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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.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.example.util.ServerUtil;
27  import io.netty.handler.codec.serialization.ClassResolvers;
28  import io.netty.handler.codec.serialization.ObjectDecoder;
29  import io.netty.handler.codec.serialization.ObjectEncoder;
30  import io.netty.handler.logging.LogLevel;
31  import io.netty.handler.logging.LoggingHandler;
32  import io.netty.handler.ssl.SslContext;
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 = ServerUtil.buildSslContext();
45  
46          EventLoopGroup bossGroup = new NioEventLoopGroup(1);
47          EventLoopGroup workerGroup = new NioEventLoopGroup();
48          try {
49              ServerBootstrap b = new ServerBootstrap();
50              b.group(bossGroup, workerGroup)
51               .channel(NioServerSocketChannel.class)
52               .handler(new LoggingHandler(LogLevel.INFO))
53               .childHandler(new ChannelInitializer<SocketChannel>() {
54                  @Override
55                  public void initChannel(SocketChannel ch) throws Exception {
56                      ChannelPipeline p = ch.pipeline();
57                      if (sslCtx != null) {
58                          p.addLast(sslCtx.newHandler(ch.alloc()));
59                      }
60                      p.addLast(
61                              new ObjectEncoder(),
62                              new ObjectDecoder(ClassResolvers.cacheDisabled(null)),
63                              new ObjectEchoServerHandler());
64                  }
65               });
66  
67              // Bind and start to accept incoming connections.
68              b.bind(PORT).sync().channel().closeFuture().sync();
69          } finally {
70              bossGroup.shutdownGracefully();
71              workerGroup.shutdownGracefully();
72          }
73      }
74  }