Examples of org.menacheri.jetclient.event.EventDispatcher

org.menacheri.jetclient.event.EventDispatcher
Event Dispatchers are used by {@link Session} to dispatch the incoming eventon its {@link Session#onEvent(Event)} method to the correct{@link EventHandler}. This interface has methods for adding removing such handlers. @author Abraham Menacherry

{
  @Test
  public void specificEventReceiptOnSpecificEventHandler()
      throws InterruptedException
  {
    EventDispatcher dispatcher = new DefaultEventDispatcher();
    final CountDownLatch latch = new CountDownLatch(1);
    dispatcher.addHandler(new EventHandler()
    {


      @Override
      public void onEvent(Event event)
      {
        latch.countDown();
      }


      @Override
      public int getEventType()
      {
        return Events.SESSION_MESSAGE;
      }
    });


    Event event = Events.event(null, Events.SESSION_MESSAGE);
    dispatcher.fireEvent(event);
    assertTrue(latch.await(1, TimeUnit.SECONDS));
  }

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  }


  @Test
  public void eventReceiptOnANYTypeEventHandler() throws InterruptedException
  {
    EventDispatcher dispatcher = new DefaultEventDispatcher();
    final CountDownLatch latch = new CountDownLatch(5);
    dispatcher.addHandler(new EventHandler()
    {


      @Override
      public void onEvent(Event event)
      {
        latch.countDown();
      }


      @Override
      public int getEventType()
      {
        return Events.ANY;
      }
    });


    Event event = Events.event(null, Events.SESSION_MESSAGE);
    dispatcher.fireEvent(event);
    event = Events.event(null, Events.NETWORK_MESSAGE);
    dispatcher.fireEvent(event);
    event = Events.event(null, Events.EXCEPTION);
    dispatcher.fireEvent(event);
    event = Events.event(null, Events.LOG_IN);
    dispatcher.fireEvent(event);
    event = Events.event(null, Events.CONNECT);
    dispatcher.fireEvent(event);


    assertTrue(latch.await(1, TimeUnit.SECONDS));
  }

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  @Test
  public void nonReceiptOfWrongEventOnSpecificEventHandler()
      throws InterruptedException
  {
    EventDispatcher dispatcher = new DefaultEventDispatcher();
    final CountDownLatch latch = new CountDownLatch(1);
    dispatcher.addHandler(new EventHandler()
    {


      @Override
      public void onEvent(Event event)
      {
        latch.countDown();
      }


      @Override
      public int getEventType()
      {
        return Events.SESSION_MESSAGE;
      }
    });


    Event event = Events.event(null, Events.NETWORK_MESSAGE);
    dispatcher.fireEvent(event);
    assertFalse(latch.await(1, TimeUnit.SECONDS));
  }

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  }


  @Test
  public void eventPublishingPerformance() throws InterruptedException
  {
    EventDispatcher dispatcher = new DefaultEventDispatcher();
    int countOfEvents = 5000000;
    final CountDownLatch latch = new CountDownLatch(countOfEvents);
    dispatcher.addHandler(new EventHandler()
    {


      @Override
      public void onEvent(Event event)
      {
        latch.countDown();
      }


      @Override
      public int getEventType()
      {
        return 0;
      }
    });
    long startTime = System.nanoTime();
    for (int i = 1; i <= countOfEvents; i++)
    {
      Event event = Events.event(null, Events.SESSION_MESSAGE);
      dispatcher.fireEvent(event);
    }
    long time = System.nanoTime() - startTime;
    latch.await(10, TimeUnit.SECONDS);
    System.out.printf("Took  %.3f seconds to send %d int events",
        time / 1e9, countOfEvents);

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org.menacheri.jetclient.event.impl.EventDispatcherTest

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