Question

This is my Quartz configuration:

  <quartz>
    <add key="quartz.scheduler.instanceName" value="EmailScheduler" />
    <!-- Configure Thread Pool -->
    <add key="quartz.threadPool.type" value="Quartz.Simpl.SimpleThreadPool, Quartz" />
    <add key="quartz.threadPool.threadCount" value="10" />
    <add key="quartz.threadPool.threadPriority" value="Normal" />
    <!-- Configure Job Store -->
    <add key="quartz.jobStore.misfireThreshold" value="60000" />
    <add key="quartz.jobStore.type" value="Quartz.Impl.AdoJobStore.JobStoreTX, Quartz" />
    <add key="quartz.jobStore.driverDelegateType" value="Quartz.Impl.AdoJobStore.StdAdoDelegate, Quartz" />
    <add key="quartz.jobStore.dataSource" value="default" />
    <add key="quartz.jobStore.lockHandler.type" value="Quartz.Impl.AdoJobStore.UpdateLockRowSemaphore, Quartz" />
    <add key="quartz.dataSource.default.provider" value="SqlServer-20" />
    <add key="quartz.dataSource.default.connectionString" value="data source= ......" />
    <add key="quartz.jobStore.tablePrefix" value="QRTZ_" />
  </quartz>

here is my IInterruptableJob:

public class JobC : Quartz.IInterruptableJob
{
    public void Interrupt()
    {
        Console.WriteLine("Job Interrupt() called at " + DateTime.Now);
    }

    public void Execute(IJobExecutionContext context)
    {
        // what code I should write here to detect misfires???
        Console.WriteLine("FireTime at " + context.FireTimeUtc.Value + " PreviousFireTime at:" + (context.PreviousFireTimeUtc.HasValue ? context.PreviousFireTimeUtc.Value.ToString() : "NULL"));
    }
}

Here is my job and trigger:

var job = JobBuilder.Create<JobC>().WithIdentity(new JobKey("JobC")).RequestRecovery(true).Build();
var trigger = TriggerBuilder.Create()
    .WithSimpleSchedule(x => x
        .RepeatForever()
        .WithIntervalInSeconds(2)
            // I'm ignoring misfires here, but seems it doesn't work!
        .WithMisfireHandlingInstructionIgnoreMisfires())
    .StartNow()
    .Build();

var scheduler = new Quartz.Impl.StdSchedulerFactory().GetScheduler();
scheduler.Start();
scheduler.ScheduleJob(job, trigger);

After I call scheduler.PauseAll() all jobs pause and after calling scheduler.ResumeAll() all missed fires, get fired! but I want to ignore them and just continue from now on.

Thanks in advance.

Answer 1

It may seems stupid, but I made following extension method to detect misfires inside Execute method:

public static bool IsMissedFire(this IJobExecutionContext context, int offsetMilliseconds)
{
    if (!context.ScheduledFireTimeUtc.HasValue)
        return false;
    if (!context.FireTimeUtc.HasValue)
        return false;

    var scheduledFireTimeUtc = context.ScheduledFireTimeUtc.Value;
    var fireTimeUtc = context.FireTimeUtc.Value;

    return fireTimeUtc.Subtract(scheduledFireTimeUtc).TotalMilliseconds > offsetMilliseconds;
}

Usage is simple:

public void Execute(IJobExecutionContext context)
{
    if (context.IsMissedFire(1000))
        Console.WriteLine("Missfire");
    else
        Console.WriteLine("Fire");
}