ThreadPoolExecutor.DiscardPolicy

AI-generated Key Takeaways

ThreadPoolExecutor.DiscardPolicy is a handler for rejected tasks that silently discards them.
It implements the RejectedExecutionHandler interface and provides a rejectedExecution method that takes no action when a task is rejected.
When a task is submitted to a ThreadPoolExecutor that is already at its capacity and cannot accept new tasks, the DiscardPolicy will simply drop the new task without any notification or exception.
This policy is suitable for scenarios where losing a few tasks is acceptable and the system can tolerate it without significant impact.

public static class ThreadPoolExecutor.DiscardPolicy extends Object
implements RejectedExecutionHandler

A handler for rejected tasks that silently discards the rejected task.

DiscardPolicy()

Creates a DiscardPolicy.

void	rejectedExecution(Runnable r, ThreadPoolExecutor e) Does nothing, which has the effect of discarding task r.

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.

From interface java.util.concurrent.RejectedExecutionHandler

abstract void

rejectedExecution(Runnable r, ThreadPoolExecutor executor)

Method that may be invoked by a ThreadPoolExecutor when execute cannot accept a task.

Creates a DiscardPolicy.

Does nothing, which has the effect of discarding task r.

r	the runnable task requested to be executed
e	the executor attempting to execute this task