/// <summary>
/// Specify that some bytes were transferred in a particular window.
/// </summary>
/// <param name="window">Number representing time, e.g. 1 = 100ms to 200ms, 2 = 200ms to 300ms, etc</param>
/// <param name="value">Count of bytes transferred</param>
public void Accumulate(long window, long value)
{
if (window < 0)
{
throw new ArgumentOutOfRangeException("window");
}
// Special case: initialize the top window on the first call to Accumulate()
if (currentWindow == -1)
{
currentWindow = window;
}
// If trying to accumulate old data, put it in the current window
if (window < currentWindow)
{
window = currentWindow;
}
// If these bytes are not in the current window, put the total bytes transferred
// in the current window to the previous bytes queue
if (window > currentWindow)
{
previousBytesTransferred.Add(currentBytesAccumulator.Total());
currentBytesAccumulator.Clear();
currentWindow++;
}
// If there is a gap between the current window and this window, enqueue
// the appropriate number of empty windows
if (window != currentWindow)
{
previousBytesTransferred.AddN(window - currentWindow);
currentWindow = window;
}
// finally accumulate the bytes transferred
currentBytesAccumulator.Accumulate(value);
}
public void TestAddN()
{
var a = new AccumulatingCircularBuffer <long, long>(3, new SumAccumulator());
CheckBuffer(a, new long[] { }, 0);
a.AddN(0);
CheckBuffer(a, new long[] { }, 0);
a.AddN(1);
CheckBuffer(a, new long[] { 0 }, 0);
a.Add(10);
a.Add(20);
a.Add(30);
CheckBuffer(a, new long[] { 10, 20, 30 }, 60);
a.AddN(1);
CheckBuffer(a, new long[] { 20, 30, 0 }, 50);
a.Add(10);
a.Add(20);
a.Add(30);
CheckBuffer(a, new long[] { 10, 20, 30 }, 60);
a.AddN(2);
CheckBuffer(a, new long[] { 30, 0, 0 }, 30);
a.Add(10);
a.Add(20);
a.Add(30);
CheckBuffer(a, new long[] { 10, 20, 30 }, 60);
a.AddN(3);
CheckBuffer(a, new long[] { 0, 0, 0 }, 0);
// Test that adding a huge number is optimised away
a.Add(10);
a.Add(20);
a.Add(30);
CheckBuffer(a, new long[] { 10, 20, 30 }, 60);
a.AddN(long.MaxValue);
CheckBuffer(a, new long[] { 0, 0, 0 }, 0);
}