package com.zhgd.netty.udp;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioDatagramChannel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;

@Component
@Slf4j
public class UDPServerApp {
    @Autowired
    private UDPServerHandler udpServerHandler;

    @Value("${udp.port:}")
    private Integer port;

    @PostConstruct
    public void startUdpApp() {
        if (port == null) {
            return;
        }
        log.info("启动udp中……");
        Bootstrap bootstrap = new Bootstrap();
        EventLoopGroup workGroup = new NioEventLoopGroup();
        bootstrap.group(workGroup).channel(NioDatagramChannel.class)
                .option(ChannelOption.SO_BROADCAST, true)
                .handler(new ChannelInitializer<NioDatagramChannel>() {

                    @Override
                    protected void initChannel(NioDatagramChannel ch) throws Exception {
                        ch.pipeline().addLast(udpServerHandler);
                    }
                });
        try {
            Channel channel = bootstrap.bind(port).sync().channel();
            //channel.closeFuture().sync().await();
            log.info("启动udp成功，端口：{}", port);
        } catch (Exception e) {
            log.error("udp启动err:", e);
        }
    }
}