.net core中Quartz的使用

原来工作中有用到定时任务Quartz，不过是在MVC项目中，现在net core项目中也要用到，就开始改版。中间发现在网上的教程只有执行定时计划的过程，却很少有人写注册的过程，觉得有点略坑。所以写此文章一是自己做个记录，二是希望能帮助到其他人。后面还把此功能做出了多任务定时执行，网上关于net core的教程更是少了，花费了不少时间实现了出来。

Quartz版本：3.0.7

1.NuGet中下载安装Quartz

2.新建Quartz帮助类

(1)新建QuartzJob类，代码如下：

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

            LogHelper.Info($"{DateTime.Now} QuartzJob:==>>自动执行.{jobKey.Name}|{triggerKey.Name}");
            await Task.CompletedTask;
        }
    }

ps： 上面代码中的jobKey和triggerKey可获取到自己定义的job和trigger的信息，这样做多任务时可区分要执行的是哪个任务. 另LogHelper.Info是自己封装好的日子记录类，可替换为自己的日志类

（2）新建QuartzFactory类，代码如下：

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类，代码如下：

#region 单任务
        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()).RepeatForever())
                .ForJob(job)
                .Build();

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

        #region 多任务
        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()).RepeatForever())
                .ForJob(job)
                .Build();

            var trigger2 = TriggerBuilder.Create()
                .WithIdentity("job.trigger2")
                .StartNow()
                .WithSimpleSchedule(x => x.WithInterval(TimeSpan.FromSeconds()).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中注册代码

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

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

ps: 因AddQuartz方法定义的是Type[]类型，所以可传多个执行类，如：services.AddQuartz(typeof(QuartzJob1), typeof(QuartzJob2)); 不过这样做StartJob()方法就得另处理下，这里就略过

OK，大功告成，这个东西折腾了两天终于尘埃落定了，执行结果如下：