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From "Robbie Gemmell" <robbie.gemm...@gmail.com>
Subject [RFC] [Java] QPID-2018 Clear queue doesn't clear acquired messages which is a little confusing if that's all there is.
Date Sun, 09 Aug 2009 20:41:17 GMT
The clearQueue method of (Simple)AMQQueue actually already returns a long indicating the number
of messages deleted, but the AMQQueueMBean clearQueue() method ignores this and just has a
void return value. The value is being used in the method response message of the QueuePurgeHandler
to report the number of deleted messages, and presumably that needs to stay the way it is.

Checks for undeleted messages could be made using this number along with the before/after
MessageCount, but of course general queue activity during the process could cause such a check
to reach the wrong conclusion. In order to accurately report the number of messages not deleted
due to being in an acquired state a new 'clearQueueAndReportNumAcquired' method would need
to be added to (Simple)AMQQueue, does that seem ok to everyone? The only real alternative
is to start using the return value of the existing method in the MBean and have the console
indicate how many messages were deleted, rather than how many were not. Thoughts?


> -----Original Message-----
> From: Aidan Skinner (JIRA) 
> Sent: 03 August 2009 16:23 
> The clear queue button prompts but doesn't actually clear the queue. I
> suspect because all the messages have been acquired by consumers. This
> should probably display a better error message if there are acquired
> messages which can't be cleared. An int return of uncleared ones maybe?

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