JMS queue messages viewing without removing them from the queue

[megatron82]

I want to view ALL messages (message-driven POJOs) of a queue without removing them from the queue. Is there a way to accomplish that?

I found out that with "sessionAcknowledgeMode", I can view one single message before acknowledging and removing it from a queue. But thats not what I want. I want a list of all the message without actually removing them.

THX!

[Andrei Tsibets]

Have a look at JmsTemplate.browse* methods.

[megatron82]

Thanks for the hint...it really helped me out. In the following I'm posting my working source code for future readers.

jmstemplate.browse("requestQueue", new BrowserCallback<RepositoryUpdateRequest>() {
	@Override
	public RepositoryUpdateRequest doInJms(Session session, QueueBrowser browser) throws JMSException {
		System.out.println("Whats in the query?");
		int i = 1;

		Enumeration e = browser.getEnumeration();

		if (e instanceof ActiveMQQueueBrowser) {
			ActiveMQQueueBrowser activemqbrowser = (ActiveMQQueueBrowser) e;

			while (activemqbrowser.hasMoreElements()) {
				Object o = activemqbrowser.nextElement();
				
				if (o instanceof ActiveMQObjectMessage) {
					ActiveMQObjectMessage amq_message = (ActiveMQObjectMessage) o;
					Object obj = amq_message.getObject();

					if (obj instanceof RepositoryUpdateRequest) {
						RepositoryUpdateRequest request = (RepositoryUpdateRequest) obj;
						System.out.println(i + ": " + request.getTEST());
					} else {
						System.out.println(i + ": " + "not a RepositoryUpdateRequest");
					}
					i++;
				}
			}
		}

		return null;
	}

});

[Andrei Tsibets]

You don't need cast to Active MQ classes.
Message in your case can be casted to javax.jms.ObjectMessage.