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https://issues.apache.org/jira/browse/HBASE-22623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16902673#comment-16902673
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Geoffrey Jacoby commented on HBASE-22623:
-----------------------------------------
[~Apache9] - I apologize for being rude in my last reply. WALObserver vs
RegionObserver's an easy mistake to make.
What method would you like to be marked as deprecated? preWALWrite? Looks like
it already is.
As for WALEdit, the original comments warning developers not to touch it remain
in the current version of the patch, as do the IA.Private attributes on the
mutator methods like add.
> Add RegionObserver coprocessor hook for preWALAppend
> ----------------------------------------------------
>
> Key: HBASE-22623
> URL: https://issues.apache.org/jira/browse/HBASE-22623
> Project: HBase
> Issue Type: New Feature
> Reporter: Geoffrey Jacoby
> Assignee: Geoffrey Jacoby
> Priority: Major
> Fix For: 3.0.0, 1.5.0, 2.3.0
>
>
> While many coprocessor hooks expose the WALEdit to implementing coprocs,
> there aren't any that expose the WALKey before it's created and added to the
> WALEntry.
> It's sometimes useful for coprocessors to be able to edit the WALKey, for
> example to add extended attributes using the fields to be added in
> HBASE-22622.
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