examples/sub/main.cpp

/* ****************************************************************************
 * Copyright 2019 Open Systems Development BV                                 *
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   *
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// std
#include <iostream>
#include <unistd.h>
#include <chrono>
#include "subscriber.h"
const int MAX_LOOP_COUNT = 10;
enum TIME_RES
{
    T_MICRO,
    T_MILLI,
    T_SECONDS
};
std::uint64_t getEpochUSecs()
{
    auto tsUSec =std::chrono::time_point_cast<std::chrono::microseconds>(std::chrono::system_clock::now());
    return static_cast<std::uint64_t>(tsUSec.time_since_epoch().count());
}
void sleepcp( int number, TIME_RES resolution = T_MILLI )    // Cross-platform sleep function
{
    int factor = 0; // Should not happen..
    switch( resolution )
    {
        case T_MICRO:
            factor = 1;
            break;
        case T_MILLI:
            factor = 1000;
            break;
        case T_SECONDS:
            factor = 1000000;
        break;
    }
    usleep( number * factor );
}
int main( int argc, char* argv[] )
{
    int loop_counter = 0;
    // Satisfy the compiler
    (void)argc;
    (void)argv;
    std::cout << "Creating the subscriber : ";
    // Create the subscriber
    Subscriber *pSubscriber = new Subscriber( "Test_Subscriber" );
    if( pSubscriber != nullptr )
    {
        std::cout << "[OK]" << std::endl;
        std::cout << "Connecting to the test-broker : " << std::endl;
        pSubscriber->connect( "localhost", 1883, "", "", "test/subscriber/LWT", "Subscriber disconnected." );
        std::cout << "Subscribing to the test-topic....." << std::endl;
        pSubscriber->subscribe( "test/publisher/TestPublisher_0" );
        pSubscriber->subscribe( "test/publisher/TestPublisher_1" );
        pSubscriber->subscribe( "test/publisher/TestPublisher_2" );
        pSubscriber->subscribe( "test/publisher/TestPublisher_3" );
        // Start a loop to give the subscriber the possibility to do its work.
        while (loop_counter < MAX_LOOP_COUNT)
        {
            sleepcp( 1, T_SECONDS );   // Sleep 1 Sec to give the scheduler the change to interfene.
            loop_counter++;
        }
        std::cout << "Unsubscribing from test/publisher/#" << std::endl;
        pSubscriber->unsubscribe("test/publisher/#" );
        pSubscriber->unsubscribe( "test/publisher/TestPublisher_0" );
        pSubscriber->unsubscribe( "test/publisher/TestPublisher_1" );
        pSubscriber->unsubscribe( "test/publisher/TestPublisher_2" );
        pSubscriber->unsubscribe( "test/publisher/TestPublisher_3" );
        // Start a loop to give the subscriber the possibility to do its work.
        while (loop_counter < MAX_LOOP_COUNT)
        {
            sleepcp( 1, T_SECONDS );   // Sleep 1 Sec to give the scheduler the change to interfene.
            loop_counter++;
        }
        pSubscriber->subscribe("test/publisher/#");
        while (1)
        {
            sleepcp(1, T_MILLI);   // Sleep 1 mSec to give the scheduler the change to interfene.
        }
    }
    else
    {
        std::cout << "[FAILED]" << std::endl;
        return -1;
    }
    return 0;
}