def value_at(self, time):
result = self.source.db.view('energy_data/by_source_and_time',
startkey=[self._feed_name],
endkey=self._key(time))
if len(result):
return self._to_point(result.first()['value'])
else:
return energykit.DataPoint()
def callback(change):
doc = change['doc']
time = energykit.Time.from_ms(doc['timestamp'])
for key in self._datastreams:
if key in doc:
source = self.get_stream_by_key((doc['source'], key))
value = doc[key]
datapoint = energykit.DataPoint(time, value)
self.publish(datapoint, source)
def _to_point(self, value):
time = energykit.Time.from_json(value[self.source._at_idx])
value = value[self.source._datastream_idx[self._name]]
return energykit.DataPoint(time, value)
def to_point(v): t = energykit.Time.from_ms(v[0]) return energykit.DataPoint(t, self.stream._to_value(v[1], t))
def get_datapoint(self):
return energykit.DataPoint(self._time, self._value)