Package org.ros.concurrent

Class DefaultScheduledExecutorService

java.lang.Object

org.ros.concurrent.DefaultScheduledExecutorService

All Implemented Interfaces:

Executor, ExecutorService, ScheduledExecutorService

public class DefaultScheduledExecutorService
extends Object
implements ScheduledExecutorService

This wraps a Executors.newCachedThreadPool() and a Executors.newScheduledThreadPool(int) to provide the functionality of both in a single ScheduledExecutorService. This is necessary since the ScheduledExecutorService uses an unbounded queue which makes it impossible to create an unlimited number of threads on demand (as explained in the ThreadPoolExecutor class javadoc.

Author:

damonkohler@google.com (Damon Kohler)

Constructor Summary

Constructors

Constructor	Description
DefaultScheduledExecutorService()
DefaultScheduledExecutorService(ExecutorService executorService)	This instance will take over the lifecycle of the services.
DefaultScheduledExecutorService(ExecutorService executorService, ScheduledExecutorService scheduledExecutorService)	This instance will take over the lifecycle of the services.

Method Summary

Modifier and Type	Method	Description
boolean	awaitTermination(long timeout, TimeUnit unit)	First calls awaitTermination(long, TimeUnit) on the wrapped ExecutorService and then awaitTermination(long, TimeUnit) on the wrapped ScheduledExecutorService.
void	execute(Runnable command)
<T> List<Future<T>>	invokeAll(Collection<? extends Callable<T>> tasks)
<T> List<Future<T>>	invokeAll(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
<T> T	invokeAny(Collection<? extends Callable<T>> tasks)
<T> T	invokeAny(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
boolean	isShutdown()
boolean	isTerminated()
ScheduledFuture<?>	schedule(Runnable command, long delay, TimeUnit unit)
<V> ScheduledFuture<V>	schedule(Callable<V> callable, long delay, TimeUnit unit)
ScheduledFuture<?>	scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit)
ScheduledFuture<?>	scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit)
void	shutdown()
List<Runnable>	shutdownNow()
Future<?>	submit(Runnable task)
<T> Future<T>	submit(Runnable task, T result)
<T> Future<T>	submit(Callable<T> task)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DefaultScheduledExecutorService

public DefaultScheduledExecutorService()

DefaultScheduledExecutorService

public DefaultScheduledExecutorService(ExecutorService executorService)

This instance will take over the lifecycle of the services.

Parameters:

executorService -

DefaultScheduledExecutorService

public DefaultScheduledExecutorService(ExecutorService executorService,
 ScheduledExecutorService scheduledExecutorService)

This instance will take over the lifecycle of the services.

Parameters:

executorService -

scheduledExecutorService -

Method Details

shutdown

public void shutdown()

Specified by:

shutdown in interface ExecutorService

shutdownNow

public List<Runnable> shutdownNow()

Specified by:

shutdownNow in interface ExecutorService

isShutdown

public boolean isShutdown()

Specified by:

isShutdown in interface ExecutorService

isTerminated

public boolean isTerminated()

Specified by:

isTerminated in interface ExecutorService

awaitTermination

public boolean awaitTermination(long timeout,
 TimeUnit unit)
                         throws InterruptedException

First calls awaitTermination(long, TimeUnit) on the wrapped ExecutorService and then awaitTermination(long, TimeUnit) on the wrapped ScheduledExecutorService.

Specified by:

awaitTermination in interface ExecutorService

Returns:

true if both Executors terminated, false otherwise

Throws:

InterruptedException

submit

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

Specified by:

submit in interface ExecutorService

submit

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

Specified by:

submit in interface ExecutorService

submit

public Future<?> submit(Runnable task)

Specified by:

submit in interface ExecutorService

invokeAll

public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks)
                              throws InterruptedException

Specified by:

invokeAll in interface ExecutorService

Throws:

InterruptedException

invokeAll

public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks,
 long timeout,
 TimeUnit unit)
                              throws InterruptedException

Specified by:

invokeAll in interface ExecutorService

Throws:

InterruptedException

invokeAny

public <T> T invokeAny(Collection<? extends Callable<T>> tasks)
                throws InterruptedException,
ExecutionException

Specified by:

invokeAny in interface ExecutorService

Throws:

InterruptedException

ExecutionException

invokeAny

public <T> T invokeAny(Collection<? extends Callable<T>> tasks,
 long timeout,
 TimeUnit unit)
                throws InterruptedException,
ExecutionException,
TimeoutException

Specified by:

invokeAny in interface ExecutorService

Throws:

InterruptedException

ExecutionException

TimeoutException

execute

public void execute(Runnable command)

Specified by:

execute in interface Executor

schedule

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

Specified by:

schedule in interface ScheduledExecutorService

schedule

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

Specified by:

schedule in interface ScheduledExecutorService

scheduleAtFixedRate

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

Specified by:

scheduleAtFixedRate in interface ScheduledExecutorService

scheduleWithFixedDelay

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

Specified by:

scheduleWithFixedDelay in interface ScheduledExecutorService