device-status/src/main/java/com/example/device/controller/DeviceStatus.java

package com.example.device.controller;
import com.example.device.entity.Device;
import com.example.device.entity.Status;
import com.example.device.service.DeviceService;
import com.example.device.service.StatusService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import java.io.IOException;
import java.net.InetAddress;
import java.time.LocalDateTime;
import java.util.List;

@Component
@EnableScheduling
public class DeviceStatus {
    @Autowired
    private DeviceService deviceService;

    @Autowired
    private  StatusService statusService;


     //每天凌晨开始执行，每4小时执行一次
    @Scheduled(cron = "0 0 4/0 * * ?")
    public void generateDeviceStatus(){
        deviceStatus();
    }
    public  void deviceStatus() {
        Status status=new Status();
        List<Device> deviceList = deviceService.SelectList();
        for (Device device : deviceList) {
            try {
                InetAddress address = InetAddress.getByName(device.getDeviceIp());
                boolean reachable = address.isReachable(5000); // Timeout: 5 seconds
                status.setDeviceNo(device.getDeviceNo());
                status.setDeviceName(device.getDeviceName());
                LocalDateTime localDateTime = LocalDateTime.now();
                status.setTime(localDateTime);
                //1-在线   0-离线
                if (reachable) {
                    status.setDeviceStatus(1);
                } else {
                    status.setDeviceStatus(0);
                }
                statusService.Add(status);
            } catch (IOException e) {
                System.out.println("Error pinging " + device.getDeviceIp() + ": " + e.getMessage());
            }
        }
        }

}