class Rufus::Scheduler

the job.
This method returns a job identifier which can be used to unschedule()

Returns the a job_id that can be used to unschedule the job.
Schedules a job by stating in how much time it should trigger.

def schedule_in (duration, params={}, &block)
  do_schedule_at(
    Time.new.to_f + duration_to_f(duration),
    prepare_params(params),
    &block)
end