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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.discard;
17  
18  import io.netty.bootstrap.Bootstrap;
19  import io.netty.channel.ChannelFuture;
20  import io.netty.channel.ChannelInitializer;
21  import io.netty.channel.ChannelPipeline;
22  import io.netty.channel.EventLoopGroup;
23  import io.netty.channel.nio.NioEventLoopGroup;
24  import io.netty.channel.socket.SocketChannel;
25  import io.netty.channel.socket.nio.NioSocketChannel;
26  import io.netty.handler.ssl.SslContext;
27  import io.netty.handler.ssl.SslContextBuilder;
28  import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
29  
30  /**
31   * Keeps sending random data to the specified address.
32   */
33  public final class DiscardClient {
34  
35      static final boolean SSL = System.getProperty("ssl") != null;
36      static final String HOST = System.getProperty("host", "127.0.0.1");
37      static final int PORT = Integer.parseInt(System.getProperty("port", "8009"));
38      static final int SIZE = Integer.parseInt(System.getProperty("size", "256"));
39  
40      public static void main(String[] args) throws Exception {
41          // Configure SSL.
42          final SslContext sslCtx;
43          if (SSL) {
44              sslCtx = SslContextBuilder.forClient()
45                  .trustManager(InsecureTrustManagerFactory.INSTANCE).build();
46          } else {
47              sslCtx = null;
48          }
49  
50          EventLoopGroup group = new NioEventLoopGroup();
51          try {
52              Bootstrap b = new Bootstrap();
53              b.group(group)
54               .channel(NioSocketChannel.class)
55               .handler(new ChannelInitializer<SocketChannel>() {
56                   @Override
57                   protected void initChannel(SocketChannel ch) throws Exception {
58                       ChannelPipeline p = ch.pipeline();
59                       if (sslCtx != null) {
60                           p.addLast(sslCtx.newHandler(ch.alloc(), HOST, PORT));
61                       }
62                       p.addLast(new DiscardClientHandler());
63                   }
64               });
65  
66              // Make the connection attempt.
67              ChannelFuture f = b.connect(HOST, PORT).sync();
68  
69              // Wait until the connection is closed.
70              f.channel().closeFuture().sync();
71          } finally {
72              group.shutdownGracefully();
73          }
74      }
75  }