Nick Dimiduk created HBASE-9507:
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Summary: Promote methods of WALActionsListener to WALObserver
Key: HBASE-9507
URL: https://issues.apache.org/jira/browse/HBASE-9507
Project: HBase
Issue Type: Brainstorming
Components: Coprocessors, wal
Reporter: Nick Dimiduk
Priority: Minor
The interface exposed by WALObserver is quite minimal. To implement anything of
significance based on WAL events, WALActionsListener (at a minimum) is
required. This is demonstrated by the implementation of the replication feature
(not currently possible with coprocessors) and the corresponding interface
exploitation that is the [Side-Effect
Processor|https://github.com/NGDATA/hbase-indexer/tree/master/hbase-sep].
Consider promoting the interface of WALActionsListener into WALObserver. This
goes a long way to being able refactor replication into a coprocessor. This
also removes the duplicate code path for listeners because they're already
available via coprocessor hook.
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