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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.rendezvous;
17  
18  import io.netty.bootstrap.Bootstrap;
19  import io.netty.channel.ChannelFuture;
20  import io.netty.channel.ChannelInitializer;
21  import io.netty.channel.nio.NioEventLoopGroup;
22  import io.netty.channel.udt.UdtChannel;
23  import io.netty.channel.udt.nio.NioUdtProvider;
24  import io.netty.handler.logging.LogLevel;
25  import io.netty.handler.logging.LoggingHandler;
26  import io.netty.util.concurrent.DefaultThreadFactory;
27  
28  import java.net.InetSocketAddress;
29  import java.util.concurrent.ThreadFactory;
30  
31  /**
32   * UDT Message Flow Peer
33   * <p>
34   * Sends one message when a connection is open and echoes back any received data
35   * to the other peer.
36   */
37  public abstract class MsgEchoPeerBase {
38  
39      protected final int messageSize;
40      protected final InetSocketAddress self;
41      protected final InetSocketAddress peer;
42  
43      protected MsgEchoPeerBase(final InetSocketAddress self, final InetSocketAddress peer, final int messageSize) {
44          this.messageSize = messageSize;
45          this.self = self;
46          this.peer = peer;
47      }
48  
49      public void run() throws Exception {
50          // Configure the peer.
51          final ThreadFactory connectFactory = new DefaultThreadFactory("rendezvous");
52          final NioEventLoopGroup connectGroup = new NioEventLoopGroup(1,
53                  connectFactory, NioUdtProvider.MESSAGE_PROVIDER);
54          try {
55              final Bootstrap boot = new Bootstrap();
56              boot.group(connectGroup)
57                      .channelFactory(NioUdtProvider.MESSAGE_RENDEZVOUS)
58                      .handler(new ChannelInitializer<UdtChannel>() {
59                          @Override
60                          public void initChannel(final UdtChannel ch)
61                                  throws Exception {
62                              ch.pipeline().addLast(
63                                      new LoggingHandler(LogLevel.INFO),
64                                      new MsgEchoPeerHandler(messageSize));
65                          }
66                      });
67              // Start the peer.
68              final ChannelFuture f = boot.connect(peer, self).sync();
69              // Wait until the connection is closed.
70              f.channel().closeFuture().sync();
71          } finally {
72              // Shut down the event loop to terminate all threads.
73              connectGroup.shutdownGracefully();
74          }
75      }
76  }