def publish_activity_detection_event(self, user_id, activity_label):
'''Publish an activity detection event to kafka
user_id The user identity token as a string
activity_label A string representation of the activity label detected
'''
#Initialize and publish an activity detection event instance
event = ActivityDetectionEvent(user_id, activity_label)
self.producer.send_messages(KafkaEventsProducer.topic_activity_events, event.serialize())
def consume_activity_event(self, timeout=-1):
try:
msg = self.strategy.dispense_message(timeout)
assert(msg.topic == ActivityDetectionEventsConsumer.topic_activity_detection_events)
event = ActivityDetectionEvent.from_serialized(msg.value)
return event
except Queue.Empty:
pass
return None