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How to browse the DLQ?
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created by <a href="http://community.jboss.org/people/alansmanne">Aurélien Lansmanne</a> in <i>JBoss Messaging</i> - <a href="http://community.jboss.org/message/585449#585449">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hello,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I've been trying to read the messages from the Jboss DLQ for some times... but without success.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>First, i've tried to use a QueueBrowser. I thought it could display the messages in the DLQ as they are stuck there and never received by any client.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre __default_attr="html" class="jive_text_macro jive_macro_code"><p>Queue DLQueue = ServiceLocator.getInstance().getQueue("queue/DLQ");</p><p>QueueConnectionFactory queueConnectionFactory = ServiceLocator.getInstance().getQueueConnectionFactory("ConnectionFactory"); //Service locator is a wrapper that does (QueueConnectionFactory) context.lookup("qConnFactoryName")</p><p>QueueConnection queueConnection = queueConnectionFactory.createQueueConnection();</p><p>QueueSession queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>QueueBrowser DLQBrowser = queueSession.createBrowser(DLQueue);</p><p>Enumeration<?> dlqEnum = DLQBrowser.getEnumeration();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>while (dlqEnum.hasMoreElements()) {</p><p>       Object object = dlqEnum.nextElement();</p><p>       // Do something with object</p><p>}</p><p>queueConnection.close();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>But the enumeration is empty... </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I've also tried to use the JMX-console. When I click on name=DLQ,service=Queue, then listMessageCounter(), i can see that there are indeed 100 messages in the DLQ. But when I try to browse them :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><ul><li>listScheduledMessages() : empty ...</li><li>listMessages() : empty...</li><li>listInProcessMessages() : empty...</li></ul><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Then, I tried to open the HSQL database myself with DBVisualizer to browse the JMS_MESSAGES table. But I was only able to see some messages IDS, but not the message itself.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>My last option is to use a Message Listener on the DLQ and do all the business to store them somewhere I can easily access... if I can't use any of the previous options.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Any help is appreciated. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Aurélien Lansmanne.</p></div>
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