tom-price / django-rq-scheduler

A database backed job scheduler for Django RQ and RQ Scheduler

Django RQ Scheduler

A database backed job scheduler for Django RQ.

Requirements

Currently, when you pip install Django RQ Scheduler the following packages are also installed.

• django >= 2
• django-model-utils >= 2.4
• django-rq >= 2.0 (Django RQ requires RQ >= 1.0 due to changes in redis >= 3)
• rq-scheduler >= 0.9.0
• pytz >= 2018.5
• croniter >= 0.3.24

Testing also requires:

• factory_boy >= 2.11.1

Usage

Install

Use pip to install:

pip install django-rq-scheduler

Update Django Settings

1. In settings.py, add django_rq and scheduler to INSTALLED_APPS:

   
   INSTALLED_APPS = [
   	...
   	'django_rq',
   	'scheduler',
   	...
   ]
   
   
   

   If you also wish to run the underpinning RQ Scheduler at an interval different from its default of once every 60 seconds you can do so by setting DJANGO_RQ_SCHEDULER_INTERVAL to the new preferred interval. This is important if you want a job to either run multiple times a minute or to schedule a job more precisely than within a 60 second window.

2. Configure Django RQ. See https://github.com/ui/django-rq#installation

Migrate

The last step is migrate the database:

./manage.py migrate

Creating a Job

See http://python-rq.org/docs/jobs/ or https://github.com/ui/django-rq#job-decorator

An example:

myapp.jobs.py

@job
def count():
    return 1 + 1

Scheduling a Job

Scheduled Job

1. Sign into the Django Admin site, http://localhost:8000/admin/ and locate the Django RQ Scheduler section.

2. Click on the Add link for Scheduled Job.

3. Enter a unique name for the job in the Name field.

4. In the Callable field, enter a Python dot notation path to the method that defines the job. For the example above, that would be myapp.jobs.count

5. Choose your Queue. Side Note: The queues listed are defined in the Django Settings.

6. Enter the time the job is to be executed in the Scheduled time field. Side Note: Enter the date via the browser's local timezone, the time will automatically convert UTC.

7. Click the Save button to schedule the job.

Repeatable Job

1. Sign into the Django Admin site, http://localhost:8000/admin/ and locate the Django RQ Scheduler section.

2. Click on the Add link for Repeatable Job

3. Enter a unique name for the job in the Name field.

4. In the Callable field, enter a Python dot notation path to the method that defines the job. For the example above, that would be myapp.jobs.count

5. Choose your Queue. Side Note: The queues listed are defined in the Django Settings.

6. Enter the time the first job is to be executed in the Scheduled time field. Side Note: Enter the date via the browser's local timezone, the time will automatically convert UTC.

7. Enter an Interval, and choose the Interval unit. This will calculate the time before the function is called again.

   • The result TTL must be either indefinite -1, unset, or greater than this interval.
   • The Interval must be a multiple of the scheduler's interval. With a default config this interval is 60 seconds and is only a consideration when using seconds as the Interval Unit. If a shorter interval is needed rq-scheduler's interval can be changed by setting DJANGO_RQ_SCHEDULER_INTERVAL to something other than 60; it's advised to set it to a divisor of 60.

8. In the Repeat field, enter the number of time the job is to be ran. Leaving the field empty, means the job will be scheduled to run forever.

9. Click the Save button to schedule the job.

Reporting issues or Features

Please report issues via GitHub Issues .