// PushConsumer.java.JDK1.2,v 1.5 1998/07/19 01:24:15 mk1 Exp
//
// ============================================================================
//
// 
// = FILENAME
//    PushConsumer.java
//
// = AUTHOR
//    Michael Kircher (mk1@cs.wustl.edu)
//
// = DESCRIPTION
//    This is a Push Consumer which takes the data field of the
//    event and updates with it a Data Handler.
// 
//
// ============================================================================


public class PushConsumer extends RtecEventComm._PushConsumerImplBase
{
  
  public static final int ACE_ES_EVENT_ANY = 0;
  public static final int ACE_ES_EVENT_SHUTDOWN = 1;
  public static final int ACE_ES_EVENT_ACT = 2;
  public static final int ACE_ES_EVENT_NOTIFICATION = 3;
  public static final int ACE_ES_EVENT_TIMEOUT = 4;
  public static final int ACE_ES_EVENT_INTERVAL_TIMEOUT = 5;
  public static final int ACE_ES_EVENT_DEADLINE_TIMEOUT = 6;
  public static final int ACE_ES_GLOBAL_DESIGNATOR = 7;
  public static final int ACE_ES_CONJUNCTION_DESIGNATOR = 8;
  public static final int ACE_ES_DISJUNCTION_DESIGNATOR = 9;
  public static final int ACE_ES_EVENT_UNDEFINED = 16;
  public static final int TOTAL_MESSAGES = 30;

  // Store the number of received events
  private int total_received_ = 0;
  private org.omg.CORBA.ORB orb_;
  private DataHandler dataHandler_;
  private int rt_info_;
  private RtecEventChannelAdmin.EventChannel channel_admin_;
  private RtecEventChannelAdmin.ConsumerAdmin consumer_admin_;
  private RtecEventChannelAdmin.ProxyPushSupplier suppliers_;
  
  public PushConsumer (org.omg.CORBA.ORB orb, DataHandler dataHandler)
    {
      orb_ = orb;
      dataHandler_ = dataHandler;
    }
  
  
  public void push (RtecEventComm.Event[] events)
    {
      if (total_received_ < 5)	  
	System.out.println ("Demo Consumer: Received an event! ->Number: " + total_received_);
      else if (total_received_ == 5)
	System.out.println ("Demo Consumer: Everything is fine. Going to be mute.");
      
      
      if (events.length == 0)
	{
	  System.err.println ("No events");
	}
      else
	{
	  total_received_++;
	  
	  for (int i = 0; i < events.length; ++i)
	    {
	      if(events[i].type_ == ACE_ES_EVENT_NOTIFICATION) 
		{
		  try
		    {
		      dataHandler_.update (events[i].data_.any_value);
		    }
		  catch(org.omg.CORBA.SystemException e) 
		    {
		      System.err.println(e);
		    }
		}		
	    }
	}
    }
  
  public void disconnect_push_consumer() 
    {
      System.out.println ("Demo Consumer: Have to disconnect!");
    }
  
  public void open_consumer (RtecEventChannelAdmin.EventChannel event_channel,
			     RtecScheduler.Scheduler scheduler,
			     String name)
    {
      
      try 
	{
	  
	  // Define Real-time information
	  
	  rt_info_ = scheduler.create (name);
	  
	  scheduler.set (rt_info_,
			  RtecScheduler.Criticality.VERY_LOW_CRITICALITY,
			  new TimeBase.ulonglong (0,0), 
			  new TimeBase.ulonglong (0,0),
			  new TimeBase.ulonglong (0,0),
			  2500000,  // period
			  RtecScheduler.Importance.VERY_LOW_IMPORTANCE,
			  new TimeBase.ulonglong (0,0),
			  1,
			  RtecScheduler.Info_Type.OPERATION);	  	        
	  
	  // Register for Notification and Shutdown events
	  RtecEventComm.Event notification_event = 
	    new RtecEventComm.Event (ACE_ES_EVENT_NOTIFICATION,  0, 
				     1,        // ttl
				     new TimeBase.ulonglong (0,0),
				     new TimeBase.ulonglong (0,0),
				     new TimeBase.ulonglong (0,0),
				     new RtecEventComm.EventData (orb_.create_any ()));
	  
	  RtecEventChannelAdmin.Dependency dependencies[] = new RtecEventChannelAdmin.Dependency[1];  
	  dependencies[0] = new RtecEventChannelAdmin.Dependency (notification_event, rt_info_);
	  	 	  
	  RtecEventChannelAdmin.ConsumerQOS qos = new RtecEventChannelAdmin.ConsumerQOS (dependencies,
                                                                                         false); 
	  
	  // The channel administrator is the event channel we got from the invocation
	  // of this routine
	  channel_admin_ = event_channel;
	  
	  // Connect as a consumer
	  consumer_admin_ = channel_admin_.for_consumers ();
	
	  // Obtain a reference to the proxy push supplier
	  suppliers_ = consumer_admin_.obtain_push_supplier ();
	  
	  suppliers_.connect_push_consumer (this, qos);
	  
	  System.out.println ("Registered the consumer successfully.");
	  
	}
      catch (RtecEventChannelAdmin.TypeError e)
	{
	  System.err.println ("Demo_Consumer.open_consumer: Type error");
	  System.err.println (e);
	}
      catch (RtecEventChannelAdmin.AlreadyConnected e)
	{
	  System.err.println ("Demo_Consumer.open_consumer: Already connected");
	  System.err.println (e);
	}

      catch (RtecScheduler.UNKNOWN_TASK e)
	{
	  System.err.println ("Demo_Consumer.open_consumer: Unknown task");
	  System.err.println (e);
	}
      catch (RtecScheduler.DUPLICATE_NAME e)
	{
	  System.err.println ("Demo_Consumer.open_consumer: Duplicate names");
	  System.err.println (e);
	}
      catch(org.omg.CORBA.SystemException e) 
	{
	  System.err.println(e);
	}		
    }  
}