp3::type::null)
-         return;
-
-      if (!result_->has_value()) {
-        *result_ = T{};
-        impl_.on_value_available(result_->value());
-      }
-
-      impl_(result_->value(), nd, ec);
-   }
-};
-
-} // detail
-} // adapter
-} // aedis
-
-#endif // AEDIS_ADAPTER_ADAPTERS_HPP

aedis/adapter/detail/response_traits.hpp

@@ -1,161 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_ADAPTER_RESPONSE_TRAITS_HPP
-#define AEDIS_ADAPTER_RESPONSE_TRAITS_HPP
-
-#include <vector>
-#include <tuple>
-
-#include <boost/mp11.hpp>
-#include <boost/variant2.hpp>
-
-#include <aedis/resp3/type.hpp>
-#include <aedis/resp3/read.hpp>
-#include <aedis/adapter/detail/adapters.hpp>
-#include <aedis/adapter/error.hpp>
-
-namespace aedis {
-namespace adapter {
-namespace detail {
-
-/* Traits class for response objects.
- *
- * Provides traits for all supported response types i.e. all STL
- * containers and C++ buil-in types.
- */
-template <class ResponseType>
-struct response_traits
-{
-   using adapter_type = adapter::detail::wrapper<ResponseType>;
-   static auto adapt(ResponseType& r) noexcept { return adapter_type{&r}; }
-};
-
-template <class T>
-using adapter_t = typename response_traits<T>::adapter_type;
-
-template <class T>
-struct response_traits<resp3::node<T>>
-{
-   using response_type = resp3::node<T>;
-   using adapter_type = adapter::detail::general_simple<response_type>;
-   static auto adapt(response_type& v) noexcept { return adapter_type{&v}; }
-};
-
-template <class String, class Allocator>
-struct response_traits<std::vector<resp3::node<String>, Allocator>>
-{
-   using response_type = std::vector<resp3::node<String>, Allocator>;
-   using adapter_type = adapter::detail::general_aggregate<response_type>;
-   static auto adapt(response_type& v) noexcept { return adapter_type{&v}; }
-};
-
-template <>
-struct response_traits<void>
-{
-   using response_type = void;
-   using adapter_type = resp3::detail::ignore_response;
-   static auto adapt() noexcept { return adapter_type{}; }
-};
-
-namespace detail {
-
-// Duplicated here to avoid circular include dependency.
-template<class T>
-auto internal_adapt(T& t) noexcept
-   { return response_traits<T>::adapt(t); }
-
-template <std::size_t N>
-struct assigner {
-  template <class T1, class T2>
-  static void assign(T1& dest, T2& from)
-  {
-     dest[N] = internal_adapt(std::get<N>(from));
-     assigner<N - 1>::assign(dest, from);
-  }
-};
-
-template <>
-struct assigner<0> {
-  template <class T1, class T2>
-  static void assign(T1& dest, T2& from)
-  {
-     dest[0] = internal_adapt(std::get<0>(from));
-  }
-};
-
-template <class Tuple>
-class static_aggregate_adapter {
-private:
-   using adapters_array_type = 
-      std::array<
-         boost::mp11::mp_unique<
-            boost::mp11::mp_rename<
-               boost::mp11::mp_transform<
-                  adapter_t, Tuple>,
-                  boost::variant2::variant>>,
-         std::tuple_size<Tuple>::value>;
-
-   std::size_t i_ = 0;
-   std::size_t aggregate_size_ = 0;
-   adapters_array_type adapters_;
-
-public:
-   static_aggregate_adapter(Tuple* r = nullptr)
-   {
-      detail::assigner<std::tuple_size<Tuple>::value - 1>::assign(adapters_, *r);
-   }
-
-   void count(resp3::node<boost::string_view> const& nd)
-   {
-      if (nd.depth == 1) {
-         if (is_aggregate(nd.data_type))
-            aggregate_size_ = element_multiplicity(nd.data_type) * nd.aggregate_size;
-         else
-            ++i_;
-
-         return;
-      }
-
-      if (--aggregate_size_ == 0)
-         ++i_;
-   }
-
-   void
-   operator()(
-      resp3::node<boost::string_view> const& nd,
-      boost::system::error_code& ec)
-   {
-      using boost::variant2::visit;
-
-      if (nd.depth == 0) {
-         auto const real_aggr_size = nd.aggregate_size * element_multiplicity(nd.data_type);
-         if (real_aggr_size != std::tuple_size<Tuple>::value)
-	    ec = error::incompatible_size;
-
-         return;
-      }
-
-      visit([&](auto& arg){arg(nd, ec);}, adapters_[i_]);
-      count(nd);
-   }
-};
-
-} // detail
-
-template <class... Ts>
-struct response_traits<std::tuple<Ts...>>
-{
-   using response_type = std::tuple<Ts...>;
-   using adapter_type = detail::static_aggregate_adapter<response_type>;
-   static auto adapt(response_type& r) noexcept { return adapter_type{&r}; }
-};
-
-} // detail
-} // adapter
-} // aedis
-
-#endif // AEDIS_ADAPTER_RESPONSE_TRAITS_HPP

aedis/adapter/error.hpp

@@ -1,66 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_ADAPTER_ERROR_HPP
-#define AEDIS_ADAPTER_ERROR_HPP
-
-#include <system_error>
-
-namespace aedis {
-namespace adapter {
-
-/** \brief Adapter errors.
- *  \ingroup any
- */
-enum class error
-{
-   /// Expects a simple RESP3 type but got an aggregate.
-   expects_simple_type = 1,
-
-   /// Expects aggregate type.
-   expects_aggregate_type,
-
-   /// Expects a map but got other aggregate.
-   expects_map_type,
-
-   /// Expects a set aggregate but got something else.
-   expects_set_type,
-
-   /// Nested response not supported.
-   nested_aggregate_unsupported,
-
-   /// Got RESP3 simple error.
-   simple_error,
-
-   /// Got RESP3 blob_error.
-   blob_error,
-
-   /// Aggregate container has incompatible size.
-   incompatible_size,
-
-   /// Not a double
-   not_a_double,
-
-   /// Got RESP3 null type.
-   null
-};
-
-/** \brief Creates a error_code object from an error.
- *  \ingroup any
- */
-boost::system::error_code make_error_code(error e);
-
-} // adapter
-} // aedis
-
-namespace std {
-
-template<>
-struct is_error_code_enum<::aedis::adapter::error> : std::true_type {};
-
-} // std
-
-#endif // AEDIS_ADAPTER_ERROR_HPP

aedis/adapter/impl/error.ipp

@@ -1,53 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <system_error>
-#include <boost/assert.hpp>
-
-namespace aedis {
-namespace adapter {
-namespace detail {
-
-struct error_category_impl : boost::system::error_category {
-
-   char const* name() const noexcept override
-   {
-      return "aedis.adapter";
-   }
-
-   std::string message(int ev) const override
-   {
-      switch(static_cast<error>(ev)) {
-	 case error::expects_simple_type: return "Expects a simple RESP3 type.";
-	 case error::expects_aggregate_type: return "Expects aggregate type.";
-	 case error::expects_map_type: return "Expects map type.";
-	 case error::expects_set_type: return "Expects set type.";
-	 case error::nested_aggregate_unsupported: return "Nested aggregate unsupported.";
-	 case error::simple_error: return "Got RESP3 simple-error.";
-	 case error::blob_error: return "Got RESP3 blob-error.";
-	 case error::incompatible_size: return "Aggregate container has incompatible size.";
-	 case error::not_a_double: return "Not a double.";
-	 case error::null: return "Got RESP3 null.";
-	 default: BOOST_ASSERT(false);
-      }
-   }
-};
-
-boost::system::error_category const& category()
-{
-  static error_category_impl instance;
-  return instance;
-}
-
-} // detail
-
-boost::system::error_code make_error_code(error e)
-{
-    return boost::system::error_code{static_cast<int>(e), detail::category()};
-}
-
-} // adapter
-} // aedis

aedis/aedis.hpp

@@ -1,847 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_HPP
-#define AEDIS_HPP
-
-#include <aedis/resp3/read.hpp>
-#include <aedis/adapter/adapt.hpp>
-#include <aedis/adapter/error.hpp>
-#include <aedis/redis/command.hpp>
-#include <aedis/sentinel/command.hpp>
-#include <aedis/generic/error.hpp>
-#include <aedis/generic/client.hpp>
-#include <aedis/generic/serializer.hpp>
-
-/** \mainpage Documentation
-    \tableofcontents
-  
-    \section Overview
-  
-    Aedis is a [Redis](https://redis.io/) client library built on top
-    of [Asio](https://www.boost.org/doc/libs/release/doc/html/boost_asio.html)
-    that provides simple and efficient communication with a Redis
-    server. Some of its distinctive features are
-
-    @li Support for the latest version of the Redis communication protocol [RESP3](https://github.com/redis/redis-specifications/blob/master/protocol/RESP3.md).
-    @li First class support for STL containers and C++ built-in types.
-    @li Serialization and deserialization of your own data types that avoid unnecessary copies.
-    @li Support for Redis [sentinel](https://redis.io/docs/manual/sentinel).
-    @li Sync and async API.
-
-    In addition to that, Aedis provides a high-level client that offers the following functionality
-
-    @li Management of message queues.
-    @li Simplified handling of server pushes.
-    @li Zero asymptotic allocations by means of memory reuse.
-    @li Healthy checks.
-
-    If you are interested in a detailed comparison of Redis clients
-    and the design rationale behind Aedis jump to \ref why-aedis. Now
-    let us have a look at the low-level API.
-
-    \section low-level-api Low-level API
-
-    The low-level API is very useful for tasks that can be performed
-    in short lived connections, for example, assume we want to perform
-    the following steps
-
-    @li Set the value of a Redis key.
-    @li Set the expiration of that key to two seconds.
-    @li Get and return its old value.
-    @li Quit
-
-    The coroutine-based asynchronous implementation of the steps above look like
-
-    @code
-    net::awaitable<std::string> set(net::ip::tcp::endpoint ep)
-    {
-       // To make code less verbose
-       using tcp_socket = net::use_awaitable_t<>::as_default_on_t<net::ip::tcp::socket>;
-
-       tcp_socket socket{co_await net::this_coro::executor};
-       co_await socket.async_connect(ep);
-    
-       std::string buffer, response;
-
-       auto sr = make_serializer(request);
-       sr.push(command::hello, 3);
-       sr.push(command::set, "key", "Value", "EX", "2", "get");
-       sr.push(command::quit);
-       co_await net::async_write(socket, net::buffer(buffer));
-       buffer.clear();
-    
-       auto dbuffer = net::dynamic_buffer(read_buffer);
-       co_await resp3::async_read(socket, dbuffer); // Hello ignored.
-       co_await resp3::async_read(socket, dbuffer, adapt(response)); // Set
-       co_await resp3::async_read(socket, dbuffer); // Quit ignored.
-    
-       co_return response;
-    }
-    @endcode
-
-    The simplicity of the code above makes it self explanatory
-
-    @li Connect to the Redis server.
-    @li Declare a \c std::string to hold the request and add some commands in it with a serializer.
-    @li Write the payload to the socket and read the responses in the same order they were sent.
-    @li Return the response to the user.
-
-    The @c hello command above is always required and must be sent
-    first as it informs we want to communicate over RESP3.
-
-    \subsection requests Requests
-
-    As stated above, requests are created by defining a storage object
-    and a serializer that knows how to convert user data into valid
-    RESP3 wire-format. They are composed of one or more
-    commands (in Redis documentation they are called [pipelines](https://redis.io/topics/pipelining)),
-    which means users can add
-    as many commands to the request as they like, a feature that aids
-    performance.
-
-    The individual commands in a request assume many
-    different forms
-
-    @li With and without keys.
-    @li Variable length arguments.
-    @li Ranges.
-    @li etc.
-
-    To account for all these variations, the \c serializer class
-    offers some member functions, each of them with a couple of
-    overloads, for example
-
-    @code
-    // Some data to send to Redis.
-    std::string value = "some value";
-
-    std::list<std::string> list {"channel1", "channel2", "channel3"};
-
-    std::map<std::string, mystruct> map
-       { {"key1", "value1"}
-       , {"key2", "value2"}
-       , {"key3", "value3"}};
-
-    // Command with no arguments
-    sr.push(command::quit);
-
-    // Command with variable lenght arguments.
-    sr.push(command::set, "key", value, "EX", "2");
-
-    // Sends a container, no key.
-    sr.push_range(command::subscribe, list);
-
-    // Same as above but an iterator range.
-    sr.push_range2(command::subscribe, std::cbegin(list), std::cend(list));
-
-    // Sends a container, with key.
-    sr.push_range(command::hset, "key", map);
-
-    // Same as above but as iterator range.
-    sr.push_range2(command::hset, "key", std::cbegin(map), std::cend(map));
-    @endcode
-
-    Once all commands have been added to the request, we can write it
-    as usual by writing the payload to the socket
-
-    @code
-    co_await net::async_write(socket, buffer(request));
-    @endcode
-
-    \subsubsection requests-serialization Serialization
-
-    The \c send and \c send_range functions above work with integers
-    e.g. \c int and \c std::string out of the box. To send your own
-    data type defined the \c to_bulk function like this
-
-    @code
-    // Example struct.
-    struct mystruct {
-      // ...
-    };
-    
-    void to_bulk(std::string& to, mystruct const& obj)
-    {
-       // Convert to obj string and call to_bulk (see also add_header
-       // and add_separator)
-       auto dummy = "Dummy serializaiton string.";
-       aedis::resp3::to_bulk(to, dummy);
-    }
-
-    std::map<std::string, mystruct> map
-       { {"key1", {...}}
-       , {"key2", {...}}
-       , {"key3", {...}}};
-
-    db.send_range(command::hset, "key", map);
-    @endcode
-
-    It is quite common to store json string in Redis for example.
-
-    \subsection low-level-responses Responses
-
-    To read responses effectively, users must know their RESP3 type,
-    this can be found in the Redis documentation of each command
-    (https://redis.io/commands). For example
-
-    Command  | RESP3 type                          | Documentation
-    ---------|-------------------------------------|--------------
-    lpush    | Number                              | https://redis.io/commands/lpush
-    lrange   | Array                               | https://redis.io/commands/lrange
-    set      | Simple-string, null or blob-string  | https://redis.io/commands/set
-    get      | Blob-string                         | https://redis.io/commands/get
-    smembers | Set                                 | https://redis.io/commands/smembers
-    hgetall  | Map                                 | https://redis.io/commands/hgetall
-
-    Once the RESP3 type of a given response is known we can choose a
-    proper C++ data structure to receive it in. Fortunately, this is a
-    simple task for most types. The table below summarises the options
-
-    RESP3 type     | C++                                                          | Type
-    ---------------|--------------------------------------------------------------|------------------
-    Simple-string  | \c std::string                                             | Simple
-    Simple-error   | \c std::string                                             | Simple
-    Blob-string    | \c std::string, \c std::vector                             | Simple
-    Blob-error     | \c std::string, \c std::vector                             | Simple
-    Number         | `long long`, `int`, `std::size_t`, \c std::string          | Simple
-    Double         | `double`, \c std::string                                   | Simple
-    Null           | `boost::optional<T>`                                       | Simple
-    Array          | \c std::vector, \c std::list, \c std::array, \c std::deque | Aggregate
-    Map            | \c std::vector, \c std::map, \c std::unordered_map         | Aggregate
-    Set            | \c std::vector, \c std::set, \c std::unordered_set         | Aggregate
-    Push           | \c std::vector, \c std::map, \c std::unordered_map         | Aggregate
-
-    Responses that contain nested aggregates or heterogeneous data
-    types will be given special treatment later.  As of this writing,
-    not all RESP3 types are used by the Redis server, which means in
-    practice users will be concerned with a reduced subset of the
-    RESP3 specification. Now let us see some examples
-
-    @code
-    auto dbuffer = dynamic_buffer(buffer);
-
-    // To ignore the response.
-    co_await resp3::async_read(socket, dbuffer, adapt());
-
-    // Read in a std::string e.g. get.
-    std::string str;
-    co_await resp3::async_read(socket, dbuffer, adapt(str));
-
-    // Read in a long long e.g. rpush.
-    long long number;
-    co_await resp3::async_read(socket, dbuffer, adapt(number));
-
-    // Read in a std::set e.g. smembers.
-    std::set<T, U> set;
-    co_await resp3::async_read(socket, dbuffer, adapt(set));
-
-    // Read in a std::map e.g. hgetall.
-    std::map<T, U> set;
-    co_await resp3::async_read(socket, dbuffer, adapt(map));
-
-    // Read in a std::unordered_map e.g. hgetall.
-    std::unordered_map<T, U> umap;
-    co_await resp3::async_read(socket, dbuffer, adapt(umap));
-
-    // Read in a std::vector e.g. lrange.
-    std::vector<T> vec;
-    co_await resp3::async_read(socket, dbuffer, adapt(vec));
-    @endcode
-
-    In other words, it is straightforward, just pass the result of \c
-    adapt to the read function and make sure the response data type is
-    compatible with the data structure you are calling @c adapter(...)
-    with. All standard C++ containers are supported by Aedis.
-
-    \subsubsection Optional
-
-    It is not uncommon for apps to access keys that do not exist or
-    that have already expired in the Redis server, to deal with these
-    cases Aedis provides support for \c boost::optional. To use it,
-    wrap your type around \c boost::optional like this
-
-    @code
-    boost::optional<std::unordered_map<T, U>> umap;
-    co_await resp3::async_read(socket, dynamic_buffer(buffer), adapt(umap));
-    @endcode
-
-    Everything else stays the same, before accessing data, users will
-    have to check or assert the optional contains a value.
-
-    \subsubsection heterogeneous_aggregates Heterogeneous aggregates
-
-    There are cases where Redis returns aggregates that
-    contain heterogeneous data, for example, an array that contains
-    integers, strings nested sets etc. Aedis supports reading such
-    aggregates in a \c std::tuple efficiently as long as the they
-    don't contain 3-order nested aggregates e.g. an array that
-    contains an array of arrays. For example, to read the response to
-    a \c hello command we can use the following response type.
-
-    @code
-    using hello_type = std::tuple<
-       std::string, std::string,
-       std::string, std::string,
-       std::string, int,
-       std::string, int,
-       std::string, std::string,
-       std::string, std::string,
-       std::string, std::vector<std::string>>;
-    @endcode
-
-    Transactions are another example where this feature is useful, for
-    example, the response to the transaction below
-
-    @code
-    db.send(command::multi);
-    db.send(command::get, "key1");
-    db.send(command::lrange, "key2", 0, -1);
-    db.send(command::hgetall, "key3");
-    db.send(command::exec);
-    @endcode
-
-    can be read in the following way
-
-    @code
-    std::tuple<
-       boost::optional<std::string>, // Response to get
-       boost::optional<std::vector<std::string>>, // Response to lrange
-       boost::optional<std::map<std::string, std::string>> // Response to hgetall
-    > trans;
-
-    co_await resp3::async_read(socket, dynamic_buffer(buffer)); // Ignore multi
-    co_await resp3::async_read(socket, dynamic_buffer(buffer)); // Ignore get
-    co_await resp3::async_read(socket, dynamic_buffer(buffer)); // Ignore lrange
-    co_await resp3::async_read(socket, dynamic_buffer(buffer)); // Ignore hgetall
-    co_await resp3::async_read(socket, dynamic_buffer(buffer), adapt(trans));
-    @endcode
-
-    Note that above we are not ignoring the response to the commands
-    themselves but whether they have been successfully queued.  Only
-    after @c exec is received Redis will execute them in sequence and
-    send all responses together in an array.
-
-    \subsubsection Serialization
-
-    As mentioned in \ref requests-serialization, it is common for
-    users to serialized data before sending it to Redis e.g.  json
-    strings, for example
-
-    @code
-    sr.push(command::set, "key", "{"Server": "Redis"}"); // Unquoted for readability.
-    sr.push(command::get, "key")
-    @endcode
-
-    For performance and convenience reasons, we may want to avoid
-    receiving the response to the \c get command above as a string
-    just to convert it later to a e.g. deserialized json. To support
-    this, Aedis calls a user defined \c from_string function while
-    parsing the response. In simple terms, define your type
-
-    @code
-    struct mystruct {
-       // struct fields.
-    };
-    @endcode
-
-    and deserialize it from a string in a function \c from_string with
-    the following signature
-
-    @code
-    void from_string(mystruct& obj, char const* p, std::size_t size, boost::system::error_code& ec)
-    {
-       // Deserializes p into obj.
-    }
-    @endcode
-
-    After that, you can start receiving data efficiently in the desired
-    types e.g. \c mystruct, \c std::map<std::string, mystruct> etc.
-
-    \subsubsection gen-case The general case
-
-    As already mentioned, there are cases where responses to Redis
-    commands won't fit in the model presented above, some examples are
-
-    @li Commands (like \c set) whose response don't have a fixed
-    RESP3 type. Expecting an \c int and receiving a blob-string
-    will result in error.
-    @li RESP3 aggregates that contain nested aggregates can't be read in STL containers.
-    @li Transactions with a dynamic number of commands can't be read in a \c std::tuple.
-
-    To deal with these cases Aedis provides the \c resp3::node
-    type, that is the most general form of an element in a response,
-    be it a simple RESP3 type or an aggregate. It is defined like this
-
-    @code
-    template <class String>
-    struct node {
-       // The RESP3 type of the data in this node.
-       type data_type;
-
-       // The number of elements of an aggregate (or 1 for simple data).
-       std::size_t aggregate_size;
-
-       // The depth of this node in the response tree.
-       std::size_t depth;
-
-       // The actual data. For aggregate types this is always empty.
-       String value;
-    };
-    @endcode
-
-    Any response to a Redis command can be received in a \c
-    std::vector<node<std::string>>.  The vector can be seen as a
-    pre-order view of the response tree
-    (https://en.wikipedia.org/wiki/Tree_traversal#Pre-order,_NLR).
-    Using it is no different that using other types
-
-    @code
-    // Receives any RESP3 simple data type.
-    node<std::string> resp;
-    co_await resp3::async_read(socket, dynamic_buffer(buffer), adapt(resp));
-
-    // Receives any RESP3 simple or aggregate data type.
-    std::vector<node<std::string>> resp;
-    co_await resp3::async_read(socket, dynamic_buffer(buffer), adapt(resp));
-    @endcode
-
-    For example, suppose we want to retrieve a hash data structure
-    from Redis with \c hgetall, some of the options are
-
-    @li \c std::vector<node<std::string>: Works always.
-    @li \c std::vector<std::string>: Efficient and flat, all elements as string.
-    @li \c std::map<std::string, std::string>: Efficient if you need the data as a \c std::map
-    @li \c std::map<U, V>: Efficient if you are storing serialized data. Avoids temporaries and requires \c from_string for \c U and \c V.
-
-    In addition to the above users can also use unordered versions of the containers. The same reasoning also applies to sets e.g. \c smembers.
-
-    \subsubsection low-level-adapters Adapters
-
-    Users that are not satisfied with any of the options above can
-    write their own adapters very easily. For example, the adapter below
-    can be used to print incoming data to the screen.
-
-    @code
-    auto adapter = [](resp3::node<boost::string_view> const& nd, boost::system::error_code&)
-    {
-       std::cout << nd << std::endl;
-    };
-
-    co_await resp3::async_read(socket, dynamic_buffer(buffer), adapter);
-    @endcode
-
-    See more in the \ref examples section.
-
-    \section high-level-api High-level API
-
-    As stated earlier, the low-level API is very useful for tasks that
-    can be performed with short lived connections. Sometimes however,
-    the need for long-lived connections becomes compeling
-
-    @li \b Server \b pushes: Short lived connections can't deal with server pushes, that means no [client side caching](https://redis.io/topics/client-side-caching), [notifications](https://redis.io/topics/notifications) and [pubsub](https://redis.io/topics/pubsub).
-    @li \b Performance: Keep opening and closing connections impact performance serverely.
-    @li \b Pipeline: Code such as shown in \ref low-level-api don't support pipelines well since it can only send a fixed number of commands at time. It misses important optimization opportunities (https://redis.io/topics/pipelining).
-
-    A serious implementation that supports the points listed above is
-    far from trivial and involves many complex asynchronous operations
-
-    @li \c async_resolve: Resolve a hostname.
-    @li \c async_connect: Connect to Redis.
-    @li \c async_read: Performed in a loop as long as the connection lives.
-    @li \c async_write: Performed everytime a new message is added.
-    @li \c async_wait: To timout all operations above if the server becomes unresponsive.
-
-    Notice that many of the operations above will run concurrently with each other and, in addition to that
-
-    @li \c async_write operations require management of the message queue to prevent concurrent writes.
-    @li Healthy checks must be sent periodically by the client to detect a dead or unresponsive server.
-    @li Recovery after a disconnection to avoid loosing enqueued commands.
-
-    Expecting users to implement these points themselves is
-    unrealistic and could result in code that performs poorly and
-    can't handle errors properly.  To avoid all of that, Aedis
-    provides its own implementation. The general form of a program
-    that uses the high-level API looks like this
-
-    @code
-    int main()
-    {
-       net::io_context ioc;
-
-       client_type db(ioc.get_executor());
-       auto recv = std::make_shared<receiver>(db);
-       db.set_receiver(recv);
-
-       db.async_run("127.0.0.1", "6379", [](auto ec){ ... });
-
-       ioc.run();
-    }
-    @endcode
-
-    Users are concerned only with the implementation of the
-    receiver. For example
-
-    @code
-    // Callbacks.
-    struct receiver {
-       void on_resp3(command cmd, node<string_view> const& nd, error_code& ec) { ...  }
-       void on_read(command cmd, std::size_t) { ...  }
-       void on_push(std::size_t n) { }
-       void on_write(std::size_t n) { ... }
-    };
-    @endcode
-
-    The functions in the receiver above are callbacks that will be
-    called when events arrives
-
-    @li \c on_resp3: Called when a new chunk of resp3 data is parsed.
-    @li \c on_read: Called after the response to a command has been successfully read.
-    @li \c on_push: Called when a server push is received.
-    @li \c on_write: Called after a request has been successfully written to the stream.
-
-    The callbacks above are never called on errors, instead the \c
-    async_run function returns. Reconnection is also supported, for
-    example
-
-    @code
-    net::awaitable<void> run(std::shared_ptr<client_type> db)
-    {
-       auto ex = co_await net::this_coro::executor;
-    
-       boost::asio::steady_timer timer{ex};
-    
-       for (error_code ec;;) {
-          co_await db->async_run("127.0.0.1", "6379", redirect_error(use_awaitable, ec));
-
-          // Log the error.
-          std::clog << ec.message() << std::endl;
-    
-          // Wait two seconds and try again.
-          timer.expires_after(std::chrono::seconds{2});
-          co_await timer.async_wait(redirect_error(use_awaitable, ec));
-       }
-    }
-    @endcode
-
-    when reconnecting the client will recover requests that haven't
-    been sent to Redis yet.
-
-    \subsection high-level-sending-cmds Sending commands
-
-    The db object from the example above can be passed around to other
-    objects so that commands can be sent from everywhere in the app.
-    Sending commands is also similar to what has been discussed before
-
-    @code
-    void foo(client<net::ip::tcp::socket>& db)
-    {
-       db.send(command::ping, "O rato roeu a roupa do rei de Roma");
-       db.send(command::incr, "counter");
-       db.send(command::set, "key", "Três pratos de trigo para três tigres");
-       db.send(command::get, "key");
-       ...
-    }
-    @endcode
-
-    The \c send functions in this case will add commands to the output
-    queue and send them only if there is no pending response. This is
-    so because RESP3 is a request/response protocol, which means
-    clients must wait for responses before sending
-    the next request.
-
-    \section examples Examples
-
-    To better fix what has been said above, users should have a look at some simple examples.
-
-    \b Low \b level \b API (sync)
-
-    @li intro_sync.cpp: Synchronous API usage example.
-    @li serialization_sync.cpp: Shows how serialize your own types.
-
-    \b Low \b level \b API (async-coroutine)
-
-    @li subscriber.cpp: Shows how channel subscription works at the low level.
-    @li transaction.cpp: Shows how to read the response to transactions.
-    @li custom_adapter.cpp: Shows how to write a response adapter that prints to the screen, see \ref low-level-adapters.
-
-    \b High \b level \b API (async only)
-
-    @li intro_high_level.cpp: High-level API usage example.
-    @li aggregates_high_level.cpp: Shows how receive RESP3 aggregate data types in a general way or in STL containers.
-    @li subscriber_high_level.cpp: Shows how channel [subscription](https://redis.io/topics/pubsub) works at a high-level.
-
-    \b Asynchronous \b Servers (high-level API)
-
-    @li echo_server.cpp: Shows the basic principles behind asynchronous communication with a database in an asynchronous server.
-    @li chat_room.cpp: Shows how to build a scalable chat room.
-
-    \section using-aedis Using Aedis
-
-    To install and use Aedis you will need
-  
-    - Boost 1.78 or greater.
-    - Unix Shell and Make.
-    - C++14. Some examples require C++20 with coroutine support.
-    - Redis server.
-
-    Some examples will also require interaction with
-  
-    - redis-cli: Used in one example.
-    - Redis Sentinel Server: used in some examples.
-
-    Aedis has been tested with the following compilers
-
-    - Tested with gcc: 7.5.0, 8.4.0, 9.3.0, 10.3.0.
-    - Tested with clang: 11.0.0, 10.0.0, 9.0.1, 8.0.1, 7.0.1.
-  
-    \subsection Installation
-
-    The first thing to do is to download and unpack Aedis
-
-    ```
-    # Download the latest release on github
-    $ wget https://github.com/mzimbres/aedis/releases
-  
-    # Uncompress the tarball and cd into the dir
-    $ tar -xzvf aedis-version.tar.gz
-    ```
-
-    If you can't use \c configure and \c make (e.g. Windows users)
-    you can already add the directory where you unpacked Aedis to the
-    include directories in your project, otherwise run
-  
-    ```
-    # See configure --help for all options.
-    $ ./configure --prefix=/opt/aedis-version --with-boost=/opt/boost_1_78_0
-
-    # Install Aedis in the path specified in --prefix
-    $ sudo make install
-  
-    ```
-  
-    and include the following header 
-  
-    ```cpp
-    #include <aedis/src.hpp>
-
-    ```
-
-    in exactly one source file in your applications. At this point you
-    can start using Aedis. To build the examples and run the tests run
-  
-    ```
-    # Build aedis examples.
-    $ make examples
-  
-    # Test aedis in your machine.
-    $ make check
-    ```
-
-    \subsection Developers
-  
-    To generate the build system run
-  
-    ```
-    $ autoreconf -i
-    ```
-  
-    After that you will have a configure script 
-    that you can run as explained above, for example, to use a
-    compiler other that the system compiler run
-  
-    ```
-    $ CC=/opt/gcc-10.2.0/bin/gcc-10.2.0 CXX=/opt/gcc-10.2.0/bin/g++-10.2.0 CXXFLAGS="-g -Wall -Werror"  ./configure ...
-    $ make distcheck
-    ```
-
-    \section why-aedis Why Aedis
-
-    At the time of this writing there are seventeen Redis clients
-    listed in the [official](https://redis.io/docs/clients/#cpp) list.
-    With so many clients available it is not unlikely that users are
-    asking themselves why yet another one.  In this section I will try
-    to compare Aedis to the most popular clients and why we need
-    Aedis. Notice however that this is ongoing work as comparing
-    client objectively is difficult and time consuming.
-
-    The most popular client at the moment of this writing ranked by
-    github stars is
-
-    @li https://github.com/sewenew/redis-plus-plus
-
-    Before we start it is worth mentioning some of the things it does
-    not support
-
-    @li RESP3. Without RESP3 is impossible to support some important
-    Redis features like client side caching, among other things.
-    @li The Asio asynchronous model.
-    @li Serialization of user data types that avoids temporaries.
-    @li Error handling with error-code and exception overloads.
-    @li Healthy checks.
-    @li Fine control over memory allocation by means of allocators.
-
-    The remaining points will be addressed individually.
-
-    @subsection redis-plus-plus
-
-    Let us first have a look at what sending a command a pipeline and a
-    transaction look like
-
-    @code
-    auto redis = Redis("tcp://127.0.0.1:6379");
-
-    // Send commands
-    redis.set("key", "val");
-    auto val = redis.get("key"); // val is of type OptionalString.
-    if (val)
-        std::cout << *val << std::endl;
-
-    // Sending pipelines
-    auto pipe = redis.pipeline();
-    auto pipe_replies = pipe.set("key", "value")
-                            .get("key")
-                            .rename("key", "new-key")
-                            .rpush("list", {"a", "b", "c"})
-                            .lrange("list", 0, -1)
-                            .exec();
-
-    // Parse reply with reply type and index.
-    auto set_cmd_result = pipe_replies.get<bool>(0);
-    // ...
-
-    // Sending a transaction
-    auto tx = redis.transaction();
-    auto tx_replies = tx.incr("num0")
-                        .incr("num1")
-                        .mget({"num0", "num1"})
-                        .exec();
-
-    auto incr_result0 = tx_replies.get<long long>(0);
-    // ...
-    @endcode
-
-    Some of the problems with this API are
-
-    @li Heterogeneous treatment of commands, pipelines and transaction.
-    @li Having to manually finish the pipeline with \c .exec() is a major source of headache. This is not required by the protocol itself but results from the abstraction used.
-    @li Any Api that sends individual commands has a very restricted scope of usability and should be avoided in anything that needs minimum performance guarantees.
-    @li The API imposes exceptions on users, no error-code overload is provided.
-    @li No control over dynamic allocations.
-    @li No way to reuse the buffer for new calls to e.g. \c redis.get in order to avoid further dynamic memory allocations.
-    @li Error handling of resolve and connection no clear.
-
-    According to the documentation, pipelines in redis-plus-plus have
-    the following characteristics
-
-    > NOTE: By default, creating a Pipeline object is NOT cheap, since
-    > it creates a new connection.
-
-    This is clearly a downside of the API as pipelines should be the
-    default way of communicating and not an exception, paying such a
-    high price for each pipeline imposes a severe cost in performance.
-    Transactions also suffer from the very same problem
-
-    > NOTE: Creating a Transaction object is NOT cheap, since it
-    > creates a new connection.
-
-    In Aedis there is no difference between sending one command, a
-    pipeline or a transaction because creating the request is decoupled
-    from the IO objects, for example
-
-    @code
-    std::string request;
-    auto sr = make_serializer(request);
-    sr.push(command::hello, 3);
-    sr.push(command::multi);
-    sr.push(command::ping, "Some message.");
-    sr.push(command::set, "low-level-key", "some content", "EX", "2");
-    sr.push(command::exec);
-    sr.push(command::ping, "Another message.");
-    net::write(socket, net::buffer(request));
-    @endcode
-
-    The request created above will be sent to Redis in a single
-    pipeline and imposes no restriction on what it contains e.g. the
-    number of commands, transactions etc. The problems mentioned above
-    simply do not exist in Aedis. The way responses are read is
-    also more flexible
-
-    @code
-    std::string buffer;
-    auto dbuffer = net::dynamic_buffer(buffer);
-
-    std::tuple<std::string, boost::optional<std::string>> response;
-    resp3::read(socket, dbuffer); // hellp
-    resp3::read(socket, dbuffer); // multi
-    resp3::read(socket, dbuffer); // ping
-    resp3::read(socket, dbuffer); // set
-    resp3::read(socket, dbuffer, adapt(response));
-    resp3::read(socket, dbuffer); // quit
-    @endcode
-
-    @li The response objects are passed by the caller to the read
-    functions so that he has fine control over memory allocations and
-    object lifetime.
-    @li The user can either use error-code or exceptions.
-    @li Each response can be read individually in the response object
-    avoiding temporaries.
-    @li It is possible to ignore responses.
-
-    This was the blocking API, now let us compare the async interface
-
-    > redis-plus-plus also supports async interface, however, async
-    > support for Transaction and Subscriber is still on the way.
-    > 
-    > The async interface depends on third-party event library, and so
-    > far, only libuv is supported.
-
-    Async code in redis-plus-plus looks like the following
-
-    @code
-    auto async_redis = AsyncRedis(opts, pool_opts);
-    
-    Future<string> ping_res = async_redis.ping();
-    
-    cout << ping_res.get() << endl;
-    @endcode
-
-    As the reader can see, the async interface is based on futures
-    which is also known to have a bad performance.  The biggest
-    problem however with this async design is that it makes it
-    impossible to write asynchronous programs correctly since it
-    starts an async operation on every command sent instead of
-    enqueueing a message and triggering a write. It is also not clear
-    how are pipelines realised with the design (if at all).
-
-    In Aedis the send function looks like this
-
-    @code
-    template <class... Ts>
-    void client::send(Command cmd, Ts const&... args);
-    @endcode
-
-    and the response is delivered through a callback.
-
-    \section Acknowledgement
-
-    Some people that were helpful in the development of Aedis
-
-    @li Richard Hodges ([madmongo1](https://github.com/madmongo1)): For answering pretty much every question I had about Asio and the design of asynchronous programs.
-    @li Vinícius dos Santos Oliveira ([vinipsmaker](https://github.com/vinipsmaker)): For useful discussion about how Aedis consumes buffers in the read operation (among other things).
-
-    \section Reference
-  
-    See \subpage any.
-
- */
-
-/** \defgroup any Reference
- *
- *  This page contains the documentation of all user facing code.
- */
-
-#endif // AEDIS_HPP

