python - How to update Celery Task ETA? -

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i building simple waiting list app in django 1.10.3 using celery 4.1.0.

i have following base tasks:

@shared_task def start_user_counter():     logging.info('task executed @ {}'.format(datetime.datetime.utcnow()))     # task executed when user reaches top of queue.     # send email, perform other stuff in here ...  @shared_task def update_queue():     curr_time = datetime.datetime.utcnow()     logging.info('task called @ {}'.format(curr_time))     time_to_exec = curr_time + datetime.timedelta(seconds=10)     # here, perform checks if task exists in redis     # if not exist - create new 1 , store redis     # if exist - update task's eta.     task_id = start_user_counter.apply_async(eta=time_to_exec)     logging.info('task id: {}'.format(task_id))     # ...  update_queue.delay()

each task represents 1 user on waiting list. new user assigned eta when suppose removed waiting list (he reached top @ eta). however, each user has possibility speed time when reach top of waiting list.

question: how can update eta of existing task execcutes earlier first anticipated?





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