def subclass(self, parent, name):
""" creates exception stub class with custom parent exception."""
if name not in self.__registry:
exception = create_exception_cls(name, "celery_rpc.exceptions",
parent=parent)
self.__registry[name] = exception
return self.__registry[name]
def subclass(self, parent, name):
""" creates exception stub class with custom parent exception."""
if name not in self.__registry:
exception = create_exception_cls(name,
"celery_rpc.exceptions",
parent=parent)
self.__registry[name] = exception
return self.__registry[name]
def __getattr__(self, item):
""" creates exception stub class for all missing attributes.
"""
try:
return object.__getattribute__(self, item)
except AttributeError:
if item not in self.__registry:
exception = create_exception_cls(item, "celery_rpc.exceptions",
parent=self.RemoteError)
self.__registry[item] = exception
return self.__registry[item]
def __getattr__(self, item):
""" creates exception stub class for all missing attributes.
"""
try:
return object.__getattribute__(self, item)
except AttributeError:
if item not in self.__registry:
exception = create_exception_cls(item,
"celery_rpc.exceptions",
parent=self.RemoteError)
self.__registry[item] = exception
return self.__registry[item]
def unpack_exception(self, data, serializer):
""" Instantiates exception stub for original exception
:param module: module name for original exception
:param name: class name for original exception
:param args: RemoteException.args
:return: new constructed exception
:rtype: self.RemoteError subclass
"""
try:
# unpacking RemoteException args
content_type, content_encoding, dumps = registry._encoders[
serializer]
data = loads(data, content_type, content_encoding)
module, name, args = data
try:
# trying to import original exception
original = symbol_by_name("%s.%s" % (module, name))
# creating parent class for original error and self.RemoteError
class_name = from_utf8("Remote" + name)
parent = type(class_name, (original, self.RemoteError),
{'__module__': module})
except (AttributeError, ImportError):
# alternative way for unknown errors
parent = self.RemoteError
# create and cache exception stub class
if name not in self.__registry:
self.__registry[name] = create_exception_cls(from_utf8(name),
module,
parent=parent)
exc_class = self.__registry[name]
return exc_class(*args)
except (ValueError, ContentDisallowed):
# loads error
return None
def unpack_exception(self, data, serializer):
""" Instantiates exception stub for original exception
:param module: module name for original exception
:param name: class name for original exception
:param args: RemoteException.args
:return: new constructed exception
:rtype: self.RemoteError subclass
"""
try:
# unpacking RemoteException args
content_type, content_encoding, dumps = registry._encoders[serializer]
data = loads(data, content_type, content_encoding)
module, name, args = data
try:
# trying to import original exception
original = symbol_by_name("%s.%s" % (module, name))
# creating parent class for original error and self.RemoteError
class_name = from_utf8("Remote" + name)
parent = type(class_name, (original, self.RemoteError),
{'__module__': module})
except (AttributeError, ImportError):
# alternative way for unknown errors
parent = self.RemoteError
# create and cache exception stub class
if name not in self.__registry:
self.__registry[name] = create_exception_cls(
from_utf8(name), module, parent=parent)
exc_class = self.__registry[name]
return exc_class(*args)
except (ValueError, ContentDisallowed):
# loads error
return None
