async def on_receive(self, message: FIXMessage) -> FIXMessage:
"""
Calls the relevant on_<message_type> handler for this type of message, or 'on_unhandled' if no
handler has been defined.
:param message: The message to process
:return: The result after processing the on_<message_type> method.
:raises: MessageProcessingError if the handler does not return a valid FIX message.
"""
handler = self.type_handlers.get(message.type, self.on_unhandled)
message = await handler(message)
if message is None:
raise MessageProcessingError(
f"{self.name}: message handler '{handler.__name__}' did not provide a message to propagate "
f"further up the pipeline. Perhaps you forgot to return a message instance in "
f"{self.__module__}.{self.__class__.__name__}.{handler.__name__}?"
)
return message
async def on_receive(self, data: bytes) -> FIXMessage:
try:
return self.decode_message(data)
except Exception as e:
raise MessageProcessingError() from e