How do I schedule a job to be run at a specific date in Hangfire

问题

Hangfire.io supports making a CRON-like scheduling of recurring jobs. But how do I specify, that a specific job should be run once, at a specific date/time, e.g. that a job should be run June 4th 2016, at 16:22 - and only at that specific point in time?

A similar way to ask the same question could be: how large a subset of the CRON expression described here, is supported by Hangfire? (The described CRON expression supports a "Year"-field which could be used).

Also, do you think Hangfire is the best choice to schedule one-off batch jobs in the first place, provided that I use Hangfire for job processing?

回答1:

You can use BackgroundJob.Schedule(Expression> methodCall, DateTimeOffsetdt) method.

BackgroundJob.Schedule(methodCall, enqueueAt);

回答2:

Cron expression with Year is not supported by Hangfire.

To run a job at specific point in time, use following schedule method overload from BackgroundJob class.

public static string Schedule([InstantHandle] Expression<Action> methodCall, DateTimeOffset enqueueAt);

BackgroundJob.Schedule(() => Console.Write("test"), new DateTime(2016, 6, 4, 16, 22, 0));

回答3:

In one of my application we schedule a job for only once run in a particular date time. Look into below code

  public string Schedule(Expression<Action> methodToCall, DateTimeOffset enqueueAt)
    {
        return BackgroundJob.Schedule(methodToCall, enqueueAt);
    }

Where enqueueAt is the date time when you want to run the job.

来源：https://stackoverflow.com/questions/35698361/how-do-i-schedule-a-job-to-be-run-at-a-specific-date-in-hangfire

标签

batch-processing

cronexpression

hangfire