Home How it Works Android APIMiner IDE Version More Info

to top

Summary: Ctors | Methods | Protected Methods | Inherited Methods | [Expand All]

Added in API level 1

public class

ScheduledThreadPoolExecutor

extends ThreadPoolExecutor
implements ScheduledExecutorService

java.lang.Object
↳	java.util.concurrent.AbstractExecutorService
	↳	java.util.concurrent.ThreadPoolExecutor
		↳	java.util.concurrent.ScheduledThreadPoolExecutor

Class Overview

A ThreadPoolExecutor that can additionally schedule commands to run after a given delay, or to execute periodically. This class is preferable to Timer when multiple worker threads are needed, or when the additional flexibility or capabilities of ThreadPoolExecutor (which this class extends) are required.

Delayed tasks execute no sooner than they are enabled, but without any real-time guarantees about when, after they are enabled, they will commence. Tasks scheduled for exactly the same execution time are enabled in first-in-first-out (FIFO) order of submission.

When a submitted task is cancelled before it is run, execution is suppressed. Such a cancelled task is not automatically removed from the work queue until its delay elapses. While this enables further inspection and monitoring, it may also cause unbounded retention of cancelled tasks.

Successive executions of a task scheduled via scheduleAtFixedRate or scheduleWithFixedDelay do not overlap. While different executions may be performed by different threads, the effects of prior executions happen-before those of subsequent ones.

While this class inherits from ThreadPoolExecutor, a few of the inherited tuning methods are not useful for it. In particular, because it acts as a fixed-sized pool using corePoolSize threads and an unbounded queue, adjustments to maximumPoolSize have no useful effect. Additionally, it is almost never a good idea to set corePoolSize to zero or use allowCoreThreadTimeOut because this may leave the pool without threads to handle tasks once they become eligible to run.

Extension notes: This class overrides the execute and submit methods to generate internal ScheduledFuture objects to control per-task delays and scheduling. To preserve functionality, any further overrides of these methods in subclasses must invoke superclass versions, which effectively disables additional task customization. However, this class provides alternative protected extension method decorateTask (one version each for Runnable and Callable) that can be used to customize the concrete task types used to execute commands entered via execute, submit, schedule, scheduleAtFixedRate, and scheduleWithFixedDelay. By default, a ScheduledThreadPoolExecutor uses a task type extending FutureTask. However, this may be modified or replaced using subclasses of the form:

 public class CustomScheduledExecutor extends ScheduledThreadPoolExecutor {

   static class CustomTask
        
          implements RunnableScheduledFuture
         
           { ... 
         
        

   protected 
       
         RunnableScheduledFuture
        
          decorateTask( Runnable r, RunnableScheduledFuture
         
           task) { return new CustomTask
          
           (r, task); } protected 
           
             RunnableScheduledFuture
            
              decorateTask( Callable
             
               c, RunnableScheduledFuture
              
                task) { return new CustomTask
               
                (c, task); } // ... add constructors, etc. }}

Summary

Public Constructors
	ScheduledThreadPoolExecutor(int corePoolSize) Creates a new `ScheduledThreadPoolExecutor` with the given core pool size.
	ScheduledThreadPoolExecutor(int corePoolSize, ThreadFactory threadFactory) Creates a new `ScheduledThreadPoolExecutor` with the given initial parameters.
	ScheduledThreadPoolExecutor(int corePoolSize, RejectedExecutionHandler handler) Creates a new ScheduledThreadPoolExecutor with the given initial parameters.
	ScheduledThreadPoolExecutor(int corePoolSize, ThreadFactory threadFactory, RejectedExecutionHandler handler) Creates a new ScheduledThreadPoolExecutor with the given initial parameters.

