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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    *   https://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.netty5.example.discard;
17  
18  import io.netty5.bootstrap.Bootstrap;
19  import io.netty5.channel.Channel;
20  import io.netty5.channel.ChannelInitializer;
21  import io.netty5.channel.ChannelPipeline;
22  import io.netty5.channel.EventLoopGroup;
23  import io.netty5.channel.MultithreadEventLoopGroup;
24  import io.netty5.channel.nio.NioHandler;
25  import io.netty5.channel.socket.SocketChannel;
26  import io.netty5.channel.socket.nio.NioSocketChannel;
27  import io.netty5.handler.ssl.SslContext;
28  import io.netty5.handler.ssl.SslContextBuilder;
29  import io.netty5.handler.ssl.util.InsecureTrustManagerFactory;
30  
31  /**
32   * Keeps sending random data to the specified address.
33   */
34  public final class DiscardClient {
35  
36      static final boolean SSL = System.getProperty("ssl") != null;
37      static final String HOST = System.getProperty("host", "127.0.0.1");
38      static final int PORT = Integer.parseInt(System.getProperty("port", "8009"));
39      static final int SIZE = Integer.parseInt(System.getProperty("size", "256"));
40  
41      public static void main(String[] args) throws Exception {
42          // Configure SSL.
43          final SslContext sslCtx;
44          if (SSL) {
45              sslCtx = SslContextBuilder.forClient()
46                  .trustManager(InsecureTrustManagerFactory.INSTANCE).build();
47          } else {
48              sslCtx = null;
49          }
50  
51          EventLoopGroup group = new MultithreadEventLoopGroup(NioHandler.newFactory());
52          try {
53              Bootstrap b = new Bootstrap();
54              b.group(group)
55               .channel(NioSocketChannel.class)
56               .handler(new ChannelInitializer<SocketChannel>() {
57                   @Override
58                   protected void initChannel(SocketChannel ch) throws Exception {
59                       ChannelPipeline p = ch.pipeline();
60                       if (sslCtx != null) {
61                           p.addLast(sslCtx.newHandler(ch.bufferAllocator(), HOST, PORT));
62                       }
63                       p.addLast(new DiscardClientHandler());
64                   }
65               });
66  
67              // Make the connection attempt.
68              Channel channel = b.connect(HOST, PORT).asStage().get();
69  
70              // Wait until the connection is closed.
71              channel.closeFuture().asStage().sync();
72          } finally {
73              group.shutdownGracefully();
74          }
75      }
76  }