aedis/generic/client.hpp

@@ -1,701 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_GENERIC_CLIENT_HPP
-#define AEDIS_GENERIC_CLIENT_HPP
-
-#include <vector>
-#include <limits>
-#include <functional>
-#include <iterator>
-#include <algorithm>
-#include <utility>
-#include <chrono>
-
-#include <boost/asio/ip/tcp.hpp>
-#include <boost/asio/steady_timer.hpp>
-
-#include <aedis/resp3/type.hpp>
-#include <aedis/resp3/node.hpp>
-#include <aedis/redis/command.hpp>
-#include <aedis/generic/detail/client_ops.hpp>
-
-namespace aedis {
-namespace generic {
-
-/** \brief A high level Redis client.
- *  \ingroup any
- *
- *  This class keeps a connection open to the Redis server where
- *  commands can be sent at any time. For more details, please see the
- *  documentation of each individual function.
- */
-template <class AsyncReadWriteStream, class Command>
-class client {
-public:
-   /// Executor type.
-   using executor_type = typename AsyncReadWriteStream::executor_type;
-
-   /// Callback type of read operations.
-   using read_handler_type = std::function<void(Command cmd, std::size_t)>;
-
-   /// Callback type of write operations.
-   using write_handler_type = std::function<void(std::size_t)>;
-
-   /// Callback type of push operations.
-   using push_handler_type = std::function<void(std::size_t)>;
-
-   /// Callback type of resp3 operations.
-   using resp3_handler_type = std::function<void(Command, resp3::node<boost::string_view> const&, boost::system::error_code&)>;
-
-   using default_completion_token_type = boost::asio::default_completion_token_t<executor_type>;
-
-   /** @brief Configuration parameters.
-    */
-   struct config {
-      /// Timeout of the \c async_resolve operation.
-      std::chrono::seconds resolve_timeout = std::chrono::seconds{5};
-
-      /// Timeout of the \c async_connect operation.
-      std::chrono::seconds connect_timeout = std::chrono::seconds{5};
-
-      /// Timeout of the \c async_read operation.
-      std::chrono::seconds read_timeout = std::chrono::seconds{5};
-
-      /// Timeout of the \c async_write operation.
-      std::chrono::seconds write_timeout = std::chrono::seconds{5};
-
-      /// Time after which a connection is considered idle if no data is received.
-      std::chrono::seconds idle_timeout = std::chrono::seconds{10};
-
-      /// The maximum size allwed in a read operation.
-      std::size_t max_read_size = (std::numeric_limits<std::size_t>::max)();
-   };
-
-   /** \brief Constructor.
-    *
-    *  \param ex The executor.
-    *  \param cfg Configuration parameters.
-    */
-   client(boost::asio::any_io_executor ex, config cfg = config{})
-   : resv_{ex}
-   , read_timer_{ex}
-   , write_timer_{ex}
-   , wait_write_timer_{ex}
-   , check_idle_timer_{ex}
-   , cfg_{cfg}
-   , on_read_{[](Command, std::size_t){}}
-   , on_write_{[](std::size_t){}}
-   , on_push_{[](std::size_t){}}
-   , on_resp3_{[](Command, resp3::node<boost::string_view> const&, boost::system::error_code&) {}}
-   , sr_{requests_}
-   , last_data_{std::chrono::time_point<std::chrono::steady_clock>::min()}
-   , type_{resp3::type::invalid}
-   , cmd_info_{std::make_pair<Command>(Command::invalid, 0)}
-   {
-      if (cfg.idle_timeout < std::chrono::seconds{2})
-         cfg.idle_timeout = std::chrono::seconds{2};
-   }
-
-   /// Returns the executor.
-   auto get_executor() {return read_timer_.get_executor();}
-
-   /** @brief Adds a command to the output command queue.
-    *
-    *  Adds a command to the end of the next request and signals the
-    *  writer operation there is a new message awaiting to be sent.
-    *  Otherwise the function is equivalent to serializer::push.  @sa
-    *  serializer.
-    */
-   template <class... Ts>
-   void send(Command cmd, Ts const&... args)
-   {
-      auto const can_write = prepare_next();
-
-      auto const before = requests_.size();
-      sr_.push(cmd, args...);
-      auto const d = requests_.size() - before;
-      BOOST_ASSERT(d != 0);
-      info_.back().size += d;;
-
-      if (!has_push_response(cmd)) {
-         commands_.push_back(std::make_pair(cmd, d));
-         ++info_.back().cmds;
-      }
-
-      if (can_write)
-         wait_write_timer_.cancel_one();
-   }
-
-   /** @brief Adds a command to the output command queue.
-    *
-    *  Adds a command to the end of the next request and signals the
-    *  writer operation there is a new message awaiting to be sent.
-    *  Otherwise the function is equivalent to
-    *  serializer::push_range2.
-    *  @sa serializer.
-    */
-   template <class Key, class ForwardIterator>
-   void send_range2(Command cmd, Key const& key, ForwardIterator begin, ForwardIterator end)
-   {
-      if (begin == end)
-         return;
-
-      auto const can_write = prepare_next();
-
-      auto const before = requests_.size();
-      sr_.push_range2(cmd, key, begin, end);
-      auto const d = requests_.size() - before;
-      BOOST_ASSERT(d != 0);
-      info_.back().size += d;
-
-      if (!has_push_response(cmd)) {
-         commands_.push_back(std::make_pair(cmd, d));
-         ++info_.back().cmds;
-      }
-
-      if (can_write)
-         wait_write_timer_.cancel_one();
-   }
-
-   /** @brief Adds a command to the output command queue.
-    *
-    *  Adds a command to the end of the next request and signals the
-    *  writer operation there is a new message awaiting to be sent.
-    *  Otherwise the function is equivalent to
-    *  serializer::push_range2.
-    *  @sa serializer.
-    */
-   template <class ForwardIterator>
-   void send_range2(Command cmd, ForwardIterator begin, ForwardIterator end)
-   {
-      if (begin == end)
-         return;
-
-      auto const can_write = prepare_next();
-
-      auto const before = requests_.size();
-      sr_.push_range2(cmd, begin, end);
-      auto const d = requests_.size() - before;
-      BOOST_ASSERT(d != 0);
-      info_.back().size += d;
-
-      if (!has_push_response(cmd)) {
-         commands_.push_back(std::make_pair(cmd, d));
-         ++info_.back().cmds;
-      }
-
-      if (can_write)
-         wait_write_timer_.cancel_one();
-   }
-
-   /** @brief Adds a command to the output command queue.
-    *
-    *  Adds a command to the end of the next request and signals the
-    *  writer operation there is a new message awaiting to be sent.
-    *  Otherwise the function is equivalent to
-    *  serializer::push_range.
-    *  @sa serializer.
-    */
-   template <class Key, class Range>
-   void send_range(Command cmd, Key const& key, Range const& range)
-   {
-      using std::begin;
-      using std::end;
-      send_range2(cmd, key, begin(range), end(range));
-   }
-
-   /** @brief Adds a command to the output command queue.
-    *
-    *  Adds a command to the end of the next request and signals the
-    *  writer operation there is a new message awaiting to be sent.
-    *  Otherwise the function is equivalent to
-    *  serializer::push_range.
-    *  @sa serializer.
-    */
-   template <class Range>
-   void send_range(Command cmd, Range const& range)
-   {
-      using std::begin;
-      using std::end;
-      send_range2(cmd, begin(range), end(range));
-   }
-
-   /** @brief Starts communication with the Redis server asynchronously.
-    *
-    *  This function performs the following steps
-    *
-    *  @li Resolves the Redis host as of \c async_resolve with the
-    *  timeout passed in client::config::resolve_timeout.
-    *
-    *  @li Connects to one of the endpoints returned by the resolve
-    *  operation with the timeout passed in client::config::connect_timeout.
-    *
-    *  @li Starts the \c async_read operation that keeps reading incoming
-    *  responses. Each individual read uses the timeout passed on
-    *  client::config::read_timeout. After each successful read it
-    *  will call the read or push callback.
-    *
-    *  @li Starts the \c async_write operation that waits for new commands
-    *  to be sent to Redis. Each individual write uses the timeout
-    *  passed on client::config::write_timeout. After a successful
-    *  write it will call the write callback.
-    *
-    *  @li Starts the check idle operation with the timeout specified
-    *  in client::config::idle_timeout. If no data is received during
-    *  that time interval \c async_run completes with
-    *  generic::error::idle_timeout.
-    *
-    *  @li Starts the healthy check operation that sends
-    *  redis::command::ping to Redis with a frequency equal to
-    *  client::config::idle_timeout / 2.
-    *
-    *  In addition to the callbacks mentioned above, the read
-    *  operations will call the resp3 callback as soon a new chunks of
-    *  data become available to the user.
-    *
-    *  It is safe to call \c async_run after it has returned.  In this
-    *  case, any outstanding commands will be sent after the
-    *  connection is restablished. If a disconnect occurs while the
-    *  response to a request has not been received, the client doesn't
-    *  try to resend it to avoid resubmission.
-    *
-    *  Example:
-    *
-    *  @code
-    *  awaitable<void> run_with_reconnect(std::shared_ptr<client_type> db)
-    *  {
-    *     auto ex = co_await this_coro::executor;
-    *     asio::steady_timer timer{ex};
-    *  
-    *     for (error_code ec;;) {
-    *        co_await db->async_run("127.0.0.1", "6379", redirect_error(use_awaitable, ec));
-    *        timer.expires_after(std::chrono::seconds{2});
-    *        co_await timer.async_wait(redirect_error(use_awaitable, ec));
-    *     }
-    *  }
-    *  @endcode
-    *
-    *  \param host Ip address or name of the Redis server.
-    *  \param port Port where the Redis server is listening.
-    *  \param token The completion token.
-    *
-    *  The completion token must have the following signature
-    *
-    *  @code
-    *  void f(boost::system::error_code);
-    *  @endcode
-    *
-    *  \return This function returns only when there is an error.
-    */
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_run(
-      boost::string_view host = "127.0.0.1",
-      boost::string_view port = "6379",
-      CompletionToken token = CompletionToken{})
-   {
-      host_ = host;
-      port_ = port;
-
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::run_op<client>{this}, token, read_timer_, write_timer_, wait_write_timer_);
-   }
-
-   /// Set the read handler.
-   void set_read_handler(read_handler_type rh)
-      { on_read_ = std::move(rh); }
-
-   /// Set the write handler.
-   void set_write_handler(write_handler_type wh)
-      { on_write_ = std::move(wh); }
-
-   /// Set the push handler.
-   void set_push_handler(push_handler_type ph)
-      { on_push_ = std::move(ph); }
-
-   /// Set the resp3 handler.
-   void set_resp3_handler(resp3_handler_type rh)
-      { on_resp3_ = std::move(rh); }
-
-   /** @brief Convenience callback setter.
-    *
-    *  Expects a class with the following member functions
-    *
-    *  @code
-    *  struct receiver {
-    *     void on_resp3(Command cmd, resp3::node<boost::string_view> const& nd, boost::system::error_code& ec);
-    *     void on_read(Command cmd, std::size_t);
-    *     void on_write(std::size_t n);
-    *     void on_push(std::size_t n);
-    *  };
-    *  @endcode
-    */
-   template <class Receiver>
-   void set_receiver(std::shared_ptr<Receiver> recv)
-   {
-      on_resp3_ = [recv](Command cmd, resp3::node<boost::string_view> const& nd, boost::system::error_code& ec){recv->on_resp3(cmd, nd, ec);};
-      on_read_ = [recv](Command cmd, std::size_t n){recv->on_read(cmd, n);};
-      on_write_ = [recv](std::size_t n){recv->on_write(n);};
-      on_push_ = [recv](std::size_t n){recv->on_push(n);};
-   }
-
-private:
-   using command_info_type = std::pair<Command, std::size_t>;
-   using time_point_type = std::chrono::time_point<std::chrono::steady_clock>;
-
-   template <class T, class V> friend struct detail::reader_op;
-   template <class T, class V> friend struct detail::ping_after_op;
-   template <class T> friend struct detail::read_op;
-   template <class T> friend struct detail::read_until_op;
-   template <class T> friend struct detail::writer_op;
-   template <class T> friend struct detail::write_op;
-   template <class T> friend struct detail::run_op;
-   template <class T> friend struct detail::connect_op;
-   template <class T> friend struct detail::resolve_op;
-   template <class T> friend struct detail::check_idle_op;
-   template <class T> friend struct detail::init_op;
-   template <class T> friend struct detail::read_write_check_op;
-   template <class T> friend struct detail::wait_for_data_op;
-
-   void on_resolve()
-   {
-      // If we are coming from a connection that was lost we have to
-      // reset the socket to a fresh state.
-      socket_ =
-         std::make_shared<AsyncReadWriteStream>(read_timer_.get_executor());
-   }
-
-   void on_connect()
-   {
-      // When we are reconnecting we can't simply call send(hello)
-      // as that will add the command to the end of the queue, we need
-      // it as the first element.
-      if (info_.empty()) {
-         // Either we are connecting for the first time or there are
-         // no commands that were left unresponded from the last
-         // connection. We can send hello as usual.
-         BOOST_ASSERT(requests_.empty());
-         BOOST_ASSERT(commands_.empty());
-         send(Command::hello, 3);
-         return;
-      }
-
-      if (info_.front().sent) {
-         // There is one request that was left unresponded when we
-         // e.g. lost the connection, since we erase requests right
-         // after writing them to the socket (to avoid resubmission) it
-         // is lost and we have to remove it.
-         
-         // Noop if info_.front().size is already zero, which happens
-         // when the request was successfully writen to the socket.
-         // In the future we may want to avoid erasing but resend (at
-         // the risc of resubmission).
-         requests_.erase(0, info_.front().size);
-
-         // Erases the commands that were lost as well.
-         commands_.erase(
-            std::begin(commands_),
-            std::begin(commands_) + info_.front().cmds);
-
-         info_.front().cmds = 0;
-
-         // Do not erase the info_ front as we will use it below.
-         // info_.erase(std::begin(info_));
-      }
-
-      // Code below will add a hello to the front of the request and
-      // update info_ and commands_ accordingly.
-
-      auto const old_size = requests_.size();
-      sr_.push(Command::hello, 3);
-      auto const hello_size = requests_.size() - old_size;;
-
-      // Now we have to rotate the hello to the front of the request
-      // (Remember it must always be the first command).
-      std::rotate(
-         std::begin(requests_),
-         std::begin(requests_) + old_size,
-         std::end(requests_));
-
-      // Updates info_.
-      info_.front().size += hello_size;
-      info_.front().cmds += 1;
-
-      // Updates commands_
-      commands_.push_back(std::make_pair(Command::hello, hello_size));
-      std::rotate(
-         std::begin(commands_),
-         std::prev(std::end(commands_)),
-         std::end(commands_));
-   }
-
-   // Prepares the back of the queue to receive further commands.  If
-   // true is returned the request in the front of the queue can be
-   // sent to the server.
-   bool prepare_next()
-   {
-      if (info_.empty()) {
-         info_.push_back({});
-         return true;
-      }
-
-      if (info_.front().sent) {
-         // There is a pending response, we can't modify the front of
-         // the vector.
-         BOOST_ASSERT(info_.front().cmds != 0);
-         if (info_.size() == 1)
-            info_.push_back({});
-
-         return false;
-      }
-
-      // When cmds = 0 there are only commands with push response on
-      // the request and we are not waiting for any response.
-      return info_.front().cmds == 0;
-   }
-
-   // Returns true when the next request can be written.
-   bool on_cmd(command_info_type)
-   {
-      BOOST_ASSERT(!info_.empty());
-      BOOST_ASSERT(!commands_.empty());
-
-      commands_.erase(std::begin(commands_));
-
-      if (--info_.front().cmds != 0)
-         return false;
-
-      info_.erase(std::begin(info_));
-
-      return !info_.empty();
-   }
-
-   // Resolves the address passed in async_run and store the results
-   // in endpoints_.
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_resolve(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::resolve_op<client>{this}, token, resv_.get_executor());
-   }
-
-   // Connects the socket to one of the endpoints in endpoints_ and
-   // stores the successful endpoint in endpoint_.
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_connect(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::connect_op<client>{this}, token, write_timer_.get_executor());
-   }
-
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_read_until(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::read_until_op<client>{this}, token, read_timer_.get_executor());
-   }
-
-   // Reads a complete resp3 response from the socket using the
-   // timeout config::read_timeout.  On a successful read calls
-   // on_read_ or on_push_ depending on whether the response is a push
-   // or a response to a command.
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_read(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::read_op<client>{this}, token, read_timer_.get_executor());
-   }
-
-   // Loops on async_read described above.
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   reader(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::reader_op<client, Command>{this}, token, read_timer_.get_executor());
-   }
-
-   // Write with a timeout.
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_write(
-      CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::write_op<client>{this}, token, write_timer_);
-   }
-
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   writer(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::writer_op<client>{this}, token, wait_write_timer_);
-   }
-
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_init(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::init_op<client>{this}, token, write_timer_, resv_);
-   }
-
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_read_write_check(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::read_write_check_op<client>{this}, token, read_timer_, write_timer_, wait_write_timer_, check_idle_timer_);
-   }
-
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_ping_after(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::ping_after_op<client, Command>{this}, token, read_timer_);
-   }
-
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_wait_for_data(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::wait_for_data_op<client>{this}, token, read_timer_);
-   }
-
-   template <class CompletionToken = default_completion_token_type>
-   auto
-   async_check_idle(CompletionToken&& token = default_completion_token_type{})
-   {
-      return boost::asio::async_compose
-         < CompletionToken
-         , void(boost::system::error_code)
-         >(detail::check_idle_op<client>{this}, token, check_idle_timer_);
-   }
-
-   void on_reader_exit()
-   {
-      socket_->close();
-      wait_write_timer_.expires_at(std::chrono::steady_clock::now());
-   }
-
-   // Stores information about a request.
-   struct info {
-      // Set to true before calling async_write.
-      bool sent = false;
-
-      // Request size in bytes. After a successful write it is set to
-      // zero.
-      std::size_t size = 0;
-
-      // The number of commands it contains. Commands with push
-      // responses are not counted.
-      std::size_t cmds = 0;
-   };
-
-   // Used to resolve the host on async_resolve.
-   boost::asio::ip::tcp::resolver resv_;
-
-   // The tcp socket.
-   std::shared_ptr<AsyncReadWriteStream> socket_;
-
-   // Timer used with async_read.
-   boost::asio::steady_timer read_timer_;
-
-   // Timer used with async_write.
-   boost::asio::steady_timer write_timer_;
-
-   // Timer that is canceled when a new message is added to the output
-   // queue.
-   boost::asio::steady_timer wait_write_timer_;
-
-   // Check idle timer.
-   boost::asio::steady_timer check_idle_timer_;
-
-   // Configuration parameters.
-   config cfg_;
-
-   // Called when a complete message is read.
-   read_handler_type on_read_;
-
-   // Called when a request has been written to the socket.
-   write_handler_type on_write_;
-
-   // Called when a complete push message is received.
-   push_handler_type on_push_;
-
-   // Called by the parser after each new chunk of resp3 data is
-   // processed.
-   resp3_handler_type on_resp3_;
-
-   // Buffer used by the read operations.
-   std::string read_buffer_;
-
-   // Requests payload and its serializer.
-   std::string requests_;
-   serializer<std::string> sr_;
-
-   // The commands contained in the requests.
-   std::vector<command_info_type> commands_;
-
-   // Info about the requests.
-   std::vector<info> info_;
-
-   // Last time we received data.
-   time_point_type last_data_;
-
-   // Used by the read_op.
-   resp3::type type_;
-
-   // Used by the read_op.
-   command_info_type cmd_info_;
-
-   // See async_connect.
-   boost::asio::ip::tcp::endpoint endpoint_;
-
-   // See async_resolve.
-   boost::asio::ip::tcp::resolver::results_type endpoints_;
-
-   // Host and port passed to async_run.
-   boost::string_view host_;
-   boost::string_view port_;
-};
-
-} // generic
-} // aedis
-
-#endif // AEDIS_GENERIC_CLIENT_HPP

aedis/generic/detail/client_ops.hpp

@@ -1,554 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_GENERIC_CLIENT_OPS_HPP
-#define AEDIS_GENERIC_CLIENT_OPS_HPP
-
-#include <array>
-
-#include <boost/system.hpp>
-#include <boost/asio/write.hpp>
-#include <boost/asio/connect.hpp>
-#include <boost/core/ignore_unused.hpp>
-#include <boost/assert.hpp>
-#include <boost/asio/experimental/parallel_group.hpp>
-
-#include <aedis/resp3/type.hpp>
-#include <aedis/resp3/detail/parser.hpp>
-#include <aedis/resp3/read.hpp>
-#include <aedis/generic/error.hpp>
-
-namespace aedis {
-namespace generic {
-namespace detail {
-
-#include <boost/asio/yield.hpp>
-
-template <class Client, class Command>
-struct ping_after_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void
-   operator()(Self& self, boost::system::error_code ec = {})
-   {
-      reenter (coro)
-      {
-         BOOST_ASSERT((cli->cfg_.idle_timeout / 2) != std::chrono::seconds{0});
-         cli->read_timer_.expires_after(cli->cfg_.idle_timeout / 2);
-         yield cli->read_timer_.async_wait(std::move(self));
-         if (ec) {
-            self.complete(ec);
-            return;
-         }
-
-         // The timer fired, send the ping.
-         cli->send(Command::ping);
-         self.complete({});
-      }
-   }
-};
-
-template <class Client>
-struct read_until_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void operator()( Self& self
-                  , boost::system::error_code ec = {}
-                  , std::size_t n = 0)
-   {
-      reenter (coro)
-      {
-         // Waits for incomming data.
-         yield
-         boost::asio::async_read_until(
-            *cli->socket_,
-            boost::asio::dynamic_buffer(cli->read_buffer_, cli->cfg_.max_read_size),
-            "\r\n",
-            std::move(self));
-
-         // Cancels the async_ping_after.
-         cli->read_timer_.cancel();
-         self.complete(ec);
-      }
-   }
-};
-
-template <class Client>
-struct wait_for_data_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void operator()( Self& self
-                  , std::array<std::size_t, 2> order = {}
-                  , boost::system::error_code ec1 = {}
-                  , boost::system::error_code ec2 = {})
-   {
-      reenter (coro)
-      {
-         yield
-         boost::asio::experimental::make_parallel_group(
-            [this](auto token) { return cli->async_read_until(token);},
-            [this](auto token) { return cli->async_ping_after(token);}
-         ).async_wait(
-            boost::asio::experimental::wait_for_all(),
-            std::move(self));
-
-         // The order of completion is not important.
-         self.complete(ec1);
-      }
-   }
-};
-
-template <class Client>
-struct check_idle_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void operator()(Self& self, boost::system::error_code ec = {})
-   {
-      reenter (coro) for(;;)
-      {
-         cli->check_idle_timer_.expires_after(cli->cfg_.idle_timeout);
-         yield cli->check_idle_timer_.async_wait(std::move(self));
-         if (ec) {
-            self.complete(ec);
-            return;
-         }
-
-         auto const now = std::chrono::steady_clock::now();
-         if (cli->last_data_ +  cli->cfg_.idle_timeout < now) {
-            cli->on_reader_exit();
-            self.complete(error::idle_timeout);
-            return;
-         }
-
-         cli->last_data_ = now;
-      }
-   }
-};
-
-template <class Client>
-struct resolve_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void
-   operator()( Self& self
-             , boost::system::error_code ec = {}
-             , boost::asio::ip::tcp::resolver::results_type res = {})
-   {
-      reenter (coro)
-      {
-         yield
-         cli->resv_.async_resolve(cli->host_.data(), cli->port_.data(), std::move(self));
-         if (ec) {
-            self.complete(ec);
-            return;
-         }
-
-         cli->endpoints_ = res;
-         self.complete({});
-      }
-   }
-};
-
-template <class Client>
-struct connect_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void
-   operator()( Self& self
-             , boost::system::error_code ec = {}
-             , boost::asio::ip::tcp::endpoint const& ep = {})
-   {
-      reenter (coro)
-      {
-         yield
-         boost::asio::async_connect(
-            *cli->socket_,
-            cli->endpoints_,
-            std::move(self));
-
-         if (ec) {
-            self.complete(ec);
-            return;
-         }
-
-         cli->endpoint_ = ep;
-         self.complete({});
-      }
-   }
-};
-
-template <class Client>
-struct init_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void operator()( Self& self
-                  , std::array<std::size_t, 2> order = {}
-                  , boost::system::error_code ec1 = {}
-                  , boost::system::error_code ec2 = {})
-   {
-      reenter (coro)
-      {
-         // Tries to resolve with a timeout. We can use the writer
-         // timer here as there is no ongoing write operation.
-         cli->write_timer_.expires_after(cli->cfg_.resolve_timeout);
-
-         yield
-         boost::asio::experimental::make_parallel_group(
-            [this](auto token) { return cli->async_resolve(token);},
-            [this](auto token) { return cli->write_timer_.async_wait(token);}
-         ).async_wait(
-            boost::asio::experimental::wait_for_one(),
-            std::move(self));
-
-         switch (order[0]) {
-            case 0:
-            {
-               if (ec1) {
-                  self.complete(ec1);
-                  return;
-               }
-
-               cli->on_resolve();
-            } break;
-
-            case 1:
-            {
-               if (!ec2) {
-                  self.complete(generic::error::resolve_timeout);
-                  return;
-               }
-            } break;
-
-            default: BOOST_ASSERT(false);
-         }
-
-         // Tries a connection with a timeout. We can use the writer
-         // timer here as there is no ongoing write operation.
-         cli->write_timer_.expires_after(cli->cfg_.connect_timeout);
-
-         yield
-         boost::asio::experimental::make_parallel_group(
-            [this](auto token) { return cli->async_connect(token);},
-            [this](auto token) { return cli->write_timer_.async_wait(token);}
-         ).async_wait(
-            boost::asio::experimental::wait_for_one(),
-            std::move(self));
-
-         switch (order[0]) {
-            case 0:
-            {
-               if (ec1) {
-                  self.complete(ec1);
-                  return;
-               }
-
-               cli->on_connect();
-            } break;
-
-            case 1:
-            {
-               if (!ec2) {
-                  self.complete(generic::error::connect_timeout);
-                  return;
-               }
-            } break;
-
-            default: BOOST_ASSERT(false);
-         }
-
-         self.complete({});
-      }
-   }
-};
-
-template <class Client>
-struct read_write_check_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void operator()( Self& self
-                  , std::array<std::size_t, 3> order = {}
-                  , boost::system::error_code ec1 = {}
-                  , boost::system::error_code ec2 = {}
-                  , boost::system::error_code ec3 = {})
-   {
-      reenter (coro)
-      {
-         // Starts the reader and writer ops.
-         cli->wait_write_timer_.expires_at(std::chrono::steady_clock::time_point::max());
-
-         yield
-         boost::asio::experimental::make_parallel_group(
-            [this](auto token) { return cli->writer(token);},
-            [this](auto token) { return cli->reader(token);},
-            [this](auto token) { return cli->async_check_idle(token);}
-         ).async_wait(
-            boost::asio::experimental::wait_for_one_error(),
-            std::move(self));
-
-         switch (order[0]) {
-           case 0:
-           {
-              BOOST_ASSERT(ec1);
-              self.complete(ec1);
-           } break;
-           case 1:
-           {
-              BOOST_ASSERT(ec2);
-              self.complete(ec2);
-           } break;
-           case 2:
-           {
-              BOOST_ASSERT(ec3);
-              self.complete(ec3);
-           } break;
-           default: BOOST_ASSERT(false);
-         }
-      }
-   }
-};
-
-template <class Client>
-struct run_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void operator()(Self& self, boost::system::error_code ec = {})
-   {
-      reenter (coro)
-      {
-         yield cli->async_init(std::move(self));
-         if (ec) {
-            self.complete(ec);
-            return;
-         }
-
-         yield cli->async_read_write_check(std::move(self));
-         if (ec) {
-            self.complete(ec);
-            return;
-         }
-
-         BOOST_ASSERT(false);
-      }
-   }
-};
-
-template <class Client>
-struct write_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void operator()( Self& self
-                  , std::array<std::size_t, 2> order = {}
-                  , boost::system::error_code ec1 = {}
-                  , std::size_t n = 0
-                  , boost::system::error_code ec2 = {})
-   {
-      reenter (coro)
-      {
-         BOOST_ASSERT(!cli->info_.empty());
-         BOOST_ASSERT(cli->info_.front().size != 0);
-         BOOST_ASSERT(!cli->requests_.empty());
-
-         cli->write_timer_.expires_after(cli->cfg_.write_timeout);
-         cli->info_.front().sent = true;
-         yield
-         boost::asio::experimental::make_parallel_group(
-            [this](auto token) { return boost::asio::async_write(*cli->socket_, boost::asio::buffer(cli->requests_.data(), cli->info_.front().size), token);},
-            [this](auto token) { return cli->write_timer_.async_wait(token);}
-         ).async_wait(
-            boost::asio::experimental::wait_for_one(),
-            std::move(self));
-
-         switch (order[0]) {
-            case 0:
-            {
-               if (ec1) {
-                  self.complete(ec1);
-                  return;
-               }
-            } break;
-
-            case 1:
-            {
-               if (!ec2) {
-                  self.complete(generic::error::write_timeout);
-                  return;
-               }
-            } break;
-
-            default: BOOST_ASSERT(false);
-         }
-
-         BOOST_ASSERT(!cli->info_.empty());
-         BOOST_ASSERT(cli->info_.front().size != 0);
-         BOOST_ASSERT(!cli->requests_.empty());
-         BOOST_ASSERT(n == cli->info_.front().size);
-
-         cli->requests_.erase(0, n);
-         cli->info_.front().size = 0;
-         if (cli->info_.front().cmds == 0) 
-            cli->info_.erase(std::begin(cli->info_));
-
-         cli->on_write_(n);
-         self.complete({});
-      }
-   }
-};
-
-template <class Client>
-struct writer_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void operator()(Self& self , boost::system::error_code ec = {})
-   {
-      reenter (coro) for (;;)
-      {
-         yield cli->async_write(std::move(self));
-         if (ec) {
-            cli->socket_->close();
-            self.complete(ec);
-            return;
-         }
-
-         yield cli->wait_write_timer_.async_wait(std::move(self));
-
-         if (!cli->socket_->is_open()) {
-            self.complete(error::write_stop_requested);
-            return;
-         }
-      }
-   }
-};
-
-template <class Client>
-struct read_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void operator()( Self& self
-                  , std::array<std::size_t, 2> order = {}
-                  , boost::system::error_code ec1 = {}
-                  , std::size_t n = 0
-                  , boost::system::error_code ec2 = {})
-   {
-      reenter (coro)
-      {
-         cli->read_timer_.expires_after(cli->cfg_.read_timeout);
-
-         yield
-         boost::asio::experimental::make_parallel_group(
-            [this](auto token) { return resp3::async_read(*cli->socket_, boost::asio::dynamic_buffer(cli->read_buffer_, cli->cfg_.max_read_size), [cli_ = cli](resp3::node<boost::string_view> const& nd, boost::system::error_code& ec) mutable {cli_->on_resp3_(cli_->cmd_info_.first, nd, ec);}, token);},
-            [this](auto token) { return cli->read_timer_.async_wait(token);}
-         ).async_wait(
-            boost::asio::experimental::wait_for_one(),
-            std::move(self));
-
-         switch (order[0]) {
-            case 0:
-            {
-               if (ec1) {
-                  self.complete(ec1);
-                  return;
-               }
-            } break;
-
-            case 1:
-            {
-               if (!ec2) {
-                  self.complete(generic::error::read_timeout);
-                  return;
-               }
-            } break;
-
-            default: BOOST_ASSERT(false);
-         }
-
-         if (cli->type_ == resp3::type::push) {
-            cli->on_push_(n);
-         } else {
-            if (cli->on_cmd(cli->cmd_info_))
-               cli->wait_write_timer_.cancel_one();
-
-            cli->on_read_(cli->cmd_info_.first, n);
-         }
-
-         self.complete({});
-      }
-   }
-};
-
-template <class Client, class Command>
-struct reader_op {
-   Client* cli;
-   boost::asio::coroutine coro;
-
-   template <class Self>
-   void operator()( Self& self
-                  , boost::system::error_code ec = {}
-                  , std::size_t n = 0)
-   {
-      boost::ignore_unused(n);
-
-      reenter (coro) for (;;)
-      {
-         if (cli->read_buffer_.empty()) {
-            yield cli->async_wait_for_data(std::move(self));
-            if (ec) {
-               cli->on_reader_exit();
-               self.complete(ec);
-               return;
-            }
-         }
-
-         BOOST_ASSERT(!cli->read_buffer_.empty());
-         cli->type_ = resp3::to_type(cli->read_buffer_.front());
-         cli->cmd_info_ = std::make_pair(Command::invalid, 0);
-         if (cli->type_ != resp3::type::push) {
-            BOOST_ASSERT(!cli->commands_.empty());
-            cli->cmd_info_ = cli->commands_.front();
-         }
-
-         cli->last_data_ = std::chrono::steady_clock::now();
-
-         yield cli->async_read(std::move(self));
-         if (ec) {
-            cli->on_reader_exit();
-            self.complete(ec);
-            return;
-         }
-      }
-   }
-};
-
-#include <boost/asio/unyield.hpp>
-
-} // detail
-} // generic
-} // aedis
-
-#endif // AEDIS_GENERIC_CLIENT_OPS_HPP

