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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14232) Backwards compatiblity support for new MasterObserver APIs
Date Wed, 26 Aug 2015 20:24:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14715445#comment-14715445
] 

Andrew Purtell commented on HBASE-14232:
----------------------------------------

+1

Small change, I'll apply to both branches, no need to provide a 0.98 patch. 

> Backwards compatiblity support for new MasterObserver APIs
> ----------------------------------------------------------
>
>                 Key: HBASE-14232
>                 URL: https://issues.apache.org/jira/browse/HBASE-14232
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Andrew Purtell
>            Assignee: Francis Liu
>              Labels: hbase-6721
>             Fix For: hbase-6721
>
>         Attachments: HBASE-14232_hbase-6721.patch
>
>
> The group assignment changes introduce new methods to the MasterObserver interface. This
is a concern for things like Apache Phoenix. (See their IndexMasterObserver, etc.) We can
handle this by using compatibility helpers that won't attempt to invoke the new APIs on MasterObservers
that do not implement them. 



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