public DataTransferTracker(long minutes, LogHandler logHandler)
{
if (minutes < 1)
{
throw new System.ArgumentOutOfRangeException("The number of minutes ago the track starts cannot be less than 1");
}
minutesIntoPast = minutes;
// find the data transfer over the period
setStartInstantValues(logHandler);
DataTransferInstant currentInstant = logHandler.getDataInstant(DateTime.UtcNow.Ticks);
bytesIn = currentInstant.bytesIn - startInstant.bytesIn;
bytesOut = currentInstant.bytesOut - startInstant.bytesOut;
// initialise the seconds
second = 0;
for (byte s = 0; s < 60; s++)
seconds[s] = new DataTransferLump(0, 0);
}
/// <summary>
/// Loads the values regarding the start instant for the tracker
/// </summary>
/// <param name="logHandler"></param>
private void setStartInstantValues(LogHandler logHandler)
{
startInstant = logHandler.getDataInstant(ticksAtStartPoint());
// try looking slightly after a minute ahead to account for any delays in saving
minuteAfterStartInstant = logHandler.getDataInstant(ticksAtStartPoint() + (long)(TimeSpan.TicksPerMinute * 0.98));
// work out how many bytes change should be made each second so there's no sudden jump when the minute changes
long inDiff = minuteAfterStartInstant.bytesIn - startInstant.bytesIn;
long outDiff = minuteAfterStartInstant.bytesOut - startInstant.bytesOut;
if (inDiff < 0)
{
inDiff = -inDiff;
}
if (outDiff < 0)
{
outDiff = -outDiff;
}
bytesStartPerSecond.bytesIn = inDiff / 60;
bytesStartPerSecond.bytesOut = outDiff / 60;
bytesStartLeftover.bytesIn = inDiff - bytesStartPerSecond.bytesIn * 60;
bytesStartLeftover.bytesOut = outDiff - bytesStartPerSecond.bytesOut * 60;
}