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From "Steve Loughran (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-3995) Add support for static service lifecycle listeners .
Date Fri, 09 Mar 2012 20:52:57 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3995?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steve Loughran updated MAPREDUCE-3995:
--------------------------------------

    Status: Open  (was: Patch Available)
    
> Add support for  static service lifecycle listeners .
> -----------------------------------------------------
>
>                 Key: MAPREDUCE-3995
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3995
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv2
>    Affects Versions: 0.23.1, 0.24.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>         Attachments: MAPREDUCE-3995.patch, MAPREDUCE-3995.patch
>
>
> Add support to {{AbstractService}} that allow callers to register listeners for all instances.
The existing listener interface could be used. This allows management tools to hook into the
events.
> The static listeners would be invoked for all state changes except creation (base class
shouldn't be handing out references to itself at this point).
> These static events could all be async, pushed through a shared {{ConcurrentLinkedQueue}};
failures logged at warn and the rest of the listeners invoked.

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