code: def request_uplink_info(self, context, agent):
          
  
          LOG.debug('request_uplink_info from %(agent)s', {'agent': agent})
  
          # Add the request into queue for processing.
          event_type = 'agent.request.uplink'
          payload = {'agent': agent}
          timestamp = time.ctime()
          data = (event_type, payload)
          pri = self.obj.PRI_LOW_START + 1
          self.obj.pqueue.put((pri, timestamp, data))
          LOG.debug('Added request uplink info into queue.')
  
          return 0
docs: Process uplink message from an agent.