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