def get(self, instance=None):
try:
return self.cache[instance]
except AttributeError:
hashable = False
except KeyError:
hashable = True
identity = None
token = None
assembly = Assembly.current()
if instance:
identity = '%s/%s' % (instance.__identity__, self.attr)
if identity in assembly.configuration:
token = identity
if not token:
if self.token:
token = self.token
#if token not in assembly.configuration and self.configuration_required:
# raise ConfigurationError(token)
if identity and not assembly.should_isolate(identity):
identity = None
else:
token = identity
key = (token, identity, self.unit)
dependency = assembly.acquire(key, self.instantiate,
(assembly, token, identity, instance))
if hashable:
self.cache[instance] = dependency
return dependency
def get(self, instance=None):
try:
return self.cache[instance]
except AttributeError:
hashable = False
except KeyError:
hashable = True
identity = None
token = None
assembly = Assembly.current()
if instance:
identity = '%s/%s' % (instance.__identity__, self.attr)
if identity in assembly.configuration:
token = identity
if not token:
if self.token:
token = self.token
#if token not in assembly.configuration and self.configuration_required:
# raise ConfigurationError(token)
if identity and not assembly.should_isolate(identity):
identity = None
else:
token = identity
key = (token, identity, self.unit)
dependency = assembly.acquire(key, self.instantiate, (assembly, token, identity, instance))
if hashable:
self.cache[instance] = dependency
return dependency
def get(self, instance=None):
try:
return self.cache[instance]
except KeyError:
pass
identity = None
token = None
assembly = Assembly.current()
if instance:
identity = '%s/%s' % (instance.__identity__, self.attr)
if identity in assembly.configuration:
token = identity
if not token:
if self.token:
token = self.token
if token not in assembly.configuration and self.configuration_required:
raise ConfigurationError(token)
if identity and not assembly.should_isolate(identity):
identity = None
else:
token = identity
key = (token, identity, self.unit)
self.cache[instance] = assembly.acquire(key, self.instantiate, (assembly, token, identity, instance))
return self.cache[instance]
def __call__(cls, *args, **params):
assembly = params.pop("__assembly__", None)
if not assembly:
assembly = Assembly.current()
identity = params.pop("__identity__", None)
token = params.pop("__token__", None)
if not token:
token = identity = cls.identity
signature = get_constructor_args(cls)
if args:
for i, argument in enumerate(args):
try:
name = signature[i]
if name not in params:
params[name] = argument
else:
raise TypeError("duplicate arguments")
except IndexError:
raise TypeError("too many arguments")
unit = cls.__new__(cls)
unit.__assembly__ = assembly
unit.__identity__ = identity
unit.__token__ = token
# log('debug', 'instantiating unit %s: token=%r, identity=%r',
# cls.identity, token, identity)
if cls.configuration:
configuration = cls.configuration.get(unit)
if params:
for name, value in params.items():
configuration[name] = value
if name not in signature:
del params[name]
for name in signature:
if name in configuration:
params[name] = configuration[name]
for dependency in cls.dependencies.itervalues():
if not dependency.deferred:
dependency.get(unit)
unit.__init__(**params)
return unit
def __call__(cls, *args, **params):
assembly = params.pop('__assembly__', None)
if not assembly:
assembly = Assembly.current()
identity = params.pop('__identity__', None)
token = params.pop('__token__', None)
if not token:
token = identity = cls.identity
signature = get_constructor_args(cls)
if args:
for i, argument in enumerate(args):
try:
name = signature[i]
if name not in params:
params[name] = argument
else:
raise TypeError('duplicate arguments')
except IndexError:
raise TypeError('too many arguments')
unit = cls.__new__(cls)
unit.__assembly__ = assembly
unit.__identity__ = identity
unit.__token__ = token
#log('debug', 'instantiating unit %s: token=%r, identity=%r',
# cls.identity, token, identity)
if cls.configuration:
configuration = cls.configuration.get(unit)
if params:
for name, value in params.items():
configuration[name] = value
if name not in signature:
del params[name]
for name in signature:
if name in configuration:
params[name] = configuration[name]
for dependency in cls.dependencies.itervalues():
if not dependency.deferred:
dependency.get(unit)
unit.__init__(**params)
return unit