aedis/generic/error.hpp

@@ -1,54 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_GENERIC_ERROR_HPP
-#define AEDIS_GENERIC_ERROR_HPP
-
-#include <boost/system/error_code.hpp>
-
-namespace aedis {
-namespace generic {
-
-/** \brief Generic errors.
- *  \ingroup any
- */
-enum class error
-{
-   /// Represents the timeout of the resolve operation.
-   resolve_timeout = 1,
-
-   /// Represents the timeout of the connect operation.
-   connect_timeout,
-
-   /// Represents the timeout of the read operation.
-   read_timeout,
-
-   /// Represents the timeout of the write operation.
-   write_timeout,
-
-   /// Idle timeout.
-   idle_timeout,
-
-   /// Write stop requested.
-   write_stop_requested,
-};
-
-/** \brief Creates a error_code object from an error.
- *  \ingroup any
- */
-boost::system::error_code make_error_code(error e);
-
-} // generic
-} // aedis
-
-namespace std {
-
-template<>
-struct is_error_code_enum<::aedis::generic::error> : std::true_type {};
-
-} // std
-
-#endif // AEDIS_GENERIC_ERROR_HPP

aedis/generic/impl/error.ipp

@@ -1,48 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <aedis/generic/error.hpp>
-
-namespace aedis {
-namespace generic {
-namespace detail {
-
-struct error_category_impl : boost::system::error_category {
-
-   char const* name() const noexcept override
-   {
-      return "aedis.generic";
-   }
-
-   std::string message(int ev) const override
-   {
-      switch(static_cast<error>(ev)) {
-	 case error::resolve_timeout: return "Resolve operation timeout.";
-	 case error::connect_timeout: return "Connect operation timeout.";
-	 case error::read_timeout: return "Read operation timeout.";
-	 case error::write_timeout: return "Write operation timeout.";
-	 case error::idle_timeout: return "Idle timeout.";
-	 case error::write_stop_requested: return "Write stop requested.";
-	 default: BOOST_ASSERT(false);
-      }
-   }
-};
-
-boost::system::error_category const& category()
-{
-  static error_category_impl instance;
-  return instance;
-}
-
-} // detail
-
-boost::system::error_code make_error_code(error e)
-{
-    return boost::system::error_code{static_cast<int>(e), detail::category()};
-}
-
-} // generic
-} // aedis

aedis/generic/serializer.hpp

@@ -1,203 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_GENERIC_SERIALIZER_HPP
-#define AEDIS_GENERIC_SERIALIZER_HPP
-
-#include <boost/hana.hpp>
-#include <aedis/resp3/compose.hpp>
-
-// NOTE: Consider detecting tuples in the type in the parameter pack
-// to calculate the header size correctly.
-//
-// NOTE: For some commands like hset it would be a good idea to assert
-// the value type is a pair.
-
-namespace aedis {
-namespace generic {
-
-/** @brief Creates Redis requests from user data.
- *  \ingroup any
- *  
- *  A request is composed of one or more redis commands and is
- *  referred to in the redis documentation as a pipeline, see
- *  https://redis.io/topics/pipelining.
- *
- *  Example
- *
- *  @code
- *  std::string request;
- *  auto sr = make_serializer(request);
- *  sr.push(command::hello, 3);
- *  sr.push(command::flushall);
- *  sr.push(command::ping);
- *  sr.push(command::incr, "key");
- *  sr.push(command::quit);
- *  co_await async_write(socket, buffer(request));
- *  @endcode
- *
- *  \tparam Storage The storage type e.g \c std::string.
- *
- *  \remarks  Non-string types will be converted to string by using \c
- *  to_bulk, which must be made available over ADL.
- */
-template <class Storage>
-class serializer {
-private:
-   Storage* request_;
-
-public:
-   /** \brief Constructor
-    *  
-    *  \param storage The underlying storage object i.e. where the
-    *  request is to be stored.
-    */
-   serializer(Storage& storage) : request_(&storage) {}
-
-   /** @brief Appends a new command to the end of the request.
-    *
-    *  For example
-    *
-    *  \code
-    *  std::string request;
-    *  auto sr = make_serializer<command>(request);
-    *  sr.push(command::set, "key", "some string", "EX", "2");
-    *  \endcode
-    *
-    *  will add the \c set command with value "some string" and an
-    *  expiration of 2 seconds.
-    *
-    *  \param cmd The command e.g redis or sentinel command.
-    *  \param args Command arguments.
-    */
-   template <class Command, class... Ts>
-   void push(Command cmd, Ts const&... args)
-   {
-      using boost::hana::for_each;
-      using boost::hana::make_tuple;
-      using resp3::type;
-
-      auto constexpr pack_size = sizeof...(Ts);
-      resp3::add_header(*request_, type::array, 1 + pack_size);
-
-      resp3::add_bulk(*request_, to_string(cmd));
-      resp3::add_bulk(*request_, make_tuple(args...));
-   }
-
-   /** @brief Appends a new command to the end of the request.
-    *  
-    *  This overload is useful for commands that have a key and have a
-    *  dynamic range of arguments. For example
-    *
-    *  @code
-    *  std::map<std::string, std::string> map
-    *     { {"key1", "value1"}
-    *     , {"key2", "value2"}
-    *     , {"key3", "value3"}
-    *     };
-    *
-    *  request req;
-    *  req.push_range2(command::hset, "key", std::cbegin(map), std::cend(map));
-    *  @endcode
-    *  
-    *  \param cmd The command e.g. Redis or Sentinel command.
-    *  \param key The command key.
-    *  \param begin Iterator to the begin of the range.
-    *  \param end Iterator to the end of the range.
-    */
-   template <class Command, class Key, class ForwardIterator>
-   void push_range2(Command cmd, Key const& key, ForwardIterator begin, ForwardIterator end)
-   {
-      using value_type = typename std::iterator_traits<ForwardIterator>::value_type;
-      using resp3::type;
-
-      if (begin == end)
-         return;
-
-      auto constexpr size = resp3::bulk_counter<value_type>::size;
-      auto const distance = std::distance(begin, end);
-      resp3::add_header(*request_, type::array, 2 + size * distance);
-      resp3::add_bulk(*request_, to_string(cmd));
-      resp3::add_bulk(*request_, key);
-
-      for (; begin != end; ++begin)
-	 resp3::add_bulk(*request_, *begin);
-   }
-
-   /** @brief Appends a new command to the end of the request.
-    *
-    *  This overload is useful for commands that have a dynamic number
-    *  of arguments and don't have a key. For example
-    *
-    *  \code
-    *  std::set<std::string> channels
-    *     { "channel1" , "channel2" , "channel3" }
-    *
-    *  request req;
-    *  req.push(command::subscribe, std::cbegin(channels), std::cedn(channels));
-    *  \endcode
-    *
-    *  \param cmd The Redis command
-    *  \param begin Iterator to the begin of the range.
-    *  \param end Iterator to the end of the range.
-    */
-   template <class Command, class ForwardIterator>
-   void push_range2(Command cmd, ForwardIterator begin, ForwardIterator end)
-   {
-      using value_type = typename std::iterator_traits<ForwardIterator>::value_type;
-      using resp3::type;
-
-      if (begin == end)
-         return;
-
-      auto constexpr size = resp3::bulk_counter<value_type>::size;
-      auto const distance = std::distance(begin, end);
-      resp3::add_header(*request_, type::array, 1 + size * distance);
-      resp3::add_bulk(*request_, to_string(cmd));
-
-      for (; begin != end; ++begin)
-	 resp3::add_bulk(*request_, *begin);
-   }
-
-   /** @brief Appends a new command to the end of the request.
-    *  
-    *  Equivalent to the overload taking a range (i.e. send_range2).
-    */
-   template <class Command, class Key, class Range>
-   void push_range(Command cmd, Key const& key, Range const& range)
-   {
-      using std::begin;
-      using std::end;
-      push_range2(cmd, key, begin(range), end(range));
-   }
-
-   /** @brief Appends a new command to the end of the request.
-    *
-    *  Equivalent to the overload taking a range (i.e. send_range2).
-    */
-   template <class Command, class Range>
-   void push_range(Command cmd, Range const& range)
-   {
-      using std::begin;
-      using std::end;
-      push_range2(cmd, begin(range), end(range));
-   }
-};
-
-/** \brief Creates a serializer.
- *  \ingroup any
- *  \param storage The string.
- */
-template <class CharT, class Traits, class Allocator>
-auto make_serializer(std::basic_string<CharT, Traits, Allocator>& storage)
-{
-   return serializer<std::basic_string<CharT, Traits, Allocator>>(storage);
-}
-
-} // generic
-} // aedis
-
-#endif // AEDIS_GENERIC_SERIALIZER_HPP

aedis/redis/command.hpp

@@ -1,457 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_REDIS_COMMAND_HPP
-#define AEDIS_REDIS_COMMAND_HPP
-
-#include <ostream>
-#include <string>
-
-namespace aedis {
-namespace redis {
-
-/** \brief Redis commands.
- *  \ingroup any
- *
- *  The full list of of commands can be found at
- *  https://redis.io/commands.
- *
- *  \remark This list was created with the help of the \c command
- *  command.
- */
-enum class command {
-   /// https://redis.io/commands/acl
-   acl,
-   /// https://redis.io/commands/append
-   append,
-   /// https://redis.io/commands/asking
-   asking,
-   /// https://redis.io/commands/auth
-   auth,
-   /// https://redis.io/commands/bgrewriteaof
-   bgrewriteaof,
-   /// https://redis.io/commands/bgsave
-   bgsave,
-   /// https://redis.io/commands/bitcount
-   bitcount,
-   /// https://redis.io/commands/bitfield
-   bitfield,
-   /// https://redis.io/commands/bitfield_ro
-   bitfield_ro,
-   /// https://redis.io/commands/bitop
-   bitop,
-   /// https://redis.io/commands/bitpos
-   bitpos,
-   /// https://redis.io/commands/blpop
-   blpop,
-   /// https://redis.io/commands/brpop
-   brpop,
-   /// https://redis.io/commands/brpoplpush
-   brpoplpush,
-   /// https://redis.io/commands/bzpopmax
-   bzpopmax,
-   /// https://redis.io/commands/bzpopmin
-   bzpopmin,
-   /// https://redis.io/commands/client
-   client,
-   /// https://redis.io/commands/cluster
-   cluster,
-   /// https://redis.io/commands/command
-   command,
-   /// https://redis.io/commands/config
-   config,
-   /// https://redis.io/commands/dbsize
-   dbsize,
-   /// https://redis.io/commands/debug
-   debug,
-   /// https://redis.io/commands/decr
-   decr,
-   /// https://redis.io/commands/decrby
-   decrby,
-   /// https://redis.io/commands/del
-   del,
-   /// https://redis.io/commands/discard
-   discard,
-   /// https://redis.io/commands/dump
-   dump,
-   /// https://redis.io/commands/echo
-   echo,
-   /// https://redis.io/commands/eval
-   eval,
-   /// https://redis.io/commands/evalsha
-   evalsha,
-   /// https://redis.io/commands/exec
-   exec,
-   /// https://redis.io/commands/exists
-   exists,
-   /// https://redis.io/commands/expire
-   expire,
-   /// https://redis.io/commands/expireat
-   expireat,
-   /// https://redis.io/commands/flushall
-   flushall,
-   /// https://redis.io/commands/flushdb
-   flushdb,
-   /// https://redis.io/commands/geoadd
-   geoadd,
-   /// https://redis.io/commands/geodist
-   geodist,
-   /// https://redis.io/commands/geohash
-   geohash,
-   /// https://redis.io/commands/geopos
-   geopos,
-   /// https://redis.io/commands/georadius
-   georadius,
-   /// https://redis.io/commands/georadius_ro
-   georadius_ro,
-   /// https://redis.io/commands/georadiusbymember
-   georadiusbymember,
-   /// https://redis.io/commands/georadiusbymember_ro
-   georadiusbymember_ro,
-   /// https://redis.io/commands/get
-   get,
-   /// https://redis.io/commands/getbit
-   getbit,
-   /// https://redis.io/commands/getrange
-   getrange,
-   /// https://redis.io/commands/getset
-   getset,
-   /// https://redis.io/commands/hdel
-   hdel,
-   /// https://redis.io/commands/hello
-   hello,
-   /// https://redis.io/commands/hexists
-   hexists,
-   /// https://redis.io/commands/hget
-   hget,
-   /// https://redis.io/commands/hgetall
-   hgetall,
-   /// https://redis.io/commands/hincrby
-   hincrby,
-   /// https://redis.io/commands/hincrbyfloat
-   hincrbyfloat,
-   /// https://redis.io/commands/hkeys
-   hkeys,
-   /// https://redis.io/commands/hlen
-   hlen,
-   /// https://redis.io/commands/hmget
-   hmget,
-   /// https://redis.io/commands/hmset
-   hmset,
-   /// https://redis.io/commands/hscan
-   hscan,
-   /// https://redis.io/commands/hset
-   hset,
-   /// https://redis.io/commands/hsetnx
-   hsetnx,
-   /// https://redis.io/commands/hstrlen
-   hstrlen,
-   /// https://redis.io/commands/hvals
-   hvals,
-   /// https://redis.io/commands/incr
-   incr,
-   /// https://redis.io/commands/incrby
-   incrby,
-   /// https://redis.io/commands/incrbyfloat
-   incrbyfloat,
-   /// https://redis.io/commands/info
-   info,
-   /// https://redis.io/commands/keys
-   keys,
-   /// https://redis.io/commands/lastsave
-   lastsave,
-   /// https://redis.io/commands/latency
-   latency,
-   /// https://redis.io/commands/lindex
-   lindex,
-   /// https://redis.io/commands/linsert
-   linsert,
-   /// https://redis.io/commands/llen
-   llen,
-   /// https://redis.io/commands/lolwut
-   lolwut,
-   /// https://redis.io/commands/lpop
-   lpop,
-   /// https://redis.io/commands/lpos
-   lpos,
-   /// https://redis.io/commands/lpush
-   lpush,
-   /// https://redis.io/commands/lpushx
-   lpushx,
-   /// https://redis.io/commands/lrange
-   lrange,
-   /// https://redis.io/commands/lrem
-   lrem,
-   /// https://redis.io/commands/lset
-   lset,
-   /// https://redis.io/commands/ltrim
-   ltrim,
-   /// https://redis.io/commands/memory
-   memory,
-   /// https://redis.io/commands/mget
-   mget,
-   /// https://redis.io/commands/migrate
-   migrate,
-   /// https://redis.io/commands/module
-   module,
-   /// https://redis.io/commands/monitor
-   monitor,
-   /// https://redis.io/commands/move
-   move,
-   /// https://redis.io/commands/mset
-   mset,
-   /// https://redis.io/commands/msetnx
-   msetnx,
-   /// https://redis.io/commands/multi
-   multi,
-   /// https://redis.io/commands/object
-   object,
-   /// https://redis.io/commands/persist
-   persist,
-   /// https://redis.io/commands/pexpire
-   pexpire,
-   /// https://redis.io/commands/pexpireat
-   pexpireat,
-   /// https://redis.io/commands/pfadd
-   pfadd,
-   /// https://redis.io/commands/pfcount
-   pfcount,
-   /// https://redis.io/commands/pfdebug
-   pfdebug,
-   /// https://redis.io/commands/pfmerge
-   pfmerge,
-   /// https://redis.io/commands/pfselftest
-   pfselftest,
-   /// https://redis.io/commands/ping
-   ping,
-   /// https://redis.io/commands/post
-   post,
-   /// https://redis.io/commands/psetex
-   psetex,
-   /// https://redis.io/commands/psubscribe
-   psubscribe,
-   /// https://redis.io/commands/psync
-   psync,
-   /// https://redis.io/commands/pttl
-   pttl,
-   /// https://redis.io/commands/publish
-   publish,
-   /// https://redis.io/commands/pubsub
-   pubsub,
-   /// https://redis.io/commands/punsubscribe
-   punsubscribe,
-   /// https://redis.io/commands/randomkey
-   randomkey,
-   /// https://redis.io/commands/readonly
-   readonly,
-   /// https://redis.io/commands/readwrite
-   readwrite,
-   /// https://redis.io/commands/rename
-   rename,
-   /// https://redis.io/commands/renamenx
-   renamenx,
-   /// https://redis.io/commands/replconf
-   replconf,
-   /// https://redis.io/commands/replicaof
-   replicaof,
-   /// https://redis.io/commands/restore
-   restore,
-   /// https://redis.io/commands/role
-   role,
-   /// https://redis.io/commands/rpop
-   rpop,
-   /// https://redis.io/commands/rpoplpush
-   rpoplpush,
-   /// https://redis.io/commands/rpush
-   rpush,
-   /// https://redis.io/commands/rpushx
-   rpushx,
-   /// https://redis.io/commands/sadd
-   sadd,
-   /// https://redis.io/commands/save
-   save,
-   /// https://redis.io/commands/scan
-   scan,
-   /// https://redis.io/commands/scard
-   scard,
-   /// https://redis.io/commands/script
-   script,
-   /// https://redis.io/commands/sdiff
-   sdiff,
-   /// https://redis.io/commands/sdiffstore
-   sdiffstore,
-   /// https://redis.io/commands/select
-   select,
-   /// https://redis.io/commands/set
-   set,
-   /// https://redis.io/commands/setbit
-   setbit,
-   /// https://redis.io/commands/setex
-   setex,
-   /// https://redis.io/commands/setnx
-   setnx,
-   /// https://redis.io/commands/setrange
-   setrange,
-   /// https://redis.io/commands/shutdown
-   shutdown,
-   /// https://redis.io/commands/sinter
-   sinter,
-   /// https://redis.io/commands/sinterstore
-   sinterstore,
-   /// https://redis.io/commands/sismember
-   sismember,
-   /// https://redis.io/commands/slaveof
-   slaveof,
-   /// https://redis.io/commands/slowlog
-   slowlog,
-   /// https://redis.io/commands/smembers
-   smembers,
-   /// https://redis.io/commands/smove
-   smove,
-   /// https://redis.io/commands/sort
-   sort,
-   /// https://redis.io/commands/spop
-   spop,
-   /// https://redis.io/commands/srandmember
-   srandmember,
-   /// https://redis.io/commands/srem
-   srem,
-   /// https://redis.io/commands/sscan
-   sscan,
-   /// https://redis.io/commands/stralgo
-   stralgo,
-   /// https://redis.io/commands/strlen
-   strlen,
-   /// https://redis.io/commands/subscribe
-   subscribe,
-   /// https://redis.io/commands/substr
-   substr,
-   /// https://redis.io/commands/sunion
-   sunion,
-   /// https://redis.io/commands/sunionstore
-   sunionstore,
-   /// https://redis.io/commands/swapdb
-   swapdb,
-   /// https://redis.io/commands/sync
-   sync,
-   /// https://redis.io/commands/time
-   time,
-   /// https://redis.io/commands/touch
-   touch,
-   /// https://redis.io/commands/ttl
-   ttl,
-   /// https://redis.io/commands/type
-   type,
-   /// https://redis.io/commands/unlink
-   unlink,
-   /// https://redis.io/commands/quit
-   quit,
-   /// https://redis.io/commands/unsubscribe
-   unsubscribe,
-   /// https://redis.io/commands/unwatch
-   unwatch,
-   /// https://redis.io/commands/wait
-   wait,
-   /// https://redis.io/commands/watch
-   watch,
-   /// https://redis.io/commands/xack
-   xack,
-   /// https://redis.io/commands/xadd
-   xadd,
-   /// https://redis.io/commands/xclaim
-   xclaim,
-   /// https://redis.io/commands/xdel
-   xdel,
-   /// https://redis.io/commands/xgroup
-   xgroup,
-   /// https://redis.io/commands/xinfo
-   xinfo,
-   /// https://redis.io/commands/xlen
-   xlen,
-   /// https://redis.io/commands/xpending
-   xpending,
-   /// https://redis.io/commands/xrange
-   xrange,
-   /// https://redis.io/commands/xread
-   xread,
-   /// https://redis.io/commands/xreadgroup
-   xreadgroup,
-   /// https://redis.io/commands/xrevrange
-   xrevrange,
-   /// https://redis.io/commands/xsetid
-   xsetid,
-   /// https://redis.io/commands/xtrim
-   xtrim,
-   /// https://redis.io/commands/zadd
-   zadd,
-   /// https://redis.io/commands/zcard
-   zcard,
-   /// https://redis.io/commands/zcount
-   zcount,
-   /// https://redis.io/commands/zincrby
-   zincrby,
-   /// https://redis.io/commands/zinterstore
-   zinterstore,
-   /// https://redis.io/commands/zlexcount
-   zlexcount,
-   /// https://redis.io/commands/zpopmax
-   zpopmax,
-   /// https://redis.io/commands/zpopmin
-   zpopmin,
-   /// https://redis.io/commands/zrange
-   zrange,
-   /// https://redis.io/commands/zrangebylex
-   zrangebylex,
-   /// https://redis.io/commands/zrangebyscore
-   zrangebyscore,
-   /// https://redis.io/commands/zrank
-   zrank,
-   /// https://redis.io/commands/zrem
-   zrem,
-   /// https://redis.io/commands/zremrangebylex
-   zremrangebylex,
-   /// https://redis.io/commands/zremrangebyrank
-   zremrangebyrank,
-   /// https://redis.io/commands/zremrangebyscore
-   zremrangebyscore,
-   /// https://redis.io/commands/zrevrange
-   zrevrange,
-   /// https://redis.io/commands/zrevrangebylex
-   zrevrangebylex,
-   /// https://redis.io/commands/zrevrangebyscore
-   zrevrangebyscore,
-   /// https://redis.io/commands/zrevrank
-   zrevrank,
-   /// https://redis.io/commands/zscan
-   zscan,
-   /// https://redis.io/commands/zscore
-   zscore,
-   /// https://redis.io/commands/zunionstore
-   zunionstore,
-   /// Invalid command.
-   invalid
-};
-
-/** \brief Converts the command to a string.
- *  \ingroup any
- *  \param c The command to convert.
- */
-char const* to_string(command c);
-
-/** \brief Writes the command string to the stream.
- *  \ingroup any
- *  \param os Output stream.
- *  \param c Redis command
- */
-std::ostream& operator<<(std::ostream& os, command c);
-
-// Checks whether a command has push response.
-bool has_push_response(command cmd);
-
-} // redis
-} // aedis
-
-#endif // AEDIS_REDIS_COMMAND_HPP

aedis/redis/impl/command.ipp

@@ -1,245 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <aedis/redis/command.hpp>
-
-namespace aedis {
-namespace redis {
-
-char const* to_string(command c)
-{
-   static char const* table[] = {
-      "ACL",
-      "APPEND",
-      "ASKING",
-      "AUTH",
-      "BGREWRITEAOF",
-      "BGSAVE",
-      "BITCOUNT",
-      "BITFIELD",
-      "BITFIELD_RO",
-      "BITOP",
-      "BITPOS",
-      "BLPOP",
-      "BRPOP",
-      "BRPOPLPUSH",
-      "BZPOPMAX",
-      "BZPOPMIN",
-      "CLIENT",
-      "CLUSTER",
-      "COMMAND",
-      "CONFIG",
-      "DBSIZE",
-      "DEBUG",
-      "DECR",
-      "DECRBY",
-      "DEL",
-      "DISCARD",
-      "DUMP",
-      "ECHO",
-      "EVAL",
-      "EVALSHA",
-      "EXEC",
-      "EXISTS",
-      "EXPIRE",
-      "EXPIREAT",
-      "FLUSHALL",
-      "FLUSHDB",
-      "GEOADD",
-      "GEODIST",
-      "GEOHASH",
-      "GEOPOS",
-      "GEORADIUS",
-      "GEORADIUS_RO",
-      "GEORADIUSBYMEMBER",
-      "GEORADIUSBYMEMBER_RO",
-      "GET",
-      "GETBIT",
-      "GETRANGE",
-      "GETSET",
-      "HDEL",
-      "HELLO",
-      "HEXISTS",
-      "HGET",
-      "HGETALL",
-      "HINCRBY",
-      "HINCRBYFLOAT",
-      "HKEYS",
-      "HLEN",
-      "HMGET",
-      "HMSET",
-      "HSCAN",
-      "HSET",
-      "HSETNX",
-      "HSTRLEN",
-      "HVALS",
-      "INCR",
-      "INCRBY",
-      "INCRBYFLOAT",
-      "INFO",
-      "KEYS",
-      "LASTSAVE",
-      "LATENCY",
-      "LINDEX",
-      "LINSERT",
-      "LLEN",
-      "LOLWUT",
-      "LPOP",
-      "LPOS",
-      "LPUSH",
-      "LPUSHX",
-      "LRANGE",
-      "LREM",
-      "LSET",
-      "LTRIM",
-      "MEMORY",
-      "MGET",
-      "MIGRATE",
-      "MODULE",
-      "MONITOR",
-      "MOVE",
-      "MSET",
-      "MSETNX",
-      "MULTI",
-      "OBJECT",
-      "PERSIST",
-      "PEXPIRE",
-      "PEXPIREAT",
-      "PFADD",
-      "PFCOUNT",
-      "PFDEBUG",
-      "PFMERGE",
-      "PFSELFTEST",
-      "PING",
-      "POST",
-      "PSETEX",
-      "PSUBSCRIBE",
-      "PSYNC",
-      "PTTL",
-      "PUBLISH",
-      "PUBSUB",
-      "PUNSUBSCRIBE",
-      "RANDOMKEY",
-      "READONLY",
-      "READWRITE",
-      "RENAME",
-      "RENAMENX",
-      "REPLCONF",
-      "REPLICAOF",
-      "RESTORE",
-      "ROLE",
-      "RPOP",
-      "RPOPLPUSH",
-      "RPUSH",
-      "RPUSHX",
-      "SADD",
-      "SAVE",
-      "SCAN",
-      "SCARD",
-      "SCRIPT",
-      "SDIFF",
-      "SDIFFSTORE",
-      "SELECT",
-      "SET",
-      "SETBIT",
-      "SETEX",
-      "SETNX",
-      "SETRANGE",
-      "SHUTDOWN",
-      "SINTER",
-      "SINTERSTORE",
-      "SISMEMBER",
-      "SLAVEOF",
-      "SLOWLOG",
-      "SMEMBERS",
-      "SMOVE",
-      "SORT",
-      "SPOP",
-      "SRANDMEMBER",
-      "SREM",
-      "SSCAN",
-      "STRALGO",
-      "STRLEN",
-      "SUBSCRIBE",
-      "SUBSTR",
-      "SUNION",
-      "SUNIONSTORE",
-      "SWAPDB",
-      "SYNC",
-      "TIME",
-      "TOUCH",
-      "TTL",
-      "TYPE",
-      "UNLINK",
-      "QUIT",
-      "UNSUBSCRIBE",
-      "UNWATCH",
-      "WAIT",
-      "WATCH",
-      "XACK",
-      "XADD",
-      "XCLAIM",
-      "XDEL",
-      "XGROUP",
-      "XINFO",
-      "XLEN",
-      "XPENDING",
-      "XRANGE",
-      "XREAD",
-      "XREADGROUP",
-      "XREVRANGE",
-      "XSETID",
-      "XTRIM",
-      "ZADD",
-      "ZCARD",
-      "ZCOUNT",
-      "ZINCRBY",
-      "ZINTERSTORE",
-      "ZLEXCOUNT",
-      "ZPOPMAX",
-      "ZPOPMIN",
-      "ZRANGE",
-      "ZRANGEBYLEX",
-      "ZRANGEBYSCORE",
-      "ZRANK",
-      "ZREM",
-      "ZREMRANGEBYLEX",
-      "ZREMRANGEBYRANK",
-      "ZREMRANGEBYSCORE",
-      "ZREVRANGE",
-      "ZREVRANGEBYLEX",
-      "ZREVRANGEBYSCORE",
-      "ZREVRANK",
-      "ZSCAN",
-      "ZSCORE",
-      "ZUNIONSTORE",
-      "INVALID",
-   };
-
-   return table[static_cast<int>(c)];
-}
-
-std::ostream& operator<<(std::ostream& os, command c)
-{
-   os << to_string(c);
-   return os;
-}
-
-bool has_push_response(command cmd)
-{
-   switch (cmd) {
-      case command::subscribe:
-      case command::unsubscribe:
-      case command::psubscribe:
-      return true;
-
-      default:
-      return false;
-   }
-}
-
-} // redis
-} // aedis

