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Posted to dev@activemq.apache.org by "Timothy Bish (Resolved) (JIRA)" <ji...@apache.org> on 2011/12/22 16:19:30 UTC

[jira] [Resolved] (AMQ-3436) Support Prioritization Of Messages Pending Dispatch

     [ https://issues.apache.org/jira/browse/AMQ-3436?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Timothy Bish resolved AMQ-3436.
-------------------------------

    Resolution: Fixed

Patch applied with thanks. Required some modifications.  Patch broke some Temp Destination functionality as the TempQueue class has its own init method.  Test also needed a few tweaks as well.
                
> Support Prioritization Of Messages Pending Dispatch
> ---------------------------------------------------
>
>                 Key: AMQ-3436
>                 URL: https://issues.apache.org/jira/browse/AMQ-3436
>             Project: ActiveMQ
>          Issue Type: Improvement
>          Components: Broker
>    Affects Versions: 5.5.0
>            Reporter: Kevin Urciolo
>            Assignee: Timothy Bish
>            Priority: Minor
>             Fix For: 5.6.0
>
>         Attachments: AMQPriorityTest.java, OrderedPendingList.java-patch.txt, PendingList.java-patch.txt, PrioritizedPendingList.java-patch.txt, Queue.java-patch.txt
>
>
> ActiveMQ does not deliver messages in priority order when the following conditions are true:
> 1.  A consumer has prefetch set to one (or zero).
> 2.  The consumer is created (consumerSession.createConsumer) prior to message delivery
> 3.  Large maxPageSize is configured
> The fix is to modify org.apache.activemq.broker.region.Queue to use a PrioritizationPendingList for the message in "pagedInPendingDispatch" so they are dispatched in priority order.
> A test case reproducing the issue is included.
> The patched file deltas are included.

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