class AirMonitorEngine(object):
def __init__(self, smog_meter, target, callback, period):
self.metrics = Metrics()
self.smog_meter = smog_meter
self.callback = callback
self.last_averages = None
self.target = target
self._period_minutes = float(period)
self._time_of_last_update = time.time()
def __del__(self):
pass
def probe(self):
pollutants = self.smog_meter.get_values()
if pollutants is None:
return
self.metrics.add_measurement(pollutants)
seconds_in_minute = 60
now = time.time()
time_elapsed = (now - self._time_of_last_update)
period_seconds = seconds_in_minute * self._period_minutes
if time_elapsed > period_seconds:
self.last_averages = self.metrics.average()
self.target.submit(self.last_averages)
self._time_of_last_update = time.time()
result = PollutantsResult(pollutants, self.last_averages)
self.callback(result)
