[jira] [Created] (HBASE-10162) Add RegionObserver lifecycle hook to be called when region is available

["Gary Helmling (JIRA)" <ji...@apache.org>]

Gary Helmling created HBASE-10162:
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             Summary: Add RegionObserver lifecycle hook to be called when region is available
                 Key: HBASE-10162
                 URL: https://issues.apache.org/jira/browse/HBASE-10162
             Project: HBase
          Issue Type: Improvement
          Components: Coprocessors
            Reporter: Gary Helmling


Over in HBASE-10161 and HBASE-10148, there is discussion of the need to modify existing coprocessors, which previously performed initialization only in postOpen(), in order to account for the new log replay mechanism happening post open.

This points out that we have a hole in coprocessor lifecycle management which caused the use of region lifecycle hooks (postOpen()) in the first place.

Instead of requiring coprocessor authors to hook into region lifecycle methods for initialization, we should provide an explicit implicit lifecycle hook for coprocessor authors to use when region open, log replay (and any future requirements) are complete, say initializeWhenAvailable() (open to better names).



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