aedis/resp3/compose.hpp

@@ -1,159 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_RESP3_COMPOSE_HPP
-#define AEDIS_RESP3_COMPOSE_HPP
-
-#include <string>
-#include <tuple>
-
-#include <boost/hana.hpp>
-#include <boost/utility/string_view.hpp>
-
-#include <aedis/resp3/type.hpp>
-
-namespace aedis {
-namespace resp3 {
-
-constexpr char separator[] = "\r\n";
-
-/** @brief Adds a bulk to the request.
- *  @ingroup any
- *
- *  This function is useful in serialization of your own data
- *  structures in a request. For example
- *
- *  @code
- *  void to_bulk(std::string& to, mystruct const& obj)
- *  {
- *     auto const str = // Convert obj to a string.
- *     resp3::to_bulk(to, str);
- *  }
- *  @endcode
- *
- *  See more in \ref requests-serialization.
- */
-template <class Request>
-void to_bulk(Request& to, boost::string_view data)
-{
-   auto const str = std::to_string(data.size());
-
-   to += to_code(type::blob_string);
-   to.append(std::cbegin(str), std::cend(str));
-   to += separator;
-   to.append(std::cbegin(data), std::cend(data));
-   to += separator;
-}
-
-template <class Request, class T, typename = typename std::enable_if<std::is_integral<T>::value>::type>
-void to_bulk(Request& to, T n)
-{
-   auto const s = std::to_string(n);
-   to_bulk(to, boost::string_view{s});
-}
-
-namespace detail {
-
-template <class T>
-struct add_bulk_impl {
-   template <class Request>
-   static void add(Request& to, T const& from)
-   {
-      using namespace aedis::resp3;
-      to_bulk(to, from);
-   }
-};
-
-template <class U, class V>
-struct add_bulk_impl<std::pair<U, V>> {
-   template <class Request>
-   static void add(Request& to, std::pair<U, V> const& from)
-   {
-      using namespace aedis::resp3;
-      to_bulk(to, from.first);
-      to_bulk(to, from.second);
-   }
-};
-
-template <class ...Ts>
-struct add_bulk_impl<boost::hana::tuple<Ts...>> {
-   template <class Request>
-   static void add(Request& to, boost::hana::tuple<Ts...> const& from)
-   {
-      using boost::hana::for_each;
-
-      // Fold expressions is C++17 so we use hana.
-      //(resp3::add_bulk(*request_, args), ...);
-
-      for_each(from, [&](auto const& e) {
-         using namespace aedis::resp3;
-         to_bulk(to, e);
-      });
-   }
-};
-
-} // detail
-
-/** @brief Adds a resp3 header to the request.
- *  @ingroup any
- *
- *  See mystruct.hpp for an example.
- */
-template <class Request>
-void add_header(Request& to, type t, std::size_t size)
-{
-   auto const str = std::to_string(size);
-
-   to += to_code(t);
-   to.append(std::cbegin(str), std::cend(str));
-   to += separator;
-}
-
-/* Adds a rep3 bulk to the request.
- *
- * This function adds \c data as a bulk string to the request \c to.
- */
-template <class Request, class T>
-void add_bulk(Request& to, T const& data)
-{
-   detail::add_bulk_impl<T>::add(to, data);
-}
-
-template <class>
-struct bulk_counter;
-
-template <class>
-struct bulk_counter {
-  static constexpr auto size = 1U;
-};
-
-template <class T, class U>
-struct bulk_counter<std::pair<T, U>> {
-  static constexpr auto size = 2U;
-};
-
-template <class Request>
-void add_blob(Request& to, boost::string_view blob)
-{
-   to.append(std::cbegin(blob), std::cend(blob));
-   to += separator;
-}
-
-/** @brief Adds a separator to the request.
- *  @ingroup any
- *
- *  See mystruct.hpp for an example.
- */
-template <class Request>
-void add_separator(Request& to)
-{
-   to += separator;
-}
-
-} // resp3
-} // aedis
-
-#endif // AEDIS_RESP3_COMPOSE_HPP

aedis/resp3/detail/impl/parser.ipp

@@ -1,30 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <boost/spirit/include/qi.hpp>
-#include <boost/spirit/home/x3.hpp>
-
-#include <aedis/resp3/detail/parser.hpp>
-#include <aedis/resp3/type.hpp>
-
-namespace aedis {
-namespace resp3 {
-namespace detail {
-
-std::size_t
-parse_uint(char const* data, std::size_t size, boost::system::error_code& ec)
-{
-   static constexpr boost::spirit::x3::uint_parser<std::size_t, 10> p{};
-   std::size_t ret;
-   if (!parse(data, data + size, p, ret))
-      ec = error::not_a_number;
-
-   return ret;
-}
-
-} // detail
-} // resp3
-} // aedis

aedis/resp3/detail/parser.hpp

@@ -1,226 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_RESP3_PARSER_HPP
-#define AEDIS_RESP3_PARSER_HPP
-
-#include <limits>
-#include <system_error>
-
-#include <boost/assert.hpp>
-#include <boost/utility/string_view.hpp>
-
-#include <aedis/resp3/error.hpp>
-#include <aedis/resp3/node.hpp>
-
-namespace aedis {
-namespace resp3 {
-namespace detail {
-
-std::size_t parse_uint(char const* data, std::size_t size, boost::system::error_code& ec);
-
-template <class ResponseAdapter>
-class parser {
-private:
-   using node_type = node<boost::string_view>;
-   static constexpr std::size_t max_embedded_depth = 5;
-
-   ResponseAdapter adapter_;
-
-   // The current depth. Simple data types will have depth 0, whereas
-   // the elements of aggregates will have depth 1. Embedded types
-   // will have increasing depth.
-   std::size_t depth_ = 0;
-
-   // The parser supports up to 5 levels of nested structures. The
-   // first element in the sizes stack is a sentinel and must be
-   // different from 1.
-   std::size_t sizes_[max_embedded_depth + 1] = {1};
-
-   // Contains the length expected in the next bulk read.
-   std::size_t bulk_length_ = (std::numeric_limits<std::size_t>::max)();
-
-   // The type of the next bulk. Contains type::invalid if no bulk is
-   // expected.
-   type bulk_ = type::invalid;
-
-public:
-   parser(ResponseAdapter adapter)
-   : adapter_{adapter}
-   {
-      sizes_[0] = 2; // The sentinel must be more than 1.
-   }
-
-   // Returns the number of bytes that have been consumed.
-   std::size_t
-   consume(char const* data, std::size_t n, boost::system::error_code& ec)
-   {
-      if (bulk_ != type::invalid) {
-         n = bulk_length_ + 2;
-         switch (bulk_) {
-            case type::streamed_string_part:
-            {
-               BOOST_ASSERT(bulk_length_ != 0);
-               adapter_({bulk_, 1, depth_, {data, bulk_length_}}, ec);
-               if (ec)
-                  return 0;
-            } break;
-            default:
-	    {
-	       adapter_({bulk_, 1, depth_, {data, bulk_length_}}, ec);
-	       if (ec)
-		  return 0;
-	    }
-         }
-
-         bulk_ = type::invalid;
-         --sizes_[depth_];
-
-      } else if (sizes_[depth_] != 0) {
-         auto const t = to_type(*data);
-         switch (t) {
-            case type::streamed_string_part:
-            {
-               bulk_length_ = parse_uint(data + 1, n - 2, ec);
-	       if (ec)
-		  return 0;
-
-               if (bulk_length_ == 0) {
-                  adapter_({type::streamed_string_part, 1, depth_, {}}, ec);
-                  sizes_[depth_] = 0; // We are done.
-               } else {
-                  bulk_ = type::streamed_string_part;
-               }
-            } break;
-            case type::blob_error:
-            case type::verbatim_string:
-            case type::blob_string:
-            {
-               if (*(data + 1) == '?') {
-                  // NOTE: This can only be triggered with blob_string.
-		  // Trick: A streamed string is read as an aggregate
-		  // of infinite lenght. When the streaming is done
-		  // the server is supposed to send a part with length
-		  // 0.
-                  sizes_[++depth_] = (std::numeric_limits<std::size_t>::max)();
-               } else {
-                  bulk_length_ = parse_uint(data + 1, n - 2, ec);
-                  if (ec)
-                     return 0;
-
-                  bulk_ = t;
-               }
-            } break;
-            case type::boolean:
-            {
-               if (n == 3) {
-                   ec = error::empty_field;
-                   return 0;
-               }
-
-               if (*(data + 1) != 'f' && *(data + 1) != 't') {
-                   ec = error::unexpected_bool_value;
-                   return 0;
-               }
-
-               adapter_({t, 1, depth_, {data + 1, n - 3}}, ec);
-	       if (ec)
-		  return 0;
-
-               --sizes_[depth_];
-            } break;
-            case type::doublean:
-            case type::big_number:
-            case type::number:
-            {
-               if (n == 3) {
-                   ec = error::empty_field;
-                   return 0;
-               }
-
-               adapter_({t, 1, depth_, {data + 1, n - 3}}, ec);
-	       if (ec)
-		  return 0;
-
-               --sizes_[depth_];
-            } break;
-            case type::simple_error:
-            case type::simple_string:
-            {
-               adapter_({t, 1, depth_, {data + 1, n - 3}}, ec);
-	       if (ec)
-		  return 0;
-
-               --sizes_[depth_];
-            } break;
-            case type::null:
-            {
-               adapter_({type::null, 1, depth_, {}}, ec);
-	       if (ec)
-		  return 0;
-
-               --sizes_[depth_];
-            } break;
-            case type::push:
-            case type::set:
-            case type::array:
-            case type::attribute:
-            case type::map:
-            {
-	       auto const l = parse_uint(data + 1, n - 2, ec);
-               if (ec)
-                  return 0;
-
-               adapter_({t, l, depth_, {}}, ec);
-	       if (ec)
-		  return 0;
-
-               if (l == 0) {
-                  --sizes_[depth_];
-               } else {
-		  if (depth_ == max_embedded_depth) {
-		     ec = error::exceeeds_max_nested_depth;
-		     return 0;
-		  }
-
-                  ++depth_;
-
-                  sizes_[depth_] = l * element_multiplicity(t);
-               }
-            } break;
-            default:
-            {
-	       ec = error::invalid_type;
-	       return 0;
-            }
-         }
-      }
-      
-      while (sizes_[depth_] == 0) {
-         --depth_;
-         --sizes_[depth_];
-      }
-      
-      return n;
-   }
-
-   // Returns true when the parser is done with the current message.
-   auto done() const noexcept
-      { return depth_ == 0 && bulk_ == type::invalid; }
-
-   // The bulk type expected in the next read. If none is expected returns
-   // type::invalid.
-   auto bulk() const noexcept { return bulk_; }
-
-   // The length expected in the the next bulk.
-   auto bulk_length() const noexcept { return bulk_length_; }
-};
-
-} // detail
-} // resp3
-} // aedis
-
-#endif // AEDIS_RESP3_PARSER_HPP

aedis/resp3/detail/read_ops.hpp

@@ -1,115 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_RESP3_READ_OPS_HPP
-#define AEDIS_RESP3_READ_OPS_HPP
-
-#include <boost/assert.hpp>
-#include <boost/asio/read.hpp>
-#include <boost/asio/read_until.hpp>
-#include <boost/asio/coroutine.hpp>
-#include <boost/core/ignore_unused.hpp>
-#include <boost/utility/string_view.hpp>
-
-#include <aedis/resp3/detail/parser.hpp>
-
-namespace aedis {
-namespace resp3 {
-namespace detail {
-
-#include <boost/asio/yield.hpp>
-
-struct ignore_response {
-   void operator()(node<boost::string_view>, boost::system::error_code&) { }
-};
-
-template <
-   class AsyncReadStream,
-   class DynamicBuffer,
-   class ResponseAdapter>
-class parse_op {
-private:
-   AsyncReadStream& stream_;
-   DynamicBuffer buf_;
-   parser<ResponseAdapter> parser_;
-   std::size_t consumed_;
-   std::size_t buffer_size_;
-   boost::asio::coroutine coro_;
-
-public:
-   parse_op(AsyncReadStream& stream, DynamicBuffer buf, ResponseAdapter adapter)
-   : stream_ {stream}
-   , buf_ {buf}
-   , parser_ {adapter}
-   , consumed_{0}
-   { }
-
-   template <class Self>
-   void operator()( Self& self
-                  , boost::system::error_code ec = {}
-                  , std::size_t n = 0)
-   {
-      reenter (coro_) for (;;) {
-         if (parser_.bulk() == type::invalid) {
-            yield
-            boost::asio::async_read_until(stream_, buf_, "\r\n", std::move(self));
-
-            if (ec) {
-               self.complete(ec, 0);
-               return;
-            }
-         } else {
-	    // On a bulk read we can't read until delimiter since the
-	    // payload may contain the delimiter itself so we have to
-	    // read the whole chunk. However if the bulk blob is small
-	    // enough it may be already on the buffer (from the last
-	    // read), in which case there is no need of initiating
-	    // another async op, otherwise we have to read the missing
-	    // bytes.
-            if (buf_.size() < (parser_.bulk_length() + 2)) {
-               buffer_size_ = buf_.size();
-               buf_.grow(parser_.bulk_length() + 2 - buffer_size_);
-
-               yield
-               boost::asio::async_read(
-                  stream_,
-                  buf_.data(buffer_size_, parser_.bulk_length() + 2 - buffer_size_),
-                  boost::asio::transfer_all(),
-                  std::move(self));
-
-               if (ec) {
-                  self.complete(ec, 0);
-                  return;
-               }
-            }
-
-            n = parser_.bulk_length() + 2;
-            BOOST_ASSERT(buf_.size() >= n);
-         }
-
-         n = parser_.consume((char const*)buf_.data(0, n).data(), n, ec);
-         if (ec) {
-            self.complete(ec, 0);
-            return;
-         }
-
-         buf_.consume(n);
-         consumed_ += n;
-         if (parser_.done()) {
-            self.complete({}, consumed_);
-            return;
-         }
-      }
-   }
-};
-
-#include <boost/asio/unyield.hpp>
-
-} // detail
-} // resp3
-} // aedis
-
-#endif // AEDIS_RESP3_READ_OPS_HPP

aedis/resp3/error.hpp

@@ -1,54 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_RESP3_ERROR_HPP
-#define AEDIS_RESP3_ERROR_HPP
-
-#include <boost/system/error_code.hpp>
-
-namespace aedis {
-namespace resp3 {
-
-/** \brief RESP3 errors.
- *  \ingroup any
- */
-enum class error
-{
-   /// Invalid RESP3 type.
-   invalid_type = 1,
-
-   /// Can't parse the string as a number.
-   not_a_number,
-
-   /// Received less bytes than expected.
-   unexpected_read_size,
-
-   /// The maximum depth of a nested response was exceeded.
-   exceeeds_max_nested_depth,
-
-   /// Unexpects bool value.
-   unexpected_bool_value,
-
-   /// Expected field value is empty.
-   empty_field
-};
-
-/** \brief Creates a error_code object from an error.
- *  \ingroup any
- */
-boost::system::error_code make_error_code(error e);
-
-} // resp3
-} // aedis
-
-namespace std {
-
-template<>
-struct is_error_code_enum<::aedis::resp3::error> : std::true_type {};
-
-} // std
-
-#endif // AEDIS_RESP3_ERROR_HPP

aedis/resp3/impl/error.ipp

@@ -1,49 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <boost/assert.hpp>
-#include <aedis/resp3/error.hpp>
-
-namespace aedis {
-namespace resp3 {
-namespace detail {
-
-struct error_category_impl : boost::system::error_category {
-
-   char const* name() const noexcept override
-   {
-      return "aedis.resp3";
-   }
-
-   std::string message(int ev) const override
-   {
-      switch(static_cast<error>(ev)) {
-	 case error::invalid_type: return "Invalid resp3 type.";
-	 case error::not_a_number: return "Can't convert string to number.";
-	 case error::unexpected_read_size: return "Unexpected read size.";
-	 case error::exceeeds_max_nested_depth: return "Exceeds the maximum number of nested responses.";
-	 case error::unexpected_bool_value: return "Unexpected bool value.";
-	 case error::empty_field: return "Expected field value is empty.";
-	 default: BOOST_ASSERT(false);
-      }
-   }
-};
-
-boost::system::error_category const& category()
-{
-  static error_category_impl instance;
-  return instance;
-}
-
-} // detail
-
-boost::system::error_code make_error_code(error e)
-{
-    return boost::system::error_code{static_cast<int>(e), detail::category()};
-}
-
-} // resp3
-} // aedis

aedis/resp3/node.hpp

@@ -1,90 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_RESP3_NODE_HPP
-#define AEDIS_RESP3_NODE_HPP
-
-#include <aedis/resp3/type.hpp>
-
-#include <string>
-#include <vector>
-
-namespace aedis {
-namespace resp3 {
-
-/** \brief A node in the response tree.
- *  \ingroup any
- *
- *  Redis responses are the pre-order view of the response tree (see
- *  https://en.wikipedia.org/wiki/Tree_traversal#Pre-order,_NLR).
- *
- *  \remark Any Redis response can be received in an array of nodes,
- *  for example \c std::vector<node<std::string>>.
- */
-template <class String>
-struct node {
-   /// The RESP3 type of the data in this node.
-   resp3::type data_type;
-
-   /// The number of elements of an aggregate.
-   std::size_t aggregate_size;
-
-   /// The depth of this node in the response tree.
-   std::size_t depth;
-
-   /// The actual data. For aggregate types this is usually empty.
-   String value;
-};
-
-/** \brief Converts the node to a string.
- *  \ingroup any
- *
- *  \param in The node object.
- */
-template <class String>
-std::string to_string(node<String> const& in)
-{
-   std::string out;
-   out += std::to_string(in.depth);
-   out += '\t';
-   out += to_string(in.data_type);
-   out += '\t';
-   out += std::to_string(in.aggregate_size);
-   out += '\t';
-   if (!is_aggregate(in.data_type))
-      out.append(in.value.data(), in.value.size());
-
-   return out;
-}
-
-/** \brief Compares a node for equality.
- *  \ingroup any
- */
-template <class String>
-bool operator==(node<String> const& a, node<String> const& b)
-{
-   return a.aggregate_size == b.aggregate_size
-       && a.depth == b.depth
-       && a.data_type == b.data_type
-       && a.value == b.value;
-};
-
-/** \brief Writes the node string to the stream.
- *  \ingroup any
- *
- *  NOTE: Binary data is not converted to text.
- */
-template <class String>
-std::ostream& operator<<(std::ostream& os, node<String> const& o)
-{
-   os << to_string(o);
-   return os;
-}
-
-} // adapter
-} // aedis
-
-#endif // AEDIS_RESP3_NODE_HPP

aedis/resp3/read.hpp

@@ -1,194 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_RESP3_READ_HPP
-#define AEDIS_RESP3_READ_HPP
-
-#include <aedis/resp3/type.hpp>
-#include <aedis/resp3/detail/parser.hpp>
-#include <aedis/resp3/detail/read_ops.hpp>
-
-#include <boost/asio/read.hpp>
-#include <boost/asio/compose.hpp>
-#include <boost/asio/async_result.hpp>
-#include <boost/asio/yield.hpp>
-
-namespace aedis {
-namespace resp3 {
-
-/** \brief Reads a complete response to a command sychronously.
- *  \ingroup any
- *
- *  This function reads a complete response to a command or a
- *  server push synchronously. For example
- *
- *  @code
- *  int resp;
- *  std::string buffer;
- *  resp3::read(socket, dynamic_buffer(buffer), adapt(resp));
- *  @endcode
- *
- *  For a complete example see examples/intro_sync.cpp. This function
- *  is implemented in terms of one or more calls to @c
- *  asio::read_until and @c asio::read functions, and is known as a @a
- *  composed @a operation. Furthermore, the implementation may read
- *  additional bytes from the stream that lie past the end of the
- *  message being read. These additional bytes are stored in the
- *  dynamic buffer, which must be preserved for subsequent reads.
- *
- *  \param stream The stream from which to read e.g. a tcp socket.
- *  \param buf Dynamic buffer (version 2).
- *  \param adapter The response adapter, see more on \ref low-level-responses.
- *  \param ec If an error occurs, it will be assigned to this paramter.
- *  \returns The number of bytes that have been consumed from the dynamic buffer.
- *
- *  \remark This function calls buf.consume() in each chunk of data
- *  after it has been passed to the adapter. Users must not consume
- *  the bytes after it returns.
- */
-template <
-  class SyncReadStream,
-  class DynamicBuffer,
-  class ResponseAdapter
-  >
-std::size_t
-read(
-   SyncReadStream& stream,
-   DynamicBuffer buf,
-   ResponseAdapter adapter,
-   boost::system::error_code& ec)
-{
-   detail::parser<ResponseAdapter> p {adapter};
-   std::size_t n = 0;
-   std::size_t consumed = 0;
-   do {
-      if (p.bulk() == type::invalid) {
-	 n = boost::asio::read_until(stream, buf, "\r\n", ec);
-	 if (ec)
-	    return 0;
-
-	 if (n < 3) {
-            ec = error::unexpected_read_size;
-            return 0;
-         }
-      } else {
-	 auto const s = buf.size();
-	 auto const l = p.bulk_length();
-	 if (s < (l + 2)) {
-	    auto const to_read = l + 2 - s;
-	    buf.grow(to_read);
-	    n = boost::asio::read(stream, buf.data(s, to_read), ec);
-	    if (ec)
-	       return 0;
-
-            if (n < to_read) {
-               ec = error::unexpected_read_size;
-               return 0;
-            }
-	 }
-      }
-
-      auto const* data = (char const*) buf.data(0, n).data();
-      n = p.consume(data, n, ec);
-      if (ec)
-         return 0;
-
-      buf.consume(n);
-      consumed += n;
-   } while (!p.done());
-
-   return consumed;
-}
-
-/** \brief Reads a complete response to a command sychronously.
- *  \ingroup any
- *  
- *  Same as the error_code overload but throws on error.
- */
-template<
-   class SyncReadStream,
-   class DynamicBuffer,
-   class ResponseAdapter = detail::ignore_response>
-std::size_t
-read(
-   SyncReadStream& stream,
-   DynamicBuffer buf,
-   ResponseAdapter adapter = ResponseAdapter{})
-{
-   boost::system::error_code ec;
-   auto const n = resp3::read(stream, buf, adapter, ec);
-
-   if (ec)
-       BOOST_THROW_EXCEPTION(boost::system::system_error{ec});
-
-   return n;
-}
-
-/** @brief Reads a complete response to a Redis command asynchronously.
- *  \ingroup any
- *
- *  This function reads a complete response to a command or a
- *  server push asynchronously. For example
- *
- *  @code
- *  std::string buffer;
- *  std::set<std::string> resp;
- *  co_await resp3::async_read(socket, dynamic_buffer(buffer), adapt(resp));
- *  @endcode
- *
- *  For a complete example see examples/transaction.cpp. This function
- *  is implemented in terms of one or more calls to @c
- *  asio::async_read_until and @c asio::async_read functions, and is
- *  known as a @a composed @a operation.  Furthermore, the
- *  implementation may read additional bytes from the stream that lie
- *  past the end of the message being read. These additional bytes are
- *  stored in the dynamic buffer, which must be preserved for
- *  subsequent reads.
- *
- *  \param stream The stream from which to read e.g. a tcp socket.
- *  \param buffer Dynamic buffer (version 2).
- *  \param adapter The response adapter, see more on \ref low-level-responses.
- *  \param token The completion token.
- *
- *  The completion handler will receive as a parameter the total
- *  number of bytes transferred from the stream and must have the
- *  following signature
- *
- *  @code
- *  void(boost::system::error_code, std::size_t);
- *  @endcode
- *
- *  \remark This function calls buf.consume() in each chunk of data
- *  after it has been passed to the adapter. Users must not consume
- *  the bytes after it returns.
- */
-template <
-   class AsyncReadStream,
-   class DynamicBuffer,
-   class ResponseAdapter = detail::ignore_response,
-   class CompletionToken = boost::asio::default_completion_token_t<typename AsyncReadStream::executor_type>
-   >
-auto async_read(
-   AsyncReadStream& stream,
-   DynamicBuffer buffer,
-   ResponseAdapter adapter = ResponseAdapter{},
-   CompletionToken&& token =
-      boost::asio::default_completion_token_t<typename AsyncReadStream::executor_type>{})
-{
-   return boost::asio::async_compose
-      < CompletionToken
-      , void(boost::system::error_code, std::size_t)
-      >(detail::parse_op<AsyncReadStream, DynamicBuffer, ResponseAdapter> {stream, buffer, adapter},
-        token,
-        stream);
-}
-
-} // resp3
-} // aedis
-
-#include <boost/asio/unyield.hpp>
-
-#endif // AEDIS_RESP3_READ_HPP

aedis/resp3/type.hpp

@@ -1,89 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_RESP3_TYPE_HPP
-#define AEDIS_RESP3_TYPE_HPP
-
-#include <ostream>
-#include <vector>
-#include <string>
-
-namespace aedis {
-namespace resp3 {
-
-/** \brief RESP3 data types.
-    \ingroup any
-  
-    The RESP3 specification can be found at https://github.com/redis/redis-specifications/blob/master/protocol/RESP3.md.
- */
-enum class type
-{ /// Aggregate
-  array,
-  /// Aaggregate
-  push,
-  /// Aggregate
-  set,
-  /// Aggregate
-  map,
-  /// Aggregate
-  attribute,
-  /// Simple
-  simple_string,
-  /// Simple
-  simple_error,
-  /// Simple
-  number,
-  /// Simple
-  doublean,
-  /// Simple
-  boolean,
-  /// Simple
-  big_number,
-  /// Simple
-  null,
-  /// Simple
-  blob_error,
-  /// Simple
-  verbatim_string,
-  /// Simple
-  blob_string,
-  /// Simple
-  streamed_string_part,
-  /// Invalid
-  invalid
-};
-
-/** \brief Converts the data type to a string.
- *  \ingroup any
- *  \param t RESP3 type.
- */
-char const* to_string(type t);
-
-/** \brief Writes the type to the output stream.
- *  \ingroup any
- *  \param os Output stream.
- *  \param t RESP3 type.
- */
-std::ostream& operator<<(std::ostream& os, type t);
-
-/* Checks whether the data type is an aggregate.
- */
-bool is_aggregate(type t);
-
-// For map and attribute data types this function returns 2.  All
-// other types have value 1.
-std::size_t element_multiplicity(type t);
-
-// Returns the wire code of a given type.
-char to_code(type t);
-
-// Converts a wire-format RESP3 type (char) to a resp3 type.
-type to_type(char c);
-
-} // resp3
-} // aedis
-
-#endif // AEDIS_RESP3_TYPE_HPP

aedis/sentinel/command.hpp

@@ -1,78 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_SENTINEL_COMMAND_HPP
-#define AEDIS_SENTINEL_COMMAND_HPP
-
-#include <ostream>
-
-namespace aedis {
-namespace sentinel {
-
-/** \brief Sentinel commands.
- *  \ingroup any
- *
- *  The full list of Sentinel commands can be found at
- *  https://redis.io/topics/sentinel.
- *
- *  \remark This list was created with the help of the \c command
- *  command.
- */
-enum class command {
-   /// https://redis.io/commands/acl
-   acl,
-   /// https://redis.io/commands/auth
-   auth,
-   /// https://redis.io/commands/client
-   client,
-   /// https://redis.io/commands/command
-   command,
-   /// https://redis.io/commands/hello
-   hello,
-   /// https://redis.io/commands/info
-   info,
-   /// https://redis.io/commands/ping
-   ping,
-   /// https://redis.io/commands/psubscribe
-   psubscribe,
-   /// https://redis.io/commands/publish
-   publish,
-   /// https://redis.io/commands/punsubscribe
-   punsubscribe,
-   /// https://redis.io/commands/role
-   role,
-   /// https://redis.io/topics/sentinel
-   sentinel,
-   /// https://redis.io/commands/shutdown
-   shutdown,
-   /// https://redis.io/commands/subscribe
-   subscribe,
-   /// https://redis.io/commands/unsubscribe
-   unsubscribe,
-   /// Unknown/invalid command.
-   invalid,
-};
-
-/** \brief Converts the command to a string.
- *  \ingroup any
- *  \param c The command to convert.
- */
-char const* to_string(command c);
-
-/** \brief Writes the command string to the stream.
- *  \ingroup any
- *  \param os Output stream.
- *  \param c Sentinel command
- */
-std::ostream& operator<<(std::ostream& os, command c);
-
-// Checks whether a command has push response.
-bool has_push_response(command cmd);
-
-} // sentinel
-} // aedis
-
-#endif // AEDIS_SENTINEL_COMMAND_HPP

aedis/sentinel/impl/command.ipp

@@ -1,55 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <aedis/sentinel/command.hpp>
-
-namespace aedis {
-namespace sentinel {
-
-char const* to_string(command c)
-{
-   static char const* table[] = {
-      "ACL",
-      "AUTH",
-      "CLIENT",
-      "COMMAND",
-      "HELLO",
-      "INFO",
-      "PING",
-      "PSUBSCRIBE",
-      "PUBLISH",
-      "PUNSUBSCRIBE",
-      "ROLE",
-      "SENTINEL",
-      "SHUTDOWN",
-      "SUBSCRIBE",
-      "UNSUBSCRIBE",
-   };
-
-   return table[static_cast<int>(c)];
-}
-
-std::ostream& operator<<(std::ostream& os, command c)
-{
-   os << to_string(c);
-   return os;
-}
-
-bool has_push_response(command cmd)
-{
-   switch (cmd) {
-      case command::subscribe:
-      case command::unsubscribe:
-      case command::psubscribe:
-      return true;
-
-      default:
-      return false;
-   }
-}
-
-} // sentinel
-} // aedis

aedis/src.hpp

@@ -1,13 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <aedis/resp3/impl/type.ipp>
-#include <aedis/resp3/detail/impl/parser.ipp>
-#include <aedis/resp3/impl/error.ipp>
-#include <aedis/redis/impl/command.ipp>
-#include <aedis/adapter/impl/error.ipp>
-#include <aedis/sentinel/impl/command.ipp>
-#include <aedis/generic/impl/error.ipp>

benchmarks/CMakeLists.txt

@@ -0,0 +1,20 @@
+
+add_library(benchmarks_options INTERFACE)
+target_link_libraries(benchmarks_options INTERFACE boost_redis_src)
+target_link_libraries(benchmarks_options INTERFACE boost_redis_project_options)
+target_compile_features(benchmarks_options INTERFACE cxx_std_20)
+
+add_executable(echo_server_client cpp/asio/echo_server_client.cpp)
+target_link_libraries(echo_server_client PRIVATE benchmarks_options)
+
+add_executable(echo_server_direct cpp/asio/echo_server_direct.cpp)
+target_link_libraries(echo_server_direct PRIVATE benchmarks_options)
+
+# TODO
+#=======================================================================
+
+#.PHONY: bench
+#bench:
+#	pdflatex --jobname=echo-f0 benchmarks/benchmarks.tex
+#	pdflatex --jobname=echo-f1 benchmarks/benchmarks.tex
+# pdftoppm {input.pdf} {output.file} -png

benchmarks/benchmarks.tex

@@ -0,0 +1,71 @@
+\documentclass{article}
+\usepackage{pgfplots}
+\pgfrealjobname{echo}
+\pgfplotsset{compat=newest}
+
+\begin{document}
+
+\beginpgfgraphicnamed{echo-f0}
+% time ./echo_server_client 1000 5000
+\begin{tikzpicture}[scale=1.0]
+  \begin{axis}[
+    y dir=reverse,
+    %xbar stacked,
+    xbar, xmin=0,
+    %hide x axis,
+    bar shift=0pt,
+    width=15cm, height=6cm, enlarge y limits=0.5,
+    title={TCP Echo Server Performance},
+    xlabel={Seconds},
+    symbolic y coords={Asio,Tokio,Go,Libuv,Nodejs},
+    ytick=data,
+    %bar width=1cm,
+    nodes near coords,
+    nodes near coords align={horizontal},
+    ]
+    \addplot coordinates {
+       (29.5,Asio)
+       (30.7,Tokio)
+       (35.6,Go)
+       (43.6,Libuv)
+       (74.2,Nodejs)
+    };
+  \end{axis}
+\end{tikzpicture}
+\endpgfgraphicnamed
+
+\beginpgfgraphicnamed{echo-f1}
+%$ time ./echo_server_client 1000 1000
+\begin{tikzpicture}[scale=1.0]
+  \begin{axis}[
+    y dir=reverse,
+    %xbar stacked,
+    xbar, xmin=0,
+    %hide x axis,
+    bar shift=0pt,
+    width=12cm, height=6cm, enlarge y limits=0.5,
+     title={TCP Echo Server Performance (over Redis)},
+    xlabel={Seconds},
+    symbolic y coords={Aedis,Rust-rs,Libuv,Node-redis,Go-redis},
+    ytick=data,
+    %bar width=1cm,
+    nodes near coords,
+    nodes near coords align={horizontal},
+    ]
+    \addplot coordinates {
+       (12.6,Aedis)
+       (28.8,Node-redis)
+       (352.4,Go-redis)
+    };
+    %\addplot coordinates {
+    %   (30.0,Asio)
+    %   (90.6,Rust-rs)
+    %   (0.0,Libuv)
+    %   (68.9,Nodejs)
+    %   (0.0,Go)
+    %};
+  \end{axis}
+\end{tikzpicture}
+\endpgfgraphicnamed
+
+\end{document}

benchmarks/c/libuv/README.md

@@ -0,0 +1,7 @@
+This example was taken from
+
+   https://github.com/libuv/libuv/tree/v1.x/docs/code/tcp-echo-server
+
+To build it run, for example
+
+   $ gcc echo_server_direct.c -luv -O2 -o echo_server_direct

