package com.xjs.netty;

import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandler;
import io.netty.util.CharsetUtil;

/**
 * 自定义处理handler
 *
 * @author xiejs
 * @since 2022-03-09
 */
public class NettyServerHandler implements ChannelInboundHandler {

    /**
     * 通道读取事件
     *
     * @param ctx
     * @param msg
     * @throws Exception
     */
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        //ByteBuf byteBuf = (ByteBuf) msg;

        //System.out.println("客户端发送过来的消息：" + byteBuf.toString(CharsetUtil.UTF_8));
        System.out.println("客户端发送过来的消息：" + msg);

    }

    /**
     * 通道读取完毕事件
     * @param ctx
     * @throws Exception
     */
    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        ctx.writeAndFlush(Unpooled.copiedBuffer("你好，我是Netty服务端", CharsetUtil.UTF_8));
    }

    /**
     * 通道异常事件
     * @param ctx
     * @param cause
     * @throws Exception
     */
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }


    @Override
    public void channelRegistered(ChannelHandlerContext ctx) throws Exception {

    }

    @Override
    public void channelUnregistered(ChannelHandlerContext ctx) throws Exception {

    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {

    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {

    }




    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {

    }

    @Override
    public void channelWritabilityChanged(ChannelHandlerContext ctx) throws Exception {

    }

    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {

    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {

    }


}
