>Question: What should I do in order for the receiver not to block.
calling the receiveNoWait() method on your QueueReceiver.
Thank you Stephane, but when call receiveNoWait() I get a null pointer exception, which tells me that it did not received the msg.
I guess my user-service.xml has problem, although when I start jboss it DOES NOT complains.
QueueSenderExample.java and QueueReceiverExample.java are both in a package called examples. and the path is c:\example.QueueSenderExample.java and same is for QueueReceiverExample.java and this is how first part of my user-serive.xml file looks like.
It is almost 3 days that I am trying to run a JMS example but I fail, so any help will be appreciated.
Thannk you in advance.
When using a method/API you don't know you better read the Javadoc first ;-)
receiveNoWait() will not block. If a message is available, it will be retrurned to you. If no message is matching your criterias( that is the queue, a selector if any, etc ...) 'null' is returned.
The nullpointerexception you get is simply because you forgot to test wether the method returns you a message or not.
Now, if you are sure you have a message in this queue this might be the problem. Do you know the jmx-console? It allows you to manage your Jboss instance, see http://yourhost:8080/jmx-console
You'll see namely the jboss.mq.destinations domain cotaininsg all your declared queue.
you user service has definitely a problem. Why do you define a QueueManager? What version of JBoss are you running? Yo decalre a queue Named QueueReceiverExample (is it the purpose), put that definition in a xxxx-service.xml (where xxxx can be user but it's not mandatory)
One more thing. Do not mix client/server components. If your QueueReceiverExample is a regular, stand alone java application, it' could be anytwhere, provided you have the jbossall-client.jar in your classpath (that one is in $JBOSS_HOME/client)
Please provide more details about what you are trying to achieve.
Uh uh you're the same guy. So you should already have this code snippet ... Let's summarize your problem in one thread, will you?