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https://issues.apache.org/jira/browse/ZOOKEEPER-549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mahadev konar updated ZOOKEEPER-549:
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      Resolution: Fixed
    Release Note: Refactor followers code into Learner from which followers and 
observers will inherit.
    Hadoop Flags: [Reviewed]
          Status: Resolved  (was: Patch Available)

I just committed this. thanks henry.

> Refactor Followers and related classes into a Peer->Follower hierarchy in 
> preparation for Observers
> ---------------------------------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-549
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-549
>             Project: Zookeeper
>          Issue Type: Improvement
>          Components: quorum, server
>    Affects Versions: 3.2.1
>            Reporter: Henry Robinson
>            Assignee: Henry Robinson
>             Fix For: 3.3.0
>
>         Attachments: ZOOKEEPER-549.patch, ZOOKEEPER-549.patch, 
> ZOOKEEPER-549.patch, ZOOKEEPER-549.patch
>
>
> For the Observers patch (ZOOKEEPER-368), a lot of functionality is shared 
> between Followers and Observers. To avoid copying code, it makes sense to 
> push the common code into a parent Peer class and specialise it for Followers 
> and Observers. At the same time, some of the lengthier methods in Follower 
> can be broken up to make the code more readable. 

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