RE: Non-destructive listener?

> From: Nicolaus.Bauman-SWCg6hSX5lit/[email protected]
> 
> Sure, but doesn't a QueueBrowser have the issue of sometimes 
> mising a message that might have been picked up by another 
> listener? In other words, can a QueueBrowser _miss_ a message?

Yes, a QueueBrowser can miss a message if it is being consumed
by a QueueReceiver. However, you can get around this by using a
QueueBrowser to scan the queue for a particular message, and then
use a QueueReceiver to consume the message by selecting on 
the message's JMSMessageID. 
I have used this approach in the past, but wouldn't recommend it - 
its fairly resource intensive.
Much better off using topics.

-Tim

> 
> -----Original Message-----
> From: openjms-user-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> [mailto:openjms-user-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org]On Behalf Of 
> Tim Anderson
> Sent: Tuesday, November 01, 2005 8:40 PM
> To: [email protected]
> Subject: RE: [openjms-user] Non-destructive listener?
> 
> 
> For queues, use a QueueBrowser.
> For topics, each subscriber sees its own copy of a message to 
> the topic, so the MessageListener is 'non-destructive' 
> with respect to other subscribers to the same topic.
> 
> -Tim
> 
> > -----Original Message-----
> > From: openjms-user-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> > [mailto:openjms-user-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org] On Behalf Of 
> > Nicolaus.Bauman-SWCg6hSX5lit/[email protected]
> > Sent: Wednesday, 2 November 2005 7:50 AM
> > To: [email protected]
> > Subject: [openjms-user] Non-destructive listener?
> > 
> > Is it possible to have a MessageListener that reads non-destructive?
> > 
> > Nicolaus Bauman
> > Developer: TIR - SPS
> > * 612.667.2170
> > * 612.232.7120
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