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java.lang.Objectorg.restlet.service.Service
org.restlet.service.TaskService
public class TaskService
Service capable of running tasks asynchronously. The service instance
returned will not invoke the runnable task in the current thread.
In addition to allowing pooling, this method will ensure that the threads
executing the tasks will have the thread local variables copied from the
calling thread. This will ensure that call to static methods like
Application.getCurrent()
still work.
Also, note that this executor service will be shared among all Restlets and
Resources that are part of your context. In general this context corresponds
to a parent Application's context. If you want to have your own service
instance, you can use the wrap(ExecutorService)
method to ensure
that thread local variables are correctly set.
Constructor Summary | |
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TaskService()
Constructor. |
Method Summary | ||
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boolean |
awaitTermination(long timeout,
java.util.concurrent.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. |
|
protected java.util.concurrent.ExecutorService |
createExecutorService()
Creates a new JDK executor service that will be wrapped. |
|
protected java.util.concurrent.ThreadFactory |
createThreadFactory()
Creates a new thread factory that will properly name the Restlet created threads with a "restlet-" prefix. |
|
void |
execute(java.lang.Runnable command)
Executes the given command asynchronously. |
|
java.util.List |
invokeAll(java.util.Collection tasks)
Executes the given tasks, returning a list of Futures holding their status and results when all complete. |
|
java.util.List |
invokeAll(java.util.Collection tasks,
long timeout,
java.util.concurrent.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. |
|
java.lang.Object |
invokeAny(java.util.Collection tasks)
Executes the given tasks, returning the result of one that has completed successfully (i.e., without throwing an exception), if any do. |
|
java.lang.Object |
invokeAny(java.util.Collection tasks,
long timeout,
java.util.concurrent.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. |
|
boolean |
isShutdown()
Returns true if this executor has been shut down. |
|
boolean |
isShutdownAllowed()
Indicates if the shutdown() and shutdownNow() methods
are allowed to effectively shutdown the wrapped executor service. |
|
boolean |
isTerminated()
Returns true if all tasks have completed following shut down. |
|
void |
setShutdownAllowed(boolean allowShutdown)
Indicates if the shutdown() and shutdownNow() methods
are allowed to effectively shutdown the wrapped executor service. |
|
void |
shutdown()
Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted. |
|
java.util.List<java.lang.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 |
start()
Starts the Restlet. |
|
void |
stop()
Stops the Restlet. |
|
|
submit(java.util.concurrent.Callable<T> task)
Submits a value-returning task for execution and returns a Future representing the pending results of the task. |
|
java.util.concurrent.Future<?> |
submit(java.lang.Runnable task)
|
|
|
submit(java.lang.Runnable task,
T result)
|
|
static java.util.concurrent.ExecutorService |
wrap(java.util.concurrent.ExecutorService executorService)
Wraps a JDK executor service to ensure that the threads executing the tasks will have the thread local variables copied from the calling thread. |
Methods inherited from class org.restlet.service.Service |
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isEnabled, isStarted, isStopped, setEnabled |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public TaskService()
Method Detail |
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public static java.util.concurrent.ExecutorService wrap(java.util.concurrent.ExecutorService executorService)
Application.getCurrent()
still work.
executorService
- The JDK service to wrap.
public boolean awaitTermination(long timeout, java.util.concurrent.TimeUnit unit) throws java.lang.InterruptedException
awaitTermination
in interface java.util.concurrent.ExecutorService
timeout
- The maximum time to wait.unit
- The time unit.
java.lang.InterruptedException
protected java.util.concurrent.ExecutorService createExecutorService()
Executors.newCachedThreadPool(ThreadFactory)
, passing the
result of createThreadFactory()
as a parameter.
protected java.util.concurrent.ThreadFactory createThreadFactory()
public void execute(java.lang.Runnable command)
execute
in interface java.util.concurrent.Executor
command
- The command to execute.public java.util.List invokeAll(java.util.Collection tasks) throws java.lang.InterruptedException
ExecutorService
interface for typing details.
invokeAll
in interface java.util.concurrent.ExecutorService
tasks
- The task to execute.
java.lang.InterruptedException
public java.util.List invokeAll(java.util.Collection tasks, long timeout, java.util.concurrent.TimeUnit unit) throws java.lang.InterruptedException
ExecutorService
interface for typing details.
invokeAll
in interface java.util.concurrent.ExecutorService
tasks
- The task to execute.timeout
- The maximum time to wait.unit
- The time unit.
java.lang.InterruptedException
public java.lang.Object invokeAny(java.util.Collection tasks) throws java.lang.InterruptedException, java.util.concurrent.ExecutionException
ExecutorService
interface for typing details.
invokeAny
in interface java.util.concurrent.ExecutorService
tasks
- The task to execute.
java.lang.InterruptedException
java.util.concurrent.ExecutionException
public java.lang.Object invokeAny(java.util.Collection tasks, long timeout, java.util.concurrent.TimeUnit unit) throws java.lang.InterruptedException, java.util.concurrent.ExecutionException, java.util.concurrent.TimeoutException
ExecutorService
interface for typing details.
invokeAny
in interface java.util.concurrent.ExecutorService
tasks
- The task to execute.timeout
- The maximum time to wait.unit
- The time unit.
java.lang.InterruptedException
java.util.concurrent.ExecutionException
java.util.concurrent.TimeoutException
public boolean isShutdown()
isShutdown
in interface java.util.concurrent.ExecutorService
public boolean isShutdownAllowed()
shutdown()
and shutdownNow()
methods
are allowed to effectively shutdown the wrapped executor service. Return
false by default.
public boolean isTerminated()
isTerminated
in interface java.util.concurrent.ExecutorService
public void setShutdownAllowed(boolean allowShutdown)
shutdown()
and shutdownNow()
methods
are allowed to effectively shutdown the wrapped executor service.
allowShutdown
- True if shutdown is allowed.public void shutdown()
shutdown
in interface java.util.concurrent.ExecutorService
public java.util.List<java.lang.Runnable> shutdownNow()
shutdownNow
in interface java.util.concurrent.ExecutorService
public void start() throws java.lang.Exception
Service
start
in class Service
java.lang.Exception
public void stop() throws java.lang.Exception
Service
stop
in class Service
java.lang.Exception
public <T> java.util.concurrent.Future<T> submit(java.util.concurrent.Callable<T> task)
submit
in interface java.util.concurrent.ExecutorService
task
- The task to submit.
public java.util.concurrent.Future<?> submit(java.lang.Runnable task)
submit
in interface java.util.concurrent.ExecutorService
task
- The task to submit.
public <T> java.util.concurrent.Future<T> submit(java.lang.Runnable task, T result)
submit
in interface java.util.concurrent.ExecutorService
task
- The task to submit.result
- The result to return.
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