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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.objectecho;
17  
18  import io.netty.bootstrap.ServerBootstrap;
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.NioServerSocketChannel;
25  import io.netty.example.echo.EchoServer;
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.logging.LogLevel;
30  import io.netty.handler.logging.LoggingHandler;
31  import io.netty.handler.ssl.SslContext;
32  import io.netty.handler.ssl.util.SelfSignedCertificate;
33  
34  /**
35   * Modification of {@link EchoServer} which utilizes Java object serialization.
36   */
37  public final class ObjectEchoServer {
38  
39      static final boolean SSL = System.getProperty("ssl") != null;
40      static final int PORT = Integer.parseInt(System.getProperty("port", "8007"));
41  
42      public static void main(String[] args) throws Exception {
43          // Configure SSL.
44          final SslContext sslCtx;
45          if (SSL) {
46              SelfSignedCertificate ssc = new SelfSignedCertificate();
47              sslCtx = SslContext.newServerContext(ssc.certificate(), ssc.privateKey());
48          } else {
49              sslCtx = null;
50          }
51  
52          EventLoopGroup bossGroup = new NioEventLoopGroup(1);
53          EventLoopGroup workerGroup = new NioEventLoopGroup();
54          try {
55              ServerBootstrap b = new ServerBootstrap();
56              b.group(bossGroup, workerGroup)
57               .channel(NioServerSocketChannel.class)
58               .handler(new LoggingHandler(LogLevel.INFO))
59               .childHandler(new ChannelInitializer<SocketChannel>() {
60                  @Override
61                  public void initChannel(SocketChannel ch) throws Exception {
62                      ChannelPipeline p = ch.pipeline();
63                      if (sslCtx != null) {
64                          p.addLast(sslCtx.newHandler(ch.alloc()));
65                      }
66                      p.addLast(
67                              new ObjectEncoder(),
68                              new ObjectDecoder(ClassResolvers.cacheDisabled(null)),
69                              new ObjectEchoServerHandler());
70                  }
71               });
72  
73              // Bind and start to accept incoming connections.
74              b.bind(PORT).sync().channel().closeFuture().sync();
75          } finally {
76              bossGroup.shutdownGracefully();
77              workerGroup.shutdownGracefully();
78          }
79      }
80  }