def check_duplicate_message(self, message_data):
"""AMQP consumers may read same message twice when exceptions occur
before ack is returned. This method prevents doing it.
"""
if UNIQUE_ID in message_data:
msg_id = message_data.pop(UNIQUE_ID)
if msg_id not in self.prev_msgids:
self.prev_msgids.append(msg_id)
else:
raise rpc_common.DuplicateMessageError(msg_id=msg_id)
def check_duplicate_message(self, message_data):
"""AMQP consumers may read same message twice when exceptions occur
before ack is returned. This method prevents doing it.
"""
try:
msg_id = message_data.pop(UNIQUE_ID)
except KeyError:
return
if msg_id in self.prev_msgids:
raise rpc_common.DuplicateMessageError(msg_id=msg_id)
return msg_id