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mkurley · Posted: Tue Jun 22, 2004 12:52 pm Post subject:

I have a situation where multiple processes can be listening to a queue for messages based on different filters. For example, the three processes below are listening to the queue RESPONSE with different filters.

Process Filter
1 foo
2 foobar
3 barfoo

Each of these processes can receive 100+ responses. My questions are how is the filter mechanism implemented? Do the processes keep looking at all of the messages (polling) and checking their filter against each message? Or is it implemented a more efficient way? As we start up more processes the performance is degrading significantly and I am wondering if it is because the filters have more message to keep checking.

The code below shows how a reqister a filter with a QueueReceiver.

Queue responseQueue= session.createQueue(recieveQueue);
receiver= session.createReceiver(responseQueue,filter);
receiver.setMessageListener(mqListener);

Thanks for the help in advance.
Mark Kurley