def __new__(cls, name, bases, attrs):
new = super(TaskType, cls).__new__
task_module = attrs.get('__module__') or '__main__'
# - Abstract class: abstract attribute should not be inherited.
abstract = attrs.pop('abstract', None)
if abstract or not attrs.get('autoregister', True):
return new(cls, name, bases, attrs)
# The 'app' attribute is now a property, with the real app located
# in the '_app' attribute. Previously this was a regular attribute,
# so we should support classes defining it.
app = attrs.pop('_app', None) or attrs.pop('app', None)
# Attempt to inherit app from one the bases
if not isinstance(app, Proxy) and app is None:
for base in bases:
if getattr(base, '_app', None):
app = base._app
break
else:
app = current_app._get_current_object()
attrs['_app'] = app
# - Automatically generate missing/empty name.
task_name = attrs.get('name')
if not task_name:
attrs['name'] = task_name = gen_task_name(app, name, task_module)
if not attrs.get('_decorated'):
# non decorated tasks must also be shared in case
# an app is created multiple times due to modules
# imported under multiple names.
# Hairy stuff, here to be compatible with 2.x.
# People should not use non-abstract task classes anymore,
# use the task decorator.
from celery.app.builtins import shared_task
unique_name = '.'.join([task_module, name])
if unique_name not in cls._creation_count:
# the creation count is used as a safety
# so that the same task is not added recursively
# to the set of constructors.
cls._creation_count[unique_name] = 1
shared_task(_CompatShared(
unique_name,
lambda app: TaskType.__new__(cls, name, bases,
dict(attrs, _app=app)),
))
# - Create and register class.
# Because of the way import happens (recursively)
# we may or may not be the first time the task tries to register
# with the framework. There should only be one class for each task
# name, so we always return the registered version.
tasks = app._tasks
if task_name not in tasks:
tasks.register(new(cls, name, bases, attrs))
instance = tasks[task_name]
instance.bind(app)
return instance.__class__
def __new__(cls, name, bases, attrs):
new = super(TaskType, cls).__new__
task_module = attrs.get('__module__') or '__main__'
# - Abstract class: abstract attribute should not be inherited.
abstract = attrs.pop('abstract', None)
if abstract or not attrs.get('autoregister', True):
return new(cls, name, bases, attrs)
# The 'app' attribute is now a property, with the real app located
# in the '_app' attribute. Previously this was a regular attribute,
# so we should support classes defining it.
app = attrs.pop('_app', None) or attrs.pop('app', None)
# Attempt to inherit app from one the bases
if not isinstance(app, Proxy) and app is None:
for base in bases:
if getattr(base, '_app', None):
app = base._app
break
else:
app = current_app._get_current_object()
attrs['_app'] = app
# - Automatically generate missing/empty name.
task_name = attrs.get('name')
if not task_name:
attrs['name'] = task_name = gen_task_name(app, name, task_module)
if not attrs.get('_decorated'):
# non decorated tasks must also be shared in case
# an app is created multiple times due to modules
# imported under multiple names.
# Hairy stuff, here to be compatible with 2.x.
# People should not use non-abstract task classes anymore,
# use the task decorator.
from celery.app.builtins import shared_task
unique_name = '.'.join([task_module, name])
if unique_name not in cls._creation_count:
# the creation count is used as a safety
# so that the same task is not added recursively
# to the set of constructors.
cls._creation_count[unique_name] = 1
shared_task(_CompatShared(
unique_name,
lambda app: TaskType.__new__(cls, name, bases,
dict(attrs, _app=app)),
))
# - Create and register class.
# Because of the way import happens (recursively)
# we may or may not be the first time the task tries to register
# with the framework. There should only be one class for each task
# name, so we always return the registered version.
tasks = app._tasks
if task_name not in tasks:
tasks.register(new(cls, name, bases, attrs))
instance = tasks[task_name]
instance.bind(app)
return instance.__class__