Simple background tasks for Django
A simple background task worker that uses your Django database and admin for management. This project is meant for small to medium scale uses. If you need something more, check out Celery.
Download the package
pip install django-workers
and add it to your Django installed apps
INSTALLED_APPS = [ # ... 'workers', # ... ]
tasks.py file in the Django app you'd like to have tasks in. These tasks will automatically
become available thanks to autodiscovery.
from workers import task @task() def say_hello(name): print('Howdy', name)
Tasks become simple Python callables. Calling them inserts that task to your Django database and waits for a worker to pick it up.
say_hello('Foo') # Sent to background automatically
Running the workers
Now boot-up your workers to crunch some data. Workers poll the Database for new tasks they should work on.
python manage.py runworkers
Sometimes you want to run a specific task every X seconds or at a later date. Thats what scheduled tasks are for.
Repeating scheduled tasks
Tasks specified with a schedule in seconds will repeat.
from workers import task @task(schedule=10) def do_something(): print('I run every 10 seconds') @task(schedule=60*5) def do_something_later(): print('I run every 5 minutes') @task(schedule=60*60*8) def do_something_even_later(): print('I run every 8 hours')
Date scheduled tasks
Tasks can be scheduled to run once at a later date by passing a
when the task is called.
from datetime import datetime, timedelta from workers import task trial_end_date = datetime.utcnow() + timedelta(days=14) @task() def trial_ending(): send_email('Your trial is ending!') # Specifying the `schedule` argument will tell the worker when this task should run trial_ending(_schedule=trial_end_date)
You can optionally override these settings in your Django
WORKERS_SLEEP(default 5) - Wait in seconds before checking for tasks, if none were found
WORKERS_PURGE(default 1,000) - How many recent task logs to keep in the admin
TODO (not working)
WORKERS_TIMEOUT(default 30) - Seconds a task can run before its killed
WORKERS_RETRY(default 3) - Number of retries before giving up
WORKERS_CONCURRENCY(default 1) - Number of worker processes to run
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