View Javadoc
1   /*
2    * Copyright 2012 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package org.jboss.netty.channel.socket;
17  
18  import org.jboss.netty.channel.Channel;
19  import org.jboss.netty.channel.DefaultChannelFuture;
20  
21  public class ChannelRunnableWrapper extends DefaultChannelFuture implements Runnable {
22  
23      private final Runnable task;
24      private boolean started;
25  
26      public ChannelRunnableWrapper(Channel channel, Runnable task) {
27          super(channel, true);
28          this.task = task;
29      }
30  
31      public void run() {
32          synchronized (this) {
33              if (!isCancelled()) {
34                  started = true;
35              } else {
36                  return;
37              }
38          }
39          try {
40              task.run();
41              setSuccess();
42          } catch (Throwable t) {
43              setFailure(t);
44          }
45      }
46  
47      @Override
48      public synchronized boolean cancel() {
49          if (started) {
50              return false;
51          }
52          return super.cancel();
53      }
54  }