Package org.apache.hadoop.yarn.server.resourcemanager

Class CuratorBasedElectorService

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.hadoop.yarn.server.resourcemanager.CuratorBasedElectorService

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, org.apache.curator.framework.recipes.leader.LeaderLatchListener, org.apache.hadoop.service.Service, EmbeddedElector

@Private
@Unstable
public class CuratorBasedElectorService
extends org.apache.hadoop.service.AbstractService
implements EmbeddedElector, org.apache.curator.framework.recipes.leader.LeaderLatchListener

Leader election implementation that uses Curator.

Nested Class Summary

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

org.apache.hadoop.service.Service.STATE

Field Summary

Fields

Modifier and Type	Field	Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
CuratorBasedElectorService(ResourceManager rm)

Method Summary

Modifier and Type	Method	Description
org.apache.curator.framework.CuratorFramework	getCuratorClient()
java.lang.String	getZookeeperConnectionState()	Get information about the elector's connection to Zookeeper.
void	isLeader()
void	notLeader()
void	rejoinElection()	Leave and rejoin leader election.
protected void	serviceInit(org.apache.hadoop.conf.Configuration conf)
protected void	serviceStop()

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

Methods inherited from interface org.apache.hadoop.service.Service

close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, registerServiceListener, start, stop, unregisterServiceListener, waitForServiceToStop

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

CuratorBasedElectorService

public CuratorBasedElectorService(ResourceManager rm)

Method Detail

serviceInit

protected void serviceInit(org.apache.hadoop.conf.Configuration conf)
                    throws java.lang.Exception

Overrides:

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

Throws:

java.lang.Exception

serviceStop

protected void serviceStop()
                    throws java.lang.Exception

Overrides:

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

Throws:

java.lang.Exception

rejoinElection

public void rejoinElection()

Description copied from interface: EmbeddedElector

Leave and rejoin leader election.

Specified by:

rejoinElection in interface EmbeddedElector

getZookeeperConnectionState

public java.lang.String getZookeeperConnectionState()

Description copied from interface: EmbeddedElector

Get information about the elector's connection to Zookeeper.

Specified by:

getZookeeperConnectionState in interface EmbeddedElector

Returns:

zookeeper connection state

isLeader

public void isLeader()

Specified by:

isLeader in interface org.apache.curator.framework.recipes.leader.LeaderLatchListener

notLeader

public void notLeader()

Specified by:

notLeader in interface org.apache.curator.framework.recipes.leader.LeaderLatchListener

getCuratorClient

@VisibleForTesting
public org.apache.curator.framework.CuratorFramework getCuratorClient()