org.apache.hadoop.yarn.server.nodemanager.containermanager

Class AuxServices

java.lang.Object

org.apache.hadoop.yarn.service.AbstractService

org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices

All Implemented Interfaces:

org.apache.hadoop.yarn.event.EventHandler<AuxServicesEvent>, org.apache.hadoop.yarn.service.Service, org.apache.hadoop.yarn.service.ServiceStateChangeListener

public class AuxServices
extends org.apache.hadoop.yarn.service.AbstractService
implements org.apache.hadoop.yarn.service.ServiceStateChangeListener, org.apache.hadoop.yarn.event.EventHandler<AuxServicesEvent>

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	AuxServices.AuxiliaryService

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

org.apache.hadoop.yarn.service.Service.STATE

Field Summary

Fields

Modifier and Type	Field and Description
protected Map<String,AuxServices.AuxiliaryService>	serviceMap
protected Map<String,ByteBuffer>	serviceMeta

Constructor Summary

Constructors

Constructor and Description
AuxServices()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addService(String name, AuxServices.AuxiliaryService service)
Map<String,ByteBuffer>	getMeta()
void	handle(AuxServicesEvent event)
void	init(org.apache.hadoop.conf.Configuration conf)
void	start()
void	stateChanged(org.apache.hadoop.yarn.service.Service service)
void	stop()

Methods inherited from class org.apache.hadoop.yarn.service.AbstractService

getConfig, getName, getServiceState, getStartTime, register, unregister

Methods inherited from class java.lang.Object

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

Field Detail

serviceMap

protected final Map<String,AuxServices.AuxiliaryService> serviceMap

serviceMeta

protected final Map<String,ByteBuffer> serviceMeta

Constructor Detail

AuxServices

public AuxServices()

Method Detail

addService

protected final void addService(String name,
              AuxServices.AuxiliaryService service)

getMeta

public Map<String,ByteBuffer> getMeta()

Returns:

the meta data for all registered services, that have been started. If a service has not been started no metadata will be available. The key is the name of the service as defined in the configuration.

init

public void init(org.apache.hadoop.conf.Configuration conf)

Specified by:

init in interface org.apache.hadoop.yarn.service.Service

Overrides:

init in class org.apache.hadoop.yarn.service.AbstractService

start

public void start()

Specified by:

start in interface org.apache.hadoop.yarn.service.Service

Overrides:

start in class org.apache.hadoop.yarn.service.AbstractService

stop

public void stop()

Specified by:

stop in interface org.apache.hadoop.yarn.service.Service

Overrides:

stop in class org.apache.hadoop.yarn.service.AbstractService

stateChanged

public void stateChanged(org.apache.hadoop.yarn.service.Service service)

Specified by:

stateChanged in interface org.apache.hadoop.yarn.service.ServiceStateChangeListener

handle

public void handle(AuxServicesEvent event)

Specified by:

handle in interface org.apache.hadoop.yarn.event.EventHandler<AuxServicesEvent>