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90 lines
2.1 KiB
C++
90 lines
2.1 KiB
C++
/* Copyright (c) 2019 - 2021 Marcelo Zimbres Silva (mzimbres at gmail dot 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 <aedis/aedis.hpp>
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#include "types.hpp"
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#include "utils.ipp"
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using aedis::command;
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using aedis::resp3::request;
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using aedis::resp3::response;
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using aedis::resp3::async_read;
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namespace net = aedis::net;
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/* A slightly more elaborate way dealing with requests and responses.
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*
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* This time we send the ping + quit only after the response to the
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* hello command has been received. We also separate the application
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* logic out the coroutine for clarity.
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*/
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/// Adds a new element in the queue if necessary.
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void prepare_next(std::queue<request>& reqs)
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{
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if (std::empty(reqs) || std::size(reqs) == 1)
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reqs.push({});
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}
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/* The function that processes the response has been factored out of
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* the coroutine to simplify application logic.
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*/
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void process_response(std::queue<request>& reqs, response& resp)
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{
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std::cout
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<< reqs.front().commands.front() << ":\n"
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<< resp << std::endl;
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switch (reqs.front().commands.front()) {
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case command::hello:
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prepare_next(reqs);
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reqs.back().push(command::ping);
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reqs.back().push(command::quit);
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break;
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default: {};
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}
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}
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net::awaitable<void> ping()
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{
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try {
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std::queue<request> reqs;
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reqs.push({});
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reqs.back().push(command::hello, 3);
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auto socket = co_await make_connection("127.0.0.1", "6379");
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std::string buffer;
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while (!std::empty(reqs)) {
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co_await async_write(socket, reqs.front());
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while (!std::empty(reqs.front().commands)) {
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response resp;
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co_await async_read(socket, buffer, resp);
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process_response(reqs, resp);
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reqs.front().commands.pop();
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}
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reqs.pop();
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}
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} catch (std::exception const& e) {
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std::cerr << e.what() << std::endl;
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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, ping(), net::detached);
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ioc.run();
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}
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/// \example basic3.cpp
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