open_source / mqtt-cpp

  /* ****************************************************************************
   * Copyright 2019 Open Systems Development BV                                 *
   *                                                                            *
   * Permission is hereby granted, free of charge, to any person obtaining a    *
   * copy of this software and associated documentation files (the "Software"), *
   * to deal in the Software without restriction, including without limitation  *
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,   *
   * and/or sell copies of the Software, and to permit persons to whom the      *
   * Software is furnished to do so, subject to the following conditions:       *
   *                                                                            *
   * The above copyright notice and this permission notice shall be included in *
   * all copies or substantial portions of the Software.                        *
   *                                                                            *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   *
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    *
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING    *
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER        *
   * DEALINGS IN THE SOFTWARE.                                                  *
   * ***************************************************************************/

  
  // 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.

              std::cout << ".";

              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" );
  
          while (1)
          {
              sleepcp(1, T_MILLI);   // Sleep 1 Sec to give the scheduler the change to interfene.
              std::cout << ".";

          }

      }
      else
      {
          std::cout << "[FAILED]" << std::endl;
          return -1;
      }
      return 0;
  }