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());
}
public bool TryGet(ValuesQueryParameters parameters, out ValuesResponse values)
{
using (var session = _sessionFactory.OpenSession())
{
var metric = session.QueryOver <ComplexMetric>()
.Where(x => x.Guid == parameters.Id)
.SingleOrDefault();
if (metric == null)
{
values = null;
return(false);
}
var simpleValues = _simpleValuesRetriever.GetSimpleMetric(
new ValuesQueryParameters
{
Id = metric.Sensor.Guid,
From = parameters.From - TimeSpan.FromMilliseconds(metric.WindowSize),
To = parameters.To
}, session);
var complexValues = CountComplexValues(metric, simpleValues, parameters);
values = new ValuesResponse
{
Measurements = _pathBuilder.CreateForSensor(parameters.Id),
Values = complexValues
};
return(true);
}
}
