Configurable MDB

[lauradp]

Hello everybody,

I need a way of instantiating a Message Driven Bean configuring at system start-up time activation config properties (e.g. queue name, selectors and likely the number of bean instances to allocate).

When looking-up queues form remote hosts I'm able to accomplish this goal by doing:

queue = (Queue) ctx.lookup(queueName);

qReceiver = qsession.createReceiver(queue);

qReceiver.setMessageListener(new ListenerClass());

and likely to perform this operation n times if I need n consumers to be listening on the queue.

Is there any way of setting up MDB configuration when at system start up (likely in a startup servlet)?

Thanks in advance,

Laura

[mnovak]

Hi Laura,

it's possible to set activation config property from system property like:

@MessageDriven(name = "mdb1",
  activationConfig = {
...
   @ActivationConfigProperty(propertyName = "destination", propertyValue = "${jms.queue.testQueue}"),
...
}

and start server by:

sh standalone.sh -c standalone-full-ha.xml "-Djms.queue.testQueue=jms/queue/testQueue"

To make this work it's required to enable annotation-property-replacement in server:

[standalone@localhost:9990 /] /subsystem=ee:write-attribute(name=annotation-property-replacement,value=true)

The same replacement can be done also in deployment descriptors for your MDB. The attributes in "ee" subsystem which enable it are:

spec-descriptor-property-replacement

jboss-descriptor-property-replacement

Thanks,

Mirek

[lauradp]

Thanks Mirek, I was looking for something more flexible (like looking-up the some consumer on more than one queue) so I used standard consumers.