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   /*
    * Copyright 2013 The Netty Project
    *
    * The Netty Project licenses this file to you under the Apache License,
    * version 2.0 (the "License"); you may not use this file except in compliance
    * with the License. You may obtain a copy of the License at:
    *
    *   http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations
   * under the License.
   */
  package io.netty.util.concurrent;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.List;
  import java.util.concurrent.Callable;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  
  /**
   * Abstract base class for {@link EventExecutorGroup} implementations.
   */
  public abstract class AbstractEventExecutorGroup implements EventExecutorGroup {
  
      @Override
      public Future<?> submit(Runnable task) {
          return next().submit(task);
      }
  
      @Override
      public <T> Future<T> submit(Runnable task, T result) {
          return next().submit(task, result);
      }
  
      @Override
      public <T> Future<T> submit(Callable<T> task) {
          return next().submit(task);
      }
  
      @Override
      public ScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit) {
          return next().schedule(command, delay, unit);
      }
  
      @Override
      public <V> ScheduledFuture<V> schedule(Callable<V> callable, long delay, TimeUnit unit) {
          return next().schedule(callable, delay, unit);
      }
  
      @Override
      public ScheduledFuture<?> scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit) {
          return next().scheduleAtFixedRate(command, initialDelay, period, unit);
      }
  
      @Override
      public ScheduledFuture<?> scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit) {
          return next().scheduleWithFixedDelay(command, initialDelay, delay, unit);
      }
  
      @Override
      public Future<?> shutdownGracefully() {
          return shutdownGracefully(2, 15, TimeUnit.SECONDS);
      }
  
      /**
       * @deprecated {@link #shutdownGracefully(long, long, TimeUnit)} or {@link #shutdownGracefully()} instead.
       */
      @Override
      @Deprecated
      public abstract void shutdown();
  
      /**
       * @deprecated {@link #shutdownGracefully(long, long, TimeUnit)} or {@link #shutdownGracefully()} instead.
       */
      @Override
      @Deprecated
      public List<Runnable> shutdownNow() {
          shutdown();
          return Collections.emptyList();
      }
  
      @Override
      public <T> List<java.util.concurrent.Future<T>> invokeAll(Collection<? extends Callable<T>> tasks)
              throws InterruptedException {
          return next().invokeAll(tasks);
      }
  
      @Override
      public <T> List<java.util.concurrent.Future<T>> invokeAll(
              Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit) throws InterruptedException {
          return next().invokeAll(tasks, timeout, unit);
      }
 
     @Override
     public <T> T invokeAny(Collection<? extends Callable<T>> tasks) throws InterruptedException, ExecutionException {
         return next().invokeAny(tasks);
     }
 
     @Override
     public <T> T invokeAny(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
             throws InterruptedException, ExecutionException, TimeoutException {
         return next().invokeAny(tasks, timeout, unit);
     }
 
     @Override
     public void execute(Runnable command) {
         next().execute(command);
     }
 }