OMT-215 batch platform

[edarchis]

Depends on changes in openimis-be_py

Adds the APscheduler for batch execution. Each module can create its own tasks that can be configured from settings.py file so that each administrator can tune it but also configure it from the environment.

There are two configurations:

• A module can expose a task and have it configured in the settings.py SCHEDULER_JOBS.
• For more advanced scheduling, the module can expose a method that will handle the scheduling itself. It can still accept any number of parameters that will be usable in the SCHEDULER_CUSTOM of settings.py

Example of settings:

SCHEDULER_JOBS = [
    {
        "method": "core.tasks.openimis_test_batch",
        "args": ["cron"],
        "kwargs": {"id": "openimis_test_batch", "minute": 54, "replace_existing": True},
    },
]
# This one is called directly with the scheduler object as first parameter. The methods can schedule things on their own
SCHEDULER_CUSTOM = [
    {
        "method": "core.tasks.sample_method",
        "args": ["sample"],
        "kwargs": {"sample_named": "param"},
    },
]

By default, the scheduler will run within the main Django instance. To prevent that, just set SCHEDULER_AUTOSTART=False To start the scheduler in its own process, simply use the command manage.py runapscheduler

[lgtm-com]

This pull request introduces 2 alerts when merging 1df1abc into bc63b4f - view on LGTM.com

new alerts:

• 1 for Non-callable called
• 1 for Unused import