main.cpp
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/*
* Copyright (c) TrueBrain
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include <TrueMQTT.h>
#include <iostream>
#include <magic_enum.hpp>
#include <thread>
int main()
{
// Create a connection to the local broker.
TrueMQTT::Client client("localhost", 1883, "test");
client.setLogger(
TrueMQTT::Client::LogLevel::WARNING,
[](TrueMQTT::Client::LogLevel level, std::string_view message)
{
std::cout << "Log " << std::string(magic_enum::enum_name(level)) << ": " << message << std::endl;
});
client.setPublishQueue(TrueMQTT::Client::PublishQueueType::FIFO, 10);
client.setErrorCallback(
[](TrueMQTT::Client::Error error, std::string_view message)
{
std::cout << "Error " << std::string(magic_enum::enum_name(error)) << ": " << message << std::endl;
});
client.setLastWill("example/pubsub/lastwill", "example pubsub finished", true);
client.connect();
int stop = 0;
// Subscribe to the topic we will be publishing under in a bit.
client.subscribe(
"example/pubsub/test/subtest",
[&stop](const std::string_view topic, const std::string_view payload)
{
std::cout << "Received message on exact topic " << topic << ": " << payload << std::endl;
stop++;
});
client.subscribe(
"example/pubsub/test/subtest",
[&stop](const std::string_view topic, const std::string_view payload)
{
std::cout << "Received message on exact topic " << topic << " again: " << payload << std::endl;
stop++;
});
client.subscribe(
"example/pubsub/+/subtest",
[&stop](const std::string_view topic, const std::string_view payload)
{
std::cout << "Received message on single wildcard topic " << topic << ": " << payload << std::endl;
stop++;
});
client.subscribe(
"example/pubsub/test/#",
[&stop](const std::string_view topic, const std::string_view payload)
{
std::cout << "Received message on multi wildcard topic " << topic << ": " << payload << std::endl;
stop++;
});
client.subscribe(
"example/pubsub/test/+",
[&stop](const std::string_view topic, const std::string_view payload)
{
/* Never actually called, as we unsubscribe a bit later */
});
client.unsubscribe("example/pubsub/test/+");
// Publish a message on the same topic as we subscribed too.
client.publish("example/pubsub/test/subtest", "Hello World!", false);
// Wait till we receive the message back on our subscription.
while (stop < 4)
{
std::this_thread::sleep_for(std::chrono::milliseconds(10));
}
client.disconnect();
return 0;
}