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afc270f10e
Summary: related to T15996 folder structure include/async_mqtt5 -> include/boost/mqtt5 namespace async_mqtt5 -> namespace boost::mqtt5 all tabs replaced with 4 spaces (because tabs are banned) boost-like order of includes TODO: fix all docs Reviewers: ivica Reviewed By: ivica Subscribers: iljazovic, miljen Differential Revision: https://repo.mireo.local/D33152
100 lines
3.6 KiB
C++
100 lines
3.6 KiB
C++
//
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// Copyright (c) 2023-2024 Ivica Siladic, Bruno Iljazovic, Korina Simicevic
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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//[timeout_with_parallel_group
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#include <boost/mqtt5/logger.hpp>
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#include <boost/mqtt5/mqtt_client.hpp>
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#include <boost/mqtt5/reason_codes.hpp>
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#include <boost/mqtt5/types.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/experimental/parallel_group.hpp>
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#include <boost/asio/io_context.hpp>
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#include <boost/asio/ip/tcp.hpp>
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#include <boost/asio/steady_timer.hpp>
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#include <array>
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#include <chrono>
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#include <iostream>
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#include <string>
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#include <vector>
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struct config {
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std::string brokers = "broker.hivemq.com";
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uint16_t port = 1883;
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std::string client_id = "async_mqtt5_tester";
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};
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int main(int argc, char** argv) {
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config cfg;
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if (argc == 4) {
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cfg.brokers = argv[1];
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cfg.port = uint16_t(std::stoi(argv[2]));
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cfg.client_id = argv[3];
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}
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boost::asio::io_context ioc;
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// Construct the Client with ``__TCP_SOCKET__`` as the underlying stream and enabled logging.
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// Since we are not establishing a secure connection, set the TlsContext template parameter to std::monostate.
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boost::mqtt5::mqtt_client<
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boost::asio::ip::tcp::socket, std::monostate /* TlsContext */, boost::mqtt5::logger
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> client(ioc, {} /* tls_context */, boost::mqtt5::logger(boost::mqtt5::log_level::info));
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// If you want to use the Client without logging, initialise it with the following line instead.
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//boost::mqtt5::mqtt_client<boost::asio::ip::tcp::socket> client(ioc);
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// Construct the timer.
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boost::asio::steady_timer timer(ioc, std::chrono::seconds(5));
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client.brokers(cfg.brokers, cfg.port) // Broker that we want to connect to.
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.credentials(cfg.client_id) // Set the Client Identifier. (optional)
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.async_run(boost::asio::detached); // Start the Client.
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// Subscribe to a Topic.
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client.async_subscribe(
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{ "test" /* Topic */}, boost::mqtt5::subscribe_props {},
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[](boost::mqtt5::error_code ec, std::vector<boost::mqtt5::reason_code> rcs, boost::mqtt5::suback_props) {
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std::cout << "[subscribe ec]: " << ec.message() << std::endl;
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std::cout << "[subscribe rc]: " << rcs[0].message() << std::endl;
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}
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);
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// Create a parallel group to wait up to 5 seconds to receive a message
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// using client.async_receive(...).
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boost::asio::experimental::make_parallel_group(
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timer.async_wait(boost::asio::deferred),
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client.async_receive(boost::asio::deferred)
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).async_wait(
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boost::asio::experimental::wait_for_one(),
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[&client](
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std::array<std::size_t, 2> ord, // Completion order
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boost::mqtt5::error_code /* timer_ec */, // timer.async_wait(...) handler signature
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// client.async_receive(...) handler signature
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boost::mqtt5::error_code receive_ec,
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std::string topic, std::string payload, boost::mqtt5::publish_props /* props */
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) {
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if (ord[0] == 1) {
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std::cout << "Received a message!" << std::endl;
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std::cout << "[receive ec]: " << receive_ec.message() << std::endl;
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std::cout << "[receive topic]: " << topic << std::endl;
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std::cout << "[receive payload]: " << payload << std::endl;
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}
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else
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std::cout << "Timed out! Did not receive a message within 5 seconds." << std::endl;
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client.cancel();
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}
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);
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ioc.run();
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}
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//]
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