Public Methods
void	execute( Runnable command) Executes `command` with zero required delay.
boolean	getContinueExistingPeriodicTasksAfterShutdownPolicy() Gets the policy on whether to continue executing existing periodic tasks even when this executor has been `shutdown`.
boolean	getExecuteExistingDelayedTasksAfterShutdownPolicy() Gets the policy on whether to execute existing delayed tasks even when this executor has been `shutdown`.
BlockingQueue< Runnable>	getQueue() Returns the task queue used by this executor.
ScheduledFuture<?>	schedule( Runnable command, long delay, TimeUnit unit) Creates and executes a one-shot action that becomes enabled after the given delay.
<V> ScheduledFuture<V>	schedule( Callable<V> callable, long delay, TimeUnit unit) Creates and executes a ScheduledFuture that becomes enabled after the given delay.
ScheduledFuture<?>	scheduleAtFixedRate( Runnable command, long initialDelay, long period, TimeUnit unit) Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; that is executions will commence after `initialDelay` then `initialDelay+period`, then `initialDelay + 2 * period`, and so on.
ScheduledFuture<?>	scheduleWithFixedDelay( Runnable command, long initialDelay, long delay, TimeUnit unit) Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given delay between the termination of one execution and the commencement of the next.
void	setContinueExistingPeriodicTasksAfterShutdownPolicy(boolean value) Sets the policy on whether to continue executing existing periodic tasks even when this executor has been `shutdown`.
void	setExecuteExistingDelayedTasksAfterShutdownPolicy(boolean value) Sets the policy on whether to execute existing delayed tasks even when this executor has been `shutdown`.
void	shutdown() Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted.
List< Runnable>	shutdownNow() Attempts to stop all actively executing tasks, halts the processing of waiting tasks, and returns a list of the tasks that were awaiting execution.
<T> Future<T>	submit( Runnable task, T result) Submits a Runnable task for execution and returns a Future representing that task.
<T> Future<T>	submit( Callable<T> task) Submits a value-returning task for execution and returns a Future representing the pending results of the task.
Future<?>	submit( Runnable task) Submits a Runnable task for execution and returns a Future representing that task.

Protected Methods
<V> RunnableScheduledFuture<V>	decorateTask( Runnable runnable, RunnableScheduledFuture<V> task) Modifies or replaces the task used to execute a runnable.
<V> RunnableScheduledFuture<V>	decorateTask( Callable<V> callable, RunnableScheduledFuture<V> task) Modifies or replaces the task used to execute a callable.

[Expand]

Inherited Methods

From class java.util.concurrent.ThreadPoolExecutor

void	afterExecute( Runnable r, Throwable t) Method invoked upon completion of execution of the given Runnable.
void	allowCoreThreadTimeOut(boolean value) Sets the policy governing whether core threads may time out and terminate if no tasks arrive within the keep-alive time, being replaced if needed when new tasks arrive.
boolean	allowsCoreThreadTimeOut() Returns true if this pool allows core threads to time out and terminate if no tasks arrive within the keepAlive time, being replaced if needed when new tasks arrive.
boolean	awaitTermination(long timeout, TimeUnit unit)
void	beforeExecute( Thread t, Runnable r) Method invoked prior to executing the given Runnable in the given thread.
void	execute( Runnable command) Executes the given task sometime in the future.
void	finalize() Invokes `shutdown` when this executor is no longer referenced and it has no threads.
int	getActiveCount() Returns the approximate number of threads that are actively executing tasks.
long	getCompletedTaskCount() Returns the approximate total number of tasks that have completed execution.
int	getCorePoolSize() Returns the core number of threads.
long	getKeepAliveTime( TimeUnit unit) Returns the thread keep-alive time, which is the amount of time that threads in excess of the core pool size may remain idle before being terminated.
int	getLargestPoolSize() Returns the largest number of threads that have ever simultaneously been in the pool.
int	getMaximumPoolSize() Returns the maximum allowed number of threads.
int	getPoolSize() Returns the current number of threads in the pool.
BlockingQueue< Runnable>	getQueue() Returns the task queue used by this executor.
RejectedExecutionHandler	getRejectedExecutionHandler() Returns the current handler for unexecutable tasks.
long	getTaskCount() Returns the approximate total number of tasks that have ever been scheduled for execution.
ThreadFactory	getThreadFactory() Returns the thread factory used to create new threads.
boolean	isShutdown()
boolean	isTerminated()
boolean	isTerminating() Returns true if this executor is in the process of terminating after `shutdown()` or `shutdownNow()` but has not completely terminated.
int	prestartAllCoreThreads() Starts all core threads, causing them to idly wait for work.
boolean	prestartCoreThread() Starts a core thread, causing it to idly wait for work.
void	purge() Tries to remove from the work queue all `Future` tasks that have been cancelled.
boolean	remove( Runnable task) Removes this task from the executor's internal queue if it is present, thus causing it not to be run if it has not already started.
void	setCorePoolSize(int corePoolSize) Sets the core number of threads.
void	setKeepAliveTime(long time, TimeUnit unit) Sets the time limit for which threads may remain idle before being terminated.
void	setMaximumPoolSize(int maximumPoolSize) Sets the maximum allowed number of threads.
void	setRejectedExecutionHandler( RejectedExecutionHandler handler) Sets a new handler for unexecutable tasks.
void	setThreadFactory( ThreadFactory threadFactory) Sets the thread factory used to create new threads.
void	shutdown() Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted.
List< Runnable>	shutdownNow() Attempts to stop all actively executing tasks, halts the processing of waiting tasks, and returns a list of the tasks that were awaiting execution.
void	terminated() Method invoked when the Executor has terminated.
String	toString() Returns a string identifying this pool, as well as its state, including indications of run state and estimated worker and task counts.

