org.apache.hadoop.hbase.regionserver

Class CompactedHFilesDischarger

java.lang.Object

org.apache.hadoop.hbase.ScheduledChore

org.apache.hadoop.hbase.regionserver.CompactedHFilesDischarger

All Implemented Interfaces:

Runnable

@InterfaceAudience.Private
public class CompactedHFilesDischarger
extends ScheduledChore

A chore service that periodically cleans up the compacted files when there are no active readers using those compacted files and also helps in clearing the block cache of these compacted file entries.

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	LOG
private RegionServerServices	regionServerServices
private boolean	useExecutor

Constructor Summary

Constructors

Constructor and Description
CompactedHFilesDischarger(int period, Stoppable stopper, RegionServerServices regionServerServices)
CompactedHFilesDischarger(int period, Stoppable stopper, RegionServerServices regionServerServices, boolean useExecutor)

Method Summary

Modifier and Type	Method and Description
void	chore() The task to execute on each scheduled execution of the Chore
(package private) boolean	setUseExecutor(boolean useExecutor) CompactedHFilesDischarger runs asynchronously by default using the hosting RegionServer's Executor.

Methods inherited from class org.apache.hadoop.hbase.ScheduledChore

cancel, cancel, choreForTesting, cleanup, getInitialDelay, getName, getPeriod, getStopper, getTimeUnit, initialChore, isInitialChoreComplete, isScheduled, run, toString, triggerNow

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

LOG

private static final org.slf4j.Logger LOG

regionServerServices

private RegionServerServices regionServerServices

useExecutor

private boolean useExecutor

Constructor Detail

CompactedHFilesDischarger

public CompactedHFilesDischarger(int period,
                                 Stoppable stopper,
                                 RegionServerServices regionServerServices)

Parameters:

period - the period of time to sleep between each run

stopper - the stopper

regionServerServices - the region server that starts this chore

CompactedHFilesDischarger

public CompactedHFilesDischarger(int period,
                                 Stoppable stopper,
                                 RegionServerServices regionServerServices,
                                 boolean useExecutor)

Parameters:

period - the period of time to sleep between each run

stopper - the stopper

regionServerServices - the region server that starts this chore

useExecutor - true if to use the region server's executor service, false otherwise

Method Detail

setUseExecutor

boolean setUseExecutor(boolean useExecutor)

CompactedHFilesDischarger runs asynchronously by default using the hosting RegionServer's Executor. In tests it can be useful to force a synchronous cleanup. Use this method to set no-executor before you call run.

Returns:

The old setting for useExecutor

chore

public void chore()

Description copied from class: ScheduledChore

The task to execute on each scheduled execution of the Chore

Specified by:

chore in class ScheduledChore