网络编程利器之Netty专题（三）-优快云博客

本文链接：https://blog.youkuaiyun.com/zgp11zgp/article/details/122124564

本文介绍Netty网络编程中BossGroup和WorkerGroup的分工原理及应用实例，通过细致划分职责提升网络I/O效率。

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网络编程利器之Netty专题（三）

细化分工 BossGroup和WorkerGroup

BossGroup和WorkerGroup都是NioEventLoopGroup，BossGroup用来处理nio的Accept，Worker处理nio的Read和Write事件

在这里插入图片描述


<dependencies>
    <dependency>
        <groupId>io.netty</groupId>
        <artifactId>netty-all</artifactId>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.2</version>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.16.20</version>
        <scope>compile</scope>
    </dependency>
</dependencies>

package com.dahuilang;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import lombok.extern.slf4j.Slf4j;

import java.nio.charset.Charset;

@Slf4j
public class EventLoopServer {
    public static void main(String[] args) {
        //分工细化
        new ServerBootstrap()
                //boss 和 worker
                //boss 只负责ServerSocketChannel accept 事件， worker 只负责 socketChannel 上的读写
                .group(new NioEventLoopGroup(),new NioEventLoopGroup(3))
                .channel(NioServerSocketChannel.class)
                .childHandler(new ChannelInitializer<NioSocketChannel>() {
                    protected void initChannel(NioSocketChannel ch) throws Exception {
                        ch.pipeline().addLast(new ChannelInboundHandlerAdapter(){
                            @Override
                            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
                                ByteBuf buf = (ByteBuf) msg;
                                log.debug(buf.toString(Charset.defaultCharset()));
                            }
                        });

                    }
                })
                .bind(8888);
    }

}