AbstractExecutorService

public abstract class AbstractExecutorService extends Object
implements ExecutorService
Known Direct Subclasses
Known Indirect Subclasses

Provides default implementations of ExecutorService execution methods. This class implements the submit, invokeAny and invokeAll methods using a RunnableFuture returned by newTaskFor, which defaults to the FutureTask class provided in this package. For example, the implementation of submit(Runnable) creates an associated RunnableFuture that is executed and returned. Subclasses may override the newTaskFor methods to return RunnableFuture implementations other than FutureTask.

Extension example. Here is a sketch of a class that customizes ThreadPoolExecutor to use a CustomTask class instead of the default FutureTask:

 public class CustomThreadPoolExecutor extends ThreadPoolExecutor {

   static class CustomTask<V> implements RunnableFuture<V> {...}

   protected <V> RunnableFuture<V> newTaskFor(Callable<V> c) {
       return new CustomTask<V>(c);
   }
   protected <V> RunnableFuture<V> newTaskFor(Runnable r, V v) {
       return new CustomTask<V>(r, v);
   }
   // ... add constructors, etc.
 }

Public Constructor Summary

Public Method Summary

<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)
Executes the given tasks, returning the result of one that has completed successfully (i.e., without throwing an exception), if any do.
<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> Future<T>
submit(Callable<T> task)
Submits a value-returning task for execution and returns a Future representing the pending results of the task.
<T> Future<T>
submit(Runnable task, T result)
Submits a Runnable task for execution and returns a Future representing that task.
Future<?>
submit(Runnable task)
Submits a Runnable task for execution and returns a Future representing that task.

Protected Method Summary

<T> RunnableFuture<T>
newTaskFor(Runnable runnable, T value)
Returns a RunnableFuture for the given runnable and default value.
<T> RunnableFuture<T>
newTaskFor(Callable<T> callable)
Returns a RunnableFuture for the given callable task.

Inherited Method Summary