benchmarks/c/libuv/echo_server_direct.c

@@ -0,0 +1,87 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <uv.h>
+
+#define DEFAULT_PORT 55555
+#define DEFAULT_BACKLOG 1024
+
+uv_loop_t *loop;
+struct sockaddr_in addr;
+
+typedef struct {
+    uv_write_t req;
+    uv_buf_t buf;
+} write_req_t;
+
+void free_write_req(uv_write_t *req) {
+    write_req_t *wr = (write_req_t*) req;
+    free(wr->buf.base);
+    free(wr);
+}
+
+void alloc_buffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf) {
+    buf->base = (char*) malloc(suggested_size);
+    buf->len = suggested_size;
+}
+
+void on_close(uv_handle_t* handle) {
+    free(handle);
+}
+
+void echo_write(uv_write_t *req, int status) {
+    if (status) {
+        fprintf(stderr, "Write error %s\n", uv_strerror(status));
+    }
+    free_write_req(req);
+}
+
+void echo_read(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf) {
+    if (nread > 0) {
+        write_req_t *req = (write_req_t*) malloc(sizeof(write_req_t));
+        req->buf = uv_buf_init(buf->base, nread);
+        uv_write((uv_write_t*) req, client, &req->buf, 1, echo_write);
+        return;
+    }
+    if (nread < 0) {
+        if (nread != UV_EOF)
+            fprintf(stderr, "Read error %s\n", uv_err_name(nread));
+        uv_close((uv_handle_t*) client, on_close);
+    }
+
+    free(buf->base);
+}
+
+void on_new_connection(uv_stream_t *server, int status) {
+    if (status < 0) {
+        fprintf(stderr, "New connection error %s\n", uv_strerror(status));
+        // error!
+        return;
+    }
+
+    uv_tcp_t *client = (uv_tcp_t*) malloc(sizeof(uv_tcp_t));
+    uv_tcp_init(loop, client);
+    if (uv_accept(server, (uv_stream_t*) client) == 0) {
+        uv_read_start((uv_stream_t*) client, alloc_buffer, echo_read);
+    }
+    else {
+        uv_close((uv_handle_t*) client, on_close);
+    }
+}
+
+int main() {
+    loop = uv_default_loop();
+
+    uv_tcp_t server;
+    uv_tcp_init(loop, &server);
+
+    uv_ip4_addr("0.0.0.0", DEFAULT_PORT, &addr);
+
+    uv_tcp_bind(&server, (const struct sockaddr*)&addr, 0);
+    int r = uv_listen((uv_stream_t*) &server, DEFAULT_BACKLOG, on_new_connection);
+    if (r) {
+        fprintf(stderr, "Listen error %s\n", uv_strerror(r));
+        return 1;
+    }
+    return uv_run(loop, UV_RUN_DEFAULT);
+}

benchmarks/cpp/asio/echo_server_client.cpp

@@ -0,0 +1,67 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <iostream>
+#include <boost/asio.hpp>
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+namespace net = boost::asio;
+
+using net::ip::tcp;
+using tcp_socket = net::use_awaitable_t<>::as_default_on_t<net::ip::tcp::socket>;
+using timer_type = net::use_awaitable_t<>::as_default_on_t<net::steady_timer>;
+
+auto example(boost::asio::ip::tcp::endpoint ep, std::string msg, int n) -> net::awaitable<void>
+{
+   try {
+      auto ex = co_await net::this_coro::executor;
+
+      tcp_socket socket{ex};
+      co_await socket.async_connect(ep);
+
+      std::string buffer;
+      auto dbuffer = net::dynamic_buffer(buffer);
+      for (int i = 0; i < n; ++i) {
+         co_await net::async_write(socket, net::buffer(msg));
+         auto n = co_await net::async_read_until(socket, dbuffer, "\n");
+         //std::printf("> %s", buffer.data());
+         dbuffer.consume(n);
+      }
+
+      //std::printf("Ok: %s", msg.data());
+   } catch (std::exception const& e) {
+      std::cerr << "Error: " << e.what() << std::endl;
+   }
+}
+
+int main(int argc, char* argv[])
+{
+   try {
+      int sessions = 1;
+      int msgs = 1;
+
+      if (argc == 3) {
+         sessions = std::stoi(argv[1]);
+         msgs = std::stoi(argv[2]);
+      }
+
+      net::io_context ioc;
+
+      tcp::resolver resv{ioc};
+      auto const res = resv.resolve("127.0.0.1", "55555");
+      auto ep = *std::begin(res);
+
+      for (int i = 0; i < sessions; ++i)
+         net::co_spawn(ioc, example(ep, "Some message\n", msgs), net::detached);
+
+      ioc.run();
+   } catch (std::exception const& e) {
+      std::cerr << e.what() << std::endl;
+   }
+}
+#else // defined(BOOST_ASIO_HAS_CO_AWAIT)
+auto main() -> int {std::cout << "Requires coroutine support." << std::endl; return 1;}
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

benchmarks/cpp/asio/echo_server_direct.cpp

@@ -0,0 +1,63 @@
+//
+// echo_server.cpp
+// ~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <cstdio>
+#include <iostream>
+#include <boost/asio.hpp>
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+namespace net = boost::asio;
+namespace this_coro = net::this_coro;
+using net::ip::tcp;
+using net::detached;
+using executor_type = net::io_context::executor_type;
+using socket_type = net::basic_stream_socket<net::ip::tcp, executor_type>;
+using tcp_socket = net::use_awaitable_t<executor_type>::as_default_on_t<socket_type>;
+using acceptor_type = net::basic_socket_acceptor<net::ip::tcp, executor_type>;
+using tcp_acceptor = net::use_awaitable_t<executor_type>::as_default_on_t<acceptor_type>;
+using awaitable_type = net::awaitable<void, executor_type>;
+constexpr net::use_awaitable_t<executor_type> use_awaitable;
+
+awaitable_type echo(tcp_socket socket)
+{
+  try {
+     char data[1024];
+     for (;;) {
+        std::size_t n = co_await socket.async_read_some(net::buffer(data), use_awaitable);
+        co_await async_write(socket, net::buffer(data, n), use_awaitable);
+     }
+  } catch (std::exception const&) {
+     //std::printf("echo Exception: %s\n", e.what());
+  }
+}
+
+awaitable_type listener()
+{
+  auto ex = co_await this_coro::executor;
+  tcp_acceptor acceptor(ex, {tcp::v4(), 55555});
+  for (;;) {
+     tcp_socket socket = co_await acceptor.async_accept(use_awaitable);
+     co_spawn(ex, echo(std::move(socket)), detached);
+  }
+}
+
+int main()
+{
+  try {
+     net::io_context io_context{BOOST_ASIO_CONCURRENCY_HINT_UNSAFE_IO};
+     co_spawn(io_context, listener(), detached);
+     io_context.run();
+  } catch (std::exception const& e) {
+     std::printf("Exception: %s\n", e.what());
+  }
+}
+#else // defined(BOOST_ASIO_HAS_CO_AWAIT)
+auto main() -> int {std::cout << "Requires coroutine support." << std::endl; return 1;}
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

benchmarks/go/echo_server_direct.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"runtime"
+)
+
+func echo(conn net.Conn) {
+	buf := make([]byte, 1024)
+	for {
+		n, err := conn.Read(buf)
+                if err != nil {
+                        break;
+                }
+
+                conn.Write(buf[:n])
+                if err != nil {
+                        fmt.Println("ERROR", err)
+                        os.Exit(1)
+                }
+	}
+}
+
+func main() {
+	runtime.GOMAXPROCS(1)
+
+	l, err := net.Listen("tcp", "0.0.0.0:55555")
+	if err != nil {
+		fmt.Println("ERROR", err)
+		os.Exit(1)
+	}
+
+	for {
+		conn, err := l.Accept()
+		if err != nil {
+			fmt.Println("ERROR", err)
+			continue
+		}
+		go echo(conn)
+	}
+}

benchmarks/go/echo_server_over_redis.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+    "context"
+    "github.com/go-redis/redis/v8"
+     "bufio"
+     "fmt"
+     "io"
+     "net"
+     "os"
+)
+
+var ctx = context.Background()
+var rdb = redis.NewClient(&redis.Options{Addr: "db.occase.de:6379", Password: "", DB: 0,})
+
+func echo(conn net.Conn) {
+	r := bufio.NewReader(conn)
+	for {
+		line, err := r.ReadBytes(byte('\n'))
+		switch err {
+		case nil:
+			break
+		case io.EOF:
+		default:
+			fmt.Println("ERROR", err)
+		}
+
+               err2 := rdb.Ping(ctx).Err()
+               if err2 != nil {
+                  fmt.Println("ERROR", err2)
+                  panic(err2)
+               }
+
+	       conn.Write(line)
+	}
+}
+
+func main() {
+	l, err := net.Listen("tcp", "0.0.0.0:55555")
+	if err != nil {
+		fmt.Println("ERROR", err)
+		os.Exit(1)
+	}
+
+	for {
+		conn, err := l.Accept()
+		if err != nil {
+			fmt.Println("ERROR", err)
+			continue
+		}
+
+		go echo(conn)
+	}
+}

benchmarks/java/echo_server_direct/TcpEchoServer.java

@@ -0,0 +1,105 @@
+import java.nio.*;
+import java.nio.channels.*;
+import java.net.*;
+import java.util.*;
+import java.io.IOException;
+
+public class TcpEchoServer {
+
+  public static int DEFAULT_PORT = 55555;
+
+ public static void main(String[] args) {
+int port;
+   try {
+      port = Integer.parseInt(args[0]);
+    }
+
+    catch (Exception ex) {
+      port = DEFAULT_PORT;
+    }
+
+    //System.out.println("Listening for connections on port " + port);
+    ServerSocketChannel serverChannel;
+    Selector selector;
+    try {
+      serverChannel = ServerSocketChannel.open( );
+      ServerSocket ss = serverChannel.socket( );
+      InetSocketAddress address = new InetSocketAddress(port);
+      ss.bind(address);
+      serverChannel.configureBlocking(false);
+      selector = Selector.open( );
+      serverChannel.register(selector, SelectionKey.OP_ACCEPT);
+    }
+    catch (IOException ex) {
+      ex.printStackTrace( );
+      return;
+    }
+   while (true) {
+     try {
+        selector.select( );
+      }
+      catch (IOException ex) {
+        ex.printStackTrace( );
+        break;
+      }
+      Set readyKeys = selector.selectedKeys( );
+      Iterator iterator = readyKeys.iterator( );
+      while (iterator.hasNext( )) {
+       SelectionKey key = (SelectionKey) iterator.next( );
+        iterator.remove( );
+        try {
+          if (key.isAcceptable( )) {
+            ServerSocketChannel server = (ServerSocketChannel ) key.channel( );
+            SocketChannel client = server.accept( );
+            //System.out.println("Accepted connection from " + client);
+            client.configureBlocking(false);
+            SelectionKey clientKey = client.register(
+              selector, SelectionKey.OP_WRITE | SelectionKey.OP_READ);
+            ByteBuffer buffer = ByteBuffer.allocate(100);
+            clientKey.attach(buffer);
+           //System.out.println(buffer.toString());
+
+          }
+
+          if (key.isReadable( )) {
+            SocketChannel client = (SocketChannel) key.channel( );
+            ByteBuffer output = (ByteBuffer) key.attachment( );
+            client.read(output);
+          }
+
+          if (key.isWritable( )) {
+            SocketChannel client = (SocketChannel) key.channel( );
+            ByteBuffer output = (ByteBuffer) key.attachment( );
+            output.flip( );
+            client.write(output);
+            output.compact( );
+
+    }
+
+        }
+
+        catch (IOException ex) {
+          key.cancel( );
+          try {
+            key.channel().close();
+        }
+
+          catch (IOException cex) {}
+
+        }
+
+
+
+      }
+
+
+
+    }
+
+
+
+  }
+
+
+
+}

benchmarks/nodejs/README.txt

@@ -0,0 +1,4 @@
+
+$ npm install
+
+$ node echo_server_over_redis.js

benchmarks/nodejs/echo_server_direct/echo_server_direct.js

@@ -0,0 +1,7 @@
+var net = require('net');
+
+net.createServer(function(socket){
+    socket.on('data', function(data){
+        socket.write(data.toString())
+    });
+}).listen(55555);

benchmarks/nodejs/echo_server_direct/package.json

@@ -0,0 +1,2 @@
+{
+}

benchmarks/nodejs/echo_server_over_redis/echo_server_over_redis.js

@@ -0,0 +1,13 @@
+import { createClient } from 'redis';
+import * as net from 'net';
+
+const client = createClient({url: 'redis://aedis.occase.de:63799' });
+client.on('error', (err) => console.log('Redis Client Error', err));
+await client.connect();
+
+net.createServer(function(socket){
+   socket.on('data', async function(data) {
+      const value = await client.ping(data.toString());
+      socket.write(data)
+   });
+}).listen(55555);

benchmarks/nodejs/echo_server_over_redis/package-lock.json

@@ -0,0 +1,169 @@
+{
+   "name": "echo_server_over_redis",
+   "lockfileVersion": 2,
+   "requires": true,
+   "packages": {
+      "": {
+         "dependencies": {
+            "redis": "^4.2.0"
+         }
+      },
+      "node_modules/@redis/bloom": {
+         "version": "1.0.2",
+         "resolved": "https://registry.npmjs.org/@redis/bloom/-/bloom-1.0.2.tgz",
+         "integrity": "sha512-EBw7Ag1hPgFzdznK2PBblc1kdlj5B5Cw3XwI9/oG7tSn85/HKy3X9xHy/8tm/eNXJYHLXHJL/pkwBpFMVVefkw==",
+         "peerDependencies": {
+            "@redis/client": "^1.0.0"
+         }
+      },
+      "node_modules/@redis/client": {
+         "version": "1.2.0",
+         "resolved": "https://registry.npmjs.org/@redis/client/-/client-1.2.0.tgz",
+         "integrity": "sha512-a8Nlw5fv2EIAFJxTDSSDVUT7yfBGpZO96ybZXzQpgkyLg/dxtQ1uiwTc0EGfzg1mrPjZokeBSEGTbGXekqTNOg==",
+         "dependencies": {
+            "cluster-key-slot": "1.1.0",
+            "generic-pool": "3.8.2",
+            "yallist": "4.0.0"
+         },
+         "engines": {
+            "node": ">=14"
+         }
+      },
+      "node_modules/@redis/graph": {
+         "version": "1.0.1",
+         "resolved": "https://registry.npmjs.org/@redis/graph/-/graph-1.0.1.tgz",
+         "integrity": "sha512-oDE4myMCJOCVKYMygEMWuriBgqlS5FqdWerikMoJxzmmTUErnTRRgmIDa2VcgytACZMFqpAOWDzops4DOlnkfQ==",
+         "peerDependencies": {
+            "@redis/client": "^1.0.0"
+         }
+      },
+      "node_modules/@redis/json": {
+         "version": "1.0.3",
+         "resolved": "https://registry.npmjs.org/@redis/json/-/json-1.0.3.tgz",
+         "integrity": "sha512-4X0Qv0BzD9Zlb0edkUoau5c1bInWSICqXAGrpwEltkncUwcxJIGEcVryZhLgb0p/3PkKaLIWkjhHRtLe9yiA7Q==",
+         "peerDependencies": {
+            "@redis/client": "^1.0.0"
+         }
+      },
+      "node_modules/@redis/search": {
+         "version": "1.0.6",
+         "resolved": "https://registry.npmjs.org/@redis/search/-/search-1.0.6.tgz",
+         "integrity": "sha512-pP+ZQRis5P21SD6fjyCeLcQdps+LuTzp2wdUbzxEmNhleighDDTD5ck8+cYof+WLec4csZX7ks+BuoMw0RaZrA==",
+         "peerDependencies": {
+            "@redis/client": "^1.0.0"
+         }
+      },
+      "node_modules/@redis/time-series": {
+         "version": "1.0.3",
+         "resolved": "https://registry.npmjs.org/@redis/time-series/-/time-series-1.0.3.tgz",
+         "integrity": "sha512-OFp0q4SGrTH0Mruf6oFsHGea58u8vS/iI5+NpYdicaM+7BgqBZH8FFvNZ8rYYLrUO/QRqMq72NpXmxLVNcdmjA==",
+         "peerDependencies": {
+            "@redis/client": "^1.0.0"
+         }
+      },
+      "node_modules/cluster-key-slot": {
+         "version": "1.1.0",
+         "resolved": "https://registry.npmjs.org/cluster-key-slot/-/cluster-key-slot-1.1.0.tgz",
+         "integrity": "sha512-2Nii8p3RwAPiFwsnZvukotvow2rIHM+yQ6ZcBXGHdniadkYGZYiGmkHJIbZPIV9nfv7m/U1IPMVVcAhoWFeklw==",
+         "engines": {
+            "node": ">=0.10.0"
+         }
+      },
+      "node_modules/generic-pool": {
+         "version": "3.8.2",
+         "resolved": "https://registry.npmjs.org/generic-pool/-/generic-pool-3.8.2.tgz",
+         "integrity": "sha512-nGToKy6p3PAbYQ7p1UlWl6vSPwfwU6TMSWK7TTu+WUY4ZjyZQGniGGt2oNVvyNSpyZYSB43zMXVLcBm08MTMkg==",
+         "engines": {
+            "node": ">= 4"
+         }
+      },
+      "node_modules/redis": {
+         "version": "4.2.0",
+         "resolved": "https://registry.npmjs.org/redis/-/redis-4.2.0.tgz",
+         "integrity": "sha512-bCR0gKVhIXFg8zCQjXEANzgI01DDixtPZgIUZHBCmwqixnu+MK3Tb2yqGjh+HCLASQVVgApiwhNkv+FoedZOGQ==",
+         "dependencies": {
+            "@redis/bloom": "1.0.2",
+            "@redis/client": "1.2.0",
+            "@redis/graph": "1.0.1",
+            "@redis/json": "1.0.3",
+            "@redis/search": "1.0.6",
+            "@redis/time-series": "1.0.3"
+         }
+      },
+      "node_modules/yallist": {
+         "version": "4.0.0",
+         "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+         "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+      }
+   },
+   "dependencies": {
+      "@redis/bloom": {
+         "version": "1.0.2",
+         "resolved": "https://registry.npmjs.org/@redis/bloom/-/bloom-1.0.2.tgz",
+         "integrity": "sha512-EBw7Ag1hPgFzdznK2PBblc1kdlj5B5Cw3XwI9/oG7tSn85/HKy3X9xHy/8tm/eNXJYHLXHJL/pkwBpFMVVefkw==",
+         "requires": {}
+      },
+      "@redis/client": {
+         "version": "1.2.0",
+         "resolved": "https://registry.npmjs.org/@redis/client/-/client-1.2.0.tgz",
+         "integrity": "sha512-a8Nlw5fv2EIAFJxTDSSDVUT7yfBGpZO96ybZXzQpgkyLg/dxtQ1uiwTc0EGfzg1mrPjZokeBSEGTbGXekqTNOg==",
+         "requires": {
+            "cluster-key-slot": "1.1.0",
+            "generic-pool": "3.8.2",
+            "yallist": "4.0.0"
+         }
+      },
+      "@redis/graph": {
+         "version": "1.0.1",
+         "resolved": "https://registry.npmjs.org/@redis/graph/-/graph-1.0.1.tgz",
+         "integrity": "sha512-oDE4myMCJOCVKYMygEMWuriBgqlS5FqdWerikMoJxzmmTUErnTRRgmIDa2VcgytACZMFqpAOWDzops4DOlnkfQ==",
+         "requires": {}
+      },
+      "@redis/json": {
+         "version": "1.0.3",
+         "resolved": "https://registry.npmjs.org/@redis/json/-/json-1.0.3.tgz",
+         "integrity": "sha512-4X0Qv0BzD9Zlb0edkUoau5c1bInWSICqXAGrpwEltkncUwcxJIGEcVryZhLgb0p/3PkKaLIWkjhHRtLe9yiA7Q==",
+         "requires": {}
+      },
+      "@redis/search": {
+         "version": "1.0.6",
+         "resolved": "https://registry.npmjs.org/@redis/search/-/search-1.0.6.tgz",
+         "integrity": "sha512-pP+ZQRis5P21SD6fjyCeLcQdps+LuTzp2wdUbzxEmNhleighDDTD5ck8+cYof+WLec4csZX7ks+BuoMw0RaZrA==",
+         "requires": {}
+      },
+      "@redis/time-series": {
+         "version": "1.0.3",
+         "resolved": "https://registry.npmjs.org/@redis/time-series/-/time-series-1.0.3.tgz",
+         "integrity": "sha512-OFp0q4SGrTH0Mruf6oFsHGea58u8vS/iI5+NpYdicaM+7BgqBZH8FFvNZ8rYYLrUO/QRqMq72NpXmxLVNcdmjA==",
+         "requires": {}
+      },
+      "cluster-key-slot": {
+         "version": "1.1.0",
+         "resolved": "https://registry.npmjs.org/cluster-key-slot/-/cluster-key-slot-1.1.0.tgz",
+         "integrity": "sha512-2Nii8p3RwAPiFwsnZvukotvow2rIHM+yQ6ZcBXGHdniadkYGZYiGmkHJIbZPIV9nfv7m/U1IPMVVcAhoWFeklw=="
+      },
+      "generic-pool": {
+         "version": "3.8.2",
+         "resolved": "https://registry.npmjs.org/generic-pool/-/generic-pool-3.8.2.tgz",
+         "integrity": "sha512-nGToKy6p3PAbYQ7p1UlWl6vSPwfwU6TMSWK7TTu+WUY4ZjyZQGniGGt2oNVvyNSpyZYSB43zMXVLcBm08MTMkg=="
+      },
+      "redis": {
+         "version": "4.2.0",
+         "resolved": "https://registry.npmjs.org/redis/-/redis-4.2.0.tgz",
+         "integrity": "sha512-bCR0gKVhIXFg8zCQjXEANzgI01DDixtPZgIUZHBCmwqixnu+MK3Tb2yqGjh+HCLASQVVgApiwhNkv+FoedZOGQ==",
+         "requires": {
+            "@redis/bloom": "1.0.2",
+            "@redis/client": "1.2.0",
+            "@redis/graph": "1.0.1",
+            "@redis/json": "1.0.3",
+            "@redis/search": "1.0.6",
+            "@redis/time-series": "1.0.3"
+         }
+      },
+      "yallist": {
+         "version": "4.0.0",
+         "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+         "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+      }
+   }
+}

benchmarks/nodejs/echo_server_over_redis/package.json

@@ -0,0 +1,6 @@
+{
+   "type": "module",
+   "dependencies": {
+      "redis": "^4.2.0"
+   }
+}

benchmarks/rust/echo_server_direct/Cargo.lock

@@ -0,0 +1,309 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "bytes"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4872d67bab6358e59559027aa3b9157c53d9358c51423c17554809a8858e0f8"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "echo_server_direct"
+version = "0.1.0"
+dependencies = [
+ "tokio",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.126"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
+
+[[package]]
+name = "lock_api"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "327fa5b6a6940e4699ec49a9beae1ea4845c6bab9314e4f84ac68742139d8c53"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
+[[package]]
+name = "log"
+version = "0.4.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
+[[package]]
+name = "mio"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57ee1c23c7c63b0c9250c339ffdc69255f110b298b901b9f6c82547b7b87caaf"
+dependencies = [
+ "libc",
+ "log",
+ "wasi",
+ "windows-sys",
+]
+
+[[package]]
+name = "num_cpus"
+version = "1.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19e64526ebdee182341572e50e9ad03965aa510cd94427a4549448f285e957a1"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18a6dbe30758c9f83eb00cbea4ac95966305f5a7772f3f42ebfc7fc7eddbd8e1"
+
+[[package]]
+name = "parking_lot"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09a279cbf25cb0757810394fbc1e359949b59e348145c643a939a525692e6929"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-sys",
+]
+
+[[package]]
+name = "pin-project-lite"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.39"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c54b25569025b7fc9651de43004ae593a75ad88543b17178aa5e1b9c4f15f56f"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f53dc8cf16a769a6f677e09e7ff2cd4be1ea0f48754aac39520536962011de0d"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62f25bc4c7e55e0b0b7a1d43fb893f4fa1361d0abe38b9ce4f323c2adfe6ef42"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
+[[package]]
+name = "signal-hook-registry"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e51e73328dc4ac0c7ccbda3a494dfa03df1de2f46018127f60c693f2648455b0"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fd0db749597d91ff862fd1d55ea87f7855a744a8425a64695b6fca237d1dad1"
+
+[[package]]
+name = "socket2"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "66d72b759436ae32898a2af0a14218dbf55efde3feeb170eb623637db85ee1e0"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.98"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c50aef8a904de4c23c788f104b7dddc7d6f79c647c7c8ce4cc8f73eb0ca773dd"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "tokio"
+version = "1.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57aec3cfa4c296db7255446efb4928a6be304b431a806216105542a67b6ca82e"
+dependencies = [
+ "autocfg",
+ "bytes",
+ "libc",
+ "memchr",
+ "mio",
+ "num_cpus",
+ "once_cell",
+ "parking_lot",
+ "pin-project-lite",
+ "signal-hook-registry",
+ "socket2",
+ "tokio-macros",
+ "winapi",
+]
+
+[[package]]
+name = "tokio-macros"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9724f9a975fb987ef7a3cd9be0350edcbe130698af5b8f7a631e23d42d052484"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5bd2fe26506023ed7b5e1e315add59d6f584c621d037f9368fea9cfb988f368c"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows-sys"
+version = "0.36.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea04155a16a59f9eab786fe12a4a450e75cdb175f9e0d80da1e17db09f55b8d2"
+dependencies = [
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.36.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9bb8c3fd39ade2d67e9874ac4f3db21f0d710bee00fe7cab16949ec184eeaa47"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.36.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "180e6ccf01daf4c426b846dfc66db1fc518f074baa793aa7d9b9aaeffad6a3b6"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.36.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2e7917148b2812d1eeafaeb22a97e4813dfa60a3f8f78ebe204bcc88f12f024"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.36.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4dcd171b8776c41b97521e5da127a2d86ad280114807d0b2ab1e462bc764d9e1"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.36.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"

benchmarks/rust/echo_server_direct/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "echo_server_direct"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tokio = { version = "1.0", features = ["full"] }

benchmarks/rust/echo_server_direct/src/main.rs

@@ -0,0 +1,35 @@
+use tokio::net::TcpListener;
+use tokio::io::AsyncReadExt;
+use tokio::io::AsyncWriteExt;
+
+#[tokio::main(flavor = "current_thread")]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let listener = TcpListener::bind("127.0.0.1:55555").await?;
+
+    loop {
+        let (mut socket, _) = listener.accept().await?;
+
+        tokio::spawn(async move {
+            let mut buf = [0; 1024];
+
+            // In a loop, read data from the socket and write the data back.
+            loop {
+                let n = match socket.read(&mut buf).await {
+                    // socket closed
+                    Ok(n) if n == 0 => return,
+                    Ok(n) => n,
+                    Err(e) => {
+                        eprintln!("failed to read from socket; err = {:?}", e);
+                        return;
+                    }
+                };
+
+                // Write the data back
+                if let Err(e) = socket.write_all(&buf[0..n]).await {
+                    eprintln!("failed to write to socket; err = {:?}", e);
+                    return;
+                }
+            }
+        });
+    }
+}

benchmarks/rust/echo_server_over_redis/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "echo_server_over_redis"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tokio = { version = "1.16.1", features = ["full"] }
+redis = { version = "0.21.5", features = ["tokio-comp"] }
+futures = "0.3"

benchmarks/rust/echo_server_over_redis/src/main.rs

@@ -0,0 +1,44 @@
+use tokio::net::TcpListener;
+use tokio::io::AsyncReadExt;
+use tokio::io::AsyncWriteExt;
+use tokio::sync::Mutex;
+use std::sync::{Arc};
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let listener = TcpListener::bind("127.0.0.1:55555").await?;
+    let client = redis::Client::open("redis://db.occase.de/").unwrap();
+    let con = Arc::new(Mutex::new(client.get_async_connection().await?));
+
+    loop {
+        let conn = Arc::clone(&con);
+        let (mut socket, _) = listener.accept().await?;
+
+        tokio::spawn(async move {
+            let mut buf = [0; 1024];
+
+            loop {
+                let n = match socket.read(&mut buf).await {
+                    Ok(n) if n == 0 => return,
+                    Ok(n) => n,
+                    Err(e) => {
+                        eprintln!("failed to read from socket; err = {:?}", e);
+                        return;
+                    }
+                };
+
+                let mut local_conn = conn.lock().await;
+
+                let result =
+                    redis::cmd("PING")
+                    .arg(&buf[0..n])
+                    .query_async::<redis::aio::Connection, String>(&mut local_conn).await.unwrap();
+
+                if let Err(e) = socket.write_all(result.as_bytes()).await {
+                    eprintln!("failed to write to socket; err = {:?}", e);
+                    return;
+                }
+            }
+        });
+    }
+}

configure.ac

@@ -1,27 +0,0 @@
-AC_PREREQ([2.69])
-AC_INIT([Aedis], [0.1.2], [mzimbres@gmail.com])
-AC_CONFIG_MACRO_DIR([m4])
-#AC_CONFIG_SRCDIR([src/aedis.cpp])
-AC_CONFIG_HEADERS([config.h])
-AM_INIT_AUTOMAKE([-Wall foreign])
-
-# Checks for programs.
-AC_PROG_CXX
-AC_PROG_INSTALL
-AC_PROG_LN_S
-AC_PROG_RANLIB
-AM_PROG_AR
-
-AX_BOOST_BASE([1.78],, AC_MSG_ERROR[Boost not found])
-
-AC_CHECK_HEADER_STDBOOL
-AC_TYPE_UINT64_T
-AC_CHECK_TYPES([ptrdiff_t])
-
-AX_CXX_COMPILE_STDCXX(14, , mandatory)
-AX_CXX_COMPILE_STDCXX(20, , optional)
-
-AM_CONDITIONAL(HAVE_CXX20,[test x$HAVE_CXX20 == x1])
-
-AC_CONFIG_FILES([Makefile doc/Doxyfile])
-AC_OUTPUT

doc/DoxygenLayout.xml

@@ -3,7 +3,7 @@
   <!-- Navigation index tabs for HTML output -->
   <navindex>
     <tab type="mainpage" visible="yes" title="Contents"/>
-    <tab type="pages" visible="no" title="" intro=""/>
+    <tab type="pages" visible="yes" title="" intro=""/>
     <tab type="modules" visible="no" title="Reference" intro=""/>
     <tab type="namespaces" visible="no" title="">
       <tab type="namespacelist" visible="yes" title="" intro=""/>

doc/Jamfile

@@ -0,0 +1,87 @@
+project redis/doc ;
+
+import doxygen ;
+import path ;
+import sequence ;
+
+# All paths must be absolute to work well with the Doxygen rules.
+path-constant this_dir : . ;
+path-constant target_dir : html ;
+path-constant redis_root_dir : .. ;
+path-constant include_dir : ../include ;
+path-constant examples_dir : ../example ;
+path-constant readme : ../README.md ;
+path-constant layout_file : DoxygenLayout.xml ;
+
+local stylesheet_files = [ path.glob $(this_dir) : *.css ] ;
+local includes = [ path.glob-tree $(include_dir) : *.hpp *.cpp ] ;
+local examples = [ path.glob-tree $(examples_dir) : *.hpp *.cpp ] ;
+
+# If passed directly, several HTML_EXTRA_STYLESHEET tags are generated,
+# which is not correct.
+local stylesheet_arg = [ sequence.join "\"$(stylesheet_files)\"" : " " ] ;
+
+# The doxygen rule requires the target name to end in .html to generate HTML files
+doxygen doc.html
+    :
+        $(includes) $(examples) $(readme)
+    :
+        <doxygen:param>"PROJECT_NAME=Boost.Redis"
+        <doxygen:param>PROJECT_NUMBER="1.4.2"
+        <doxygen:param>PROJECT_BRIEF="A redis client library"
+        <doxygen:param>"STRIP_FROM_PATH=\"$(redis_root_dir)\""
+        <doxygen:param>"STRIP_FROM_INC_PATH=\"$(include_dir)\""
+        <doxygen:param>BUILTIN_STL_SUPPORT=YES
+        <doxygen:param>INLINE_SIMPLE_STRUCTS=YES
+        <doxygen:param>HIDE_UNDOC_MEMBERS=YES
+        <doxygen:param>HIDE_UNDOC_CLASSES=YES
+        <doxygen:param>SHOW_HEADERFILE=YES
+        <doxygen:param>SORT_BRIEF_DOCS=YES
+        <doxygen:param>SORT_MEMBERS_CTORS_1ST=YES
+        <doxygen:param>SHOW_FILES=NO
+        <doxygen:param>SHOW_NAMESPACES=NO
+        <doxygen:param>"LAYOUT_FILE=\"$(layout_file)\""
+        <doxygen:param>WARN_IF_INCOMPLETE_DOC=YES
+        <doxygen:param>FILE_PATTERNS="*.hpp *.cpp"
+        <doxygen:param>EXCLUDE_SYMBOLS=std
+        <doxygen:param>"USE_MDFILE_AS_MAINPAGE=\"$(readme)\""
+        <doxygen:param>SOURCE_BROWSER=YES
+        <doxygen:param>"HTML_EXTRA_STYLESHEET=$(stylesheet_arg)"
+        <doxygen:param>HTML_TIMESTAMP=YES
+        <doxygen:param>GENERATE_TREEVIEW=YES
+        <doxygen:param>FULL_SIDEBAR=NO
+        <doxygen:param>ENUM_VALUES_PER_LINE=0
+        <doxygen:param>OBFUSCATE_EMAILS=YES
+        <doxygen:param>USE_MATHJAX=YES
+        <doxygen:param>MATHJAX_VERSION=MathJax_2
+        <doxygen:param>MATHJAX_RELPATH="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/"
+        <doxygen:param>MACRO_EXPANSION=YES
+        <doxygen:param>HAVE_DOT=NO
+        <doxygen:param>CLASS_GRAPH=NO
+        <doxygen:param>DIRECTORY_GRAPH=NO
+    ;
+
+explicit doc.html ;
+
+# The doxygen rule only informs b2 about the main HTML file, and not about
+# all the doc directory that gets generated. Using the install rule copies
+# only a single file, which is incorrect. This is a workaround to copy
+# the generated docs to the doc/html directory, where they should be.
+make copyhtml.tag : doc.html : @copy_html_dir ;
+explicit copyhtml.tag ;
+actions copy_html_dir
+{
+    rm -rf $(target_dir)
+    mkdir -p $(target_dir)
+    cp -r $(<:D)/html/doc/* $(target_dir)/
+    echo "Stamped" > "$(<)"
+}
+
+# These are used to inform the build system of the
+# means to build the integrated and stand-alone docs.
+
+alias boostdoc ;
+explicit boostdoc ;
+
+alias boostrelease : copyhtml.tag ;
+explicit boostrelease ;

