alluxio.master

Class MasterContext

java.lang.Object

alluxio.master.MasterContext

Direct Known Subclasses:

CoreMasterContext

public class MasterContext
extends Object

Stores context information for Alluxio masters.

Constructor Summary

Constructors

Constructor and Description
MasterContext(JournalSystem journalSystem) Creates a new master context, using the global server UserState.
MasterContext(JournalSystem journalSystem, UserState userState) Creates a new master context.

Method Summary

Modifier and Type	Method and Description
JournalSystem	getJournalSystem()
UserState	getUserState()
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)

Creates a new master context, using the global server UserState.

Parameters:

journalSystem - the journal system to use for tracking master operations

MasterContext

public MasterContext(JournalSystem journalSystem,
                     UserState userState)

Creates a new master context.

Parameters:

journalSystem - the journal system to use for tracking master operations

userState - the user state of the server. If null, will use the global server user state

Method Detail

getJournalSystem

public JournalSystem getJournalSystem()

Returns:

the journal system to use for tracking master operations

getUserState

public UserState getUserState()

Returns:

the UserState of the server

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