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vmurali_au · Posted: Fri Apr 09, 2004 4:56 am Post subject:

In our application, a listener processes the messages in the Queue Q1 and makes a database updation, if it is successful then removes the message from the Queue Q1.

If the DB cannot be updated at the time due to Invalid message/DB connection or resource not available, then the message is backedout & putback into the Queue. The listener then sleeps for 30 seconds and tries it again. If the above process is unsuccessful for 3 times, then the message is deleted from the Queue Q1.

As you can see, when the listener sleeps after backout due to this message, the processing of other messages at the back of the queue are also delayed.

We are thinking of putting the message at the back of the queue (thus we can remove the sleep used previously), so the other messages can be processed during this time.

The problem is, we want to increment a field in the message (as a counter), each time we put the message back into the queue, and query it, if it is greater than 3, then the message can be put into some other error queue. Is there any attribute available in the message, which we can use in this regard?

In the new case,As we are backing out & putting the message at back (at the back of the queue) the backout count is ignored (during the MQPUT call), So i guess we can't use the backout count in this case. What other field can we use?