From class java.util.concurrent.AbstractExecutorService

<T> List< Future<T>>	invokeAll( Collection<? extends Callable<T>> tasks) Executes the given tasks, returning a list of Futures holding their status and results when all complete.
<T> List< Future<T>>	invokeAll( Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit) Executes the given tasks, returning a list of Futures holding their status and results when all complete or the timeout expires, whichever happens first.
<T> T	invokeAny( Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit) Executes the given tasks, returning the result of one that has completed successfully (i.e., without throwing an exception), if any do before the given timeout elapses.
<T> T	invokeAny( Collection<? extends Callable<T>> tasks) Executes the given tasks, returning the result of one that has completed successfully (i.e., without throwing an exception), if any do.
<T> RunnableFuture<T>	newTaskFor( Callable<T> callable) Returns a `RunnableFuture` for the given callable task.
<T> RunnableFuture<T>	newTaskFor( Runnable runnable, T value) Returns a `RunnableFuture` for the given runnable and default value.
<T> Future<T>	submit( Runnable task, T result) Submits a Runnable task for execution and returns a Future representing that task.
<T> Future<T>	submit( Callable<T> task) Submits a value-returning task for execution and returns a Future representing the pending results of the task.
Future<?>	submit( Runnable task) Submits a Runnable task for execution and returns a Future representing that task.

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals( Object o) 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() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, 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 millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

From interface java.util.concurrent.Executor

From interface java.util.concurrent.ExecutorService

abstract boolean	awaitTermination(long timeout, TimeUnit unit) Blocks until all tasks have completed execution after a shutdown request, or the timeout occurs, or the current thread is interrupted, whichever happens first.
abstract <T> List< Future<T>>	invokeAll( Collection<? extends Callable<T>> tasks) Executes the given tasks, returning a list of Futures holding their status and results when all complete.
abstract <T> List< Future<T>>	invokeAll( Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit) Executes the given tasks, returning a list of Futures holding their status and results when all complete or the timeout expires, whichever happens first.
abstract <T> T	invokeAny( Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit) Executes the given tasks, returning the result of one that has completed successfully (i.e., without throwing an exception), if any do before the given timeout elapses.
abstract <T> T	invokeAny( Collection<? extends Callable<T>> tasks) Executes the given tasks, returning the result of one that has completed successfully (i.e., without throwing an exception), if any do.
abstract boolean	isShutdown() Returns `true` if this executor has been shut down.
abstract boolean	isTerminated() Returns `true` if all tasks have completed following shut down.
abstract void	shutdown() Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted.
abstract List< Runnable>	shutdownNow() Attempts to stop all actively executing tasks, halts the processing of waiting tasks, and returns a list of the tasks that were awaiting execution.
abstract <T> Future<T>	submit( Runnable task, T result) Submits a Runnable task for execution and returns a Future representing that task.
abstract <T> Future<T>	submit( Callable<T> task) Submits a value-returning task for execution and returns a Future representing the pending results of the task.
abstract Future<?>	submit( Runnable task) Submits a Runnable task for execution and returns a Future representing that task.

