Finding which recipients did not dequeue a message

Question

Hello
Is there a way with a multiconsumer queue to fid out which recipients in the list have not dequeued the message?
The scenario is this. We have a number of daemon type processes that sit on queues, processing whatever messages they need to. We need a way of finding out if each daemon is alive and kicking.
The way I thought of doing this was to set up a multiconsumer queue and enqueue a message with the list of recipients being each daemon process, and set an expiration time of say 10 seconds. The daemons listen to their normal work queue and the "are you alive" queue, and just dequeue any messages on the latter. If the message is not dequeued by all recipients within the time limit, the message will be moved to the exception queue. The process that sent out the request can then just listen on the exception queue for a mesage comming back, but it needs to know which recipient did not dequeue it's message.
So is it possible to find out which recipients did not dequeue the message just from the exceptions queue and supporting meta data tables? Does this sound like a reasonable approach?
David

Answer 1

Yes, you can, use the queue table view. It has the consumer name column. View is automatically created [by default] when the table is created.
All the queue table view name start with AQ$<Queue table name>.
For example :- if a queue table name is customer_qt then the view name would be aq$customer_qt.
Regards,
Sanjeev