Package org.elasticsearch.common.util.concurrent

Class AbstractLifecycleRunnable

java.lang.Object

org.elasticsearch.common.util.concurrent.AbstractRunnable

org.elasticsearch.common.util.concurrent.AbstractLifecycleRunnable

All Implemented Interfaces:

Runnable

public abstract class AbstractLifecycleRunnable
extends AbstractRunnable

AbstractLifecycleRunnable is a service-lifecycle aware AbstractRunnable.

This simplifies the running and rescheduling of Lifecycle-based Runnables.

Constructor Summary

Constructors

Constructor	Description
AbstractLifecycleRunnable(Lifecycle lifecycle, org.apache.logging.log4j.Logger logger)	AbstractLifecycleRunnable must be aware of the actual lifecycle to react properly.

Method Summary

Modifier and Type	Method	Description
protected void	doRun()	This method has the same semantics as Runnable.run()
protected abstract void	doRunInLifecycle()	Perform runnable logic, but only if the lifecycle is not stopped or closed.
void	onAfter()	This method is called in a finally block after successful execution or on a rejection.
protected void	onAfterInLifecycle()	This method is invoked in the finally block of the run method, but it is only executed if the lifecycle is not stopped or closed.

Methods inherited from class org.elasticsearch.common.util.concurrent.AbstractRunnable

isForceExecution, onFailure, onRejection, run

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractLifecycleRunnable

public AbstractLifecycleRunnable(Lifecycle lifecycle,
                                 org.apache.logging.log4j.Logger logger)

AbstractLifecycleRunnable must be aware of the actual lifecycle to react properly.

Parameters:

lifecycle - The lifecycle to react too

logger - The logger to use when logging

Throws:

NullPointerException - if any parameter is null

Method Detail

doRun

protected final void doRun()
                    throws Exception

This method has the same semantics as Runnable.run()

This invokes doRunInLifecycle() only if the lifecycle is not stopped or closed. Otherwise it exits immediately.

Specified by:

doRun in class AbstractRunnable

Throws:

InterruptedException - if the run method throws an InterruptedException

Exception

doRunInLifecycle

protected abstract void doRunInLifecycle()
                                  throws Exception

Perform runnable logic, but only if the lifecycle is not stopped or closed.

Throws:

InterruptedException - if the run method throws an InterruptedException

Exception

onAfter

public final void onAfter()

This method is called in a finally block after successful execution or on a rejection.

This overrides the default behavior of onAfter to add the caveat that it only runs if the lifecycle is not stopped or closed.

Note: this does not guarantee that it won't be stopped concurrently as it invokes onAfterInLifecycle(), but it's a solid attempt at preventing it. For those that use this for rescheduling purposes, the next invocation would be effectively cancelled immediately if that's the case.

Overrides:

onAfter in class AbstractRunnable

See Also:

onAfterInLifecycle()

onAfterInLifecycle

protected void onAfterInLifecycle()

This method is invoked in the finally block of the run method, but it is only executed if the lifecycle is not stopped or closed.

This method is most useful for rescheduling the next iteration of the current runnable.