EchoServerV4FirstHandler.java

package com.github.nettybook.ch4;

import java.nio.charset.Charset;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

/**
 * Handler implementation for the echo server.
 */
public class EchoServerV4FirstHandler extends ChannelInboundHandlerAdapter {
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) {
        ByteBuf readMessage = (ByteBuf) msg;
        System.out.println("FirstHandler channelRead : " + readMessage.toString(Charset.defaultCharset()));
        ctx.write(msg);
        ctx.fireChannelRead(msg);
    }
}