This document describes the current stable version of Celery (3.1). For development docs, go here.

celery.loaders.base

celery.loaders.base

Loader base class.

class celery.loaders.base.BaseLoader(app, **kwargs)

The base class for loaders.

Loaders handles,

• Reading celery client/worker configurations.

• What happens when a task starts?

  See on_task_init().

• What happens when the worker starts?

  See on_worker_init().

• What happens when the worker shuts down?

  See on_worker_shutdown().

• What modules are imported to find tasks?

autodiscover_tasks(packages, related_name='tasks')

builtin_modules = frozenset([])

cmdline_config_parser(args, namespace='celery', re_type=<_sre.SRE_Pattern object>, extra_types={'json': <function loads at 0x7feb22593320>}, override_types={'dict': 'json', 'list': 'json', 'tuple': 'json'})

conf

Loader configuration.

config_from_object(obj, silent=False)

configured = False

find_module(module)

import_default_modules()

import_from_cwd(module, imp=None, package=None)

import_module(module, package=None)

import_task_module(module)

init_worker()

init_worker_process()

mail

mail_admins(subject, body, fail_silently=False, sender=None, to=None, host=None, port=None, user=None, password=None, timeout=None, use_ssl=False, use_tls=False, charset='utf-8')

now(utc=True)

on_process_cleanup()

This method is called after a task is executed.

on_task_init(task_id, task)

This method is called before a task is executed.

on_worker_init()

This method is called when the worker (celery worker) starts.

on_worker_process_init()

This method is called when a child process starts.

on_worker_shutdown()

This method is called when the worker (celery worker) shuts down.

override_backends = {}

read_configuration(env='CELERY_CONFIG_MODULE')

shutdown_worker()

worker_initialized = False