Class 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.

Constructors

Constructor Description
DiscardOldestPolicy()

Creates a DiscardOldestPolicy for the given executor.

Methods

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

Constructors

DiscardOldestPolicy

public DiscardOldestPolicy()

Creates a DiscardOldestPolicy for the given executor.

Methods

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

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https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/ThreadPoolExecutor.DiscardOldestPolicy.html