From interface java.util.concurrent.ScheduledExecutorService

abstract ScheduledFuture<?>	schedule( Runnable command, long delay, TimeUnit unit) Creates and executes a one-shot action that becomes enabled after the given delay.
abstract <V> ScheduledFuture<V>	schedule( Callable<V> callable, long delay, TimeUnit unit) Creates and executes a ScheduledFuture that becomes enabled after the given delay.
abstract ScheduledFuture<?>	scheduleAtFixedRate( Runnable command, long initialDelay, long period, TimeUnit unit) Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; that is executions will commence after `initialDelay` then `initialDelay+period`, then `initialDelay + 2 * period`, and so on.
abstract ScheduledFuture<?>	scheduleWithFixedDelay( Runnable command, long initialDelay, long delay, TimeUnit unit) Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given delay between the termination of one execution and the commencement of the next.

Public Constructors

public ScheduledThreadPoolExecutor (int corePoolSize)

Added in API level 1

Creates a new ScheduledThreadPoolExecutor with the given core pool size.

Parameters

corePoolSize	the number of threads to keep in the pool, even if they are idle, unless `allowCoreThreadTimeOut` is set

Throws

IllegalArgumentException	if `corePoolSize < 0`

public ScheduledThreadPoolExecutor (int corePoolSize, ThreadFactory threadFactory)

Added in API level 1

Creates a new ScheduledThreadPoolExecutor with the given initial parameters.

Parameters

corePoolSize	the number of threads to keep in the pool, even if they are idle, unless `allowCoreThreadTimeOut` is set
threadFactory	the factory to use when the executor creates a new thread

Throws

IllegalArgumentException	if `corePoolSize < 0`
NullPointerException	if `threadFactory` is null

public ScheduledThreadPoolExecutor (int corePoolSize, RejectedExecutionHandler handler)

Added in API level 1

Creates a new ScheduledThreadPoolExecutor with the given initial parameters.

Parameters

corePoolSize	the number of threads to keep in the pool, even if they are idle, unless `allowCoreThreadTimeOut` is set
handler	the handler to use when execution is blocked because the thread bounds and queue capacities are reached

Throws

IllegalArgumentException	if `corePoolSize < 0`
NullPointerException	if `handler` is null

public ScheduledThreadPoolExecutor (int corePoolSize, ThreadFactory threadFactory, RejectedExecutionHandler handler)

Added in API level 1

Creates a new ScheduledThreadPoolExecutor with the given initial parameters.

Parameters

corePoolSize	the number of threads to keep in the pool, even if they are idle, unless `allowCoreThreadTimeOut` is set
threadFactory	the factory to use when the executor creates a new thread
handler	the handler to use when execution is blocked because the thread bounds and queue capacities are reached

Throws

IllegalArgumentException	if `corePoolSize < 0`
NullPointerException	if `threadFactory` or `handler` is null

Public Methods

public void execute (Runnable command)

Added in API level 1

Executes command with zero required delay. This has effect equivalent to schedule(command, 0, anyUnit). Note that inspections of the queue and of the list returned by shutdownNow will access the zero-delayed ScheduledFuture, not the command itself.

A consequence of the use of ScheduledFuture objects is that afterExecute is always called with a null second Throwable argument, even if the command terminated abruptly. Instead, the Throwable thrown by such a task can be obtained via get().

Parameters

command	the task to execute

Throws

RejectedExecutionException	at discretion of `RejectedExecutionHandler`, if the task cannot be accepted for execution because the executor has been shut down
NullPointerException

public boolean getContinueExistingPeriodicTasksAfterShutdownPolicy ()

Added in API level 1

Gets the policy on whether to continue executing existing periodic tasks even when this executor has been shutdown. In this case, these tasks will only terminate upon shutdownNow or after setting the policy to false when already shutdown. This value is by default false.

Returns

true if will continue after shutdown

public boolean getExecuteExistingDelayedTasksAfterShutdownPolicy ()

Added in API level 1

Gets the policy on whether to execute existing delayed tasks even when this executor has been shutdown. In this case, these tasks will only terminate upon shutdownNow, or after setting the policy to false when already shutdown. This value is by default true.

Returns

true if will execute after shutdown

public BlockingQueue<Runnable> getQueue ()

Added in API level 1

Returns the task queue used by this executor. Each element of this queue is a ScheduledFuture, including those tasks submitted using execute which are for scheduling purposes used as the basis of a zero-delay ScheduledFuture. Iteration over this queue is not guaranteed to traverse tasks in the order in which they will execute.

Returns

the task queue

public ScheduledFuture<?> schedule (Runnable command, long delay, TimeUnit unit)

Added in API level 1

Creates and executes a one-shot action that becomes enabled after the given delay.

