package com.zehong.gassdevicereport.netty;

import com.zehong.gassdevicereport.netty.handler.UDPServerHandler;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioDatagramChannel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;

/**
 * 物联网 开启检测 并写入数据库
 */
@Component
public class NettyUDPStart {

    private Logger logger = LoggerFactory.getLogger(NettyUDPStart.class);

    @Resource
    private UDPServerHandler UDPServerHandler;
    private EventLoopGroup bossGroup = new NioEventLoopGroup();

    @Value("${UDPNetty.ports}")
    private int[] ports;
    /**
     * 启动netty服务
     * @throws InterruptedException
     */
    @PostConstruct
    public void start() throws InterruptedException {
        Bootstrap b=new Bootstrap ();
        b.group(bossGroup)
                .channel(NioDatagramChannel.class)
                .option(ChannelOption.SO_BACKLOG,128)
                .handler(UDPServerHandler);
        //开启需要监听 的端口
        for(int port : ports){
            ChannelFuture future = b.bind(port).sync();
            if (future.isSuccess()) {
                logger.info("UDP server启动 "+ port +" 成功");
            }
        }
    }

    /**
     * 销毁
     */
    @PreDestroy
    public void destroy() {
        bossGroup.shutdownGracefully().syncUninterruptibly();
        logger.info("UDP server关闭 Netty 成功");
    }
}