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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.sctp;
17  
18  import io.netty.bootstrap.Bootstrap;
19  import io.netty.channel.ChannelFuture;
20  import io.netty.channel.ChannelInitializer;
21  import io.netty.channel.EventLoopGroup;
22  import io.netty.channel.nio.NioEventLoopGroup;
23  import io.netty.channel.sctp.SctpChannel;
24  import io.netty.channel.sctp.SctpChannelOption;
25  import io.netty.channel.sctp.nio.NioSctpChannel;
26  
27  /**
28   * Sends one message when a connection is open and echoes back any received
29   * data to the server over SCTP connection.
30   *
31   * Simply put, the echo client initiates the ping-pong
32   * traffic between the echo client and server by sending the first message to
33   * the server.
34   */
35  public final class SctpEchoClient {
36  
37      static final String HOST = System.getProperty("host", "127.0.0.1");
38      static final int PORT = Integer.parseInt(System.getProperty("port", "8007"));
39      static final int SIZE = Integer.parseInt(System.getProperty("size", "256"));
40  
41      public static void main(String[] args) throws Exception {
42          // Configure the client.
43          EventLoopGroup group = new NioEventLoopGroup();
44          try {
45              Bootstrap b = new Bootstrap();
46              b.group(group)
47               .channel(NioSctpChannel.class)
48               .option(SctpChannelOption.SCTP_NODELAY, true)
49               .handler(new ChannelInitializer<SctpChannel>() {
50                   @Override
51                   public void initChannel(SctpChannel ch) throws Exception {
52                       ch.pipeline().addLast(
53                               //new LoggingHandler(LogLevel.INFO),
54                               new SctpEchoClientHandler());
55                   }
56               });
57  
58              // Start the client.
59              ChannelFuture f = b.connect(HOST, PORT).sync();
60  
61              // Wait until the connection is closed.
62              f.channel().closeFuture().sync();
63          } finally {
64              // Shut down the event loop to terminate all threads.
65              group.shutdownGracefully();
66          }
67      }
68  }