org.apache.slider.server.services.workflow

Class ClosingService<C extends Closeable>

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.slider.server.services.workflow.ClosingService<C>

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.hadoop.service.Service

Direct Known Subclasses:

AgentService

public class ClosingService<C extends Closeable>
extends org.apache.hadoop.service.AbstractService

Service that closes the closeable supplied during shutdown, if not null. As the Service interface itself extends Closeable, this service can be used to shut down other services if desired.

Nested Class Summary

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

org.apache.hadoop.service.Service.STATE

Constructor Summary

Constructors

Constructor and Description
ClosingService(C closeable) Construct an instance of the service, using the default name
ClosingService(String name)
ClosingService(String name, C closeable) Construct an instance of the service

Method Summary

Methods

Modifier and Type	Method and Description
C	getCloseable() Get the closeable
protected void	serviceStop() Stop routine will close the closeable -if not null - and set the reference to null afterwards This operation does raise any exception on the close, though it does record it
void	setCloseable(C closeable) Set or update the closeable.

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, serviceInit, 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

Constructor Detail

ClosingService

public ClosingService(String name)

ClosingService

public ClosingService(String name,
              C closeable)

Construct an instance of the service

Parameters:

name - service name

closeable - closeable to close (may be null)

ClosingService

public ClosingService(C closeable)

Construct an instance of the service, using the default name

Parameters:

closeable - closeable to close (may be null)

Method Detail

getCloseable

public C getCloseable()

Get the closeable

Returns:

the closeable

setCloseable

public void setCloseable(C closeable)

Set or update the closeable.

Parameters:

closeable -

serviceStop

protected void serviceStop()

Stop routine will close the closeable -if not null - and set the reference to null afterwards This operation does raise any exception on the close, though it does record it

Overrides:

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