doc/aedis.css

@@ -1,30 +0,0 @@
-/* Doxygen HTML_EXTRA_STYLESHEET */
-
-div.contents {
-    max-width: 100em;
-    margin-right: 5em;
-    margin-left: 5em;
-}
-
-.ui-resizable-e {
-  background-image:url("splitbar.png");
-  background-size:100%;
-  background-repeat:repeat-y;
-  background-attachment: scroll;
-  cursor:ew-resize;
-  height:100%;
-  right:0;
-  top:0;
-  width:1px;
-}
-
-.pyrootbox {
-  border: 1px solid #879ecb;
-  background-color: #f9fafc;
-  padding: 15px;
-}
-
-code
-{
-    background-color:#f0e9ce;
-}

doc/doxygen-awesome-sidebar-only.css

@@ -0,0 +1,115 @@
+/**
+
+Doxygen Awesome
+https://github.com/jothepro/doxygen-awesome-css
+
+MIT License
+
+Copyright (c) 2021 jothepro
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+ */
+
+html {
+    /* side nav width. MUST be = `TREEVIEW_WIDTH`.
+     * Make sure it is wide enough to contain the page title (logo + title + version)
+     */
+    --side-nav-fixed-width: 335px;
+    --menu-display: none;
+
+    --top-height: 120px;
+    --toc-sticky-top: -25px;
+    --toc-max-height: calc(100vh - 2 * var(--spacing-medium) - 25px);
+}
+
+#projectname {
+    white-space: nowrap;
+}
+
+
+@media screen and (min-width: 768px) {
+    html {
+        --searchbar-background: var(--page-background-color);
+    }
+
+    #side-nav {
+        min-width: var(--side-nav-fixed-width);
+        max-width: var(--side-nav-fixed-width);
+        top: var(--top-height);
+        overflow: visible;
+    }
+
+    #nav-tree, #side-nav {
+        height: calc(100vh - var(--top-height)) !important;
+    }
+
+    #nav-tree {
+        padding: 0;
+    }
+
+    #top {
+        display: block;
+        border-bottom: none;
+        height: var(--top-height);
+        margin-bottom: calc(0px - var(--top-height));
+        max-width: var(--side-nav-fixed-width);
+        overflow: hidden;
+        background: var(--side-nav-background);
+    }
+    #main-nav {
+        float: left;
+        padding-right: 0;
+    }
+
+    .ui-resizable-handle {
+        cursor: default;
+        width: 1px !important;
+        box-shadow: 0 calc(-2 * var(--top-height)) 0 0 var(--separator-color);
+    }
+
+    #nav-path {
+        position: fixed;
+        right: 0;
+        left: var(--side-nav-fixed-width);
+        bottom: 0;
+        width: auto;
+    }
+
+    #doc-content {
+        height: calc(100vh - 31px) !important;
+        padding-bottom: calc(3 * var(--spacing-large));
+        padding-top: calc(var(--top-height) - 80px);
+        box-sizing: border-box;
+        margin-left: var(--side-nav-fixed-width) !important;
+    }
+
+    #MSearchBox {
+        width: calc(var(--side-nav-fixed-width) - calc(2 * var(--spacing-medium)));
+    }
+
+    #MSearchField {
+        width: calc(var(--side-nav-fixed-width) - calc(2 * var(--spacing-medium)) - 65px);
+    }
+
+    #MSearchResultsWindow {
+        left: var(--spacing-medium) !important;
+        right: auto;
+    }
+}

doc/htmlfooter.html

@@ -1,19 +0,0 @@
-<!-- HTML footer for doxygen 1.8.14-->
-<!-- start footer part -->
-<!--BEGIN GENERATE_TREEVIEW-->
-<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
-  <ul>
-    $navpath
-    <li class="footer">
-    Aedis 1.0.0 - Reference Guide generated on $datetime using Doxygen $doxygenversion &#160;&#160;
-    <img class="footer" src="rootlogo_s.gif" alt="root"/></li>
-  </ul>
-</div>
-<!--END GENERATE_TREEVIEW-->
-<!--BEGIN !GENERATE_TREEVIEW-->
-<hr class="footer"/><address class="footer">
-Author: Marcelo Zimbres Silva.
-</address>
-<!--END !GENERATE_TREEVIEW-->
-</body>
-</html>

doc/htmlheader.html

@@ -1,34 +0,0 @@
-<!-- HTML header for doxygen 1.8.14-->
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml">
-<head>
-<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
-<meta http-equiv="X-UA-Compatible" content="IE=9"/>
-<meta name="generator" content="Doxygen $doxygenversion"/>
-<meta name="viewport" content="width=device-width, initial-scale=1"/>
-<!--BEGIN PROJECT_NAME--><title>$projectname: $title</title><!--END PROJECT_NAME-->
-<!--BEGIN !PROJECT_NAME--><title>$title</title><!--END !PROJECT_NAME-->
-<link href="$relpath^tabs.css" rel="stylesheet" type="text/css"/>
-<script type="text/javascript" src="$relpath^jquery.js"></script>
-<script type="text/javascript" src="$relpath^dynsections.js"></script>
-$search
-<link href="$relpath^$stylesheet" rel="stylesheet" type="text/css" />
-$extrastylesheet
-
-</head>
-<body>
-<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
-
-<!--BEGIN TITLEAREA-->
-<div id="titlearea">
-<table bgcolor="#346295" cellspacing="0" cellpadding="6">
- <tbody>
- <tr>
-  <td valign="middle" style="color: #FFFFFF" nowrap="nowrap"><font size="6">$projectname $projectnumber</font> &#160; <br> $projectbrief </td>
-  <td style="width:100%"> $searchbox </td>
- </tr>
- </tbody>
-</table>
-</div>
-<!--END TITLEAREA-->
-<!-- end header part -->

example/CMakeLists.txt

@@ -0,0 +1,49 @@
+add_library(examples_main STATIC main.cpp)
+target_compile_features(examples_main PRIVATE cxx_std_20)
+target_link_libraries(examples_main PRIVATE boost_redis_project_options)
+
+macro(make_example EXAMPLE_NAME STANDARD)
+  add_executable(${EXAMPLE_NAME} ${EXAMPLE_NAME}.cpp)
+  target_link_libraries(${EXAMPLE_NAME} PRIVATE boost_redis_src)
+  target_link_libraries(${EXAMPLE_NAME} PRIVATE boost_redis_project_options)
+  target_compile_features(${EXAMPLE_NAME} PRIVATE cxx_std_${STANDARD})
+  if (${STANDARD} STREQUAL "20")
+    target_link_libraries(${EXAMPLE_NAME} PRIVATE examples_main)
+  endif()
+endmacro()
+
+macro(make_testable_example EXAMPLE_NAME STANDARD)
+  make_example(${EXAMPLE_NAME} ${STANDARD})
+  if (BOOST_REDIS_INTEGRATION_TESTS)
+    add_test(${EXAMPLE_NAME} ${EXAMPLE_NAME})
+  endif()
+endmacro()
+
+make_testable_example(cpp17_intro 17)
+make_testable_example(cpp17_intro_sync 17)
+
+make_testable_example(cpp20_intro 20)
+make_testable_example(cpp20_containers 20)
+make_testable_example(cpp20_json 20)
+make_testable_example(cpp20_intro_tls 20)
+
+make_example(cpp20_subscriber 20)
+make_example(cpp20_streams 20)
+make_example(cpp20_echo_server 20)
+make_example(cpp20_resolve_with_sentinel 20)
+
+# We test the protobuf example only on gcc.
+if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+  find_package(Protobuf)
+  if (Protobuf_FOUND)
+    protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS person.proto)
+    make_testable_example(cpp20_protobuf 20)
+    target_sources(cpp20_protobuf PUBLIC ${PROTO_SRCS} ${PROTO_HDRS})
+    target_link_libraries(cpp20_protobuf PRIVATE  ${Protobuf_LIBRARIES})
+    target_include_directories(cpp20_protobuf PUBLIC ${Protobuf_INCLUDE_DIRS} ${CMAKE_CURRENT_BINARY_DIR})
+  endif()
+endif()
+
+if (NOT MSVC)
+  make_example(cpp20_chat_room 20)
+endif()

example/cpp17_intro.cpp

@@ -0,0 +1,50 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/asio/detached.hpp>
+#include <iostream>
+
+namespace asio = boost::asio;
+using boost::redis::connection;
+using boost::redis::request;
+using boost::redis::response;
+using boost::redis::config;
+
+auto main(int argc, char * argv[]) -> int
+{
+   try {
+      config cfg;
+
+      if (argc == 3) {
+         cfg.addr.host = argv[1];
+         cfg.addr.port = argv[2];
+      }
+
+      request req;
+      req.push("PING", "Hello world");
+
+      response<std::string> resp;
+
+      asio::io_context ioc;
+      connection conn{ioc};
+
+      conn.async_run(cfg, {}, asio::detached);
+
+      conn.async_exec(req, resp, [&](auto ec, auto) {
+         if (!ec)
+            std::cout << "PING: " << std::get<0>(resp).value() << std::endl;
+         conn.cancel();
+      });
+
+      ioc.run();
+
+   } catch (std::exception const& e) {
+      std::cerr << "Error: " << e.what() << std::endl;
+      return 1;
+   }
+}
+

example/cpp17_intro_sync.cpp

@@ -0,0 +1,43 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include "sync_connection.hpp"
+
+#include <string>
+#include <iostream>
+
+using boost::redis::sync_connection;
+using boost::redis::request;
+using boost::redis::response;
+using boost::redis::config;
+
+auto main(int argc, char * argv[]) -> int
+{
+   try {
+      config cfg;
+
+      if (argc == 3) {
+         cfg.addr.host = argv[1];
+         cfg.addr.port = argv[2];
+      }
+
+      sync_connection conn;
+      conn.run(cfg);
+
+      request req;
+      req.push("PING");
+
+      response<std::string> resp;
+
+      conn.exec(req, resp);
+      conn.stop();
+
+      std::cout << "Response: " << std::get<0>(resp).value() << std::endl;
+
+   } catch (std::exception const& e) {
+      std::cerr << e.what() << std::endl;
+   }
+}

example/cpp20_chat_room.cpp

@@ -0,0 +1,108 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/asio/deferred.hpp>
+#include <boost/asio/signal_set.hpp>
+#include <boost/asio/co_spawn.hpp>
+#include <boost/asio/detached.hpp>
+#include <boost/asio/redirect_error.hpp>
+#include <boost/asio/posix/stream_descriptor.hpp>
+#include <unistd.h>
+#include <iostream>
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+#if defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)
+
+namespace asio = boost::asio;
+using stream_descriptor = asio::deferred_t::as_default_on_t<asio::posix::stream_descriptor>;
+using signal_set = asio::deferred_t::as_default_on_t<asio::signal_set>;
+using boost::asio::async_read_until;
+using boost::asio::awaitable;
+using boost::asio::co_spawn;
+using boost::asio::consign;
+using boost::asio::deferred;
+using boost::asio::detached;
+using boost::asio::dynamic_buffer;
+using boost::asio::redirect_error;
+using boost::asio::use_awaitable;
+using boost::redis::config;
+using boost::redis::connection;
+using boost::redis::generic_response;
+using boost::redis::ignore;
+using boost::redis::request;
+using boost::system::error_code;
+using namespace std::chrono_literals;
+
+// Chat over Redis pubsub. To test, run this program from multiple
+// terminals and type messages to stdin.
+
+auto
+receiver(std::shared_ptr<connection> conn) -> awaitable<void>
+{
+   request req;
+   req.push("SUBSCRIBE", "channel");
+
+   generic_response resp;
+   conn->set_receive_response(resp);
+
+   while (conn->will_reconnect()) {
+
+      // Subscribe to channels.
+      co_await conn->async_exec(req, ignore, deferred);
+
+      // Loop reading Redis push messages.
+      for (error_code ec;;) {
+         co_await conn->async_receive(redirect_error(use_awaitable, ec));
+         if (ec)
+            break; // Connection lost, break so we can reconnect to channels.
+         std::cout
+            << resp.value().at(1).value
+            << " " << resp.value().at(2).value
+            << " " << resp.value().at(3).value
+            << std::endl;
+         resp.value().clear();
+      }
+   }
+}
+
+// Publishes stdin messages to a Redis channel.
+auto publisher(std::shared_ptr<stream_descriptor> in, std::shared_ptr<connection> conn) -> awaitable<void>
+{
+   for (std::string msg;;) {
+      auto n = co_await async_read_until(*in, dynamic_buffer(msg, 1024), "\n");
+      request req;
+      req.push("PUBLISH", "channel", msg);
+      co_await conn->async_exec(req, ignore, deferred);
+      msg.erase(0, n);
+   }
+}
+
+// Called from the main function (see main.cpp)
+auto co_main(config cfg) -> awaitable<void>
+{
+   auto ex = co_await asio::this_coro::executor;
+   auto conn = std::make_shared<connection>(ex);
+   auto stream = std::make_shared<stream_descriptor>(ex, ::dup(STDIN_FILENO));
+
+   co_spawn(ex, receiver(conn), detached);
+   co_spawn(ex, publisher(stream, conn), detached);
+   conn->async_run(cfg, {}, consign(detached, conn));
+
+   signal_set sig_set{ex, SIGINT, SIGTERM};
+   co_await sig_set.async_wait();
+   conn->cancel();
+   stream->cancel();
+}
+
+#else // defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)
+auto co_main(config const&) -> awaitable<void>
+{
+   std::cout << "Requires support for posix streams." << std::endl;
+   co_return;
+}
+#endif // defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/cpp20_containers.cpp

@@ -0,0 +1,106 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/asio/deferred.hpp>
+#include <boost/asio/detached.hpp>
+#include <boost/asio/co_spawn.hpp>
+#include <map>
+#include <vector>
+#include <iostream>
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+namespace asio = boost::asio;
+using boost::redis::request;
+using boost::redis::response;
+using boost::redis::ignore_t;
+using boost::redis::ignore;
+using boost::redis::config;
+using boost::redis::connection;
+using boost::asio::awaitable;
+using boost::asio::deferred;
+using boost::asio::detached;
+using boost::asio::consign;
+
+void print(std::map<std::string, std::string> const& cont)
+{
+   for (auto const& e: cont)
+      std::cout << e.first << ": " << e.second << "\n";
+}
+
+void print(std::vector<int> const& cont)
+{
+   for (auto const& e: cont) std::cout << e << " ";
+   std::cout << "\n";
+}
+
+// Stores the content of some STL containers in Redis.
+auto store(std::shared_ptr<connection> conn) -> awaitable<void>
+{
+   std::vector<int> vec
+      {1, 2, 3, 4, 5, 6};
+
+   std::map<std::string, std::string> map
+      {{"key1", "value1"}, {"key2", "value2"}, {"key3", "value3"}};
+
+   request req;
+   req.push_range("RPUSH", "rpush-key", vec);
+   req.push_range("HSET", "hset-key", map);
+
+   co_await conn->async_exec(req, ignore, deferred);
+}
+
+auto hgetall(std::shared_ptr<connection> conn) -> awaitable<void>
+{
+   // A request contains multiple commands.
+   request req;
+   req.push("HGETALL", "hset-key");
+
+   // Responses as tuple elements.
+   response<std::map<std::string, std::string>> resp;
+
+   // Executes the request and reads the response.
+   co_await conn->async_exec(req, resp, deferred);
+
+   print(std::get<0>(resp).value());
+}
+
+// Retrieves in a transaction.
+auto transaction(std::shared_ptr<connection> conn) -> awaitable<void>
+{
+   request req;
+   req.push("MULTI");
+   req.push("LRANGE", "rpush-key", 0, -1); // Retrieves
+   req.push("HGETALL", "hset-key"); // Retrieves
+   req.push("EXEC");
+
+   response<
+      ignore_t, // multi
+      ignore_t, // lrange
+      ignore_t, // hgetall
+      response<std::optional<std::vector<int>>, std::optional<std::map<std::string, std::string>>> // exec
+   > resp;
+
+   co_await conn->async_exec(req, resp, deferred);
+
+   print(std::get<0>(std::get<3>(resp).value()).value().value());
+   print(std::get<1>(std::get<3>(resp).value()).value().value());
+}
+
+// Called from the main function (see main.cpp)
+awaitable<void> co_main(config cfg)
+{
+   auto conn = std::make_shared<connection>(co_await asio::this_coro::executor);
+   conn->async_run(cfg, {}, consign(detached, conn));
+
+   co_await store(conn);
+   co_await transaction(conn);
+   co_await hgetall(conn);
+   conn->cancel();
+}
+
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/cpp20_echo_server.cpp

@@ -0,0 +1,70 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/asio/deferred.hpp>
+#include <boost/asio/signal_set.hpp>
+#include <boost/asio/detached.hpp>
+#include <boost/asio/redirect_error.hpp>
+#include <boost/asio/co_spawn.hpp>
+#include <iostream>
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+namespace asio = boost::asio;
+using tcp_socket = asio::deferred_t::as_default_on_t<asio::ip::tcp::socket>;
+using tcp_acceptor = asio::deferred_t::as_default_on_t<asio::ip::tcp::acceptor>;
+using signal_set = asio::deferred_t::as_default_on_t<asio::signal_set>;
+using boost::redis::request;
+using boost::redis::response;
+using boost::redis::config;
+using boost::system::error_code;
+using boost::redis::connection;
+using namespace std::chrono_literals;
+
+auto echo_server_session(tcp_socket socket, std::shared_ptr<connection> conn) -> asio::awaitable<void>
+{
+   request req;
+   response<std::string> resp;
+
+   for (std::string buffer;;) {
+      auto n = co_await asio::async_read_until(socket, asio::dynamic_buffer(buffer, 1024), "\n");
+      req.push("PING", buffer);
+      co_await conn->async_exec(req, resp, asio::deferred);
+      co_await asio::async_write(socket, asio::buffer(std::get<0>(resp).value()));
+      std::get<0>(resp).value().clear();
+      req.clear();
+      buffer.erase(0, n);
+   }
+}
+
+// Listens for tcp connections.
+auto listener(std::shared_ptr<connection> conn) -> asio::awaitable<void>
+{
+   try {
+      auto ex = co_await asio::this_coro::executor;
+      tcp_acceptor acc(ex, {asio::ip::tcp::v4(), 55555});
+      for (;;)
+         asio::co_spawn(ex, echo_server_session(co_await acc.async_accept(), conn), asio::detached);
+   } catch (std::exception const& e) {
+      std::clog << "Listener: " << e.what() << std::endl;
+   }
+}
+
+// Called from the main function (see main.cpp)
+auto co_main(config cfg) -> asio::awaitable<void>
+{
+   auto ex = co_await asio::this_coro::executor;
+   auto conn = std::make_shared<connection>(ex);
+   asio::co_spawn(ex, listener(conn), asio::detached);
+   conn->async_run(cfg, {}, asio::consign(asio::detached, conn));
+
+   signal_set sig_set(ex, SIGINT, SIGTERM);
+   co_await sig_set.async_wait();
+   conn->cancel();
+}
+
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/cpp20_intro.cpp

@@ -0,0 +1,42 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/asio/deferred.hpp>
+#include <boost/asio/co_spawn.hpp>
+#include <boost/asio/detached.hpp>
+#include <boost/asio/consign.hpp>
+#include <iostream>
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+namespace asio = boost::asio;
+using boost::redis::request;
+using boost::redis::response;
+using boost::redis::config;
+using boost::redis::connection;
+
+// Called from the main function (see main.cpp)
+auto co_main(config cfg) -> asio::awaitable<void>
+{
+   auto conn = std::make_shared<connection>(co_await asio::this_coro::executor);
+   conn->async_run(cfg, {}, asio::consign(asio::detached, conn));
+
+   // A request containing only a ping command.
+   request req;
+   req.push("PING", "Hello world");
+
+   // Response where the PONG response will be stored.
+   response<std::string> resp;
+
+   // Executes the request.
+   co_await conn->async_exec(req, resp, asio::deferred);
+   conn->cancel();
+
+   std::cout << "PING: " << std::get<0>(resp).value() << std::endl;
+}
+
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/cpp20_intro_tls.cpp

@@ -0,0 +1,54 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/asio/deferred.hpp>
+#include <boost/asio/use_awaitable.hpp>
+#include <boost/asio/detached.hpp>
+#include <boost/asio/consign.hpp>
+#include <iostream>
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+namespace asio = boost::asio;
+using boost::redis::request;
+using boost::redis::response;
+using boost::redis::config;
+using boost::redis::logger;
+using boost::redis::connection;
+
+auto verify_certificate(bool, asio::ssl::verify_context&) -> bool
+{
+   std::cout << "set_verify_callback" << std::endl;
+   return true;
+}
+
+auto co_main(config cfg) -> asio::awaitable<void>
+{
+   cfg.use_ssl = true;
+   cfg.username = "aedis";
+   cfg.password = "aedis";
+   cfg.addr.host = "db.occase.de";
+   cfg.addr.port = "6380";
+
+   auto conn = std::make_shared<connection>(co_await asio::this_coro::executor);
+   conn->async_run(cfg, {}, asio::consign(asio::detached, conn));
+
+   request req;
+   req.push("PING");
+
+   response<std::string> resp;
+
+   conn->next_layer().set_verify_mode(asio::ssl::verify_peer);
+   conn->next_layer().set_verify_callback(verify_certificate);
+
+   co_await conn->async_exec(req, resp, asio::deferred);
+   conn->cancel();
+
+   std::cout << "Response: " << std::get<0>(resp).value() << std::endl;
+}
+
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/cpp20_json.cpp

@@ -0,0 +1,77 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/asio/deferred.hpp>
+#include <boost/asio/detached.hpp>
+#include <boost/describe.hpp>
+#include <boost/asio/consign.hpp>
+#include <boost/asio/use_awaitable.hpp>
+#include <string>
+#include <iostream>
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+#define BOOST_JSON_NO_LIB
+#define BOOST_CONTAINER_NO_LIB
+#include <boost/json/serialize.hpp>
+#include <boost/json/parse.hpp>
+#include <boost/json/value_from.hpp>
+#include <boost/redis/resp3/serialization.hpp>
+#include <boost/json/src.hpp>
+
+namespace asio = boost::asio;
+using namespace boost::describe;
+using boost::redis::request;
+using boost::redis::response;
+using boost::redis::ignore_t;
+using boost::redis::config;
+using boost::redis::connection;
+
+// Struct that will be stored in Redis using json serialization. 
+struct user {
+   std::string name;
+   std::string age;
+   std::string country;
+};
+
+// The type must be described for serialization to work.
+BOOST_DESCRIBE_STRUCT(user, (), (name, age, country))
+
+// Boost.Redis customization points (example/json.hpp)
+void boost_redis_to_bulk(std::string& to, user const& u)
+   { boost::redis::resp3::boost_redis_to_bulk(to, boost::json::serialize(boost::json::value_from(u))); }
+
+void boost_redis_from_bulk(user& u, std::string_view sv, boost::system::error_code&)
+   { u = boost::json::value_to<user>(boost::json::parse(sv)); }
+
+auto co_main(config cfg) -> asio::awaitable<void>
+{
+   auto ex = co_await asio::this_coro::executor;
+   auto conn = std::make_shared<connection>(ex);
+   conn->async_run(cfg, {}, asio::consign(asio::detached, conn));
+
+   // user object that will be stored in Redis in json format.
+   user const u{"Joao", "58", "Brazil"};
+
+   // Stores and retrieves in the same request.
+   request req;
+   req.push("SET", "json-key", u); // Stores in Redis.
+   req.push("GET", "json-key"); // Retrieves from Redis.
+
+   response<ignore_t, user> resp;
+
+   co_await conn->async_exec(req, resp, asio::deferred);
+   conn->cancel();
+
+   // Prints the first ping
+   std::cout
+      << "Name: " << std::get<1>(resp).value().name << "\n"
+      << "Age: " << std::get<1>(resp).value().age << "\n"
+      << "Country: " << std::get<1>(resp).value().country << "\n";
+}
+
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/cpp20_protobuf.cpp

@@ -0,0 +1,88 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/redis/resp3/serialization.hpp>
+#include <boost/asio/deferred.hpp>
+#include <boost/asio/co_spawn.hpp>
+#include <boost/asio/detached.hpp>
+#include <boost/asio/consign.hpp>
+#include <boost/system/errc.hpp>
+#include <iostream>
+
+// See the definition in person.proto. This header is automatically
+// generated by CMakeLists.txt.
+#include "person.pb.h"
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+namespace asio = boost::asio;
+using boost::redis::request;
+using boost::redis::response;
+using boost::redis::operation;
+using boost::redis::ignore_t;
+using boost::redis::config;
+using boost::redis::connection;
+
+// The protobuf type described in example/person.proto
+using tutorial::person;
+
+// Boost.Redis customization points (example/protobuf.hpp)
+namespace tutorial
+{
+
+// Below I am using a Boost.Redis to indicate a protobuf error, this
+// is ok for an example, users however might want to define their own
+// error codes.
+void boost_redis_to_bulk(std::string& to, person const& u)
+{
+   std::string tmp;
+   if (!u.SerializeToString(&tmp))
+      throw boost::system::system_error(boost::redis::error::invalid_data_type);
+
+   boost::redis::resp3::boost_redis_to_bulk(to, tmp);
+}
+
+void boost_redis_from_bulk(person& u, std::string_view sv, boost::system::error_code& ec)
+{
+   std::string const tmp {sv};
+   if (!u.ParseFromString(tmp))
+      ec = boost::redis::error::invalid_data_type;
+}
+
+} // tutorial
+
+using tutorial::boost_redis_to_bulk;
+using tutorial::boost_redis_from_bulk;
+
+asio::awaitable<void> co_main(config cfg)
+{
+   auto ex = co_await asio::this_coro::executor;
+   auto conn = std::make_shared<connection>(ex);
+   conn->async_run(cfg, {}, asio::consign(asio::detached, conn));
+
+   person p;
+   p.set_name("Louis");
+   p.set_id(3);
+   p.set_email("No email yet.");
+
+   request req;
+   req.push("SET", "protobuf-key", p);
+   req.push("GET", "protobuf-key");
+
+   response<ignore_t, person> resp;
+
+   // Sends the request and receives the response.
+   co_await conn->async_exec(req, resp, asio::deferred);
+   conn->cancel();
+
+   std::cout
+      << "Name: " << std::get<1>(resp).value().name() << "\n"
+      << "Age: " << std::get<1>(resp).value().id() << "\n"
+      << "Email: " << std::get<1>(resp).value().email() << "\n";
+}
+
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/cpp20_resolve_with_sentinel.cpp

@@ -0,0 +1,75 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/asio/use_awaitable.hpp>
+#include <boost/asio/redirect_error.hpp>
+#include <boost/asio/detached.hpp>
+#include <iostream>
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+namespace asio = boost::asio;
+using endpoints = asio::ip::tcp::resolver::results_type;
+using boost::redis::request;
+using boost::redis::response;
+using boost::redis::ignore_t;
+using boost::redis::config;
+using boost::redis::address;
+using boost::redis::connection;
+
+auto redir(boost::system::error_code& ec)
+   { return asio::redirect_error(asio::use_awaitable, ec); }
+
+// For more info see
+// - https://redis.io/docs/manual/sentinel.
+// - https://redis.io/docs/reference/sentinel-clients.
+auto resolve_master_address(std::vector<address> const& addresses) -> asio::awaitable<address>
+{
+   request req;
+   req.push("SENTINEL", "get-master-addr-by-name", "mymaster");
+   req.push("QUIT");
+
+   auto conn = std::make_shared<connection>(co_await asio::this_coro::executor);
+
+   response<std::optional<std::array<std::string, 2>>, ignore_t> resp;
+   for (auto addr : addresses) {
+      boost::system::error_code ec;
+      config cfg;
+      cfg.addr = addr;
+      // TODO: async_run and async_exec should be lauched in
+      // parallel here so we can wait for async_run completion
+      // before eventually calling it again.
+      conn->async_run(cfg, {}, asio::consign(asio::detached, conn));
+      co_await conn->async_exec(req, resp, redir(ec));
+      conn->cancel();
+      conn->reset_stream();
+      if (!ec && std::get<0>(resp))
+         co_return address{std::get<0>(resp).value().value().at(0), std::get<0>(resp).value().value().at(1)};
+   }
+
+   co_return address{};
+}
+
+auto co_main(config cfg) -> asio::awaitable<void>
+{
+   // A list of sentinel addresses from which only one is responsive.
+   // This simulates sentinels that are down.
+   std::vector<address> const addresses
+   { address{"foo", "26379"}
+   , address{"bar", "26379"}
+   , cfg.addr
+   };
+
+   auto const ep = co_await resolve_master_address(addresses);
+
+   std::clog
+      << "Host: " << ep.host << "\n"
+      << "Port: " << ep.port << "\n"
+      << std::flush;
+}
+
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/cpp20_streams.cpp

@@ -0,0 +1,98 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/asio/deferred.hpp>
+#include <boost/asio/co_spawn.hpp>
+#include <boost/asio/detached.hpp>
+#include <boost/asio/consign.hpp>
+#include <boost/asio/signal_set.hpp>
+#include <boost/asio/awaitable.hpp>
+#include <iostream>
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+#include <memory>
+#include <string>
+#include <thread>
+#include <vector>
+
+namespace net = boost::asio;
+using boost::redis::config;
+using boost::redis::generic_response;
+using boost::redis::operation;
+using boost::redis::request;
+using boost::redis::connection;
+using signal_set = net::deferred_t::as_default_on_t<net::signal_set>;
+
+auto stream_reader(std::shared_ptr<connection> conn) -> net::awaitable<void>
+{
+    std::string redisStreamKey_;
+    request req;
+    generic_response resp;
+
+    std::string stream_id{"$"};
+    std::string const field = "myfield";
+
+    for (;;) {
+        req.push("XREAD", "BLOCK", "0", "STREAMS", "test-topic", stream_id);
+        co_await conn->async_exec(req, resp, net::deferred);
+
+        //std::cout << "Response: ";
+        //for (auto i = 0UL; i < resp->size(); ++i) {
+        //    std::cout << resp->at(i).value << ", ";
+        //}
+        //std::cout << std::endl;
+
+        // The following approach was taken in order to be able to
+        // deal with the responses, as generated by redis in the case
+        // that there are multiple stream 'records' within a single
+        // generic_response.  The nesting and number of values in
+        // resp.value() are different, depending on the contents
+        // of the stream in redis.  Uncomment the above commented-out
+        // code for examples while running the XADD command.
+
+        std::size_t item_index = 0;
+        while (item_index < std::size(resp.value())) {
+           auto const& val = resp.value().at(item_index).value;
+
+           if (field.compare(val) == 0) {
+               // We've hit a myfield field.
+               // The streamId is located at item_index - 2
+               // The payload is located at item_index + 1
+               stream_id = resp.value().at(item_index - 2).value;
+               std::cout
+                  << "StreamId: " << stream_id << ", "
+                  << "MyField: " << resp.value().at(item_index + 1).value
+                  << std::endl;
+               ++item_index; // We can increase so we don't read this again
+           }
+
+           ++item_index;
+        }
+
+        req.clear();
+        resp.value().clear();
+    }
+}
+
+// Run this in another terminal:
+// redis-cli -r 100000 -i 0.0001 XADD "test-topic" "*" "myfield" "myfieldvalue1"
+auto co_main(config cfg) -> net::awaitable<void>
+{
+   auto ex = co_await net::this_coro::executor;
+   auto conn = std::make_shared<connection>(ex);
+   net::co_spawn(ex, stream_reader(conn), net::detached);
+
+   // Disable health checks.
+   cfg.health_check_interval = std::chrono::seconds::zero();
+   conn->async_run(cfg, {}, net::consign(net::detached, conn));
+
+   signal_set sig_set(ex, SIGINT, SIGTERM);
+   co_await sig_set.async_wait();
+   conn->cancel();
+}
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/cpp20_subscriber.cpp

