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From "Matteo Bertozzi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15481) Add pre/post roll to WALObserver
Date Fri, 18 Mar 2016 19:05:33 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15201977#comment-15201977
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Matteo Bertozzi commented on HBASE-15481:
-----------------------------------------

no you add extra stuff that does not make sense. Since instead of just subscribing to a listener
you have to Implement from a coprocessor and add yourself in the coprocessor list.  You can't
probably use the base coproc class because you may already inherit from something so you end
up with lots of methods that you don't need. (aside the extra cp  perf overhead) 

> Add pre/post roll to WALObserver
> --------------------------------
>
>                 Key: HBASE-15481
>                 URL: https://issues.apache.org/jira/browse/HBASE-15481
>             Project: HBase
>          Issue Type: New Feature
>    Affects Versions: 1.3.0
>            Reporter: Matteo Bertozzi
>            Assignee: Matteo Bertozzi
>            Priority: Trivial
>             Fix For: 2.0.0, 1.3.0
>
>         Attachments: HBASE-15481-v0.patch, HBASE-15481-v1.patch
>
>
> currently the WALObserver has only a pre/post Write. It will be useful to have a pre/post
Roll too. 



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