Package org.apache.hadoop.yarn.server.sharedcachemanager

Class CleanerService

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.hadoop.service.CompositeService

org.apache.hadoop.yarn.server.sharedcachemanager.CleanerService

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, org.apache.hadoop.service.Service

@Private
@Evolving
public class CleanerService
extends org.apache.hadoop.service.CompositeService

The cleaner service that maintains the shared cache area, and cleans up stale entries on a regular basis.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.service.CompositeService

org.apache.hadoop.service.CompositeService.CompositeServiceShutdownHook

Nested classes/interfaces inherited from interface org.apache.hadoop.service.Service

org.apache.hadoop.service.Service.STATE

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	GLOBAL_CLEANER_PID	The name of the global cleaner lock that the cleaner creates to indicate that a cleaning process is in progress.

Fields inherited from class org.apache.hadoop.service.CompositeService

STOP_ONLY_STARTED_SERVICES

Constructor Summary

Constructors

Constructor	Description
CleanerService(SCMStore store)

Method Summary

Modifier and Type	Method	Description
protected void	runCleanerTask()	Execute an on-demand cleaner task.
protected void	serviceInit(org.apache.hadoop.conf.Configuration conf)
protected void	serviceStart()
protected void	serviceStop()

Methods inherited from class org.apache.hadoop.service.CompositeService

addIfService, addService, getServices, removeService

Methods inherited from class org.apache.hadoop.service.AbstractService

close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop

Methods inherited from class java.lang.Object

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

Field Detail

GLOBAL_CLEANER_PID

public static final java.lang.String GLOBAL_CLEANER_PID

The name of the global cleaner lock that the cleaner creates to indicate that a cleaning process is in progress.

See Also:

Constant Field Values

Constructor Detail

CleanerService

public CleanerService(SCMStore store)

Method Detail

serviceInit

protected void serviceInit(org.apache.hadoop.conf.Configuration conf)
                    throws java.lang.Exception

Overrides:

serviceInit in class org.apache.hadoop.service.CompositeService

Throws:

java.lang.Exception

serviceStart

protected void serviceStart()
                     throws java.lang.Exception

Overrides:

serviceStart in class org.apache.hadoop.service.CompositeService

Throws:

java.lang.Exception

serviceStop

protected void serviceStop()
                    throws java.lang.Exception

Overrides:

serviceStop in class org.apache.hadoop.service.CompositeService

Throws:

java.lang.Exception

runCleanerTask

protected void runCleanerTask()

Execute an on-demand cleaner task.