alluxio.master

Class NoopMaster

java.lang.Object

alluxio.master.NoopMaster

All Implemented Interfaces:

Checkpointed, Journaled, JournalEntryIterable, NoopJournaled, Master, Server<Boolean>

public class NoopMaster
extends Object
implements Master, NoopJournaled

Master implementation that does nothing. This is useful for testing and for situations where we don't want to run a real master, e.g. when formatting the journal.

Constructor Summary

Constructors

Constructor and Description
NoopMaster() Creates a new NoopMaster.
NoopMaster(String name) Creates a new NoopMaster with the given name.
NoopMaster(String name, UfsManager ufsManager) Creates a new NoopMaster with the given name and ufsManager.

Method Summary

Modifier and Type	Method and Description
void	close() Closes the server.
JournalContext	createJournalContext()
Set<Class<? extends Server>>	getDependencies()
MasterContext	getMasterContext()
String	getName()
Map<ServiceType,GrpcService>	getServices()
void	start(Boolean options) Starts the Alluxio server.
void	stop() Stops the Alluxio server.

Methods inherited from class java.lang.Object

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

Methods inherited from interface alluxio.master.journal.NoopJournaled

getCheckpointName, getJournalEntryIterator, processJournalEntry, resetState, restoreFromCheckpoint, writeToCheckpoint

Methods inherited from interface alluxio.master.journal.Journaled

applyAndJournal

Constructor Detail

NoopMaster

public NoopMaster()

Creates a new NoopMaster.

NoopMaster

public NoopMaster(String name)

Creates a new NoopMaster with the given name.

Parameters:

name - the master name

NoopMaster

public NoopMaster(String name,
                  UfsManager ufsManager)

Creates a new NoopMaster with the given name and ufsManager.

Parameters:

name - the master name

ufsManager - the UFS manager

Method Detail

getName

public String getName()

Specified by:

getName in interface Server<Boolean>

Returns:

the server's name

getDependencies

public Set<Class<? extends Server>> getDependencies()

Specified by:

getDependencies in interface Server<Boolean>

Returns:

the server dependencies

getServices

public Map<ServiceType,GrpcService> getServices()

Specified by:

getServices in interface Server<Boolean>

Returns:

a map from service names to gRPC serviced that serve RPCs for this server

start

public void start(Boolean options)

Description copied from interface: Server

Starts the Alluxio server.

Specified by:

start in interface Server<Boolean>

Parameters:

options - the start options

stop

public void stop()

Description copied from interface: Server

Stops the Alluxio server. Here, anything created or started in #start(T) should be cleaned up and shutdown.

Specified by:

stop in interface Server<Boolean>

close

public void close()

Description copied from interface: Server

Closes the server.

Specified by:

close in interface Server<Boolean>

createJournalContext

public JournalContext createJournalContext()

Specified by:

createJournalContext in interface Master

Returns:

a journal context for writing journal entries to the master

getMasterContext

public MasterContext getMasterContext()

Specified by:

getMasterContext in interface Master

Returns:

a master context