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