def __init__(self, **kwargs):
self.id = kwargs.get("id", None)
self.type = kwargs.get("type")
self.source = kwargs.get("source")
self.target = kwargs.get("target")
self.timestamp = kwargs.get("timestamp", date_time_utils.timestamp())
self.data = kwargs.get("data", {})
self.received_timestamp = kwargs.get("received_timestamp", None)
def parse_message(self, message_body):
message_json = json.loads(message_body)
now = date_time_utils.timestamp()
#Required fields
id = message_json["id"]
source = message_json['source']
type = message_json['type']
#Optional fields
target = message_json.get('target')
timestamp = message_json.get('timestamp', now)
received_timestamp = message_json.get('received_timestamp', now)
data = message_json.get('data', {})
return Message(id=id, source=source, type=type, target=target, data=data, timestamp=timestamp, received_timestamp=received_timestamp)
def __init__(self, mqtt_host, mqtt_port, mqtt_topic="messagebus"):
self.logger = logging.getLogger(__name__)
self.subscriptions = []
self.counter = date_time_utils.timestamp()
self._thread_constructor = threading.Thread
self.logger.debug("Message bus initialized")
self.mqtt_client = mqtt.Client(client_id="messagebus-backend", clean_session=False)
self.mqtt_host = mqtt_host
self.mqtt_port = mqtt_port
self.mqtt_topic = mqtt_topic
self.mqtt_client.on_connect = self.on_connect
self.mqtt_client.on_disconnect = self.on_disconnect
self.mqtt_client.on_message = self.on_message
self.mqtt_client.on_subscribe = self.on_subscribe
self.connected = False
