Workers

The presence data is automaticaly updated from the time based worker asking Centrifugo who is on the socket. This data is broadcasted to the clients over the websocket.

Default worker

The default worker for presence updates is a go module. Install with the command python manage.py installpres: it will generate two files in your main project directory:

• centpres: the executable
• centpres_config.json: the config file

To run the worker: ./centpres. This will start updating presence info.

Note: you can also compile the go module from the source in presence/go/src/

Alternate workers

For those who want a more traditional way two python async backends are supported: Celery and Huey.

For Celery in settings.py:

PRESENCE_ASYNC_BACKEND = "celery"

from datetime import timedelta
CELERYBEAT_SCHEDULE = {
    'update-presence': {
        'task': 'presence.tasks.update_presence',
        'schedule': timedelta(seconds=30),
    },
}

Then:

celery -A project_name beat  -l info --broker='redis://localhost:6379/0'
celery -A project_name worker  -l info --broker='redis://localhost:6379/0'
# or whatever broker or settings

For Huey in settings.py:

PRESENCE_ASYNC_BACKEND = "huey"

from huey import RedisHuey
HUEY = RedisHuey('your_project_name')

Then:

python manage.py run_huey

Note: Huey is limited: it will update presence info every minute