[
https://issues.apache.org/jira/browse/HBASE-22623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16886347#comment-16886347
]
Geoffrey Jacoby commented on HBASE-22623:
-----------------------------------------
I think Append and Increment use a different code path (see HRegion.doDelta)
and so would have to be instrumented a different way, perhaps with extra
coprocessor hooks, one for Increment and one for Append. (The existing Append
and Increment pre-hooks don't take a convenient "carrier" object like the batch
mutations do, and already use their return values for other purposes.)
checkAndXXX seems to eventually go down the same batch mutation path (see
HRegion:4287) so the MiniBatchOperationInProgress solution above would work for
them.
They're unrelated changes though, so it
> 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.
--
This message was sent by Atlassian JIRA
(v7.6.14#76016)
