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HBASE-28580 Revert the deprecation for methods in WALObserver #6205

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Sep 6, 2024
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HBASE-28580 Revert the deprecation for methods in WALObserver #6205

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30 changes: 18 additions & 12 deletions hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/WALObserver.java
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Original file line number Diff line number Diff line change
Expand Up @@ -56,25 +56,31 @@
@InterfaceStability.Evolving
public interface WALObserver {
/**
* Called before a {@link WALEdit} is writen to WAL. Do not amend the WALKey. It is
* InterfaceAudience.Private. Changing the WALKey will cause damage.
* @deprecated Since hbase-2.0.0. To be replaced with an alternative that does not expose
* InterfaceAudience classes such as WALKey and WALEdit. Will be removed in
* hbase-3.0.0.
* Called before a {@link WALEdit} is writen to WAL.
* <p>
* The method is marked as deprecated in 2.0.0, but later we abstracted the WALKey interface for
* coprocessors, now it is OK to expose this to coprocessor users, so we revert the deprecation.
* But you still need to be careful while changing {@link WALEdit}, as when reaching here, if you
* add some cells to WALEdit, it will only be written to WAL but no in memstore, but when
* replaying you will get these cells and there are CP hooks to intercept these cells.
* <p>
* See HBASE-28580.
*/
@Deprecated
default void preWALWrite(ObserverContext<? extends WALCoprocessorEnvironment> ctx,
RegionInfo info, WALKey logKey, WALEdit logEdit) throws IOException {
}

/**
* Called after a {@link WALEdit} is writen to WAL. Do not amend the WALKey. It is
* InterfaceAudience.Private. Changing the WALKey will cause damage.
* @deprecated Since hbase-2.0.0. To be replaced with an alternative that does not expose
* InterfaceAudience classes such as WALKey and WALEdit. Will be removed in
* hbase-3.0.0.
* Called after a {@link WALEdit} is writen to WAL.
* <p>
* The method is marked as deprecated in 2.0.0, but later we abstracted the WALKey interface for
* coprocessors, now it is OK to expose this to coprocessor users, so we revert the deprecation.
* But you still need to be careful while changing {@link WALEdit}, as when reaching here, if you
* add some cells to WALEdit, it will only be written to WAL but no in memstore, but when
* replaying you will get these cells and there are CP hooks to intercept these cells.
* <p>
* See HBASE-28580.
*/
@Deprecated
default void postWALWrite(ObserverContext<? extends WALCoprocessorEnvironment> ctx,
RegionInfo info, WALKey logKey, WALEdit logEdit) throws IOException {
}
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