org.apache.hadoop.hbase.procedure2.store

Interface ProcedureStore.ProcedureStoreListener

Enclosing interface:

ProcedureStore

public static interface ProcedureStore.ProcedureStoreListener

Store listener interface.

The main process should register a listener and respond to the store events.

Method Summary

Modifier and Type	Method and Description
default void	abortProcess() triggered when the store is not able to write out data.
default void	forceUpdate(long[] procIds) Suggest that the upper layer should update the state of some procedures.
default void	postSync() triggered when the store sync is completed.

Method Detail

postSync

default void postSync()

triggered when the store sync is completed.

abortProcess

default void abortProcess()

triggered when the store is not able to write out data. the main process should abort.

forceUpdate

default void forceUpdate(long[] procIds)

Suggest that the upper layer should update the state of some procedures. Ignore this call will not effect correctness but performance.

For a WAL based ProcedureStore implementation, if all the procedures stored in a WAL file have been deleted, or updated later in another WAL file, then we can delete the WAL file. If there are old procedures in a WAL file which are never deleted or updated, then we can not delete the WAL file and this will cause we hold lots of WAL file and slow down the master restarts. So here we introduce this method to tell the upper layer that please update the states of these procedures so that we can delete the old WAL file.

Parameters:

procIds - the id for the procedures