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   /*
    * Copyright 2012 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 org.jboss.netty.channel.socket;
  
  import org.jboss.netty.channel.Channel;
  import org.jboss.netty.channel.DefaultChannelFuture;
  
  public class ChannelRunnableWrapper extends DefaultChannelFuture implements Runnable {
  
      private final Runnable task;
      private boolean started;
  
      public ChannelRunnableWrapper(Channel channel, Runnable task) {
          super(channel, true);
          this.task = task;
      }
  
      public void run() {
          synchronized (this) {
              if (!isCancelled()) {
                  started = true;
              } else {
                  return;
              }
          }
          try {
              task.run();
              setSuccess();
          } catch (Throwable t) {
              setFailure(t);
          }
      }
  
      @Override
      public synchronized boolean cancel() {
          if (started) {
              return false;
          }
          return super.cancel();
      }
  }