public void Time(Action action, string userValue = null)
{
var start = this.clock.Nanoseconds;
try
{
counter.Increment();
action();
}
finally
{
counter.Decrement();
Record(this.clock.Nanoseconds - start, TimeUnit.Nanoseconds, userValue);
}
}
private void Update(long value, long timestamp)
{
[email protected]();
try
{
long age = timestamp - startTime.Value;
double weighted = Math.Exp(alpha * age);
double priority = weighted / ThreadLocalRandom.NextDouble();
long newCount = count.Increment();
if (newCount <= size)
{
values.AddOrUpdate(priority, value, (k, v) => value);
}
else
{
var first = values.First().Key;
if (first < priority)
{
this.values.AddOrUpdate(priority, value, (k, v) => v);
long removed;
// ensure we always remove an item
while (!values.TryRemove(first, out removed))
{
first = values.First().Key;
}
}
}
}
finally
{
[email protected]();
}
}