Parameters

command	the task to execute
delay	the time from now to delay execution
unit	the time unit of the delay parameter

Returns

a ScheduledFuture representing pending completion of the task and whose get() method will return null upon completion

Throws

RejectedExecutionException
NullPointerException

public ScheduledFuture<V> schedule (Callable<V> callable, long delay, TimeUnit unit)

Added in API level 1

Creates and executes a ScheduledFuture that becomes enabled after the given delay.

Parameters

callable	the function to execute
delay	the time from now to delay execution
unit	the time unit of the delay parameter

Returns

a ScheduledFuture that can be used to extract result or cancel

Throws

RejectedExecutionException
NullPointerException

public ScheduledFuture<?> scheduleAtFixedRate (Runnable command, long initialDelay, long period, TimeUnit unit)

Added in API level 1

Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; that is executions will commence after initialDelay then initialDelay+period, then initialDelay + 2 * period, and so on. If any execution of the task encounters an exception, subsequent executions are suppressed. Otherwise, the task will only terminate via cancellation or termination of the executor. If any execution of this task takes longer than its period, then subsequent executions may start late, but will not concurrently execute.

Parameters

command	the task to execute
initialDelay	the time to delay first execution
period	the period between successive executions
unit	the time unit of the initialDelay and period parameters

Returns

a ScheduledFuture representing pending completion of the task, and whose get() method will throw an exception upon cancellation

Throws

RejectedExecutionException
NullPointerException
IllegalArgumentException

public ScheduledFuture<?> scheduleWithFixedDelay (Runnable command, long initialDelay, long delay, TimeUnit unit)

Added in API level 1

Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given delay between the termination of one execution and the commencement of the next. If any execution of the task encounters an exception, subsequent executions are suppressed. Otherwise, the task will only terminate via cancellation or termination of the executor.

Parameters

command	the task to execute
initialDelay	the time to delay first execution
delay	the delay between the termination of one execution and the commencement of the next
unit	the time unit of the initialDelay and delay parameters

Returns

a ScheduledFuture representing pending completion of the task, and whose get() method will throw an exception upon cancellation

Throws

RejectedExecutionException
NullPointerException
IllegalArgumentException

public void setContinueExistingPeriodicTasksAfterShutdownPolicy (boolean value)

Added in API level 1

Sets the policy on whether to continue executing existing periodic tasks even when this executor has been shutdown. In this case, these tasks will only terminate upon shutdownNow or after setting the policy to false when already shutdown. This value is by default false.

Parameters

value	if `true`, continue after shutdown, else don't.

public void setExecuteExistingDelayedTasksAfterShutdownPolicy (boolean value)

Added in API level 1

Sets the policy on whether to execute existing delayed tasks even when this executor has been shutdown. In this case, these tasks will only terminate upon shutdownNow, or after setting the policy to false when already shutdown. This value is by default true.

Parameters

value	if `true`, execute after shutdown, else don't.

public void shutdown ()

Added in API level 1

Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted. Invocation has no additional effect if already shut down.

This method does not wait for previously submitted tasks to complete execution. Use awaitTermination to do that.

If the ExecuteExistingDelayedTasksAfterShutdownPolicy has been set false, existing delayed tasks whose delays have not yet elapsed are cancelled. And unless the ContinueExistingPeriodicTasksAfterShutdownPolicy has been set true, future executions of existing periodic tasks will be cancelled.

public List<Runnable> shutdownNow ()

Added in API level 1

Attempts to stop all actively executing tasks, halts the processing of waiting tasks, and returns a list of the tasks that were awaiting execution.

This method does not wait for actively executing tasks to terminate. Use awaitTermination to do that.

There are no guarantees beyond best-effort attempts to stop processing actively executing tasks. This implementation cancels tasks via interrupt(), so any task that fails to respond to interrupts may never terminate.

Returns

list of tasks that never commenced execution. Each element of this list is a ScheduledFuture, including those tasks submitted using execute, which are for scheduling purposes used as the basis of a zero-delay ScheduledFuture.

public Future<T> submit (Runnable task, T result)

Added in API level 1

Submits a Runnable task for execution and returns a Future representing that task. The Future's get method will return the given result upon successful completion.

