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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:
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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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