ThreadPoolExecutor.DiscardPolicy
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A handler for rejected tasks that silently discards the
rejected task.
Public Constructor Summary
Inherited Method Summary
From class
java.lang.Object
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Object
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clone()
Creates and returns a copy of this Object.
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boolean
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equals( Object obj)
Compares this instance with the specified object and indicates if they
are equal.
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void
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finalize()
Invoked when the garbage collector has detected that this instance is no longer reachable.
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final
Class<?>
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getClass()
Returns the unique instance of Class that represents this
object's class.
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int
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hashCode()
Returns an integer hash code for this object.
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final
void
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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.
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final
void
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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.
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String
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toString()
Returns a string containing a concise, human-readable description of this
object.
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final
void
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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.
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final
void
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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.
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final
void
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wait()
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.
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Public Methods
Does nothing, which has the effect of discarding task r.
Parameters
| r |
the runnable task requested to be executed |
| e |
the executor attempting to execute this task
|
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Last updated 2024-07-10 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-07-10 UTC."],[[["\u003cp\u003e\u003ccode\u003eThreadPoolExecutor.DiscardPolicy\u003c/code\u003e is a handler for rejected tasks that silently discards them.\u003c/p\u003e\n"],["\u003cp\u003eIt implements the \u003ccode\u003eRejectedExecutionHandler\u003c/code\u003e interface and provides a \u003ccode\u003erejectedExecution\u003c/code\u003e method that takes no action when a task is rejected.\u003c/p\u003e\n"],["\u003cp\u003eWhen a task is submitted to a \u003ccode\u003eThreadPoolExecutor\u003c/code\u003e that is already at its capacity and cannot accept new tasks, the \u003ccode\u003eDiscardPolicy\u003c/code\u003e will simply drop the new task without any notification or exception.\u003c/p\u003e\n"],["\u003cp\u003eThis policy is suitable for scenarios where losing a few tasks is acceptable and the system can tolerate it without significant impact.\u003c/p\u003e\n"]]],["`ThreadPoolExecutor.DiscardPolicy` is a handler for rejected tasks. It implements `RejectedExecutionHandler` and provides a `DiscardPolicy` constructor to create an instance. The core function is `rejectedExecution(Runnable r, ThreadPoolExecutor e)`, which discards the rejected task `r` by doing nothing. This method is invoked when a `ThreadPoolExecutor` cannot accept a task. It effectively silently discards tasks without any further action.\n"],null,["public static class **ThreadPoolExecutor.DiscardPolicy** extends [Object](../../../../reference/java/lang/Object.html) \nimplements [RejectedExecutionHandler](../../../../reference/java/util/concurrent/RejectedExecutionHandler.html) \nA handler for rejected tasks that silently discards the\nrejected task. \n\nPublic Constructor Summary\n\n|---|------------------------------------------------------------------------------------------------------------------------------------------------|\n| | [DiscardPolicy](../../../../reference/java/util/concurrent/ThreadPoolExecutor.DiscardPolicy.html#DiscardPolicy())() Creates a `DiscardPolicy`. |\n\nPublic Method Summary\n\n|------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| void | [rejectedExecution](../../../../reference/java/util/concurrent/ThreadPoolExecutor.DiscardPolicy.html#rejectedExecution(java.lang.Runnable,%20java.util.concurrent.ThreadPoolExecutor))([Runnable](../../../../reference/java/lang/Runnable.html) r, [ThreadPoolExecutor](../../../../reference/java/util/concurrent/ThreadPoolExecutor.html) e) Does nothing, which has the effect of discarding task r. |\n\nInherited Method Summary \nFrom class [java.lang.Object](../../../../reference/java/lang/Object.html) \n\n|----------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [Object](../../../../reference/java/lang/Object.html) | [clone](../../../../reference/java/lang/Object.html#clone())() Creates and returns a copy of this `Object`. |\n| boolean | [equals](../../../../reference/java/lang/Object.html#equals(java.lang.Object))([Object](../../../../reference/java/lang/Object.html) obj) Compares this instance with the specified object and indicates if they are equal. |\n| void | [finalize](../../../../reference/java/lang/Object.html#finalize())() Invoked when the garbage collector has detected that this instance is no longer reachable. |\n| final [Class](../../../../reference/java/lang/Class.html)\\\u003c?\\\u003e | [getClass](../../../../reference/java/lang/Object.html#getClass())() Returns the unique instance of [Class](../../../../reference/java/lang/Class.html) that represents this object's class. |\n| int | [hashCode](../../../../reference/java/lang/Object.html#hashCode())() Returns an integer hash code for this object. |\n| final void | [notify](../../../../reference/java/lang/Object.html#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. |\n| final void | [notifyAll](../../../../reference/java/lang/Object.html#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. |\n| [String](../../../../reference/java/lang/String.html) | [toString](../../../../reference/java/lang/Object.html#toString())() Returns a string containing a concise, human-readable description of this object. |\n| final void | [wait](../../../../reference/java/lang/Object.html#wait(long,%20int))(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. |\n| final void | [wait](../../../../reference/java/lang/Object.html#wait(long))(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. |\n| final void | [wait](../../../../reference/java/lang/Object.html#wait())() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object. |\n\nFrom interface [java.util.concurrent.RejectedExecutionHandler](../../../../reference/java/util/concurrent/RejectedExecutionHandler.html) \n\n|---------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| abstract void | [rejectedExecution](../../../../reference/java/util/concurrent/RejectedExecutionHandler.html#rejectedExecution(java.lang.Runnable,%20java.util.concurrent.ThreadPoolExecutor))([Runnable](../../../../reference/java/lang/Runnable.html) r, [ThreadPoolExecutor](../../../../reference/java/util/concurrent/ThreadPoolExecutor.html) executor) Method that may be invoked by a [ThreadPoolExecutor](../../../../reference/java/util/concurrent/ThreadPoolExecutor.html) when [execute](../../../../reference/java/util/concurrent/ThreadPoolExecutor.html#execute(java.lang.Runnable)) cannot accept a task. |\n\nPublic Constructors \n\npublic\n**DiscardPolicy**\n() \nCreates a `DiscardPolicy`.\n\nPublic Methods \n\npublic void\n**rejectedExecution**\n([Runnable](../../../../reference/java/lang/Runnable.html) r, [ThreadPoolExecutor](../../../../reference/java/util/concurrent/ThreadPoolExecutor.html) e) \nDoes nothing, which has the effect of discarding task r. \n\nParameters\n\n| r | the runnable task requested to be executed |\n| e | the executor attempting to execute this task |\n|---|----------------------------------------------|"]]
