Python Apscheduler - Schedule Jobs dynamically (nested)
Question: We have a requirement to schedule multiple jobs dynamically while current job
is executing.

Approximate Scenario is:

  * There should be a scheduler to go through a table of application daily basis (assume at 6 AM UTC). 
  * Find the users who has today's datetime as `resume_dttime`
  * Dynamically schedule a job for that user and start his service at that today's `resume_dttime`

So the my code is:

    
    
    from apscheduler.schedulers.blocking import BlockingScheduler
    sched = BlockingScheduler()
    @sched.scheduled_job('cron', day_of_week='mon-fri', hour=6)
    def scheduled_job():
        """
        """
        liveusers = todays_userslist() #Get users from table with todays resume_dttime
        for u in liveusers:
            user_job = get_userjob(u.id)
            runtime = u.resume_dttime #eg u.resume_dttime is datetime(2015, 12, 13, 16, 30, 5)
            sched.add_job(user_job, 'date', run_date=runtime, args=[u.name])
    
    
    if __name__ == "__main__":
      sched.start()
      sched.shutdown(wait=True)
    

The queries are:

  * Is this the good way to add jobs dynamically?
  * The issue is, there could be 100 or more users. so, adding 100 jobs dynamically is a good idea? 
  * Is there any other way to achieve this?


Answer: APScheduler 3.0 was specifically designed to efficiently handle a high volume
of scheduled jobs, so I believe your intended way of using it is valid.