@@ -0,0 +1,102 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/redis/logger.hpp>
+#include <boost/asio/awaitable.hpp>
+#include <boost/asio/use_awaitable.hpp>
+#include <boost/asio/deferred.hpp>
+#include <boost/asio/co_spawn.hpp>
+#include <boost/asio/detached.hpp>
+#include <boost/asio/consign.hpp>
+#include <boost/asio/redirect_error.hpp>
+#include <boost/asio/signal_set.hpp>
+#include <iostream>
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+namespace asio = boost::asio;
+using namespace std::chrono_literals;
+using boost::redis::request;
+using boost::redis::generic_response;
+using boost::redis::consume_one;
+using boost::redis::logger;
+using boost::redis::config;
+using boost::redis::ignore;
+using boost::redis::error;
+using boost::system::error_code;
+using boost::redis::connection;
+using signal_set = asio::deferred_t::as_default_on_t<asio::signal_set>;
+
+/* This example will subscribe and read pushes indefinitely.
+ *
+ * To test send messages with redis-cli
+ *
+ *    $ redis-cli -3
+ *    127.0.0.1:6379> PUBLISH channel some-message
+ *    (integer) 3
+ *    127.0.0.1:6379>
+ *
+ * To test reconnection try, for example, to close all clients currently
+ * connected to the Redis instance
+ *
+ * $ redis-cli
+ * > CLIENT kill TYPE pubsub
+ */
+
+// Receives server pushes.
+auto
+receiver(std::shared_ptr<connection> conn) -> asio::awaitable<void>
+{
+   request req;
+   req.push("SUBSCRIBE", "channel");
+
+   generic_response resp;
+   conn->set_receive_response(resp);
+
+   // Loop while reconnection is enabled
+   while (conn->will_reconnect()) {
+
+      // Reconnect to the channels.
+      co_await conn->async_exec(req, ignore, asio::deferred);
+
+      // Loop reading Redis pushs messages.
+      for (error_code ec;;) {
+         // First tries to read any buffered pushes.
+         conn->receive(ec);
+         if (ec == error::sync_receive_push_failed) {
+            ec = {};
+            co_await conn->async_receive(asio::redirect_error(asio::use_awaitable, ec));
+         }
+
+         if (ec)
+            break; // Connection lost, break so we can reconnect to channels.
+
+         std::cout
+            << resp.value().at(1).value
+            << " " << resp.value().at(2).value
+            << " " << resp.value().at(3).value
+            << std::endl;
+
+         consume_one(resp);
+      }
+   }
+}
+
+auto co_main(config cfg) -> asio::awaitable<void>
+{
+   auto ex = co_await asio::this_coro::executor;
+   auto conn = std::make_shared<connection>(ex);
+   asio::co_spawn(ex, receiver(conn), asio::detached);
+   conn->async_run(cfg, {}, asio::consign(asio::detached, conn));
+
+   signal_set sig_set(ex, SIGINT, SIGTERM);
+   co_await sig_set.async_wait();
+
+   conn->cancel();
+}
+
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/main.cpp

@@ -0,0 +1,53 @@
+/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/redis/config.hpp>
+#include <boost/asio/co_spawn.hpp>
+#include <boost/asio/use_awaitable.hpp>
+#include <boost/asio/io_context.hpp>
+#include <iostream>
+
+namespace asio = boost::asio;
+using boost::redis::config;
+using boost::redis::logger;
+
+#if defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+extern asio::awaitable<void> co_main(config);
+
+auto main(int argc, char * argv[]) -> int
+{
+   try {
+      config cfg;
+
+      if (argc == 3) {
+         cfg.addr.host = argv[1];
+         cfg.addr.port = argv[2];
+      }
+
+      asio::io_context ioc;
+      asio::co_spawn(ioc, co_main(cfg), [](std::exception_ptr p) {
+         if (p)
+            std::rethrow_exception(p);
+      });
+      ioc.run();
+
+   } catch (std::exception const& e) {
+      std::cerr << "(main) " << e.what() << std::endl;
+      return 1;
+   }
+}
+
+#else // defined(BOOST_ASIO_HAS_CO_AWAIT)
+
+auto main() -> int
+{
+   std::cout << "Requires coroutine support." << std::endl;
+   return 0;
+}
+
+#endif // defined(BOOST_ASIO_HAS_CO_AWAIT)

example/person.proto

@@ -0,0 +1,9 @@
+syntax = "proto2";
+
+package tutorial;
+
+message person {
+  optional string name = 1;
+  optional int32 id = 2;
+  optional string email = 3;
+}

example/sync_connection.hpp

@@ -0,0 +1,63 @@
+
+/* Copyright (c) 2018-2023 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#include <boost/redis/connection.hpp>
+#include <boost/redis/request.hpp>
+#include <boost/asio/deferred.hpp>
+#include <boost/asio/detached.hpp>
+#include <boost/asio/use_future.hpp>
+#include <thread>
+#include <chrono>
+
+using namespace std::chrono_literals;
+
+namespace boost::redis
+{
+
+class sync_connection {
+public:
+   sync_connection()
+   : ioc_{1}
+   , conn_{std::make_shared<connection>(ioc_)}
+   { }
+
+   ~sync_connection()
+   {
+      thread_.join();
+   }
+
+   void run(config cfg)
+   {
+      // Starts a thread that will can io_context::run on which the
+      // connection will run.
+      thread_ = std::thread{[this, cfg]() {
+         conn_->async_run(cfg, {}, asio::detached);
+         ioc_.run();
+      }};
+   }
+
+   void stop()
+   {
+      asio::dispatch(ioc_, [this]() { conn_->cancel(); });
+   }
+
+   template <class Response>
+   auto exec(request const& req, Response& resp)
+   {
+      asio::dispatch(
+         conn_->get_executor(),
+         asio::deferred([this, &req, &resp]() { return conn_->async_exec(req, resp, asio::deferred); }))
+         (asio::use_future).get();
+   }
+
+private:
+   asio::io_context ioc_{1};
+   std::shared_ptr<connection> conn_;
+   std::thread thread_;
+};
+
+}

examples/aggregates_high_level.cpp

@@ -1,132 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <map>
-#include <set>
-#include <vector>
-#include <iostream>
-
-#include <aedis/aedis.hpp>
-#include <aedis/src.hpp>
-
-#include "print.hpp"
-
-namespace net = boost::asio;
-using aedis::resp3::node;
-using aedis::adapter::adapt;
-using aedis::adapter::adapter_t;
-using aedis::redis::command;
-using aedis::generic::client;
-
-using client_type = client<net::ip::tcp::socket, command>;
-
-// Response types we use in this example.
-using T0 = std::vector<node<std::string>>;
-using T1 = std::set<std::string>;
-using T2 = std::map<std::string, std::string>;
-
-// Some containers we will store in Redis as example.
-std::vector<int> vec
-   {1, 2, 3, 4, 5, 6};
-
-std::set<std::string> set
-   {"one", "two", "three", "four"};
-
-std::map<std::string, std::string> map
-   { {"key1", "value1"}
-   , {"key2", "value2"}
-   , {"key3", "value3"}
-   };
-
-struct receiver {
-public:
-   receiver(client_type& db)
-   : adapter0_{adapt(resp0_)}
-   , adapter1_{adapt(resp1_)}
-   , adapter2_{adapt(resp2_)}
-   , db_{&db} {}
-
-   void on_resp3(command cmd, node<boost::string_view> const& nd, boost::system::error_code& ec)
-   {
-      switch (cmd) {
-         case command::lrange:   adapter0_(nd, ec); break;
-         case command::smembers: adapter1_(nd, ec); break;
-         case command::hgetall: adapter2_(nd, ec); break;
-         default:;
-      }
-   }
-
-   void on_read(command cmd, std::size_t n)
-   {
-      std::cout << "on_read: " << cmd << ", " << n << "\n";
-
-      switch (cmd) {
-         case command::hello:
-         {
-            db_->send_range(command::rpush, "rpush-key", vec);
-            db_->send_range(command::sadd, "sadd-key", set);
-            db_->send_range(command::hset, "hset-key", map);
-         } break;
-
-         case command::rpush:
-         db_->send(command::lrange, "rpush-key", 0, -1);
-         break;
-
-         case command::sadd:
-         db_->send(command::smembers, "sadd-key");
-         break;
-
-         case command::hset:
-         db_->send(command::hgetall, "hset-key");
-         db_->send(command::quit);
-         break;
-
-         case command::lrange:
-         print_and_clear_aggregate(resp0_);
-         break;
-
-         case command::smembers:
-         print_and_clear(resp1_);
-         break;
-
-         case command::hgetall:
-         print_and_clear(resp2_);
-         break;
-
-         default:;
-      }
-   }
-
-   void on_write(std::size_t n)
-   { 
-      std::cout << "on_write: " << n << std::endl;
-   }
-
-   void on_push(std::size_t n) { }
-
-private:
-   T0 resp0_;
-   T1 resp1_;
-   T2 resp2_;
-   adapter_t<T0> adapter0_;
-   adapter_t<T1> adapter1_;
-   adapter_t<T2> adapter2_;
-   client_type* db_;
-};
-
-int main()
-{
-   net::io_context ioc;
-   client_type db{ioc.get_executor()};
-
-   auto recv = std::make_shared<receiver>(db);
-   db.set_receiver(recv);
-
-   db.async_run("127.0.0.1", "6379",
-      [](auto ec){ std::cout << ec.message() << std::endl;});
-
-   ioc.run();
-}

examples/chat_room.cpp

@@ -1,124 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <vector>
-#include <iostream>
-
-#include <boost/asio/signal_set.hpp>
-
-#include <aedis/aedis.hpp>
-#include <aedis/src.hpp>
-
-#include "user_session.hpp"
-
-namespace net = boost::asio;
-using aedis::resp3::node;
-using aedis::adapter::adapt;
-using aedis::adapter::adapter_t;
-using aedis::redis::command;
-using aedis::generic::client;
-using aedis::user_session;
-using aedis::user_session_base;
-
-using client_type = client<net::ip::tcp::socket, command>;
-using response_type = std::vector<node<std::string>>;
-
-class receiver {
-public:
-   receiver(std::shared_ptr<client_type> db)
-   : adapter_{adapt(resp_)}
-   , db_{db}
-   {}
-
-   void on_resp3(command cmd, node<boost::string_view> const& nd, boost::system::error_code& ec)
-   {
-      adapter_(nd, ec);
-   }
-
-   void on_read(command cmd, std::size_t)
-   {
-      switch (cmd) {
-         case command::hello:
-         db_->send(command::subscribe, "channel");
-         break;
-
-         case command::incr:
-         std::cout << "Messages so far: " << resp_.front().value << std::endl;
-         break;
-
-         default:;
-      }
-
-      resp_.clear();
-   }
-
-   void on_write(std::size_t n)
-   { 
-      std::cout << "Number of bytes written: " << n << std::endl;
-   }
-
-   void on_push(std::size_t)
-   {
-      for (auto& session: sessions_)
-         session->deliver(resp_.at(3).value);
-
-      resp_.clear();
-   }
-
-   auto add(std::shared_ptr<user_session_base> session)
-      { sessions_.push_back(session); }
-
-private:
-   response_type resp_;
-   adapter_t<response_type> adapter_;
-   std::shared_ptr<client_type> db_;
-   std::vector<std::shared_ptr<user_session_base>> sessions_;
-};
-
-net::awaitable<void>
-listener(
-    std::shared_ptr<net::ip::tcp::acceptor> acc,
-    std::shared_ptr<client_type> db,
-    std::shared_ptr<receiver> recv)
-{
-   auto on_user_msg = [db](std::string const& msg)
-   {
-      db->send(command::publish, "channel", msg);
-      db->send(command::incr, "message-counter");
-   };
-
-   for (;;) {
-      auto socket = co_await acc->async_accept(net::use_awaitable);
-      auto session = std::make_shared<user_session>(std::move(socket));
-      session->start(on_user_msg);
-      recv->add(session);
-   }
-}
-
-int main()
-{
-   try {
-      net::io_context ioc{1};
-
-      auto db = std::make_shared<client_type>(ioc.get_executor());
-      auto recv = std::make_shared<receiver>(db);
-      db->set_receiver(recv);
-
-      db->async_run("127.0.0.1", "6379",
-          [](auto ec){ std::cout << ec.message() << std::endl;});
-
-      auto endpoint = net::ip::tcp::endpoint{net::ip::tcp::v4(), 55555};
-      auto acc = std::make_shared<net::ip::tcp::acceptor>(ioc.get_executor(), endpoint);
-      co_spawn(ioc, listener(acc, db, recv), net::detached);
-
-      net::signal_set signals(ioc.get_executor(), SIGINT, SIGTERM);
-      signals.async_wait([&] (auto, int) { ioc.stop(); });
-
-      ioc.run();
-   } catch (std::exception const& e) {
-      std::cerr << e.what() << std::endl;
-   }
-}

examples/custom_adapter.cpp

@@ -1,63 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <iostream>
-
-#include <boost/asio/use_awaitable.hpp>
-#include <boost/asio/detached.hpp>
-#include <boost/asio/co_spawn.hpp>
-
-#include <aedis/aedis.hpp>
-#include <aedis/src.hpp>
-
-namespace net = boost::asio;
-namespace resp3 = aedis::resp3;
-
-using aedis::resp3::node;
-using aedis::redis::command;
-using aedis::generic::make_serializer;
-using net::ip::tcp;
-using tcp_socket = net::use_awaitable_t<>::as_default_on_t<net::ip::tcp::socket>;
-
-net::awaitable<void> example()
-{
-   auto ex = co_await net::this_coro::executor;
-
-   tcp::resolver resv{ex};
-   auto const res = resv.resolve("127.0.0.1", "6379");
-   tcp_socket socket{ex};
-   co_await socket.async_connect(*std::begin(res));
-
-   std::string request, buffer;
-
-   auto sr = make_serializer(request);
-   sr.push(command::hello, 3);
-   sr.push(command::ping, "Some message.");
-   sr.push(command::quit);
-   co_await net::async_write(socket, net::buffer(request));
-
-   auto adapter = [](node<boost::string_view> const& nd, boost::system::error_code&)
-   {
-      std::cout << nd << std::endl;
-   };
-
-   auto dbuffer = net::dynamic_buffer(buffer);
-   co_await resp3::async_read(socket, dbuffer); // hello
-   co_await resp3::async_read(socket, dbuffer, adapter);
-   co_await resp3::async_read(socket, dbuffer); // quit
-}
-
-int main()
-{
-   try {
-      net::io_context ioc;
-      net::co_spawn(ioc, example(), net::detached);
-      ioc.run();
-   } catch (std::exception const& e) {
-      std::cerr << e.what() << std::endl;
-   }
-}
-

examples/echo_server.cpp

@@ -1,141 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <iostream>
-#include <queue>
-#include <vector>
-#include <string>
-
-#include <boost/asio/signal_set.hpp>
-
-#include <aedis/aedis.hpp>
-#include <aedis/src.hpp>
-
-#include "user_session.hpp"
-
-namespace net = boost::asio;
-using aedis::resp3::node;
-using aedis::adapter::adapt;
-using aedis::adapter::adapter_t;
-using aedis::redis::command;
-using aedis::generic::client;
-using aedis::user_session;
-using aedis::user_session_base;
-using client_type = client<net::ip::tcp::socket, command>;
-using response_type = std::vector<node<std::string>>;
-
-class receiver {
-public:
-   receiver(std::shared_ptr<client_type> db)
-   : adapter_{adapt(resp_)}
-   , db_{db}
-   {}
-
-   void on_resp3(command cmd, node<boost::string_view> const& nd, boost::system::error_code& ec)
-   {
-      adapter_(nd, ec);
-   }
-
-   void on_read(command cmd, std::size_t n)
-   {
-      std::cout << "on_read: " << cmd << " " << n << std::endl;
-
-      switch (cmd) {
-         case command::ping:
-         if (resp_.front().value != "PONG") {
-            sessions_.front()->deliver(resp_.front().value);
-            sessions_.pop();
-         }
-         break;
-
-         case command::incr:
-         std::cout << "Echos so far: " << resp_.front().value << std::endl;
-         break;
-
-         default: /* Ignore */;
-      }
-
-      resp_.clear();
-   }
-
-   void on_write(std::size_t n)
-   { 
-      std::cout << "Number of bytes written: " << n << std::endl;
-   }
-
-   void on_push(std::size_t n) { }
-
-   void add_user_session(std::shared_ptr<user_session_base> session)
-      { sessions_.push(session); }
-
-private:
-   response_type resp_;
-   adapter_t<response_type> adapter_;
-   std::shared_ptr<client_type> db_;
-   std::queue<std::shared_ptr<user_session_base>> sessions_;
-};
-
-net::awaitable<void>
-run_with_reconnect(std::shared_ptr<client_type> db)
-{
-   auto ex = co_await net::this_coro::executor;
-
-   boost::asio::steady_timer timer{ex};
-
-   for (boost::system::error_code ec;;) {
-      co_await db->async_run("127.0.0.1", "6379",
-            net::redirect_error(net::use_awaitable, ec));
-
-      timer.expires_after(std::chrono::seconds{2});
-      co_await timer.async_wait(net::redirect_error(net::use_awaitable, ec));
-   }
-}
-
-net::awaitable<void>
-listener(
-    std::shared_ptr<net::ip::tcp::acceptor> acc,
-    std::shared_ptr<client_type> db,
-    std::shared_ptr<receiver> recv)
-{
-   for (;;) {
-      auto socket = co_await acc->async_accept(net::use_awaitable);
-      auto session = std::make_shared<user_session>(std::move(socket));
-
-      auto on_user_msg = [db, recv, session](std::string const& msg)
-      {
-         if (!msg.empty()) {
-            db->send(command::ping, msg);
-            db->send(command::incr, "echo-counter");
-            recv->add_user_session(session);
-         }
-      };
-
-      session->start(on_user_msg);
-   }
-}
-
-int main()
-{
-   try {
-      net::io_context ioc;
-
-      auto db = std::make_shared<client_type>(ioc.get_executor());
-      auto recv = std::make_shared<receiver>(db);
-      db->set_receiver(recv);
-      co_spawn(ioc, run_with_reconnect(db), net::detached);
-
-      auto endpoint = net::ip::tcp::endpoint{net::ip::tcp::v4(), 55555};
-      auto acc = std::make_shared<net::ip::tcp::acceptor>(ioc.get_executor(), endpoint);
-      co_spawn(ioc, listener(acc, db, recv), net::detached);
-
-      net::signal_set signals(ioc.get_executor(), SIGINT, SIGTERM);
-      signals.async_wait([&] (auto, int) { ioc.stop(); });
-
-      ioc.run();
-   } catch (std::exception const& e) {
-      std::cerr << e.what() << std::endl;
-   }
-}

examples/intro_high_level.cpp

@@ -1,76 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <string>
-#include <iostream>
-
-#include <aedis/aedis.hpp>
-#include <aedis/src.hpp>
-
-namespace net = boost::asio;
-using aedis::resp3::node;
-using aedis::adapter::adapter_t;
-using aedis::adapter::adapt;
-using aedis::redis::command;
-using aedis::generic::client;
-
-using client_type = client<net::ip::tcp::socket, command>;
-using response_type = node<std::string>;
-
-struct receiver {
-public:
-   receiver(client_type& db)
-   : adapter_{adapt(resp_)}
-   , db_{&db} {}
-
-   void on_resp3(command cmd, node<boost::string_view> const& nd, boost::system::error_code& ec)
-   {
-      adapter_(nd, ec);
-   }
-
-   void on_read(command cmd, std::size_t)
-   {
-      switch (cmd) {
-         case command::hello:
-         db_->send(command::ping, "O rato roeu a roupa do rei de Roma");
-         db_->send(command::incr, "intro-counter");
-         db_->send(command::set, "intro-key", "Três pratos de trigo para três tigres");
-         db_->send(command::get, "intro-key");
-         db_->send(command::quit);
-         break;
-
-         default:
-         std::cout << resp_.value << std::endl;
-      }
-   }
-
-   void on_write(std::size_t n)
-   { 
-      std::cout << "Number of bytes written: " << n << std::endl;
-   }
-
-   void on_push(std::size_t n) { }
-
-private:
-   response_type resp_;
-   adapter_t<response_type> adapter_;
-   client_type* db_;
-};
-
-int main()
-{
-   net::io_context ioc;
-
-   client_type db(ioc.get_executor());
-   auto recv = std::make_shared<receiver>(db);
-   db.set_receiver(recv);
-
-   db.async_run("127.0.0.1", "6379",
-      [](auto ec){ std::cout << ec.message() << std::endl;});
-
-   ioc.run();
-}
-

examples/intro_sync.cpp

@@ -1,57 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <string>
-#include <iostream>
-
-#include <boost/asio/connect.hpp>
-
-#include <aedis/aedis.hpp>
-#include <aedis/src.hpp>
-
-namespace net = boost::asio;
-namespace resp3 = aedis::resp3;
-
-using aedis::redis::command;
-using aedis::generic::make_serializer;
-using aedis::adapter::adapt;
-using net::dynamic_buffer;
-using net::ip::tcp;
-
-int main()
-{
-   try {
-      net::io_context ioc;
-      tcp::resolver resv{ioc};
-      auto const res = resv.resolve("127.0.0.1", "6379");
-      tcp::socket socket{ioc};
-      net::connect(socket, res);
-
-      // Creates the request and writes to the socket.
-      std::string buffer;
-      auto sr = make_serializer(buffer);
-      sr.push(command::hello, 3);
-      sr.push(command::ping);
-      sr.push(command::quit);
-      net::write(socket, net::buffer(buffer));
-      buffer.clear();
-
-      // Responses
-      std::string resp;
-
-      // Reads the responses to all commands in the request.
-      auto dbuffer = dynamic_buffer(buffer);
-      resp3::read(socket, dbuffer);
-      resp3::read(socket, dbuffer, adapt(resp));
-      resp3::read(socket, dbuffer);
-
-      std::cout << "Ping: " << resp << std::endl;
-
-   } catch (std::exception const& e) {
-      std::cerr << e.what() << std::endl;
-      exit(EXIT_FAILURE);
-   }
-}

examples/mystruct.hpp

@@ -1,53 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <string>
-#include <iterator>
-#include <cstdint>
-#include <iostream>
-#include <algorithm>
-
-#include <aedis/aedis.hpp>
-
-// Arbitrary struct to de/serialize.
-struct mystruct {
-   std::int32_t x;
-   std::string y;
-};
-
-// Serializes mystruct
-void to_bulk(std::string& to, mystruct const& obj)
-{
-   using aedis::resp3::type;
-   using aedis::resp3::add_header;
-   using aedis::resp3::add_separator;
-
-   auto const size = sizeof obj.x + obj.y.size();
-   add_header(to, type::blob_string, size);
-   auto const* p = reinterpret_cast<char const*>(&obj.x);
-   std::copy(p, p + sizeof obj.x, std::back_inserter(to));
-   std::copy(std::cbegin(obj.y), std::cend(obj.y), std::back_inserter(to));
-   add_separator(to);
-}
-
-// Deserialize the struct.
-void from_string(mystruct& obj, boost::string_view sv, boost::system::error_code& ec)
-{
-   char* p = reinterpret_cast<char*>(&obj.x);
-   std::copy(std::cbegin(sv), std::cbegin(sv) + sizeof obj.x, p);
-   std::copy(std::cbegin(sv) + sizeof obj.x, std::cend(sv), std::back_inserter(obj.y));
-}
-
-std::ostream& operator<<(std::ostream& os, mystruct const& obj)
-{
-   os << "x: " << obj.x << ", y: " << obj.y;
-   return os;
-}
-
-bool operator<(mystruct const& a, mystruct const& b)
-{
-   return std::tie(a.x, a.y) < std::tie(b.x, b.y);
-}

examples/print.hpp

@@ -1,47 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <map>
-#include <set>
-#include <vector>
-#include <string>
-#include <iostream>
-
-#include <aedis/resp3/type.hpp>
-#include <aedis/resp3/node.hpp>
-
-// Some functions to make the examples less repetitive.
-
-namespace net = boost::asio;
-using aedis::resp3::node;
-using aedis::adapter::adapt;
-using aedis::adapter::adapter_t;
-using aedis::redis::command;
-using aedis::generic::client;
-
-void print_and_clear_aggregate(std::vector<aedis::resp3::node<std::string>>& v)
-{
-   auto const m = aedis::resp3::element_multiplicity(v.front().data_type);
-   for (auto i = 0lu; i < m * v.front().aggregate_size; ++i)
-      std::cout << v[i + 1].value << " ";
-   std::cout << "\n";
-   v.clear();
-}
-
-void print_and_clear(std::set<std::string>& cont)
-{
-   for (auto const& e: cont) std::cout << e << " ";
-   std::cout << "\n";
-   cont.clear();
-}
-
-void print_and_clear(std::map<std::string, std::string>& cont)
-{
-   for (auto const& e: cont)
-      std::cout << e.first << ": " << e.second << "\n";
-   cont.clear();
-}
-

examples/serialization_sync.cpp

@@ -1,68 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <string>
-#include <iterator>
-#include <cstdint>
-#include <iostream>
-#include <algorithm>
-
-#include <boost/asio/connect.hpp>
-
-#include <aedis/aedis.hpp>
-#include <aedis/src.hpp>
-
-#include "mystruct.hpp"
-
-namespace net = boost::asio;
-namespace resp3 = aedis::resp3;
-
-using aedis::resp3::type;
-using aedis::redis::command;
-using aedis::generic::make_serializer;
-using aedis::adapter::adapt;
-using net::ip::tcp;
-
-int main()
-{
-   try {
-      net::io_context ioc;
-      tcp::resolver resv{ioc};
-      auto const res = resv.resolve("127.0.0.1", "6379");
-      tcp::socket socket{ioc};
-      net::connect(socket, res);
-
-      // This struct will be serialized and stored on Redis.
-      mystruct in{42, "Some string"};
-
-      // Creates and sends a request to redis.
-      std::string request;
-      auto sr = make_serializer(request);
-      sr.push(command::hello, 3);
-      sr.push(command::set, "key", in);
-      sr.push(command::get, "key");
-      sr.push(command::quit);
-      net::write(socket, net::buffer(request));
-
-      // Object to store the response.
-      mystruct out;
-
-      // Reads the responses to all commands in the request.
-      std::string buffer;
-      auto dbuf = net::dynamic_buffer(buffer);
-      resp3::read(socket, dbuf); // hello
-      resp3::read(socket, dbuf); // set
-      resp3::read(socket, dbuf, adapt(out)); // get
-      resp3::read(socket, dbuf); // quit
-
-      // Should be equal to what has been sent above.
-      std::cout << out << std::endl;
-
-   } catch (std::exception const& e) {
-      std::cerr << e.what() << std::endl;
-      exit(EXIT_FAILURE);
-   }
-}

examples/subscriber.cpp

@@ -1,65 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <iostream>
-
-#include <boost/asio/use_awaitable.hpp>
-#include <boost/asio/detached.hpp>
-#include <boost/asio/co_spawn.hpp>
-
-#include <aedis/aedis.hpp>
-#include <aedis/src.hpp>
-
-namespace net = boost::asio;
-namespace resp3 = aedis::resp3;
-
-using aedis::resp3::node;
-using aedis::redis::command;
-using aedis::adapter::adapt;
-using aedis::generic::make_serializer;
-using net::ip::tcp;
-using net::write;
-using net::buffer;
-using tcp_socket = net::use_awaitable_t<>::as_default_on_t<net::ip::tcp::socket>;
-
-net::awaitable<void> example()
-{
-   auto ex = co_await net::this_coro::executor;
-
-   tcp::resolver resv{ex};
-   auto const res = resv.resolve("127.0.0.1", "6379");
-   tcp_socket socket{ex};
-   co_await socket.async_connect(*std::begin(res));
-
-   std::string request;
-   auto sr = make_serializer(request);
-   sr.push(command::hello, 3);
-   sr.push(command::subscribe, "channel1", "channel2");
-   co_await net::async_write(socket, buffer(request));
-
-   // Ignores the response to hello.
-   std::string buffer;
-   co_await resp3::async_read(socket, net::dynamic_buffer(buffer));
-
-   for (std::vector<node<std::string>> resp;;) {
-      co_await resp3::async_read(socket, net::dynamic_buffer(buffer), adapt(resp));
-      for (auto const& e: resp)
-         std::cout << e << std::endl;
-      resp.clear();
-   }
-}
-
-int main()
-{
-   try {
-      net::io_context ioc;
-      net::co_spawn(ioc, example(), net::detached);
-      ioc.run();
-   } catch (std::exception const& e) {
-      std::cerr << e.what() << std::endl;
-   }
-}
-

examples/subscriber_high_level.cpp

@@ -1,93 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <iostream>
-
-#include <aedis/aedis.hpp>
-#include <aedis/src.hpp>
-
-namespace net = boost::asio;
-
-using aedis::resp3::node;
-using aedis::sentinel::command;
-using aedis::generic::client;
-using aedis::adapter::adapt;
-using client_type = client<net::ip::tcp::socket, command>;
-using response_type = std::vector<node<std::string>>;
-using adapter_type = aedis::adapter::adapter_t<response_type>;
-
-/* In this example we send a subscription to a channel and start
- * reading server side messages indefinitely.
- *
- * After starting the example you can test it by sending messages with
- * redis-cli like this
- *
- *    $ redis-cli -3
- *    127.0.0.1:6379> PUBLISH channel1 some-message
- *    (integer) 3
- *    127.0.0.1:6379>
- *
- * The messages will then appear on the terminal you are running the
- * example.
- */
-
-class receiver {
-public:
-   receiver(client_type& db)
-   : adapter_{adapt(resp_)}
-   , db_{&db} {}
-
-   void on_resp3(command cmd, node<boost::string_view> const& nd, boost::system::error_code& ec)
-   {
-      adapter_(nd, ec);
-   }
-
-   void on_read(command cmd, std::size_t)
-   {
-      switch (cmd) {
-         case command::hello:
-         db_->send(command::subscribe, "channel1", "channel2");
-         break;
-         default:;
-      }
-
-      resp_.clear();
-   }
-
-   void on_write(std::size_t n)
-   { 
-      std::cout << "Number of bytes written: " << n << std::endl;
-   }
-
-   void on_push(std::size_t)
-   {
-      std::cout
-         << "Event: " << resp_.at(1).value << "\n"
-         << "Channel: " << resp_.at(2).value << "\n"
-         << "Message: " << resp_.at(3).value << "\n"
-         << std::endl;
-
-      resp_.clear();
-   }
-
-private:
-   response_type resp_;
-   adapter_type adapter_;
-   client_type* db_;
-};
-
-int main()
-{
-   net::io_context ioc;
-   client_type db{ioc.get_executor()};
-   auto recv = std::make_shared<receiver>(db);
-   db.set_receiver(recv);
-
-   db.async_run("127.0.0.1", "6379",
-      [](auto ec){ std::cout << ec.message() << std::endl;});
-
-   ioc.run();
-}

examples/transaction.cpp

@@ -1,73 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#include <iostream>
-
-#include <boost/asio/use_awaitable.hpp>
-#include <boost/asio/detached.hpp>
-#include <boost/asio/co_spawn.hpp>
-
-#include <aedis/aedis.hpp>
-#include <aedis/src.hpp>
-
-namespace net = boost::asio;
-namespace resp3 = aedis::resp3;
-using aedis::redis::command;
-using aedis::adapter::adapt;
-using aedis::generic::make_serializer;
-using net::ip::tcp;
-using tcp_socket = net::use_awaitable_t<>::as_default_on_t<net::ip::tcp::socket>;
-
-net::awaitable<void> example()
-{
-   auto ex = co_await net::this_coro::executor;
-
-   tcp::resolver resv{ex};
-   auto const res = resv.resolve("127.0.0.1", "6379");
-   tcp_socket socket{ex};
-   co_await socket.async_connect(*std::begin(res));
-
-   std::string request;
-   auto sr = make_serializer(request);
-   sr.push(command::hello, 3);
-   sr.push(command::multi);
-   sr.push(command::ping, "Some message.");
-   sr.push(command::set, "low-level-key", "some content", "EX", "2");
-   sr.push(command::exec);
-   sr.push(command::quit);
-   co_await net::async_write(socket, net::buffer(request));
-
-   std::tuple<std::string, boost::optional<std::string>> response;
-
-   std::string buffer;
-   auto dbuffer = net::dynamic_buffer(buffer);
-   co_await resp3::async_read(socket, dbuffer); // hellp
-   co_await resp3::async_read(socket, dbuffer); // multi
-   co_await resp3::async_read(socket, dbuffer); // ping
-   co_await resp3::async_read(socket, dbuffer); // set
-   co_await resp3::async_read(socket, dbuffer, adapt(response));
-   co_await resp3::async_read(socket, dbuffer); // quit
-
-   std::cout
-      << "Ping: " << std::get<0>(response) << "\n"
-      << "Get (has_value): " << std::get<1>(response).has_value()
-      << std::endl;
-
-   if (std::get<1>(response).has_value())
-      std::cout << "Get (value): " << std::get<1>(response).value() << std::endl;
-}
-
-int main()
-{
-   try {
-      net::io_context ioc;
-      net::co_spawn(ioc, example(), net::detached);
-      ioc.run();
-   } catch (std::exception const& e) {
-      std::cerr << e.what() << std::endl;
-   }
-}
-

