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94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
/* Copyright (c) 2019 Marcelo Zimbres Silva (mzimbres@gmail.com)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#include <iostream>
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#include <chrono>
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#include <optional>
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#include <aedis/src.hpp>
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#include <aedis/aedis.hpp>
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#include "lib/net_utils.hpp"
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namespace resp3 = aedis::resp3;
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using aedis::redis::command;
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using aedis::redis::make_serializer;
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using resp3::adapt;
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using resp3::node;
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namespace net = aedis::net;
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using net::async_write;
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using net::buffer;
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using net::dynamic_buffer;
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net::awaitable<void> key_expiration()
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{
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try {
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auto socket = co_await connect();
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// Creates and sends the first request.
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std::string request;
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auto sr = make_serializer(request);
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sr.push(command::hello, 3);
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sr.push(command::flushall);
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sr.push(command::set, "key", "Some payload", "EX", "2");
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sr.push(command::get, "key");
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co_await async_write(socket, buffer(request));
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// Will hold the response to get.
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std::optional<std::string> get;
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// Reads the responses.
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std::string rbuffer;
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co_await resp3::async_read(socket, dynamic_buffer(rbuffer)); // hello
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co_await resp3::async_read(socket, dynamic_buffer(rbuffer)); // flushall
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co_await resp3::async_read(socket, dynamic_buffer(rbuffer)); // set
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co_await resp3::async_read(socket, dynamic_buffer(rbuffer), adapt(get));
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std::cout
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<< "Before expiration: " << get.has_value() << ", "
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<< *get << std::endl;
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// Waits some seconds for the key to expire.
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timer tm{socket.get_executor(), std::chrono::seconds{3}};
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co_await tm.async_wait();
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// Creates a request to get after expiration.
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get.reset(); request.clear();
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sr.push(command::get, "key");
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sr.push(command::get, "key");
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sr.push(command::quit);
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co_await async_write(socket, buffer(request));
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// Reads the response to the second request.
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co_await resp3::async_read(socket, dynamic_buffer(rbuffer), adapt(get));
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// Reading without an optional will result in an error.
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std::string str;
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boost::system::error_code ec;
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co_await resp3::async_read(socket, dynamic_buffer(rbuffer),
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adapt(str), net::redirect_error(net::use_awaitable, ec));
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// Quit
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co_await resp3::async_read(socket, dynamic_buffer(rbuffer));
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std::cout << "After expiration (optional): " << get.has_value() << "\n";
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std::cout << "After expiration (non-optional): " << ec.message() << "\n";
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} catch (std::exception const& e) {
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std::cerr << e.what() << std::endl;
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exit(EXIT_FAILURE);
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}
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}
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int main()
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{
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net::io_context ioc;
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co_spawn(ioc, key_expiration(), net::detached);
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ioc.run();
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}
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