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, org.apache.hadoop.service.Service

@InterfaceAudience.Public
@InterfaceStability.Unstable
public class HistoryFileManager
extends org.apache.hadoop.service.AbstractService

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

Nested Class Summary

class

HistoryFileManager.HistoryFileInfo

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

org.apache.hadoop.service.Service.STATE

Field Summary

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

Constructor Summary

HistoryFileManager()

Method Summary

protected org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager.JobListCache	createJobListCache()
protected boolean	deleteDir(org.apache.hadoop.fs.FileStatus serialDir)
protected List<org.apache.hadoop.fs.FileStatus>	findTimestampedDirectories() Finds all history directories with a timestamp component by scanning the filesystem.
Collection<HistoryFileManager.HistoryFileInfo>	getAllFileInfo()
HistoryFileManager.HistoryFileInfo	getFileInfo(org.apache.hadoop.mapreduce.v2.api.records.JobId jobId)
protected List<org.apache.hadoop.fs.FileStatus>	scanDirectoryForHistoryFiles(org.apache.hadoop.fs.Path path, org.apache.hadoop.fs.FileContext fc)
protected void	serviceInit(org.apache.hadoop.conf.Configuration conf)
void	serviceStop()
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(org.apache.hadoop.conf.Configuration conf)
                    throws Exception

Overrides:

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

Throws:

Exception

serviceStop

public void serviceStop()
                 throws Exception

Overrides:

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

Throws:

Exception

createJobListCache

protected org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager.JobListCache createJobListCache()

scanDirectoryForHistoryFiles

protected List<org.apache.hadoop.fs.FileStatus> scanDirectoryForHistoryFiles(org.apache.hadoop.fs.Path path,
                                                                             org.apache.hadoop.fs.FileContext fc)
                                                                      throws IOException

Throws:

IOException

findTimestampedDirectories

protected List<org.apache.hadoop.fs.FileStatus> findTimestampedDirectories()
                                                                    throws IOException

Finds all history directories with a timestamp component by scanning the filesystem. Used when the JobHistory server is started.

Returns:

list of history directories

Throws:

IOException

getAllFileInfo

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

Throws:

IOException

getFileInfo

public HistoryFileManager.HistoryFileInfo getFileInfo(org.apache.hadoop.mapreduce.v2.api.records.JobId jobId)
                                               throws IOException

Throws:

IOException

deleteDir

protected boolean deleteDir(org.apache.hadoop.fs.FileStatus serialDir)
                     throws org.apache.hadoop.security.AccessControlException,
                            FileNotFoundException,
                            org.apache.hadoop.fs.UnsupportedFileSystemException,
                            IOException

Throws:

org.apache.hadoop.security.AccessControlException

FileNotFoundException

org.apache.hadoop.fs.UnsupportedFileSystemException

IOException

setMaxHistoryAge

protected void setMaxHistoryAge(long newValue)