ThreadPoolExecutor.DiscardOldestPolicy Class

Definition

[Android.Runtime.Register("java/util/concurrent/ThreadPoolExecutor$DiscardOldestPolicy", DoNotGenerateAcw=true)]
public class ThreadPoolExecutor.DiscardOldestPolicy : Java.Lang.Object, IDisposable, Java.Interop.IJavaPeerable, Java.Util.Concurrent.IRejectedExecutionHandler

[<Android.Runtime.Register("java/util/concurrent/ThreadPoolExecutor$DiscardOldestPolicy", DoNotGenerateAcw=true)>]
type ThreadPoolExecutor.DiscardOldestPolicy = class
    inherit Object
    interface IRejectedExecutionHandler
    interface IJavaObject
    interface IDisposable
    interface IJavaPeerable

Inheritance

Object

Object

ThreadPoolExecutor.DiscardOldestPolicy

Attributes

RegisterAttribute

Implements

IJavaObject IJavaPeerable IRejectedExecutionHandler IDisposable

Remarks

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. This policy is rarely useful in cases where other threads may be waiting for tasks to terminate, or failures must be recorded. Instead consider using a handler of the form:

{@code
            new RejectedExecutionHandler() {
              public void rejectedExecution(Runnable r, ThreadPoolExecutor e) {
                Runnable dropped = e.getQueue().poll();
                if (dropped instanceof Future<?>) {
                  ((Future<?>)dropped).cancel(false);
                  // also consider logging the failure
                }
                e.execute(r);  // retry
            }}}

Java documentation for java.util.concurrent.ThreadPoolExecutor.DiscardOldestPolicy.

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Constructors

Properties

Methods

Explicit Interface Implementations

Extension Methods

Applies to