Module org.elasticsearch.server

Package org.elasticsearch.common.util.concurrent

Class RunOnce

java.lang.Object

org.elasticsearch.common.util.concurrent.RunOnce

All Implemented Interfaces:

Runnable

public class RunOnce
extends Object
implements Runnable

Runnable that prevents running its delegate more than once.

Crucially, this drops the reference to the provided delegate as soon as it executes, allowing it and its dependencies to be GCd even though the small RunOnce wrapper might remain reachable in a collection of pending-execution callbacks somewhere.

Constructor Summary

Constructors

Constructor	Description
RunOnce(Runnable delegate)

Method Summary

Modifier and Type	Method	Description
boolean	hasRun()	true if the RunOnce has been executed once.
void	run()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

RunOnce

public RunOnce(Runnable delegate)

Method Details

run

public void run()

Specified by:

run in interface Runnable

hasRun

public boolean hasRun()

true if the RunOnce has been executed once.

toString

public String toString()

Overrides:

toString in class Object