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From "Hiram Chirino (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-723) Generate Advisory Messages to setup tear down producer based on consumer activity
Date Thu, 25 May 2006 17:13:51 GMT
    [ https://issues.apache.org/activemq/browse/AMQ-723?page=comments#action_36209 ] 

Hiram Chirino commented on AMQ-723:
-----------------------------------

I don't think the broker needs to generate an advisory message for a time out.  The timeout
can be implemented in the client side API.

> Generate Advisory Messages to setup tear down producer based on consumer activity
> ---------------------------------------------------------------------------------
>
>          Key: AMQ-723
>          URL: https://issues.apache.org/activemq/browse/AMQ-723
>      Project: ActiveMQ
>         Type: New Feature

>   Components: Broker
>     Versions: 4.0
>     Reporter: Kyle Himmerick
>      Fix For: 4.1

>
> Original Estimate: 30 minutes
>         Remaining: 30 minutes
>
> Use Case is a custom producer is setup for each topic and should be shut down when there
are no subscribers left.
> With the getConsumerAdvisoryTopic I can receive messages when a specific subscriber joins
or leaves.  So I can figure out if a consumer is the first, but it would be nice to receive
a separate message here.
> Currently there is nothing that generates advisory messages when there are no subscribers
left.  The getNoTopicConsumersAdvisoryTopic() only fires when a message is sent to a topic
with no consumers, like dead letter queue.  A separate advisory message should be fired when
the last subscriber leaves.  Ideally we could set a delay for this advisory message, so it
could fire if the ConsumerCount remained at 0 for x msec/min.  This would prevent unnecessary
tear down/setup of the producer.

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