public object Handle(CreateComplexMeasurement command)
{
using (var session = _sessionFactory.OpenSession())
{
var baseMeasurement = session.QueryOver <Database.Sensor>()
.Where(x => x.Guid == command.BaseMeasurement).SingleOrDefault();
if (baseMeasurement == null)
{
throw new ArgumentException($"No sensor with id {command.BaseMeasurement} found");
}
using (var transaction = session.BeginTransaction())
{
var newComplex = new ComplexMetric()
{
Guid = Guid.NewGuid(),
Frequency = command.Frequency,
Sensor = baseMeasurement,
TimeStart = DateTime.Now,
WindowSize = command.Windowsize,
Description = command.Description
};
session.Save(newComplex);
transaction.Commit();
return(new object());
}
}
}
private SensorValue[] CountComplexValues(ComplexMetric metric, ValuesResponse simpleValues, ValuesQueryParameters parameters)
{
var values = new List <SensorValue>();
var windowSize = TimeSpan.FromMilliseconds(metric.WindowSize);
// TODO this can be optimized if needed
for (var valueDate = parameters.From;
valueDate < parameters.To;
valueDate += TimeSpan.FromMilliseconds(metric.Frequency))
{
var aggregateValues =
simpleValues.Values.Where(x => x.Timestamp < valueDate && x.Timestamp >= valueDate - windowSize);
if (!aggregateValues.Any())
{
continue;
}
var newValue = new SensorValue()
{
Value = aggregateValues.Select(x => x.Value).Average(),
Timestamp = valueDate
};
values.Add(newValue);
}
return(values.ToArray());
}
