from celery import current_app
from celery.local import LocalProxy
from celery.utils import get_cls_by_name
BACKEND_ALIASES = {
"amqp": "celery.backends.amqp.AMQPBackend",
"cache": "celery.backends.cache.CacheBackend",
"redis": "celery.backends.pyredis.RedisBackend",
"mongodb": "celery.backends.mongodb.MongoBackend",
"tyrant": "celery.backends.tyrant.TyrantBackend",
"database": "celery.backends.database.DatabaseBackend",
"cassandra": "celery.backends.cassandra.CassandraBackend",
}
_backend_cache = {}
def get_backend_cls(backend, loader=None):
"""Get backend class by name/alias"""
loader = loader or current_app.loader
if backend not in _backend_cache:
aliases = dict(BACKEND_ALIASES, **loader.override_backends)
_backend_cache[backend] = get_cls_by_name(backend, aliases)
return _backend_cache[backend]
# deprecate this.
default_backend = LocalProxy(lambda: current_app.backend)
import os
import sys
VERSION = (2, 3, 0, "a2")
__version__ = ".".join(map(str, VERSION[0:3])) + "".join(VERSION[3:])
__author__ = "Ask Solem"
__contact__ = "*****@*****.**"
__homepage__ = "http://celeryproject.org"
__docformat__ = "restructuredtext"
if sys.version_info < (2, 5):
raise Exception("Python 2.4 is not supported by this version. "
"Please use Celery versions 2.1.x or earlier.")
def Celery(*args, **kwargs):
from celery.app import App
return App(*args, **kwargs)
if not os.environ.get("CELERY_NO_EVAL", False):
from celery.local import LocalProxy
def _get_current_app():
from celery.app import current_app
return current_app()
current_app = LocalProxy(_get_current_app)