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https://issues.apache.org/activemq/browse/AMQ-2779?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary Tully resolved AMQ-2779.
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Resolution: Fixed
implemented in r954540
> Propagate queue subscription selectors to virtual topic dispatch such that
> unmatched messages do not pile up on subscription queues
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: AMQ-2779
> URL: https://issues.apache.org/activemq/browse/AMQ-2779
> Project: ActiveMQ
> Issue Type: New Feature
> Components: Selector
> Affects Versions: 5.3.2
> Environment: all
> Reporter: Gary Tully
> Assignee: Gary Tully
> Fix For: 5.4.0
>
>
> With virtual topics each consumer can get its own queue or share an existing
> queue. http://activemq.apache.org/virtual-destinations.html
> Consumers which share a queue, can use selectors to partition the consumer
> queue but individual consumers that use selectors run into a problem in that
> the dispatch to the queue does not take account of the selector and all
> messages are dispatched to the queue. Over time, the unmatched messages build
> up on the queue.
> Through static configuration it is possible to arrange that the destination
> queues are filtered, but this solution is static.
> An alternative approach, that does impose a cpu hit during dispatch (as the
> selectors are executed twice) can provide a neat solution. Making a virtual
> topic selectorAware allows the destination interceptor to only dispatch
> messages that match the selector of one of the existing subscriptions. In
> this way, no unmatched messages will be dispatched to the subscription
> queues. In xml configuration, the following will make all topic dispatch
> respect the selectors of the existing subscriptions:{code}
> <broker xmlns="http://activemq.apache.org/schema/core";>
> <destinationInterceptors>
> <virtualDestinationInterceptor>
> <virtualDestinations>
> <virtualTopic name=">" selectorAware="true"/>
> </virtualDestinations>
> </virtualDestinationInterceptor>
> </destinationInterceptors>
> </broker>{code}
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