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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.example.udt.echo.message;
17  
18  import io.netty.bootstrap.ServerBootstrap;
19  import io.netty.channel.ChannelFuture;
20  import io.netty.channel.ChannelInitializer;
21  import io.netty.channel.ChannelOption;
22  import io.netty.channel.nio.NioEventLoopGroup;
23  import io.netty.channel.udt.UdtChannel;
24  import io.netty.channel.udt.nio.NioUdtProvider;
25  import io.netty.handler.logging.LogLevel;
26  import io.netty.handler.logging.LoggingHandler;
27  import io.netty.util.concurrent.DefaultThreadFactory;
28  
29  import java.util.concurrent.ThreadFactory;
30  
31  /**
32   * UDT Message Flow Server
33   * <p>
34   * Echoes back any received data from a client.
35   */
36  public final class MsgEchoServer {
37  
38      static final int PORT = Integer.parseInt(System.getProperty("port", "8007"));
39  
40      public static void main(String[] args) throws Exception {
41          final ThreadFactory acceptFactory = new DefaultThreadFactory("accept");
42          final ThreadFactory connectFactory = new DefaultThreadFactory("connect");
43          final NioEventLoopGroup acceptGroup =
44                  new NioEventLoopGroup(1, acceptFactory, NioUdtProvider.MESSAGE_PROVIDER);
45          final NioEventLoopGroup connectGroup =
46                  new NioEventLoopGroup(1, connectFactory, NioUdtProvider.MESSAGE_PROVIDER);
47  
48          // Configure the server.
49          try {
50              final ServerBootstrap boot = new ServerBootstrap();
51              boot.group(acceptGroup, connectGroup)
52                      .channelFactory(NioUdtProvider.MESSAGE_ACCEPTOR)
53                      .option(ChannelOption.SO_BACKLOG, 10)
54                      .handler(new LoggingHandler(LogLevel.INFO))
55                      .childHandler(new ChannelInitializer<UdtChannel>() {
56                          @Override
57                          public void initChannel(final UdtChannel ch)
58                                  throws Exception {
59                              ch.pipeline().addLast(
60                                      new LoggingHandler(LogLevel.INFO),
61                                      new MsgEchoServerHandler());
62                          }
63                      });
64              // Start the server.
65              final ChannelFuture future = boot.bind(PORT).sync();
66              // Wait until the server socket is closed.
67              future.channel().closeFuture().sync();
68          } finally {
69              // Shut down all event loops to terminate all threads.
70              acceptGroup.shutdownGracefully();
71              connectGroup.shutdownGracefully();
72          }
73      }
74  }