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From "Alan Conway (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-4886) Pass non-const reference to Message in QueueObserver functions.
Date Tue, 28 May 2013 17:06:30 GMT

    [ https://issues.apache.org/jira/browse/QPID-4886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13668455#comment-13668455
] 

Alan Conway commented on QPID-4886:
-----------------------------------

Review at https://reviews.apache.org/r/11378/

The proposal is to leave the const qualifier in QueueObserver, since the name "observer" implies
no change is made to the thing observed. 
We will introduce a new interface for entities that need to modify messages as they go through
the system.
                
> Pass non-const reference to Message in QueueObserver functions.
> ---------------------------------------------------------------
>
>                 Key: QPID-4886
>                 URL: https://issues.apache.org/jira/browse/QPID-4886
>             Project: Qpid
>          Issue Type: Improvement
>          Components: C++ Broker
>    Affects Versions: 0.23
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>             Fix For: 0.23
>
>
> The HA plugin needs to modify a message in QueueObserver::enqueued to attach a HA ID
to it. Other plugins may need to similarly annotate messages at QueueObserver call points.
> Need to remove the "const" qualifier for Message arguments to QueueObserver methods to
enable this.

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