def lookup(self, request: Request) -> List[Callable[[], Handler]]:
"""
Looks up the handler associated with a request - matches the key on the request to a registered handler
:param request: The request we want to find a handler for
:return:
"""
key = request.__class__.__name__
if key not in self._registry:
if request.is_command():
raise ConfigurationException("There is no handler registered for this request")
elif request.is_event():
return [] # type: Callable[[] Handler]
return self._registry[key]
def lookup(self, request: Request) -> List[Callable[[], Handler]]:
"""
Looks up the handler associated with a request - matches the key on the request to a registered handler
:param request: The request we want to find a handler for
:return:
"""
key = request.__class__.__name__
if key not in self._registry:
if request.is_command():
raise ConfigurationException(
"There is no handler registered for this request")
elif request.is_event():
return [] # type: Callable[[] Handler]
return self._registry[key]
def register(self, request_class: Request, handler_factory: Callable[[], Handler]) -> None:
"""
Register the handler for the command
:param request_class: The command or event to dispatch. It must implement getKey()
:param handler_factory: A factory method to create the handler to dispatch to
:return:
"""
key = request_class.__name__
is_command = request_class.is_command()
is_event = request_class.is_event()
is_present = key in self._registry
if is_command and is_present:
raise ConfigurationException("A handler for this request has already been registered")
elif is_event and is_present:
self._registry[key].append(handler_factory)
elif is_command or is_event:
self._registry[key] = [handler_factory]
def register(self, request_class: Request,
handler_factory: Callable[[], Handler]) -> None:
"""
Register the handler for the command
:param request_class: The command or event to dispatch. It must implement getKey()
:param handler_factory: A factory method to create the handler to dispatch to
:return:
"""
key = request_class.__name__
is_command = request_class.is_command()
is_event = request_class.is_event()
is_present = key in self._registry
if is_command and is_present:
raise ConfigurationException(
"A handler for this request has already been registered")
elif is_event and is_present:
self._registry[key].append(handler_factory)
elif is_command or is_event:
self._registry[key] = [handler_factory]