nettyechoserverdemo.EchoServer.java Source code

Introduction

Here is the source code for nettyechoserverdemo.EchoServer.java

Source

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package nettyechoserverdemo;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.FixedLengthFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;

/**
 *
 * @author allen
 */
public class EchoServer {

    public EchoServer() {
    } //EchoServer()

    public void bind(int port) throws InterruptedException {
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();

        try {
            ServerBootstrap bootstrap = new ServerBootstrap();

            bootstrap.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG, 100).handler(new LoggingHandler(LogLevel.INFO))
                    .childHandler(new ChannelInitializer<SocketChannel>() {

                        @Override
                        protected void initChannel(SocketChannel c) throws Exception {
                            ByteBuf delimiter = Unpooled.copiedBuffer("$_".getBytes());

                            c.pipeline().addLast(new DelimiterBasedFrameDecoder(1024, delimiter));
                            //c.pipeline().addLast(new FixedLengthFrameDecoder(10));
                            c.pipeline().addLast(new StringDecoder());
                            c.pipeline().addLast(new EchoServerHandler());
                        } //initChannel()

                    });

            ChannelFuture future = bootstrap.bind(port).sync();

            future.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        } //try-finally

    } //bind()

} //EchoServer