Пример #1
0
  /*
   * @see javax.jms.MessageListener#onMessage(javax.jms.Message)
   *
   * @param message
   */
  @Override
  public void onMessage(Message message) {
    RuntimeCamelException rce = null;
    try {
      final DefaultExchange exchange =
          (DefaultExchange) JmsMessageHelper.createExchange(message, getEndpoint());

      log.debug("Processing Exchange.id:{}", exchange.getExchangeId());

      if (isTransacted() && synchronization != null) {
        exchange.addOnCompletion(synchronization);
      }
      try {
        if (isTransacted() || isSynchronous()) {
          log.debug("  Handling synchronous message: {}", exchange.getIn().getBody());
          handleMessage(exchange);
        } else {
          log.debug("  Handling asynchronous message: {}", exchange.getIn().getBody());
          executor.execute(
              new Runnable() {
                @Override
                public void run() {
                  try {
                    handleMessage(exchange);
                  } catch (Exception e) {
                    exchange.setException(e);
                  }
                }
              });
        }
      } catch (Exception e) {
        if (exchange != null) {
          if (exchange.getException() == null) {
            exchange.setException(e);
          } else {
            throw e;
          }
        }
      }
    } catch (Exception e) {
      rce = wrapRuntimeCamelException(e);
    } finally {
      if (rce != null) {
        throw rce;
      }
    }
  }
Пример #2
0
  /**
   * TODO time out is actually double as it waits for the producer and then waits for the response.
   * Use an atomic long to manage the countdown
   */
  @Override
  public void sendMessage(
      final Exchange exchange,
      final AsyncCallback callback,
      final MessageProducerResources producer,
      final ReleaseProducerCallback releaseProducerCallback)
      throws Exception {
    Message request = getEndpoint().getBinding().makeJmsMessage(exchange, producer.getSession());

    String correlationId =
        exchange.getIn().getHeader(JmsConstants.JMS_CORRELATION_ID, String.class);
    if (correlationId == null) {
      // we append the 'Camel-' prefix to know it was generated by us
      correlationId = GENERATED_CORRELATION_ID_PREFIX + getUuidGenerator().generateUuid();
    }

    Object responseObject = null;
    Exchanger<Object> messageExchanger = new Exchanger<Object>();
    JmsMessageHelper.setCorrelationId(request, correlationId);
    EXCHANGERS.put(correlationId, messageExchanger);

    MessageConsumerResources consumer = consumers.borrowObject();
    JmsMessageHelper.setJMSReplyTo(request, consumer.getReplyToDestination());
    consumers.returnObject(consumer);
    producer.getMessageProducer().send(request);

    // Return the producer to the pool so another waiting producer
    // can move forward
    // without waiting on us to complete the exchange
    try {
      releaseProducerCallback.release(producer);
    } catch (Exception exception) {
      // thrown if the pool is full. safe to ignore.
    }

    try {
      responseObject = messageExchanger.exchange(null, getResponseTimeOut(), TimeUnit.MILLISECONDS);
      EXCHANGERS.remove(correlationId);
    } catch (InterruptedException e) {
      log.debug("Exchanger was interrupted while waiting on response", e);
      exchange.setException(e);
    } catch (TimeoutException e) {
      log.debug("Exchanger timed out while waiting on response", e);
      exchange.setException(e);
    }

    if (exchange.getException() == null) {
      if (responseObject instanceof Throwable) {
        exchange.setException((Throwable) responseObject);
      } else if (responseObject instanceof Message) {
        Message message = (Message) responseObject;

        SjmsMessage response =
            new SjmsMessage(message, consumer.getSession(), getEndpoint().getBinding());
        // the JmsBinding is designed to be "pull-based": it will populate the Camel message on
        // demand
        // therefore, we link Exchange and OUT message before continuing, so that the JmsBinding has
        // full access
        // to everything it may need, and can populate headers, properties, etc. accordingly (solves
        // CAMEL-6218).
        exchange.setOut(response);
      } else {
        exchange.setException(new CamelException("Unknown response type: " + responseObject));
      }
    }

    callback.done(isSynchronous());
  }