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

java.lang.Object
  org.apache.hadoop.service.AbstractService
      org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices

All Implemented Interfaces:

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

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

Nested Class Summary

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

org.apache.hadoop.service.Service.STATE

Field Summary

protected Map<String,org.apache.hadoop.yarn.server.api.AuxiliaryService>	serviceMap
protected Map<String,ByteBuffer>	serviceMetaData

Constructor Summary

AuxServices()

Method Summary

protected void	addService(String name, org.apache.hadoop.yarn.server.api.AuxiliaryService service)
Map<String,ByteBuffer>	getMetaData()
Map<String,ByteBuffer>	getMetaData(org.apache.hadoop.yarn.server.api.ContainerInitializationContext ctx)
void	handle(AuxServicesEvent event)
void	serviceInit(org.apache.hadoop.conf.Configuration conf)
void	serviceStart()
void	serviceStop()
void	stateChanged(org.apache.hadoop.service.Service service)

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, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop

Methods inherited from class java.lang.Object

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

Field Detail

serviceMap

protected final Map<String,org.apache.hadoop.yarn.server.api.AuxiliaryService> serviceMap

serviceMetaData

protected final Map<String,ByteBuffer> serviceMetaData

Constructor Detail

AuxServices

public AuxServices()

Method Detail

addService

protected final void addService(String name,
                                org.apache.hadoop.yarn.server.api.AuxiliaryService service)

getMetaData

public Map<String,ByteBuffer> getMetaData()

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.

getMetaData

public Map<String,ByteBuffer> getMetaData(org.apache.hadoop.yarn.server.api.ContainerInitializationContext ctx)

serviceInit

public void serviceInit(org.apache.hadoop.conf.Configuration conf)
                 throws Exception

Overrides:

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

Throws:

Exception

serviceStart

public void serviceStart()
                  throws Exception

Overrides:

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

Throws:

Exception

serviceStop

public void serviceStop()
                 throws Exception

Overrides:

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

Throws:

Exception

stateChanged

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

Specified by:

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

handle

public void handle(AuxServicesEvent event)

Specified by:

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