C++ Consumer::event_count方法代码示例

//.........这里部分代码省略.........

      receiver->connect (pub);

      // **************** THAT COMPLETES THE FEDERATION SETUP

      // **************** HERE STARTS THE CLIENT SETUP

      // First let us create a consumer and connect it to the event
      // channel
      Consumer consumer (valuetype);
      RtecEventChannelAdmin::ConsumerAdmin_var consumer_admin =
        event_channel->for_consumers ();
      consumer.connect (consumer_admin.in ());

      // **************** THAT COMPLETES THE CLIENT SETUP

      // **************** HERE STARTS THE EVENT LOOP

      // Wait for events, including incoming multicast data.
      // We could also use orb->run(), but that will not let us
      // terminate the application in a nice way.
      for (int i = 0; i != 100; ++i)
        {
          CORBA::Boolean there_is_work =
            orb->work_pending ();
          if (there_is_work)
            {
              // We use a TAO extension. The CORBA mechanism does not
              // provide any decent way to control the duration of
              // perform_work() or work_pending(), so just calling
              // them results in a spin loop.
              ACE_Time_Value tv (0, 50000);
              orb->perform_work (tv);
            }
          ACE_Time_Value tv (0, 100000);
          ACE_OS::sleep (tv);
          if (consumer.event_count () == 25)
          {
            break;
          }
        }

      // **************** THAT COMPLETES THE EVENT LOOP

      // **************** HERE STARTS THE CLEANUP CODE

      consumer.disconnect ();

      // Now let us close the Receiver
      receiver->shutdown ();

      int const r = mcast_eh.shutdown ();

      if (r == -1)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "Closing MCast event handler\n"), 1);
        }

      // The event channel must be destroyed, so it can release its
      // resources, and inform all the clients that are still
      // connected that it is going away.
      event_channel->destroy ();

      // Deactivating the event channel implementation is not strictly
      // required, the POA will do it for us, but it is good manners:
      {
        // Using _this() activates with the default POA, we must gain
        // access to that POA to deactivate the object.
        // Notice that we 'know' that the default POA for this servant
        // is the root POA, but the code is more robust if we don't
        // rely on that.
        PortableServer::POA_var poa =
          ec_impl._default_POA ();
        // Get the Object Id used for the servant..
        PortableServer::ObjectId_var oid =
          poa->servant_to_id (&ec_impl);
        // Deactivate the object
        poa->deactivate_object (oid.in ());
      }

      // Now we can destroy the POA, the flags mean that we want to
      // wait until the POA is really destroyed
      poa->destroy (1, 1);

      // Finally destroy the ORB
      orb->destroy ();

      // **************** THAT COMPLETES THE CLEANUP CODE

      ACE_DEBUG ((LM_DEBUG,
                  "UDP receiver ready\n"));
    }
  catch (const CORBA::Exception& ex)
    {
      ex._tao_print_exception ("Service");
      return 1;
    }
  return 0;
}