using System.Threading.Tasks;

using System;

using Quartz;

using Quartz.Impl;

using Quartz.Spi;

​

public class Program

{

    static async Task Main()

    {

        var cs = Quartz.CronScheduleBuilder.CronSchedule(" 0 0 12 20/1 * ? *");

        ShowFireTimes(cs);

​

        await Test(cs , "Default");

        await Test(cs.WithMisfireHandlingInstructionDoNothing()      , "WithMisfireHandlingInstructionDoNothing" );

        await Test(cs.WithMisfireHandlingInstructionIgnoreMisfires() , "WithMisfireHandlingInstructionIgnoreMisfires");

        await Test(cs.WithMisfireHandlingInstructionFireAndProceed() , "WithMisfireHandlingInstructionFireAndProceed");

    }

​

    static void ShowFireTimes(CronScheduleBuilder sb)

    {

        var trig  =   (IOperableTrigger) CreateTrigger(sb);

        var dt = trig.ComputeFirstFireTimeUtc(null);

        while (dt != null)

        {

            Console.WriteLine($"Trigger fires at {dt}");            

            dt = trig.GetFireTimeAfter(dt); 

        }

        Console.WriteLine();

    }

​

    static ITrigger CreateTrigger(CronScheduleBuilder sb)

    {

        return TriggerBuilder

            .Create()

            .WithIdentity("trigger1", "group1")

            .StartAt(new DateTime(2023,8, 1))

            .EndAt  (new DateTime(2023,8,23))

            .WithSchedule(sb)

            .Build();

    }

​

    static async Task Test(CronScheduleBuilder sb , string description)

    {

        var sched = await new StdSchedulerFactory().GetScheduler();

​

        IJobDetail job = JobBuilder.Create<DumbJob>().WithIdentity( description, "group1").Build();

​

        DateTimeOffset ft = await sched.ScheduleJob(job, CreateTrigger(sb));

​

        await sched.Start();

        await Task.Delay(TimeSpan.FromSeconds(1));

        await sched.Shutdown(true);

​

        SchedulerMetaData metaData = await sched.GetMetaData();

        Console.WriteLine($"{description} Executed {metaData.NumberOfJobsExecuted} job(s).");

​

        Console.WriteLine();

    }

​

    public class DumbJob : Quartz.IJob

    {

        public virtual async Task Execute(IJobExecutionContext context)

        {

            Console.WriteLine($"Executing {context.JobDetail.Key.Name} at {DateTime.UtcNow}");

            await Task.CompletedTask;

        }

    }

}

​