.net core中Quartz的使用

原來工作中有用到定時任務Quartz，不過是在MVC項目中，現在net core項目中也要用到，就開始改版。中間發現在網上的教程只有執行定時計劃的過程，卻很少有人寫註冊的過程，覺得有點略坑。所以寫此文章一是自己做個記錄，二是希望能幫助到其他人。後面還把此功能做出了多任務定時執行，網上關於net core的教程更是少了，花費了不少時間實現了出來。

Quartz版本：3.0.7

1.NuGet中下載安裝Quartz

2.新建Quartz幫助類

 (1)新建QuartzJob類，代碼如下：

public class QuartzJob : IJob
    {
        public async Task Execute(IJobExecutionContext context)
        {
            var jobKey = context.JobDetail.Key;//獲取job信息
            var triggerKey = context.Trigger.Key;//獲取trigger信息

            LogHelper.Info($"{DateTime.Now} QuartzJob:==>>自動執行.{jobKey.Name}|{triggerKey.Name}");
            await Task.CompletedTask;
        }
    }

  ps： 上面代碼中的jobKey和triggerKey可獲取到自己定義的job和trigger的信息，這樣做多任務時可區分要執行的是哪個任務. 另LogHelper.Info是自己封裝好的日子記錄類，可替換為自己的日誌類

（2）新建QuartzFactory類，代碼如下： 

public class QuartzFactory : IJobFactory
    {
        private readonly IServiceProvider _serviceProvider;

        public QuartzFactory(IServiceProvider serviceProvider)
        {
            _serviceProvider = serviceProvider;
        }

        public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)
        {
            var jobDetail = bundle.JobDetail;

            var job = (IJob)_serviceProvider.GetService(jobDetail.JobType);
            return job;
        }

        public void ReturnJob(IJob job)
        {
        }
    }

 （3）新建QuartzService類，代碼如下：

#region 單任務
        public static void StartJob<TJob>() where TJob : IJob
        {
            var scheduler = new StdSchedulerFactory().GetScheduler().Result;

            var job = JobBuilder.Create<TJob>()
                .WithIdentity("job")
                .Build();

            var trigger1 = TriggerBuilder.Create()
                .WithIdentity("job.trigger")
                .StartNow()
                .WithSimpleSchedule(x => x.WithInterval(TimeSpan.FromSeconds(5)).RepeatForever())
                .ForJob(job)
                .Build();

            scheduler.AddJob(job, true);
            scheduler.ScheduleJob(job, trigger1);
            scheduler.Start();
        }
        #endregion

        #region 多任務
        public static void StartJobs<TJob>() where TJob : IJob
        {
            var scheduler = new StdSchedulerFactory().GetScheduler().Result;

            var job = JobBuilder.Create<TJob>()
                .WithIdentity("jobs")
                .Build();

            var trigger1 = TriggerBuilder.Create()
                .WithIdentity("job.trigger1")
                .StartNow()
                .WithSimpleSchedule(x => x.WithInterval(TimeSpan.FromSeconds(5)).RepeatForever())
                .ForJob(job)
                .Build();

            var trigger2 = TriggerBuilder.Create()
                .WithIdentity("job.trigger2")
                .StartNow()
                .WithSimpleSchedule(x => x.WithInterval(TimeSpan.FromSeconds(11)).RepeatForever())
                .ForJob(job)
                .Build();

            var dictionary = new Dictionary<IJobDetail, IReadOnlyCollection<ITrigger>>
            {
                {job, new HashSet<ITrigger> {trigger1, trigger2}}
            };
            scheduler.ScheduleJobs(dictionary, true);
            scheduler.Start();
        }
        #endregion

        #region 配置
        public static void AddQuartz(this IServiceCollection services, params Type[] jobs)
        {
            services.AddSingleton<IJobFactory, QuartzFactory>();
            services.Add(jobs.Select(jobType => new ServiceDescriptor(jobType, jobType, ServiceLifetime.Singleton)));

            services.AddSingleton(provider =>
            {
                var schedulerFactory = new StdSchedulerFactory();
                var scheduler = schedulerFactory.GetScheduler().Result;
                scheduler.JobFactory = provider.GetService<IJobFactory>();
                scheduler.Start();
                return scheduler;
            });
        }
        #endregion

3.在Startup.cs中註冊代碼

public void ConfigureServices(IServiceCollection services)
{
            services.AddQuartz(typeof(QuartzJob));

           //........
}


public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
    QuartzService.StartJobs<QuartzJob>();
    //........
}

 ps: 因AddQuartz方法定義的是Type[]類型，所以可傳多個執行類，如：services.AddQuartz(typeof(QuartzJob1), typeof(QuartzJob2)); 不過這樣做StartJob()方法就得另處理下，這裡就略過

OK，大功告成，這個東西折騰了兩天終於塵埃落定了，執行結果如下：