Module java.base

Package java.util.concurrent

Class ThreadPoolExecutor.DiscardOldestPolicy

java.lang.Object

java.util.concurrent.ThreadPoolExecutor.DiscardOldestPolicy

All Implemented Interfaces:

RejectedExecutionHandler

Enclosing class:

ThreadPoolExecutor

public static class ThreadPoolExecutor.DiscardOldestPolicy
extends Object
implements RejectedExecutionHandler

A handler for rejected tasks that discards the oldest unhandled request and then retries execute, unless the executor is shut down, in which case the task is discarded.

Constructor Summary

Constructors

Constructor	Description
DiscardOldestPolicy()	Creates a DiscardOldestPolicy for the given executor.

Method Summary

Modifier and Type	Method	Description
void	rejectedExecution(Runnable r, ThreadPoolExecutor e)	Obtains and ignores the next task that the executor would otherwise execute, if one is immediately available, and then retries execution of task r, unless the executor is shut down, in which case task r is instead discarded.

Methods declared in class java.lang.Object

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

Constructor Details

DiscardOldestPolicy

public DiscardOldestPolicy()

Creates a DiscardOldestPolicy for the given executor.

Method Details

rejectedExecution

public void rejectedExecution(Runnable r,
 ThreadPoolExecutor e)

Obtains and ignores the next task that the executor would otherwise execute, if one is immediately available, and then retries execution of task r, unless the executor is shut down, in which case task r is instead discarded.

Specified by:

rejectedExecution in interface RejectedExecutionHandler

Parameters:

r - the runnable task requested to be executed

e - the executor attempting to execute this task