shgx_tz_mes_backend_sync/ZR.Service/mes/andon/ScheduledBackgroundService.cs

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using ZR.Service.mes.andon.Iservice;

namespace ZR.Service.mes.andon
{
    public class ScheduledBackgroundService:BackgroundService
    {
        private readonly ILogger<ScheduledBackgroundService> _logger;
        private readonly IServiceScopeFactory _scopeFactory;
        private readonly TimeSpan _interval = TimeSpan.FromMinutes(5);//定时5分钟执行一次

        public ScheduledBackgroundService(
            ILogger<ScheduledBackgroundService> logger,
            IServiceScopeFactory scopeFactory)
        {
            _logger = logger;
            _scopeFactory = scopeFactory;
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            _logger.LogInformation($"定时后台服务启动，执行间隔: {_interval.TotalMinutes}分钟");

            // 延迟启动，等待应用完全初始化
            await Task.Delay(TimeSpan.FromSeconds(10), stoppingToken);

            while (!stoppingToken.IsCancellationRequested)
            {
                try
                {
                    _logger.LogInformation($"开始执行安灯超时上报定时任务: {DateTime.Now:HH:mm:ss}");
                    // 核心：创建作用域，获取Scoped服务
                    using (var scope = _scopeFactory.CreateScope())
                    {
                        // 获取你的报警业务服务（Scoped生命周期）
                        var alarmService = scope.ServiceProvider.GetRequiredService<AndonAlarmRecordService>();
                        // 执行你的自动超时上报逻辑
                        var result = alarmService.AlarmReportAuto();
                        _logger.LogInformation($"定时任务执行完成，结果：{result.Msg}");
                    }
                    _logger.LogInformation($"定时任务完成");
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "定时任务执行异常");
                }

                // 等待指定间隔
                // Task.Delay增加取消令牌检查，避免任务卡住
                if (!stoppingToken.IsCancellationRequested)
                {
                    await Task.Delay(_interval, stoppingToken);
                }
            }
            _logger.LogInformation("定时后台服务停止");
        }
    }
}