com.google.common.util.concurrent

## Class ForwardingListeningExecutorService

- java.lang.Object
- - com.google.common.collect.ForwardingObject
  - - com.google.common.util.concurrent.ForwardingExecutorService
    - - com.google.common.util.concurrent.ForwardingListeningExecutorService

- All Implemented Interfaces:
    ListeningExecutorService, java.util.concurrent.Executor, java.util.concurrent.ExecutorService

      public abstract class ForwardingListeningExecutorService
      extends ForwardingExecutorService
      implements ListeningExecutorService

  A listening executor service which forwards all its method calls to another listening executor service. Subclasses should override one or more methods to modify the behavior of the backing executor service as desired per the decorator pattern.
  Since:
    10.0

- - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `ForwardingListeningExecutorService()` Constructor for use by subclasses.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected abstract ListeningExecutorService` | `delegate()` Returns the backing delegate instance that methods are forwarded to.
    `<T> ListenableFuture<T>` | `submit(java.util.concurrent.Callable<T> task)`
    `ListenableFuture<?>` | `submit(java.lang.Runnable task)`
    `<T> ListenableFuture<T>` | `submit(java.lang.Runnable task, T result)`

    - ### Methods inherited from class com.google.common.util.concurrent.ForwardingExecutorService

      `awaitTermination, execute, invokeAll, invokeAll, invokeAny, invokeAny, isShutdown, isTerminated, shutdown, shutdownNow`

    - ### Methods inherited from class com.google.common.collect.ForwardingObject

      `toString`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface com.google.common.util.concurrent.ListeningExecutorService

      `invokeAll, invokeAll`

    - ### Methods inherited from interface java.util.concurrent.ExecutorService

      `awaitTermination, invokeAny, invokeAny, isShutdown, isTerminated, shutdown, shutdownNow`

    - ### Methods inherited from interface java.util.concurrent.Executor

      `execute`

- - ### Constructor Detail

    - #### ForwardingListeningExecutorService

          protected ForwardingListeningExecutorService()

      Constructor for use by subclasses.

  - ### Method Detail

    - #### delegate

          protected abstract ListeningExecutorService 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 `ForwardingExecutorService`

    - #### submit

          public <T> ListenableFuture<T> submit(java.util.concurrent.Callable<T> task)

      Specified by:
        `submit` in interface `ListeningExecutorService`
      Specified by:
        `submit` in interface `java.util.concurrent.ExecutorService`
      Overrides:
        `submit` in class `ForwardingExecutorService`
      Returns:
        a `ListenableFuture` representing pending completion of the task

    - #### submit

          public ListenableFuture<?> submit(java.lang.Runnable task)

      Specified by:
        `submit` in interface `ListeningExecutorService`
      Specified by:
        `submit` in interface `java.util.concurrent.ExecutorService`
      Overrides:
        `submit` in class `ForwardingExecutorService`
      Returns:
        a `ListenableFuture` representing pending completion of the task

    - #### submit

          public <T> ListenableFuture<T> submit(java.lang.Runnable task,
                                       T result)

      Specified by:
        `submit` in interface `ListeningExecutorService`
      Specified by:
        `submit` in interface `java.util.concurrent.ExecutorService`
      Overrides:
        `submit` in class `ForwardingExecutorService`
      Returns:
        a `ListenableFuture` representing pending completion of the task