org.apache.hadoop.yarn.server.resourcemanager.monitor

Class SchedulingMonitor

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.hadoop.yarn.server.resourcemanager.monitor.SchedulingMonitor

All Implemented Interfaces:

Closeable, AutoCloseable, Service

public class SchedulingMonitor
extends AbstractService

Nested Class Summary

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

Service.STATE

Constructor Summary

Constructors

Constructor and Description
SchedulingMonitor(SchedulingEditPolicy scheduleEditPolicy)

Method Summary

Methods

Modifier and Type	Method and Description
long	getMonitorInterval()
void	invokePolicy()
void	serviceInit(Configuration conf) All initialization code needed by a service.
void	serviceStart() Actions called during the INITED to STARTED transition.
void	serviceStop() Actions called during the transition to the STOPPED state.

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

Constructor Detail

SchedulingMonitor

public SchedulingMonitor(SchedulingEditPolicy scheduleEditPolicy)

Method Detail

getMonitorInterval

public long getMonitorInterval()

serviceInit

public void serviceInit(Configuration conf)
                 throws Exception

Description copied from class: AbstractService

All initialization code needed by a service. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.init(Configuration) prevents re-entrancy. The base implementation checks to see if the subclass has created a new configuration instance, and if so, updates the base class value

Overrides:

serviceInit in class AbstractService

Parameters:

conf - configuration

Throws:

Exception - on a failure -these will be caught, possibly wrapped, and wil; trigger a service stop

serviceStart

public void serviceStart()
                  throws Exception

Description copied from class: AbstractService

Actions called during the INITED to STARTED transition. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.start() prevents re-entrancy.

Overrides:

serviceStart in class AbstractService

Throws:

Exception - if needed -these will be caught, wrapped, and trigger a service stop

serviceStop

public void serviceStop()
                 throws Exception

Description copied from class: AbstractService

Actions called during the transition to the STOPPED state. This method will only ever be called once during the lifecycle of a specific service instance. Implementations do not need to be synchronized as the logic in AbstractService.stop() prevents re-entrancy. Implementations MUST write this to be robust against failures, including checks for null references -and for the first failure to not stop other attempts to shut down parts of the service.

Overrides:

serviceStop in class AbstractService

Throws:

Exception - if needed -these will be caught and logged.

invokePolicy

public void invokePolicy()