alluxio.master

Class MasterContext

java.lang.Object

alluxio.master.MasterContext

public final class MasterContext
extends Object

Stores context information for Alluxio masters.

Constructor Summary

Constructors

Constructor and Description
MasterContext(JournalSystem journalSystem, SafeModeManager safeModeManager, BackupManager backupManager, long startTimeMs, int port) Creates a new master context.

Method Summary

Modifier and Type	Method and Description
BackupManager	getBackupManager()
JournalSystem	getJournalSystem()
int	getPort()
SafeModeManager	getSafeModeManager()
long	getStartTimeMs()
Lock	pauseStateLock()
Lock	stateChangeLock()

Methods inherited from class java.lang.Object

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

Constructor Detail

MasterContext

public MasterContext(JournalSystem journalSystem,
                     SafeModeManager safeModeManager,
                     BackupManager backupManager,
                     long startTimeMs,
                     int port)

Creates a new master context. The stateLock is used to allow us to pause master state changes so that we can take backups of master state. All state modifications should hold the read lock so that holding the write lock allows a thread to pause state modifications.

Parameters:

journalSystem - the journal system to use for tracking master operations

safeModeManager - the manager for master safe mode

backupManager - the backup manager for performing backups

startTimeMs - the master process start time in milliseconds

port - the rpc port

Method Detail

getJournalSystem

public JournalSystem getJournalSystem()

Returns:

the journal system to use for tracking master operations

getSafeModeManager

public SafeModeManager getSafeModeManager()

Returns:

the manager for master safe mode

getBackupManager

public BackupManager getBackupManager()

Returns:

the backup manager

stateChangeLock

public Lock stateChangeLock()

Returns:

the lock which must be held to modify master state

pauseStateLock

public Lock pauseStateLock()

Returns:

the lock which prevents master state from changing

getStartTimeMs

public long getStartTimeMs()

Returns:

the master process start time in milliseconds

getPort

public int getPort()

Returns:

the rpc port