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From "Robbie Gemmell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-4908) [Java Broker] Expose queue attributes MessageGroupKey and MessageGroupSharedGroups via queue MBean
Date Wed, 05 Jun 2013 14:34:20 GMT

    [ https://issues.apache.org/jira/browse/QPID-4908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13675968#comment-13675968
] 

Robbie Gemmell commented on QPID-4908:
--------------------------------------

{code}
+    @MBeanAttribute(name="MessageGroupSharedGroups", description="Indicates C++ compatibility
mode, the Broker enforces a looser guarantee, nameley that all the currently unacknowledged
messages in a group will be sent to the same consumer. This means that only one consumer can
be processing messages from a particular group at a given time. When the consumer acknowledges
all of its acquired messages, then the broker may pass the next pending message from that
group to a different consumer")
+    boolean isMessageGroupSharedGroups();
{code}

The attribute description for shared groups seems rather verbose. Anyone using it should be
reading the documentation for grouping to understand it fully, so this just needs to be a
small pointer. What about something simpler like "If set indicates that while two messages
of the same group cannot be processed by different consumers concurrently, no guarantee is
made that subsequent messages are always sent to the same consumer"?
                
> [Java Broker] Expose queue attributes MessageGroupKey and MessageGroupSharedGroups via
queue MBean
> --------------------------------------------------------------------------------------------------
>
>                 Key: QPID-4908
>                 URL: https://issues.apache.org/jira/browse/QPID-4908
>             Project: Qpid
>          Issue Type: Improvement
>          Components: Java Broker
>    Affects Versions: 0.18, 0.20, 0.22
>            Reporter: Alex Rudyy
>            Assignee: Robbie Gemmell
>             Fix For: 0.23
>
>
> Expose queue attributes MessageGroupKey and MessageGroupSharedGroups via queue MBean

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