nettyechoclientdemo.EchoClient.java Source code

Introduction

Here is the source code for nettyechoclientdemo.EchoClient.java

Source

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package nettyechoclientdemo;

import io.netty.bootstrap.Bootstrap;
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.NioSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;

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

    public EchoClient() {
    } //EchoClient()

    public void connect(int port, String host) throws InterruptedException {
        EventLoopGroup group = new NioEventLoopGroup();

        try {
            Bootstrap bootstrap = new Bootstrap();

            bootstrap.group(group).channel(NioSocketChannel.class).option(ChannelOption.TCP_NODELAY, true)
                    .handler(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 StringDecoder());
                            c.pipeline().addLast(new EchoClientHandler());
                        } //initChannel()                
                    });

            ChannelFuture future = bootstrap.connect(host, port).sync();

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

    } //connect()

} //EchoClient