def application_broadcast_topic_router()

in src/main.py [0:0]


    def application_broadcast_topic_router(self, message_id, reqres, command, message):
        '''
            Route PubSub messages to this components Application Broadcast topic.
            
            Here you can route messages to this or an external module based on the 
            increasingly specific detail provided in the request/response 
            and command message fields as prescribed in this AWS Greengrass SDK
            (see pubsub_message.py).

            In this example we just route to a message processor based on request/response type. 
        '''

        if reqres == 'request':
            self.application_broadcast_topic_request(message_id, command, message)

        elif reqres == 'response':
            self.application_broadcast_topic_response(message_id, command, message)