[ https://issues.apache.org/activemq/browse/AMQ-723?page=all ]
james strachan resolved AMQ-723.
--------------------------------
Resolution: Fixed
I think this is now resolved by just using the aforementioned selector
(consumerCount=0) on the subscription to consumer advisories
> 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
> Issue Type: New Feature
> Components: Broker
> Affects Versions: 4.0
> Reporter: Kyle Himmerick
> Fix For: 4.1
>
> Original Estimate: 30 minutes
> Remaining Estimate: 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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