Class ForwardingExecutorService

    • Method Detail

      • delegate

        protected abstract ExecutorService delegate()
        Description copied from class: ForwardingObject
        Returns the backing delegate instance that methods are forwarded to. Abstract subclasses generally override this method with an abstract method that has a more specific return type, such as ForwardingSet.delegate(). Concrete subclasses override this method to supply the instance being decorated.
        Specified by:
        delegate in class ForwardingObject
      • invokeAll

        public <T extends @Nullable ObjectList<Future<T>> invokeAll​(Collection<? extends Callable<T>> tasks)
                                                               throws InterruptedException
        Description copied from interface: java.util.concurrent.ExecutorService
        Executes the given tasks, returning a list of Futures holding their status and results when all complete. Future.isDone() is true for each element of the returned list. Note that a completed task could have terminated either normally or by throwing an exception. The results of this method are undefined if the given collection is modified while this operation is in progress.
        Specified by:
        invokeAll in interface ExecutorService
        Type Parameters:
        T - the type of the values returned from the tasks
        Parameters:
        tasks - the collection of tasks
        Returns:
        a list of Futures representing the tasks, in the same sequential order as produced by the iterator for the given task list, each of which has completed
        Throws:
        InterruptedException - if interrupted while waiting, in which case unfinished tasks are cancelled
      • invokeAll

        public <T extends @Nullable ObjectList<Future<T>> invokeAll​(Collection<? extends Callable<T>> tasks,
                                                                      long timeout,
                                                                      TimeUnit unit)
                                                               throws InterruptedException
        Description copied from interface: java.util.concurrent.ExecutorService
        Executes the given tasks, returning a list of Futures holding their status and results when all complete or the timeout expires, whichever happens first. Future.isDone() is true for each element of the returned list. Upon return, tasks that have not completed are cancelled. Note that a completed task could have terminated either normally or by throwing an exception. The results of this method are undefined if the given collection is modified while this operation is in progress.
        Specified by:
        invokeAll in interface ExecutorService
        Type Parameters:
        T - the type of the values returned from the tasks
        Parameters:
        tasks - the collection of tasks
        timeout - the maximum time to wait
        unit - the time unit of the timeout argument
        Returns:
        a list of Futures representing the tasks, in the same sequential order as produced by the iterator for the given task list. If the operation did not time out, each task will have completed. If it did time out, some of these tasks will not have completed.
        Throws:
        InterruptedException - if interrupted while waiting, in which case unfinished tasks are cancelled
      • invokeAny

        public <T extends @Nullable Object> T invokeAny​(Collection<? extends Callable<T>> tasks,
                                                        long timeout,
                                                        TimeUnit unit)
                                                 throws InterruptedException,
                                                        ExecutionException,
                                                        TimeoutException
        Description copied from interface: java.util.concurrent.ExecutorService
        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. Upon normal or exceptional return, tasks that have not completed are cancelled. The results of this method are undefined if the given collection is modified while this operation is in progress.
        Specified by:
        invokeAny in interface ExecutorService
        Type Parameters:
        T - the type of the values returned from the tasks
        Parameters:
        tasks - the collection of tasks
        timeout - the maximum time to wait
        unit - the time unit of the timeout argument
        Returns:
        the result returned by one of the tasks
        Throws:
        InterruptedException - if interrupted while waiting
        ExecutionException - if no task successfully completes
        TimeoutException - if the given timeout elapses before any task successfully completes
      • isTerminated

        public boolean isTerminated()
        Description copied from interface: java.util.concurrent.ExecutorService
        Returns true if all tasks have completed following shut down. Note that isTerminated is never true unless either shutdown or shutdownNow was called first.
        Specified by:
        isTerminated in interface ExecutorService
        Returns:
        true if all tasks have completed following shut down
      • shutdown

        public void shutdown()
        Description copied from interface: java.util.concurrent.ExecutorService
        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.

        Specified by:
        shutdown in interface ExecutorService
      • shutdownNow

        @CanIgnoreReturnValue
        public List<RunnableshutdownNow()
        Description copied from interface: java.util.concurrent.ExecutorService
        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. For example, typical implementations will cancel via Thread.interrupt(), so any task that fails to respond to interrupts may never terminate.

        Specified by:
        shutdownNow in interface ExecutorService
        Returns:
        list of tasks that never commenced execution
      • execute

        public void execute​(Runnable command)
        Description copied from interface: java.util.concurrent.Executor
        Executes the given command at some time in the future. The command may execute in a new thread, in a pooled thread, or in the calling thread, at the discretion of the Executor implementation.
        Specified by:
        execute in interface Executor
        Parameters:
        command - the runnable task
      • submit

        public <T extends @Nullable ObjectFuture<T> submit​(Callable<T> task)
        Description copied from interface: java.util.concurrent.ExecutorService
        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.

        Specified by:
        submit in interface ExecutorService
        Type Parameters:
        T - the type of the task's result
        Parameters:
        task - the task to submit
        Returns:
        a Future representing pending completion of the task
      • submit

        public Future<?> submit​(Runnable task)
        Description copied from interface: java.util.concurrent.ExecutorService
        Submits a Runnable task for execution and returns a Future representing that task. The Future's get method will return null upon successful completion.
        Specified by:
        submit in interface ExecutorService
        Parameters:
        task - the task to submit
        Returns:
        a Future representing pending completion of the task
      • submit

        public <T extends @Nullable ObjectFuture<T> submit​(Runnable task,
                                                             T result)
        Description copied from interface: java.util.concurrent.ExecutorService
        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.
        Specified by:
        submit in interface ExecutorService
        Type Parameters:
        T - the type of the result
        Parameters:
        task - the task to submit
        result - the result to return
        Returns:
        a Future representing pending completion of the task