def get_scheduler(self,
lazy=False,
extension_namespace='celery.beat_schedulers'):
filename = self.schedule_filename
aliases = dict(load_extension_class_names(extension_namespace) or {})
return symbol_by_name(self.scheduler_cls, aliases=aliases)(
app=self.app,
schedule_filename=filename,
max_interval=self.max_interval,
lazy=lazy,
)
def by_name(backend=None, loader=None,
extension_namespace='celery.result_backends'):
"""Get backend class by name/alias."""
backend = backend or 'disabled'
loader = loader or current_app.loader
aliases = dict(BACKEND_ALIASES, **loader.override_backends)
aliases.update(load_extension_class_names(extension_namespace))
try:
cls = symbol_by_name(backend, aliases)
except ValueError as exc:
reraise(ImproperlyConfigured, ImproperlyConfigured(
UNKNOWN_BACKEND.strip().format(backend, exc)), sys.exc_info()[2])
if isinstance(cls, types.ModuleType):
raise ImproperlyConfigured(UNKNOWN_BACKEND.strip().format(
backend, 'is a Python module, not a backend class.'))
return cls
def by_name(backend=None, loader=None,
extension_namespace='celery.result_backends'):
"""Get backend class by name/alias."""
backend = backend or 'disabled'
loader = loader or current_app.loader
aliases = dict(BACKEND_ALIASES, **loader.override_backends)
aliases.update(
load_extension_class_names(extension_namespace) or {})
try:
cls = symbol_by_name(backend, aliases)
except ValueError as exc:
reraise(ImproperlyConfigured, ImproperlyConfigured(
UNKNOWN_BACKEND.strip().format(backend, exc)), sys.exc_info()[2])
if isinstance(cls, types.ModuleType):
raise ImproperlyConfigured(UNKNOWN_BACKEND.strip().format(
backend, 'is a Python module, not a backend class.'))
return cls