Parameters

task	the task to submit
result	the result to return

Returns

a Future representing pending completion of the task

Throws

RejectedExecutionException
NullPointerException

public Future<T> submit (Callable<T> task)

Added in API level 1

Submits a value-returning task for execution and returns a Future representing the pending results of the task. The Future's get method will return the task's result upon successful completion.

If you would like to immediately block waiting for a task, you can use constructions of the form result = exec.submit(aCallable).get();

Note: The Executors class includes a set of methods that can convert some other common closure-like objects, for example, PrivilegedAction to Callable form so they can be submitted.

Parameters

task	the task to submit

Returns

a Future representing pending completion of the task

Throws

RejectedExecutionException
NullPointerException

public Future<?> submit (Runnable task)

Added in API level 1

Submits a Runnable task for execution and returns a Future representing that task. The Future's get method will return null upon successful completion.

Parameters

task	the task to submit

Returns

a Future representing pending completion of the task

Throws

RejectedExecutionException
NullPointerException

Protected Methods

protected RunnableScheduledFuture<V> decorateTask (Runnable runnable, RunnableScheduledFuture<V> task)

Added in API level 9

Modifies or replaces the task used to execute a runnable. This method can be used to override the concrete class used for managing internal tasks. The default implementation simply returns the given task.

Parameters

runnable	the submitted Runnable
task	the task created to execute the runnable

Returns

a task that can execute the runnable

protected RunnableScheduledFuture<V> decorateTask (Callable<V> callable, RunnableScheduledFuture<V> task)

Added in API level 9

Modifies or replaces the task used to execute a callable. This method can be used to override the concrete class used for managing internal tasks. The default implementation simply returns the given task.

Parameters

callable	the submitted Callable
task	the task created to execute the callable

Returns

a task that can execute the callable

information

No examples for this method.

Frequently called with: [Clear]

This example was provided by APIMiner.

Portions of this page are reproduced from work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License. The original page is available here.

Results

Interfaces

Classes

Enums

Exceptions

ScheduledThreadPoolExecutor

Class Overview

Summary

Public Constructors

public ScheduledThreadPoolExecutor (int corePoolSize)

Parameters

Throws

public ScheduledThreadPoolExecutor (int corePoolSize, ThreadFactory threadFactory)

Parameters

Throws

public ScheduledThreadPoolExecutor (int corePoolSize, RejectedExecutionHandler handler)

Parameters

Throws

public ScheduledThreadPoolExecutor (int corePoolSize, ThreadFactory threadFactory, RejectedExecutionHandler handler)

Parameters

Throws

Public Methods

public void execute (Runnable command)

Parameters

Throws

public boolean getContinueExistingPeriodicTasksAfterShutdownPolicy ()

Returns

See Also

public boolean getExecuteExistingDelayedTasksAfterShutdownPolicy ()

Returns

See Also

public BlockingQueue<Runnable> getQueue ()

Returns

public ScheduledFuture<?> schedule (Runnable command, long delay, TimeUnit unit)

Parameters

Returns

Throws

public ScheduledFuture<V> schedule (Callable<V> callable, long delay, TimeUnit unit)

Parameters

Returns

Throws

public ScheduledFuture<?> scheduleAtFixedRate (Runnable command, long initialDelay, long period, TimeUnit unit)

Parameters

Returns

Throws

public ScheduledFuture<?> scheduleWithFixedDelay (Runnable command, long initialDelay, long delay, TimeUnit unit)

Parameters

Returns

Throws

public void setContinueExistingPeriodicTasksAfterShutdownPolicy (boolean value)

Parameters

See Also

public void setExecuteExistingDelayedTasksAfterShutdownPolicy (boolean value)

Parameters

See Also

public void shutdown ()

public List<Runnable> shutdownNow ()

Returns

public Future<T> submit (Runnable task, T result)

Parameters

Returns

Throws

public Future<T> submit (Callable<T> task)

Parameters

Returns

Throws

public Future<?> submit (Runnable task)

Parameters

Returns

Throws

Protected Methods

protected RunnableScheduledFuture<V> decorateTask (Runnable runnable, RunnableScheduledFuture<V> task)

Parameters

Returns

protected RunnableScheduledFuture<V> decorateTask (Callable<V> callable, RunnableScheduledFuture<V> task)

Parameters

Returns