private void UpdateCache(Telegram telegram, decimal current)
{
var entry = new GasFlowCacheEntry {
Timestamp = telegram.GasTimestamp,
Value = telegram.GasConsumption,
LastGasFlowResult = current
};
this.m_telegrams.AddOrUpdate(telegram.SerialNumberGasMeter, entry, (serial, oldValue) => entry);
}
private decimal ComputePerMinute(GasFlowCacheEntry old, Telegram @new)
{
if (@new.GasTimestamp == old.Timestamp)
{
return(old.LastGasFlowResult);
}
var diff = @new.GasTimestamp.Subtract(old.Timestamp);
var usage = @new.GasConsumption - old.Value;
if (usage < 0)
{
this.m_logger.Warn("New gas m3 lower than previously received. Are telegrams being received out of order?");
return(0M);
}
return(usage / Convert.ToDecimal(diff.TotalMinutes));
}
