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16 package io.netty.example.echo;
17
18 import io.netty.bootstrap.ServerBootstrap;
19 import io.netty.channel.ChannelFuture;
20 import io.netty.channel.ChannelInitializer;
21 import io.netty.channel.ChannelOption;
22 import io.netty.channel.ChannelPipeline;
23 import io.netty.channel.EventLoopGroup;
24 import io.netty.channel.MultiThreadIoEventLoopGroup;
25 import io.netty.channel.nio.NioIoHandler;
26 import io.netty.channel.socket.SocketChannel;
27 import io.netty.channel.socket.nio.NioServerSocketChannel;
28 import io.netty.example.util.ServerUtil;
29 import io.netty.handler.logging.LogLevel;
30 import io.netty.handler.logging.LoggingHandler;
31 import io.netty.handler.ssl.SslContext;
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36 public final class EchoServer {
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38 static final int PORT = Integer.parseInt(System.getProperty("port", "8007"));
39
40 public static void main(String[] args) throws Exception {
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42 final SslContext sslCtx = ServerUtil.buildSslContext();
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45 EventLoopGroup group = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());
46 final EchoServerHandler serverHandler = new EchoServerHandler();
47 try {
48 ServerBootstrap b = new ServerBootstrap();
49 b.group(group)
50 .channel(NioServerSocketChannel.class)
51 .option(ChannelOption.SO_BACKLOG, 100)
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 }
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61 p.addLast(serverHandler);
62 }
63 });
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66 ChannelFuture f = b.bind(PORT).sync();
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69 f.channel().closeFuture().sync();
70 } finally {
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72 group.shutdownGracefully();
73 }
74 }
75 }