def _handle_pipeline_event(self, event):
"""
Pipeline Event handler function to convert incoming MQTT messages into the appropriate DPS
events, based on the topic of the message
"""
if isinstance(event, pipeline_events_mqtt.IncomingMQTTMessageEvent):
topic = event.topic
if mqtt_topic.is_dps_response_topic(topic):
logger.info(
"Received payload:{payload} on topic:{topic}".format(
payload=event.payload, topic=topic))
key_values = mqtt_topic.extract_properties_from_topic(topic)
status_code = mqtt_topic.extract_status_code_from_topic(topic)
request_id = key_values["rid"][0]
if event.payload is not None:
response = event.payload.decode("utf-8")
# Extract pertinent information from mqtt topic
# like status code request_id and send it upwards.
operation_flow.pass_event_to_previous_stage(
self,
pipeline_events_provisioning.RegistrationResponseEvent(
request_id, status_code, key_values, response),
)
else:
logger.warning(
"Unknown topic: {} passing up to next handler".format(
topic))
operation_flow.pass_event_to_previous_stage(self, event)
else:
# all other messages get passed up
operation_flow.pass_event_to_previous_stage(self, event)
def _handle_pipeline_event(self, event):
"""
Pipeline Event handler function to convert incoming MQTT messages into the appropriate DPS
events, based on the topic of the message
"""
if isinstance(event, pipeline_events_mqtt.IncomingMQTTMessageEvent):
topic = event.topic
if mqtt_topic.is_dps_response_topic(topic):
logger.info(
"Received payload:{payload} on topic:{topic}".format(
payload=event.payload, topic=topic))
key_values = mqtt_topic.extract_properties_from_topic(topic)
retry_after = mqtt_topic.get_optional_element(
key_values, "retry-after", 0)
status_code = mqtt_topic.extract_status_code_from_topic(topic)
request_id = key_values["rid"][0]
self.send_event_up(
pipeline_events_base.ResponseEvent(
request_id=request_id,
status_code=int(status_code, 10),
response_body=event.payload,
retry_after=retry_after,
))
else:
logger.warning(
"Unknown topic: {} passing up to next handler".format(
topic))
self.send_event_up(event)
else:
# all other messages get passed up
super(ProvisioningMQTTTranslationStage,
self)._handle_pipeline_event(event)