Better documentation for dynamic periodic tasks about huey HOT 1 CLOSED

Where are dynamic periodic tasks stored.

This is answered in the very first paragraph of the docs you linked...

To create periodic tasks dynamically we need to register them so that they are added to the in-memory schedule managed by the consumer’s scheduler thread. Since this registry is in-memory, any dynamically defined tasks must be registered within the process that will ultimately schedule them: the consumer.

It is not possible to pass arguments to periodic tasks.

I don't have a good understanding of how Huey works

Yes... to use dynamic periodic tasks you should absolutely understand how Huey works in-and-out because there are lots of gotcha's.

I'm going to skip trying to answer your other questions and just say this... Just about every single time someone asks for dynamic periodic tasks, they are someone with not very much experience or understanding of how this tooling works. They think they've stumbled on some magic recipe that will solve all their problems without realizing that they've simply pushed their problem into a harder place to manage.

The correct way to do what you're asking about, in my opinion, is to persist the user schedules in the database like you would normally. e.g.:

• User 1: 9am cnn headlines
• User 1: 9pm bbc headlines
• User 2: ...
• User 3: ...

Then run a single periodic task every 15 minutes or every hour -- whatever the minimum granularity you want to allow your users to schedule things.

When that single periodic task runs, it will check all the user schedules for the current time and process them. It can delegate to sub-tasks, alternatively, e.g.:

@huey.periodic_task(crontab(minute='0'))  # Run every hour, on the hour.
def schedule_messages():
    now = datetime.datetime.now()
    for user_schedule in UserSchedule.get_list_for_time(now):
        fetch_user_schedule(user_schedule)

@huey.task()
def fetch_user_schedule(user_schedule):
    # ... fetch headlines or whatever ..

When a user wants to created, edit, or delete their schedule all you need to do is modify the database table. No need to use dynamic periodic tasks.

from huey.