netty服务器端启动

package com.imooc.netty.ch3;

import com.imooc.netty.ch6.AuthHandler;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.util.AttributeKey;

/**
 * @author
 */
public final class Server {

    public static void main(String[] args) throws Exception {
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();

        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childOption(ChannelOption.TCP_NODELAY, true)
                    .childAttr(AttributeKey.newInstance("childAttr"), "childAttrValue")
                    .handler(new ServerHandler())
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        public void initChannel(SocketChannel ch) {
                            ch.pipeline().addLast(new AuthHandler());
                            //..

                        }
                    });

            ChannelFuture f = b.bind().sync();

            f.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }
}

package com.imooc.netty.ch3;

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

import java.util.concurrent.TimeUnit;

public class ServerHandler extends ChannelInboundHandlerAdapter {
    @Override
    public void channelActive(ChannelHandlerContext ctx) {
        System.out.println("channelActive");
    }

    @Override
    public void channelRegistered(ChannelHandlerContext ctx) {
        System.out.println("channelRegistered");
    }

    @Override
    public void handlerAdded(ChannelHandlerContext ctx) {
        System.out.println("handlerAdded");
    }

    @Override
    public void channelRead(final ChannelHandlerContext ctx, Object msg) throws Exception {
        super.channelRead(ctx, msg);

        new Thread(new Runnable() {
            @Override
            public void run() {
                // 耗时的操作
                String result = loadFromDB();

                ctx.channel().writeAndFlush(result);
                ctx.executor().schedule(new Runnable() {
                    @Override
                    public void run() {
                        // ...
                    }
                }, , TimeUnit.SECONDS);

            }
        }).start();
    }

    private String loadFromDB() {
        return "hello world!";
    }
}

1:服务端的socket 在哪里进行初始化

2:在哪进行accept连接