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https://issues.apache.org/jira/browse/HBASE-3348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Purtell updated HBASE-3348:
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Attachment: HBASE-3348.patch
Patch contains API changes and fixes some logic bugs I found with coprocessor
integration in HRegion. Not quite ready yet, will put up a new patch on RB then.
> Allow Observers to completely override base function
> ----------------------------------------------------
>
> Key: HBASE-3348
> URL: https://issues.apache.org/jira/browse/HBASE-3348
> Project: HBase
> Issue Type: Sub-task
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Fix For: 0.92.0
>
> Attachments: HBASE-3348.patch
>
>
> Currently an observer can act as a filter or translator but cannot stop a
> subsequent call down to the base method for get, put, delete, etc. This means
> an observer cannot completely override the base function. To deal with this
> we can:
> - Change the preXXX methods to return the same type as the postXXX methods,
> the same return type of the base method.
> - Extend {{Coprocessor.Environment}} with methods that get/set a "should
> continue" flag.
> The framework should check the "should continue" flag before calling the base
> method. If not, just return what was returned by the preXXX method.
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