Exemplo n.º 1
0
    /** Processes (at least) the first event in the queue. */
    void serviceEvent() {
      checkState();

      ClientSessionServiceImpl sessionService = ClientSessionServiceImpl.getInstance();
      ManagedQueue<SessionEvent> eventQueue = getQueue();
      DataService dataService = ClientSessionServiceImpl.getDataService();

      for (int i = 0; i < sessionService.eventsPerTxn; i++) {
        SessionEvent event = eventQueue.poll();
        if (event == null) {
          // no more events
          break;
        }

        logger.log(Level.FINEST, "processing event:{0}", event);

        int cost = event.getCost();
        if (cost > 0) {
          dataService.markForUpdate(this);
          writeBufferAvailable += cost;
          if (logger.isLoggable(Level.FINEST)) {
            logger.log(
                Level.FINEST,
                "{0} cleared reservation of " + "{1,number,#} bytes, leaving {2,number,#}",
                this,
                cost,
                writeBufferAvailable);
          }
        }

        event.serviceEvent(this);
      }
    }
Exemplo n.º 2
0
 /**
  * Attempts to enqueue the specified {@code event}, and returns {@code true} if successful, and
  * {@code false} otherwise.
  *
  * @param event the event
  * @return {@code true} if successful, and {@code false} otherwise
  * @throws MessageRejectedException if the cost of the event exceeds the available buffer space
  *     in the queue
  */
 boolean offer(SessionEvent event) {
   int cost = event.getCost();
   if (cost > writeBufferAvailable) {
     ClientSessionServiceImpl sessionService = ClientSessionServiceImpl.getInstance();
     if (sessionService.receiveMessageRejectedOp != null) {
       sessionService.receiveMessageRejectedOp.report();
     }
     throw new MessageRejectedException(
         "Not enough queue space: "
             + writeBufferAvailable
             + " bytes available, "
             + cost
             + " requested");
   }
   boolean success = getQueue().offer(event);
   if (success && cost > 0) {
     ClientSessionServiceImpl.getDataService().markForUpdate(this);
     writeBufferAvailable -= cost;
     if (logger.isLoggable(Level.FINEST)) {
       logger.log(
           Level.FINEST,
           "{0} reserved {1,number,#} leaving {2,number,#}",
           this,
           cost,
           writeBufferAvailable);
     }
   }
   return success;
 }