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 io.netty.channel;
17  
18  /**
19   * {@link SingleThreadEventLoop} which is used to handle OIO {@link Channel}'s. So in general there will be
20   * one {@link ThreadPerChannelEventLoop} per {@link Channel}.
21   *
22   */
23  public class ThreadPerChannelEventLoop extends SingleThreadEventLoop {
24  
25      private final ThreadPerChannelEventLoopGroup parent;
26      private Channel ch;
27  
28      public ThreadPerChannelEventLoop(ThreadPerChannelEventLoopGroup parent) {
29          super(parent, parent.executor, true);
30          this.parent = parent;
31      }
32  
33      @Override
34      public ChannelFuture register(ChannelPromise promise) {
35          return super.register(promise).addListener(new ChannelFutureListener() {
36              @Override
37              public void operationComplete(ChannelFuture future) throws Exception {
38                  if (future.isSuccess()) {
39                      ch = future.channel();
40                  } else {
41                      deregister();
42                  }
43              }
44          });
45      }
46  
47      @Deprecated
48      @Override
49      public ChannelFuture register(Channel channel, ChannelPromise promise) {
50          return super.register(channel, promise).addListener(new ChannelFutureListener() {
51              @Override
52              public void operationComplete(ChannelFuture future) throws Exception {
53                  if (future.isSuccess()) {
54                      ch = future.channel();
55                  } else {
56                      deregister();
57                  }
58              }
59          });
60      }
61  
62      @Override
63      protected void run() {
64          for (;;) {
65              Runnable task = takeTask();
66              if (task != null) {
67                  task.run();
68                  updateLastExecutionTime();
69              }
70  
71              Channel ch = this.ch;
72              if (isShuttingDown()) {
73                  if (ch != null) {
74                      ch.unsafe().close(ch.unsafe().voidPromise());
75                  }
76                  if (confirmShutdown()) {
77                      break;
78                  }
79              } else {
80                  if (ch != null) {
81                      // Handle deregistration
82                      if (!ch.isRegistered()) {
83                          runAllTasks();
84                          deregister();
85                      }
86                  }
87              }
88          }
89      }
90  
91      protected void deregister() {
92          ch = null;
93          parent.activeChildren.remove(this);
94          parent.idleChildren.add(this);
95      }
96  }