ExecutorService

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edu.emory.mathcs.util.concurrent
Interface ExecutorService

All Superinterfaces:: Executor

public interface ExecutorService
extends Executor

An executor that provides methods to manage termination. An ExecutorService can be shut down, which will cause it to stop accepting new tasks. After being shut down, the executor will eventually terminate, at which point no tasks are actively executing, no tasks are awaiting execution, and no new tasks can be submitted.

The Executors class provides factory methods for the executor services provided in edu.emory.mathcs.util.concurrent.

Since:: 1.5

Method Summary

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.

boolean isShutdown()
          Returns true if this executor has been shut down.

boolean isTerminated()
          Returns true if all tasks have completed following shut down.

void shutdown()
          Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted.

java.util.List 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.

Methods inherited from interface edu.emory.mathcs.util.concurrent.Executor

execute

Method Detail

shutdown

public void shutdown()

Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted.

shutdownNow

public java.util.List 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.

There are no guarantees beyond best-effort attempts to stop processing actively executing tasks. For example, typical implementations will cancel via Thread.interrupt()>Thread.interrupt() 55 , so if any tasks mask or fail to respond to interrupts, they may never terminate.

isShutdown

public boolean isShutdown()

Returns true if this executor has been shut down.

isTerminated

public boolean isTerminated()

Returns true if all tasks have completed following shut down. Note that isTerminated is never true unless either shutdown or shutdownNow was called first.

awaitTermination

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

Blocks until all tasks have completed execution after a shutdown request, or the timeout occurs, or the current thread is interrupted, whichever happens first.