Class ListenableFutureTask<V extends @Nullable Object>

    • Method Detail

      • create

        public static <V extends @Nullable ObjectListenableFutureTask<V> create​(Callable<V> callable)
        Creates a ListenableFutureTask that will upon running, execute the given Callable.
        callable - the callable task
      • create

        public static <V extends @Nullable ObjectListenableFutureTask<V> create​(Runnable runnable,
                                                                                  V result)
        Creates a ListenableFutureTask that will upon running, execute the given Runnable, and arrange that get will return the given result on successful completion.
        runnable - the runnable task
        result - the result to return on successful completion. If you don't need a particular result, consider using constructions of the form: ListenableFuture<?> f = ListenableFutureTask.create(runnable, null)
      • addListener

        public void addListener​(Runnable listener,
                                Executor exec)
        Description copied from interface: ListenableFuture
        Registers a listener to be run on the given executor. The listener will run when the Future's computation is complete or, if the computation is already complete, immediately.

        There is no guaranteed ordering of execution of listeners, but any listener added through this method is guaranteed to be called once the computation is complete.

        Exceptions thrown by a listener will be propagated up to the executor. Any exception thrown during Executor.execute (e.g., a RejectedExecutionException or an exception thrown by direct execution) will be caught and logged.

        Note: If your listener is lightweight -- and will not cause stack overflow by completing more futures or adding more directExecutor() listeners inline -- consider MoreExecutors.directExecutor(). Otherwise, avoid it: See the warnings on the docs for directExecutor.

        This is the most general listener interface. For common operations performed using listeners, see Futures. For a simplified but general listener interface, see addCallback().

        Memory consistency effects: Actions in a thread prior to adding a listener happen-before its execution begins, perhaps in another thread.

        Guava implementations of ListenableFuture promptly release references to listeners after executing them.

        Specified by:
        addListener in interface ListenableFuture<V extends @Nullable Object>
        listener - the listener to run when the computation is complete
        exec - the executor to run the listener in