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.threadFactory, true);
30 this.parent = parent;
31 }
32
33 @Override
34 public ChannelFuture register(Channel channel, ChannelPromise promise) {
35 return super.register(channel, 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 @Override
48 protected void run() {
49 for (;;) {
50 Runnable task = takeTask();
51 if (task != null) {
52 task.run();
53 updateLastExecutionTime();
54 }
55
56 Channel ch = this.ch;
57 if (isShuttingDown()) {
58 if (ch != null) {
59 ch.unsafe().close(ch.unsafe().voidPromise());
60 }
61 if (confirmShutdown()) {
62 break;
63 }
64 } else {
65 if (ch != null) {
66 // Handle deregistration
67 if (!ch.isRegistered()) {
68 runAllTasks();
69 deregister();
70 }
71 }
72 }
73 }
74 }
75
76 protected void deregister() {
77 ch = null;
78 parent.activeChildren.remove(this);
79 parent.idleChildren.add(this);
80 }
81 }