org.apache.hadoop.mapreduce.v2.hs

Class HistoryFileManager

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager

All Implemented Interfaces:

Closeable, AutoCloseable, Service

@InterfaceAudience.Public
@InterfaceStability.Unstable
public class HistoryFileManager
extends AbstractService

This class provides a way to interact with history files in a thread safe manor.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	HistoryFileManager.HistoryFileInfo

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

Service.STATE

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager.JobListCache	jobListCache
protected ThreadPoolExecutor	moveToDoneExecutor

Constructor Summary

Constructors

Constructor and Description
HistoryFileManager()

Method Summary

Methods

Modifier and Type	Method and Description
Collection<HistoryFileManager.HistoryFileInfo>	getAllFileInfo()
HistoryFileManager.HistoryFileInfo	getFileInfo(JobId jobId)
protected void	serviceInit(Configuration conf) All initialization code needed by a service.
void	serviceStop() Actions called during the transition to the STOPPED state.
protected void	setMaxHistoryAge(long newValue)

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, serviceStart, 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

jobListCache

protected org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager.JobListCache jobListCache

moveToDoneExecutor

protected ThreadPoolExecutor moveToDoneExecutor

Constructor Detail

HistoryFileManager

public HistoryFileManager()

Method Detail

serviceInit

protected void serviceInit(Configuration conf)
                    throws Exception

Description copied from class: AbstractService

All initialization code needed by a service. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.init(Configuration) prevents re-entrancy. The base implementation checks to see if the subclass has created a new configuration instance, and if so, updates the base class value

Overrides:

serviceInit in class AbstractService

Parameters:

conf - configuration

Throws:

Exception - on a failure -these will be caught, possibly wrapped, and wil; trigger a service stop

serviceStop

public void serviceStop()
                 throws Exception

Description copied from class: AbstractService

Actions called during the transition to the STOPPED state. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.stop() prevents re-entrancy. Implementations MUST write this to be robust against failures, including checks for null references -and for the first failure to not stop other attempts to shut down parts of the service.

Overrides:

serviceStop in class AbstractService

Throws:

Exception - if needed -these will be caught and logged.

getAllFileInfo

public Collection<HistoryFileManager.HistoryFileInfo> getAllFileInfo()
                                                              throws IOException

Throws:

IOException

getFileInfo

public HistoryFileManager.HistoryFileInfo getFileInfo(JobId jobId)
                                               throws IOException

Throws:

IOException

setMaxHistoryAge

protected void setMaxHistoryAge(long newValue)