examples/user_session.hpp

@@ -1,98 +0,0 @@
-/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)
- *
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE.txt)
- */
-
-#ifndef AEDIS_USER_SESSION_HPP
-#define AEDIS_USER_SESSION_HPP
-
-#include <functional>
-
-#include <boost/asio/awaitable.hpp>
-#include <boost/asio/detached.hpp>
-#include <boost/asio/co_spawn.hpp>
-#include <boost/asio/redirect_error.hpp>
-
-// An example user session.
-
-namespace aedis
-{
-
-// Base class for user sessions.
-struct user_session_base {
-  virtual ~user_session_base() {}
-  virtual void deliver(std::string const& msg) = 0;
-};
-
-class user_session:
-   public user_session_base,
-   public std::enable_shared_from_this<user_session> {
-public:
-   user_session(boost::asio::ip::tcp::socket socket)
-   : socket_(std::move(socket))
-   , timer_(socket_.get_executor())
-      { timer_.expires_at(std::chrono::steady_clock::time_point::max()); }
-
-   void start(std::function<void(std::string const&)> on_msg)
-   {
-      co_spawn(socket_.get_executor(),
-          [self = shared_from_this(), on_msg]{ return self->reader(on_msg); },
-          boost::asio::detached);
-
-      co_spawn(socket_.get_executor(),
-          [self = shared_from_this()]{ return self->writer(); },
-          boost::asio::detached);
-   }
-
-   void deliver(std::string const& msg)
-   {
-      write_msgs_.push_back(msg);
-      timer_.cancel_one();
-   }
-
-private:
-   boost::asio::awaitable<void>
-   reader(std::function<void(std::string const&)> on_msg)
-   {
-      try {
-         for (std::string msg;;) {
-            auto const n = co_await boost::asio::async_read_until(socket_, boost::asio::dynamic_buffer(msg, 1024), "\n", boost::asio::use_awaitable);
-            on_msg(msg);
-            msg.erase(0, n);
-         }
-      } catch (std::exception&) {
-         stop();
-      }
-   }
-
-   boost::asio::awaitable<void> writer()
-   {
-      try {
-         while (socket_.is_open()) {
-            if (write_msgs_.empty()) {
-               boost::system::error_code ec;
-               co_await timer_.async_wait(boost::asio::redirect_error(boost::asio::use_awaitable, ec));
-            } else {
-               co_await boost::asio::async_write(socket_, boost::asio::buffer(write_msgs_.front()), boost::asio::use_awaitable);
-               write_msgs_.pop_front();
-            }
-         }
-      } catch (std::exception&) {
-        stop();
-      }
-   }
-
-   void stop()
-   {
-      socket_.close();
-      timer_.cancel();
-   }
-
-   boost::asio::ip::tcp::socket socket_;
-   boost::asio::steady_timer timer_;
-   std::deque<std::string> write_msgs_;
-};
-
-} // aedis
-#endif // AEDIS_USER_SESSION_HPP

include/boost/redis.hpp

@@ -0,0 +1,28 @@
+/* Copyright (c) 2018-2023 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#ifndef BOOST_REDIS_HPP
+#define BOOST_REDIS_HPP
+
+#include <boost/redis/config.hpp>
+#include <boost/redis/error.hpp>
+#include <boost/redis/connection.hpp>
+#include <boost/redis/request.hpp>
+#include <boost/redis/response.hpp>
+#include <boost/redis/ignore.hpp>
+#include <boost/redis/logger.hpp>
+
+/** @defgroup high-level-api Reference
+ *
+ *  This page contains the documentation of the Aedis high-level API.
+ */
+
+/** @defgroup low-level-api Reference
+ *
+ *  This page contains the documentation of the Aedis low-level API.
+ */
+
+#endif // BOOST_REDIS_HPP

include/boost/redis/adapter/adapt.hpp

@@ -0,0 +1,80 @@
+/* Copyright (c) 2018-2023 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#ifndef BOOST_REDIS_ADAPTER_ADAPT_HPP
+#define BOOST_REDIS_ADAPTER_ADAPT_HPP
+
+#include <boost/redis/resp3/node.hpp>
+#include <boost/redis/response.hpp>
+#include <boost/redis/adapter/detail/result_traits.hpp>
+#include <boost/redis/adapter/detail/response_traits.hpp>
+#include <boost/mp11.hpp>
+#include <boost/system.hpp>
+
+#include <tuple>
+#include <limits>
+#include <string_view>
+#include <variant>
+
+namespace boost::redis::adapter
+{
+
+/** @brief Adapts a type to be used as a response.
+ *
+ *  The type T must be either
+ *
+ *  1. a response<T1, T2, T3, ...> or
+ *  2. std::vector<node<String>>
+ *
+ *  The types T1, T2, etc can be any STL container, any integer type
+ *  and `std::string`.
+ *
+ *  @param t Tuple containing the responses.
+ */
+template<class T>
+auto boost_redis_adapt(T& t) noexcept
+{
+   return detail::response_traits<T>::adapt(t);
+}
+
+/** @brief Adapts user data to read operations.
+ *  @ingroup low-level-api
+ *
+ *  STL containers, \c resp3::response and built-in types are supported and
+ *  can be used in conjunction with \c std::optional<T>.
+ *
+ *  Example usage:
+ *
+ *  @code
+ *  std::unordered_map<std::string, std::string> cont;
+ *  co_await async_read(socket, buffer, adapt(cont));
+ *  @endcode
+ * 
+ *  For a transaction
+ *
+ *  @code
+ *  sr.push(command::multi);
+ *  sr.push(command::ping, ...);
+ *  sr.push(command::incr, ...);
+ *  sr.push_range(command::rpush, ...);
+ *  sr.push(command::lrange, ...);
+ *  sr.push(command::incr, ...);
+ *  sr.push(command::exec);
+ *
+ *  co_await async_write(socket, buffer(request));
+ *
+ *  // Reads the response to a transaction
+ *  resp3::response<std::string, int, int, std::vector<std::string>, int> execs;
+ *  co_await resp3::async_read(socket, dynamic_buffer(buffer), adapt(execs));
+ *  @endcode
+ */
+template<class T>
+auto adapt2(T& t = redis::ignore) noexcept
+   { return detail::result_traits<T>::adapt(t); }
+
+} // boost::redis::adapter
+
+#endif // BOOST_REDIS_ADAPTER_ADAPT_HPP

include/boost/redis/adapter/detail/adapters.hpp

@@ -0,0 +1,444 @@
+/* Copyright (c) 2018-2023 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#ifndef BOOST_REDIS_ADAPTER_ADAPTERS_HPP
+#define BOOST_REDIS_ADAPTER_ADAPTERS_HPP
+
+#include <boost/redis/error.hpp>
+#include <boost/redis/resp3/type.hpp>
+#include <boost/redis/resp3/serialization.hpp>
+#include <boost/redis/resp3/node.hpp>
+#include <boost/redis/adapter/result.hpp>
+#include <boost/assert.hpp>
+
+#include <set>
+#include <optional>
+#include <unordered_set>
+#include <forward_list>
+#include <system_error>
+#include <map>
+#include <unordered_map>
+#include <list>
+#include <deque>
+#include <vector>
+#include <array>
+#include <string_view>
+#include <charconv>
+
+// See https://stackoverflow.com/a/31658120/1077832
+#include<ciso646>
+#ifdef _LIBCPP_VERSION
+#else
+#include <cstdlib>
+#endif
+
+namespace boost::redis::adapter::detail
+{
+
+// Serialization.
+
+template <class T>
+auto boost_redis_from_bulk(T& i, std::string_view sv, system::error_code& ec) -> typename std::enable_if<std::is_integral<T>::value, void>::type
+{
+   auto const res = std::from_chars(sv.data(), sv.data() + std::size(sv), i);
+   if (res.ec != std::errc())
+      ec = redis::error::not_a_number;
+}
+
+inline
+void boost_redis_from_bulk(bool& t, std::string_view sv, system::error_code&)
+{
+   t = *sv.data() == 't';
+}
+
+inline
+void boost_redis_from_bulk(double& d, std::string_view sv, system::error_code& ec)
+{
+#ifdef _LIBCPP_VERSION
+   // The string in sv is not null terminated and we also don't know
+   // if there is enough space at the end for a null char. The easiest
+   // thing to do is to create a temporary.
+   std::string const tmp{sv.data(), sv.data() + std::size(sv)};
+   char* end{};
+   d = std::strtod(tmp.data(), &end);
+   if (d == HUGE_VAL || d == 0)
+      ec = redis::error::not_a_double;
+#else
+   auto const res = std::from_chars(sv.data(), sv.data() + std::size(sv), d);
+   if (res.ec != std::errc())
+      ec = redis::error::not_a_double;
+#endif // _LIBCPP_VERSION
+}
+
+template <class CharT, class Traits, class Allocator>
+void
+boost_redis_from_bulk(
+   std::basic_string<CharT, Traits, Allocator>& s,
+   std::string_view sv,
+   system::error_code&)
+{
+  s.append(sv.data(), sv.size());
+}
+
+//================================================
+
+template <class Result>
+class general_aggregate {
+private:
+   Result* result_;
+
+public:
+   explicit general_aggregate(Result* c = nullptr): result_(c) {}
+   template <class String>
+   void operator()(resp3::basic_node<String> const& nd, system::error_code&)
+   {
+      BOOST_ASSERT_MSG(!!result_, "Unexpected null pointer");
+      switch (nd.data_type) {
+         case resp3::type::blob_error:
+         case resp3::type::simple_error:
+            *result_ = error{nd.data_type, std::string{std::cbegin(nd.value), std::cend(nd.value)}};
+            break;
+         default:
+            result_->value().push_back({nd.data_type, nd.aggregate_size, nd.depth, std::string{std::cbegin(nd.value), std::cend(nd.value)}});
+      }
+   }
+};
+
+template <class Node>
+class general_simple {
+private:
+   Node* result_;
+
+public:
+   explicit general_simple(Node* t = nullptr) : result_(t) {}
+
+   template <class String>
+   void operator()(resp3::basic_node<String> const& nd, system::error_code&)
+   {
+      BOOST_ASSERT_MSG(!!result_, "Unexpected null pointer");
+      switch (nd.data_type) {
+         case resp3::type::blob_error:
+         case resp3::type::simple_error:
+            *result_ = error{nd.data_type, std::string{std::cbegin(nd.value), std::cend(nd.value)}};
+            break;
+         default:
+            result_->value().data_type = nd.data_type;
+            result_->value().aggregate_size = nd.aggregate_size;
+            result_->value().depth = nd.depth;
+            result_->value().value.assign(nd.value.data(), nd.value.size());
+      }
+   }
+};
+
+template <class Result>
+class simple_impl {
+public:
+   void on_value_available(Result&) {}
+
+   template <class String>
+   void operator()(Result& result, resp3::basic_node<String> const& n, system::error_code& ec)
+   {
+      if (is_aggregate(n.data_type)) {
+         ec = redis::error::expects_resp3_simple_type;
+         return;
+      }
+
+      boost_redis_from_bulk(result, n.value, ec);
+   }
+};
+
+template <class Result>
+class set_impl {
+private:
+   typename Result::iterator hint_;
+
+public:
+   void on_value_available(Result& result)
+      { hint_ = std::end(result); }
+
+   template <class String>
+   void operator()(Result& result, resp3::basic_node<String> const& nd, system::error_code& ec)
+   {
+      if (is_aggregate(nd.data_type)) {
+         if (nd.data_type != resp3::type::set)
+            ec = redis::error::expects_resp3_set;
+         return;
+      }
+
+      BOOST_ASSERT(nd.aggregate_size == 1);
+
+      if (nd.depth < 1) {
+	 ec = redis::error::expects_resp3_set;
+	 return;
+      }
+
+      typename Result::key_type obj;
+      boost_redis_from_bulk(obj, nd.value, ec);
+      hint_ = result.insert(hint_, std::move(obj));
+   }
+};
+
+template <class Result>
+class map_impl {
+private:
+   typename Result::iterator current_;
+   bool on_key_ = true;
+
+public:
+   void on_value_available(Result& result)
+      { current_ = std::end(result); }
+
+   template <class String>
+   void operator()(Result& result, resp3::basic_node<String> const& nd, system::error_code& ec)
+   {
+      if (is_aggregate(nd.data_type)) {
+         if (element_multiplicity(nd.data_type) != 2)
+           ec = redis::error::expects_resp3_map;
+         return;
+      }
+
+      BOOST_ASSERT(nd.aggregate_size == 1);
+
+      if (nd.depth < 1) {
+	 ec = redis::error::expects_resp3_map;
+	 return;
+      }
+
+      if (on_key_) {
+         typename Result::key_type obj;
+         boost_redis_from_bulk(obj, nd.value, ec);
+         current_ = result.insert(current_, {std::move(obj), {}});
+      } else {
+         typename Result::mapped_type obj;
+         boost_redis_from_bulk(obj, nd.value, ec);
+         current_->second = std::move(obj);
+      }
+
+      on_key_ = !on_key_;
+   }
+};
+
+template <class Result>
+class vector_impl {
+public:
+   void on_value_available(Result& ) { }
+
+   template <class String>
+   void operator()(Result& result, resp3::basic_node<String> const& nd, system::error_code& ec)
+   {
+      if (is_aggregate(nd.data_type)) {
+         auto const m = element_multiplicity(nd.data_type);
+         result.reserve(result.size() + m * nd.aggregate_size);
+      } else {
+         result.push_back({});
+         boost_redis_from_bulk(result.back(), nd.value, ec);
+      }
+   }
+};
+
+template <class Result>
+class array_impl {
+private:
+   int i_ = -1;
+
+public:
+   void on_value_available(Result& ) { }
+
+   template <class String>
+   void operator()(Result& result, resp3::basic_node<String> const& nd, system::error_code& ec)
+   {
+      if (is_aggregate(nd.data_type)) {
+	 if (i_ != -1) {
+            ec = redis::error::nested_aggregate_not_supported;
+            return;
+         }
+
+         if (result.size() != nd.aggregate_size * element_multiplicity(nd.data_type)) {
+            ec = redis::error::incompatible_size;
+            return;
+         }
+      } else {
+         if (i_ == -1) {
+            ec = redis::error::expects_resp3_aggregate;
+            return;
+         }
+
+         BOOST_ASSERT(nd.aggregate_size == 1);
+         boost_redis_from_bulk(result.at(i_), nd.value, ec);
+      }
+
+      ++i_;
+   }
+};
+
+template <class Result>
+struct list_impl {
+
+   void on_value_available(Result& ) { }
+
+   template <class String>
+   void operator()(Result& result, resp3::basic_node<String> const& nd, system::error_code& ec)
+   {
+      if (!is_aggregate(nd.data_type)) {
+        BOOST_ASSERT(nd.aggregate_size == 1);
+        if (nd.depth < 1) {
+           ec = redis::error::expects_resp3_aggregate;
+           return;
+        }
+
+        result.push_back({});
+        boost_redis_from_bulk(result.back(), nd.value, ec);
+      }
+   }
+};
+
+//---------------------------------------------------
+
+template <class T>
+struct impl_map { using type = simple_impl<T>; };
+
+template <class Key, class Compare, class Allocator>
+struct impl_map<std::set<Key, Compare, Allocator>> { using type = set_impl<std::set<Key, Compare, Allocator>>; };
+
+template <class Key, class Compare, class Allocator>
+struct impl_map<std::multiset<Key, Compare, Allocator>> { using type = set_impl<std::multiset<Key, Compare, Allocator>>; };
+
+template <class Key, class Hash, class KeyEqual, class Allocator>
+struct impl_map<std::unordered_set<Key, Hash, KeyEqual, Allocator>> { using type = set_impl<std::unordered_set<Key, Hash, KeyEqual, Allocator>>; };
+
+template <class Key, class Hash, class KeyEqual, class Allocator>
+struct impl_map<std::unordered_multiset<Key, Hash, KeyEqual, Allocator>> { using type = set_impl<std::unordered_multiset<Key, Hash, KeyEqual, Allocator>>; };
+
+template <class Key, class T, class Compare, class Allocator>
+struct impl_map<std::map<Key, T, Compare, Allocator>> { using type = map_impl<std::map<Key, T, Compare, Allocator>>; };
+
+template <class Key, class T, class Compare, class Allocator>
+struct impl_map<std::multimap<Key, T, Compare, Allocator>> { using type = map_impl<std::multimap<Key, T, Compare, Allocator>>; };
+
+template <class Key, class Hash, class KeyEqual, class Allocator>
+struct impl_map<std::unordered_map<Key, Hash, KeyEqual, Allocator>> { using type = map_impl<std::unordered_map<Key, Hash, KeyEqual, Allocator>>; };
+
+template <class Key, class Hash, class KeyEqual, class Allocator>
+struct impl_map<std::unordered_multimap<Key, Hash, KeyEqual, Allocator>> { using type = map_impl<std::unordered_multimap<Key, Hash, KeyEqual, Allocator>>; };
+
+template <class T, class Allocator>
+struct impl_map<std::vector<T, Allocator>> { using type = vector_impl<std::vector<T, Allocator>>; };
+
+template <class T, std::size_t N>
+struct impl_map<std::array<T, N>> { using type = array_impl<std::array<T, N>>; };
+
+template <class T, class Allocator>
+struct impl_map<std::list<T, Allocator>> { using type = list_impl<std::list<T, Allocator>>; };
+
+template <class T, class Allocator>
+struct impl_map<std::deque<T, Allocator>> { using type = list_impl<std::deque<T, Allocator>>; };
+
+//---------------------------------------------------
+
+template <class>
+class wrapper;
+
+template <class Result>
+class wrapper<result<Result>> {
+public:
+   using response_type = result<Result>;
+private:
+   response_type* result_;
+   typename impl_map<Result>::type impl_;
+
+   template <class String>
+   bool set_if_resp3_error(resp3::basic_node<String> const& nd) noexcept
+   {
+      switch (nd.data_type) {
+         case resp3::type::null:
+         case resp3::type::simple_error:
+         case resp3::type::blob_error:
+            *result_ = error{nd.data_type, {std::cbegin(nd.value), std::cend(nd.value)}};
+            return true;
+         default:
+            return false;
+      }
+   }
+
+public:
+   explicit wrapper(response_type* t = nullptr) : result_(t)
+   {
+      if (result_) {
+         result_->value() = Result{};
+         impl_.on_value_available(result_->value());
+      }
+   }
+
+   template <class String>
+   void operator()(resp3::basic_node<String> const& nd, system::error_code& ec)
+   {
+      BOOST_ASSERT_MSG(!!result_, "Unexpected null pointer");
+
+      if (result_->has_error())
+         return;
+
+      if (set_if_resp3_error(nd))
+         return;
+
+      BOOST_ASSERT(result_);
+      impl_(result_->value(), nd, ec);
+   }
+};
+
+template <class T>
+class wrapper<result<std::optional<T>>> {
+public:
+   using response_type = result<std::optional<T>>;
+
+private:
+   response_type* result_;
+   typename impl_map<T>::type impl_{};
+
+   template <class String>
+   bool set_if_resp3_error(resp3::basic_node<String> const& nd) noexcept
+   {
+      switch (nd.data_type) {
+         case resp3::type::blob_error:
+         case resp3::type::simple_error:
+            *result_ = error{nd.data_type, {std::cbegin(nd.value), std::cend(nd.value)}};
+            return true;
+         default:
+            return false;
+      }
+   }
+
+public:
+   explicit wrapper(response_type* o = nullptr) : result_(o) {}
+
+   template <class String>
+   void
+   operator()(
+      resp3::basic_node<String> const& nd,
+      system::error_code& ec)
+   {
+      BOOST_ASSERT_MSG(!!result_, "Unexpected null pointer");
+
+      if (result_->has_error())
+         return;
+
+      if (set_if_resp3_error(nd))
+         return;
+
+      if (nd.data_type == resp3::type::null)
+         return;
+
+      if (!result_->value().has_value()) {
+        result_->value() = T{};
+        impl_.on_value_available(result_->value().value());
+      }
+
+      impl_(result_->value().value(), nd, ec);
+   }
+};
+
+} // boost::redis::adapter::detail
+
+#endif // BOOST_REDIS_ADAPTER_ADAPTERS_HPP

include/boost/redis/adapter/detail/response_traits.hpp

@@ -0,0 +1,159 @@
+/* Copyright (c) 2018-2023 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#ifndef BOOST_REDIS_ADAPTER_DETAIL_RESPONSE_TRAITS_HPP
+#define BOOST_REDIS_ADAPTER_DETAIL_RESPONSE_TRAITS_HPP
+
+#include <boost/redis/resp3/node.hpp>
+#include <boost/redis/response.hpp>
+#include <boost/redis/adapter/detail/result_traits.hpp>
+#include <boost/mp11.hpp>
+#include <boost/system.hpp>
+
+#include <tuple>
+#include <limits>
+#include <string_view>
+#include <variant>
+
+namespace boost::redis::adapter::detail
+{
+
+class ignore_adapter {
+public:
+   template <class String>
+   void operator()(std::size_t, resp3::basic_node<String> const& nd, system::error_code& ec)
+   {
+      switch (nd.data_type) {
+         case resp3::type::simple_error: ec = redis::error::resp3_simple_error; break;
+         case resp3::type::blob_error: ec = redis::error::resp3_blob_error; break;
+         case resp3::type::null: ec = redis::error::resp3_null; break;
+         default:;
+      }
+   }
+
+   [[nodiscard]]
+   auto get_supported_response_size() const noexcept
+      { return static_cast<std::size_t>(-1);}
+};
+
+template <class Response>
+class static_adapter {
+private:
+   static constexpr auto size = std::tuple_size<Response>::value;
+   using adapter_tuple = mp11::mp_transform<adapter_t, Response>;
+   using variant_type = mp11::mp_rename<adapter_tuple, std::variant>;
+   using adapters_array_type = std::array<variant_type, size>;
+
+   adapters_array_type adapters_;
+
+public:
+   explicit static_adapter(Response& r)
+   {
+      assigner<size - 1>::assign(adapters_, r);
+   }
+
+   [[nodiscard]]
+   auto get_supported_response_size() const noexcept
+      { return size;}
+
+   template <class String>
+   void operator()(std::size_t i, resp3::basic_node<String> const& nd, system::error_code& ec)
+   {
+      using std::visit;
+      // I am usure whether this should be an error or an assertion.
+      BOOST_ASSERT(i < adapters_.size());
+      visit([&](auto& arg){arg(nd, ec);}, adapters_.at(i));
+   }
+};
+
+template <class Vector>
+class vector_adapter {
+private:
+   using adapter_type = typename result_traits<Vector>::adapter_type;
+   adapter_type adapter_;
+
+public:
+   explicit vector_adapter(Vector& v)
+   : adapter_{internal_adapt(v)}
+   { }
+
+   [[nodiscard]]
+   auto
+   get_supported_response_size() const noexcept
+      { return static_cast<std::size_t>(-1);}
+
+   template <class String>
+   void operator()(std::size_t, resp3::basic_node<String> const& nd, system::error_code& ec)
+   {
+      adapter_(nd, ec);
+   }
+};
+
+template <class>
+struct response_traits;
+
+template <>
+struct response_traits<ignore_t> {
+   using response_type = ignore_t;
+   using adapter_type = detail::ignore_adapter;
+
+   static auto adapt(response_type&) noexcept
+      { return detail::ignore_adapter{}; }
+};
+
+template <>
+struct response_traits<result<ignore_t>> {
+   using response_type = result<ignore_t>;
+   using adapter_type = detail::ignore_adapter;
+
+   static auto adapt(response_type&) noexcept
+      { return detail::ignore_adapter{}; }
+};
+
+template <class String, class Allocator>
+struct response_traits<result<std::vector<resp3::basic_node<String>, Allocator>>> {
+   using response_type = result<std::vector<resp3::basic_node<String>, Allocator>>;
+   using adapter_type = vector_adapter<response_type>;
+
+   static auto adapt(response_type& v) noexcept
+      { return adapter_type{v}; }
+};
+
+template <class ...Ts>
+struct response_traits<response<Ts...>> {
+   using response_type = response<Ts...>;
+   using adapter_type = static_adapter<response_type>;
+
+   static auto adapt(response_type& r) noexcept
+      { return adapter_type{r}; }
+};
+
+template <class Adapter>
+class wrapper {
+public:
+   explicit wrapper(Adapter adapter) : adapter_{adapter} {}
+
+   template <class String>
+   void operator()(resp3::basic_node<String> const& nd, system::error_code& ec)
+      { return adapter_(0, nd, ec); }
+
+   [[nodiscard]]
+   auto get_supported_response_size() const noexcept
+      { return adapter_.get_supported_response_size();}
+
+private:
+   Adapter adapter_;
+};
+
+template <class Adapter>
+auto make_adapter_wrapper(Adapter adapter)
+{
+   return wrapper{adapter};
+}
+
+} // boost::redis::adapter::detail
+
+#endif // BOOST_REDIS_ADAPTER_DETAIL_RESPONSE_TRAITS_HPP

include/boost/redis/adapter/detail/result_traits.hpp

@@ -0,0 +1,163 @@
+/* Copyright (c) 2018-2023 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#ifndef BOOST_REDIS_ADAPTER_RESPONSE_TRAITS_HPP
+#define BOOST_REDIS_ADAPTER_RESPONSE_TRAITS_HPP
+
+#include <boost/redis/error.hpp>
+#include <boost/redis/resp3/type.hpp>
+#include <boost/redis/ignore.hpp>
+#include <boost/redis/adapter/detail/adapters.hpp>
+#include <boost/redis/adapter/result.hpp>
+#include <boost/redis/adapter/ignore.hpp>
+#include <boost/mp11.hpp>
+
+#include <vector>
+#include <tuple>
+#include <string_view>
+#include <variant>
+
+namespace boost::redis::adapter::detail
+{
+
+/* Traits class for response objects.
+ *
+ * Provides traits for all supported response types i.e. all STL
+ * containers and C++ buil-in types.
+ */
+template <class Result>
+struct result_traits {
+   using adapter_type = adapter::detail::wrapper<typename std::decay<Result>::type>;
+   static auto adapt(Result& r) noexcept { return adapter_type{&r}; }
+};
+
+template <>
+struct result_traits<result<ignore_t>> {
+   using response_type = result<ignore_t>;
+   using adapter_type = ignore;
+   static auto adapt(response_type) noexcept { return adapter_type{}; }
+};
+
+template <>
+struct result_traits<ignore_t> {
+   using response_type = ignore_t;
+   using adapter_type = ignore;
+   static auto adapt(response_type) noexcept { return adapter_type{}; }
+};
+
+template <class T>
+struct result_traits<result<resp3::basic_node<T>>> {
+   using response_type = result<resp3::basic_node<T>>;
+   using adapter_type = adapter::detail::general_simple<response_type>;
+   static auto adapt(response_type& v) noexcept { return adapter_type{&v}; }
+};
+
+template <class String, class Allocator>
+struct result_traits<result<std::vector<resp3::basic_node<String>, Allocator>>> {
+   using response_type = result<std::vector<resp3::basic_node<String>, Allocator>>;
+   using adapter_type = adapter::detail::general_aggregate<response_type>;
+   static auto adapt(response_type& v) noexcept { return adapter_type{&v}; }
+};
+
+template <class T>
+using adapter_t = typename result_traits<std::decay_t<T>>::adapter_type;
+
+template<class T>
+auto internal_adapt(T& t) noexcept
+   { return result_traits<std::decay_t<T>>::adapt(t); }
+
+template <std::size_t N>
+struct assigner {
+  template <class T1, class T2>
+  static void assign(T1& dest, T2& from)
+  {
+     dest[N].template emplace<N>(internal_adapt(std::get<N>(from)));
+     assigner<N - 1>::assign(dest, from);
+  }
+};
+
+template <>
+struct assigner<0> {
+  template <class T1, class T2>
+  static void assign(T1& dest, T2& from)
+  {
+     dest[0].template emplace<0>(internal_adapt(std::get<0>(from)));
+  }
+};
+
+template <class Tuple>
+class static_aggregate_adapter;
+
+template <class Tuple>
+class static_aggregate_adapter<result<Tuple>> {
+private:
+   using adapters_array_type = 
+      std::array<
+         mp11::mp_rename<
+            mp11::mp_transform<
+               adapter_t, Tuple>,
+               std::variant>,
+         std::tuple_size<Tuple>::value>;
+
+   std::size_t i_ = 0;
+   std::size_t aggregate_size_ = 0;
+   adapters_array_type adapters_;
+   result<Tuple>* res_ = nullptr;
+
+public:
+   explicit static_aggregate_adapter(result<Tuple>* r = nullptr)
+   {
+      if (r) {
+         res_ = r;
+         detail::assigner<std::tuple_size<Tuple>::value - 1>::assign(adapters_, r->value());
+      }
+   }
+
+   template <class String>
+   void count(resp3::basic_node<String> const& nd)
+   {
+      if (nd.depth == 1) {
+         if (is_aggregate(nd.data_type))
+            aggregate_size_ = element_multiplicity(nd.data_type) * nd.aggregate_size;
+         else
+            ++i_;
+
+         return;
+      }
+
+      if (--aggregate_size_ == 0)
+         ++i_;
+   }
+
+   template <class String>
+   void operator()(resp3::basic_node<String> const& nd, system::error_code& ec)
+   {
+      using std::visit;
+
+      if (nd.depth == 0) {
+         auto const real_aggr_size = nd.aggregate_size * element_multiplicity(nd.data_type);
+         if (real_aggr_size != std::tuple_size<Tuple>::value)
+            ec = redis::error::incompatible_size;
+
+         return;
+      }
+
+      visit([&](auto& arg){arg(nd, ec);}, adapters_[i_]);
+      count(nd);
+   }
+};
+
+template <class... Ts>
+struct result_traits<result<std::tuple<Ts...>>>
+{
+   using response_type = result<std::tuple<Ts...>>;
+   using adapter_type = static_aggregate_adapter<response_type>;
+   static auto adapt(response_type& r) noexcept { return adapter_type{&r}; }
+};
+
+} // boost::redis::adapter::detail
+
+#endif // BOOST_REDIS_ADAPTER_RESPONSE_TRAITS_HPP

include/boost/redis/adapter/ignore.hpp

@@ -0,0 +1,37 @@
+/* Copyright (c) 2018-2023 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#ifndef BOOST_REDIS_ADAPTER_IGNORE_HPP
+#define BOOST_REDIS_ADAPTER_IGNORE_HPP
+
+#include <boost/redis/resp3/node.hpp>
+#include <boost/redis/error.hpp>
+#include <boost/system/error_code.hpp>
+#include <string>
+
+namespace boost::redis::adapter
+{
+
+/** @brief An adapter that ignores responses
+ *  @ingroup high-level-api
+ *
+ *  RESP3 errors won't be ignored.
+ */
+struct ignore {
+   void operator()(resp3::basic_node<std::string_view> const& nd, system::error_code& ec)
+   {
+      switch (nd.data_type) {
+         case resp3::type::simple_error: ec = redis::error::resp3_simple_error; break;
+         case resp3::type::blob_error: ec = redis::error::resp3_blob_error; break;
+         case resp3::type::null: ec = redis::error::resp3_null; break;
+         default:;
+      }
+   }
+};
+
+} // boost::redis::adapter
+
+#endif // BOOST_REDIS_ADAPTER_IGNORE_HPP

include/boost/redis/adapter/result.hpp

@@ -0,0 +1,81 @@
+
+/* Copyright (c) 2018-2023 Marcelo Zimbres Silva (mzimbres@gmail.com)
+ *
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE.txt)
+ */
+
+#ifndef BOOST_REDIS_ADAPTER_RESULT_HPP
+#define BOOST_REDIS_ADAPTER_RESULT_HPP
+
+#include <boost/redis/resp3/type.hpp>
+#include <boost/redis/error.hpp>
+#include <boost/system/result.hpp>
+#include <string>
+
+namespace boost::redis::adapter
+{
+
+/** @brief Stores any resp3 error
+ *  @ingroup high-level-api
+ */
+struct error {
+   /// RESP3 error data type.
+   resp3::type data_type = resp3::type::invalid;
+
+   /// Diagnostic error message sent by Redis.
+   std::string diagnostic;
+};
+
+/** @brief Compares two error objects for equality
+ *  @relates error
+ *
+ *  @param a Left hand side error object.
+ *  @param b Right hand side error object.
+ */
+inline bool operator==(error const& a, error const& b)
+{
+   return a.data_type == b.data_type && a.diagnostic == b.diagnostic;
+}
+
+/** @brief Compares two error objects for difference
+ *  @relates error
+ *
+ *  @param a Left hand side error object.
+ *  @param b Right hand side error object.
+ */
+inline bool operator!=(error const& a, error const& b)
+{
+   return !(a == b);
+}
+
+/** @brief Stores response to individual Redis commands
+ *  @ingroup high-level-api
+ */
+template <class Value>
+using result = system::result<Value, error>;
+
+BOOST_NORETURN inline void
+throw_exception_from_error(error const & e, boost::source_location const &)
+{
+   system::error_code ec;
+   switch (e.data_type) {
+      case resp3::type::simple_error:
+         ec = redis::error::resp3_simple_error;
+         break;
+      case resp3::type::blob_error:
+         ec = redis::error::resp3_blob_error;
+         break;
+      case resp3::type::null:
+         ec = redis::error::resp3_null;
+         break;
+      default:
+         BOOST_ASSERT_MSG(false, "Unexpected data type.");
+   }
+
+   throw system::system_error(ec, e.diagnostic);
+}
+
+} // boost::redis::adapter
+
+#endif // BOOST_REDIS_ADAPTER_RESULT_HPP