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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.netty.example.objectecho;
17  
18  import io.netty.bootstrap.Bootstrap;
19  import io.netty.channel.ChannelInitializer;
20  import io.netty.channel.ChannelPipeline;
21  import io.netty.channel.EventLoopGroup;
22  import io.netty.channel.nio.NioEventLoopGroup;
23  import io.netty.channel.socket.SocketChannel;
24  import io.netty.channel.socket.nio.NioSocketChannel;
25  import io.netty.example.echo.EchoClient;
26  import io.netty.handler.codec.serialization.ClassResolvers;
27  import io.netty.handler.codec.serialization.ObjectDecoder;
28  import io.netty.handler.codec.serialization.ObjectEncoder;
29  import io.netty.handler.ssl.SslContext;
30  import io.netty.handler.ssl.SslContextBuilder;
31  import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
32  
33  /**
34   * Modification of {@link EchoClient} which utilizes Java object serialization.
35   */
36  public final class ObjectEchoClient {
37  
38      static final boolean SSL = System.getProperty("ssl") != null;
39      static final String HOST = System.getProperty("host", "127.0.0.1");
40      static final int PORT = Integer.parseInt(System.getProperty("port", "8007"));
41      static final int SIZE = Integer.parseInt(System.getProperty("size", "256"));
42  
43      public static void main(String[] args) throws Exception {
44          // Configure SSL.
45          final SslContext sslCtx;
46          if (SSL) {
47              sslCtx = SslContextBuilder.forClient()
48                  .trustManager(InsecureTrustManagerFactory.INSTANCE).build();
49          } else {
50              sslCtx = null;
51          }
52  
53          EventLoopGroup group = new NioEventLoopGroup();
54          try {
55              Bootstrap b = new Bootstrap();
56              b.group(group)
57               .channel(NioSocketChannel.class)
58               .handler(new ChannelInitializer<SocketChannel>() {
59                  @Override
60                  public void initChannel(SocketChannel ch) throws Exception {
61                      ChannelPipeline p = ch.pipeline();
62                      if (sslCtx != null) {
63                          p.addLast(sslCtx.newHandler(ch.alloc(), HOST, PORT));
64                      }
65                      p.addLast(
66                              new ObjectEncoder(),
67                              new ObjectDecoder(ClassResolvers.cacheDisabled(null)),
68                              new ObjectEchoClientHandler());
69                  }
70               });
71  
72              // Start the connection attempt.
73              b.connect(HOST, PORT).sync().channel().closeFuture().sync();
74          } finally {
75              group.shutdownGracefully();
76          }
77      }
78  }