def sensor_data_state_change(sender, instance, *args, **kwargs):
"""
Send Sensor Data notifications
- If the state of a sensor changed with this save, send out a notification.
"""
if instance.state_changed:
if instance.sensor.state:
# Recovered
send_notification(instance.sensor, instance, "recovered")
else:
# Failed
send_notification(instance.sensor, instance, "alert")
def handle(self, *args, **options):
sensors = Sensor.objects.all()
for sensor in sensors:
print sensor
down = False
# Get last sensor data entry
data = SensorData.objects.filter(
sensor=sensor).order_by("-datetime")[0:1]
nowtz = timezone.make_aware(datetime.now())
delta = timedelta(minutes=settings.SENSOR_DOWN_AFTER_MINUTES)
old_before_datetime = nowtz - delta
if data and data[0]:
since = str(data[0].datetime)
else:
since = "???"
# If the data is there, how old is it?
if len(data) > 0 and data[0].datetime < old_before_datetime:
# Data is old, device is down.
down = True
elif sensor.create_date < old_before_datetime:
# Device is not a new one, device is down.
down = True
if down and not sensor.down:
print " - sending alert, down %s - %s" % (sensor, since)
try:
send_notification(sensor, data[0], "down")
except KeyError:
# If data[0] doesn't exist, the sensor doesn't have any
# active data anyway, and we probably don't care.
pass
sensor.down = True
sensor.save()
elif sensor.down:
print " - sensor already down %s" % sensor
else:
print " + still up %s - %s" % (sensor, since)
def handle(self, *args, **options):
sensors = Sensor.objects.all()
for sensor in sensors:
print sensor
down = False
# Get last sensor data entry
data = SensorData.objects.filter(sensor=sensor).order_by("-datetime")[0:1]
nowtz = timezone.make_aware(datetime.now())
delta = timedelta(minutes=settings.SENSOR_DOWN_AFTER_MINUTES)
old_before_datetime = nowtz - delta
if data and data[0]:
since = str(data[0].datetime)
else:
since = "???"
# If the data is there, how old is it?
if len(data) > 0 and data[0].datetime < old_before_datetime:
# Data is old, device is down.
down = True
elif sensor.create_date < old_before_datetime:
# Device is not a new one, device is down.
down = True
if down and not sensor.down:
print " - sending alert, down %s - %s" % (sensor, since)
try:
send_notification(sensor, data[0], "down")
except KeyError:
# If data[0] doesn't exist, the sensor doesn't have any
# active data anyway, and we probably don't care.
pass
sensor.down = True
sensor.save()
elif sensor.down:
print " - sensor already down %s" % sensor
else:
print " + still up %s - %s" % (sensor, since)
