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import datetime |
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import logging |
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from app.database import db |
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from app.models import Sample, Sensor |
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logger = logging.getLogger(__name__) |
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10
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def add_new_sample(sensor_id, dt, svalue, deltaminutes=10): |
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""" |
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Adds a new sample with an associacted remote sensor |
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if there hasn't been a sample recorded within the last deltaminutes |
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(default is 10). |
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Arguments: |
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sensor_id (int): Primary key for sensor |
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dt (datetime): Datetime of sample |
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svalue (float): Value of sample |
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""" |
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delta = datetime.datetime.now() - datetime.timedelta(minutes=deltaminutes) |
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sample = Sample.query.filter_by(sensor_id=sensor_id)\ |
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.order_by(Sample.datetime.desc()).first() |
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if sample is None or (sample.datetime < delta and |
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(sample.datetime != dt.replace(tzinfo=None))): |
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new_sample = Sample(sensor_id=sensor_id, |
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value=svalue, |
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datetime=dt) |
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db.session.add(new_sample) |
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db.session.commit() |
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logger.debug('Saved sample (%s - %s - %s) for sensor %s', |
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new_sample.id, |
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svalue, |
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dt, |
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sensor_id) |
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else: |
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message = '' |
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if sample.datetime == dt.replace(tzinfo=None): |
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message = message + 'Sample times are the same. ' |
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if sample.datetime < delta: |
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message = message + 'Last sample was more than {0} min ago '.format(deltaminutes) |
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else: |
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message = message + 'Last sample was less than {0} min ago '.format(deltaminutes) |
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logger.warning('Discarded sample (%s - %s) for sensor %s, compared to (%s - %s). %s', |
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svalue, |
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dt, |
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sensor_id, |
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sample.value, |
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sample.datetime, |
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message) |
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class RemoteGage(object): |
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""" |
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Base abstraction of the gage updating process |
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""" |
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def sensor(self, sensor_id): |
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""" |
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Returns selected sensor object |
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""" |
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return Sensor.query.get(sensor_id) |
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def get_sample(self, sensor_id): |
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""" |
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Get a single sample and save latest values |
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""" |
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raise NotImplementedError |
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def get_multiple_samples(self, sensor_ids): |
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""" |
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Smartly get multiple samples if possible and save latest values |
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""" |
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for sensor_id in sensor_ids: |
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self.get_sample(sensor_id) |
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abkfenris /
gage-web
