I'm having a seam page, which should invoke an action, whenever a JMS message
is published to a topic as described in the reference manual.
I followed the examples and got the page to invoke a javascript callback
method, whenever a message is published after the page has subscribed to the
topic.
Currently the subscribtion is done on page load. This leads to two issues:
1) Whenever the page is re-rendered (e.g. after a button is clicked), the page
subscribes to the topic again and more importantly as a new listener (new
polling token).
So when a message is sent to the topic in an action method of the same page the
message is lost (and the callback method is never invoked).
2) The subscribers are piling up on the topic as verifiable by invoking
listSubscriptionsAsText() on the topic bean in the JMX console.
So finally, I'd like to ask, if anyone has some ideas on how to solve this
issues or could give me any pointers.
How could a subscription be made page scoped and not request scoped?
How could I unsubscribe from a topic whenever the page is closed?
Additionally I've realized that the subscriptions are done in a non-durable
fashion. Is it possible to subscribe as a durable listener?
Thanks for any hints,
Kurt
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