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POLong traitement in a onMessage() : How to handle ? I want this method to be called by a thread
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  1. POLong traitement in a onMessage() : How to handle ? I want this method to be called by a thread
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    copied!<p>I do some heavy traitement at reception of JMS message, with high risk of timeout. </p> <p>whole point of using JMS for me is to allow this kind of computation to be done asynchronisely. ( I dont want my other consumer to block if one of them block, i dont want my producer to block, ever ). <strong>ideally, i also want my consumer to be able to receive second message during computation of first one</strong></p> <p>Right now, i'm using unique <a href="http://download.oracle.com/javaee/5/api/javax/jms/Session.html%20javax.jms.Session" rel="nofollow">javax.jms.Session</a> for sending, and consuming my message. I'm aware it was conception mistake. As doc state : </p> <blockquote> <p>session can create and service multiple message producers and consumers.</p> </blockquote> <p>But also :</p> <blockquote> <p>If client desires to have one thread produce messages while others consume them, client should use separate session for its producing thread.</p> </blockquote> <p>solution could be to use session for producer, and different session for each consumer, but consumers will still be able to handle only one message at time</p> <p><strong>For my understanding onMessage method is called by Jms Provider ( ActiveMq in my case ). Could any configuration allow this call to be call in several thread ?</strong></p> <p>Maybe this question is reflect of major flaw in my understanding of how JMS should be use / my conception. Please fell free to discuss ;)</p> <p>Thanks !</p> <p>Edit : </p> <p>my problem in one sentence : </p> <ul> <li>if i have 2 consumer, and if one of them take long time to process onMessge, all other consumer will blocK. </li> </ul> <p><strong>What is done today :</strong> I'm using a <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/util/concurrent/Executor.html" rel="nofollow">java.util.concurent.Executor</a>, but i'm not a big fan of this solution. I'm in a Tomcat application server context, and already using too much thread, i will like to delegate this responsability to a more robust bunch of code. ( Eg : activeMq )</p> <p>Edit 2 : </p> <p>More detail : </p> <ul> <li><p>I dont use transactional session </p></li> <li><p>I use Auto_Acknoledge</p></li> </ul>
 

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