internal HealthCounts GetHealthCounts()
{
// we put an interval between snapshots so high-volume commands don't
// spend too much unnecessary time calculating metrics in very small time periods
long lastTime = this.lastHealthCountsSnapshot;
long currentTime = _clock.EllapsedTimeInMs;
if ( currentTime - lastTime >= this._properties.MetricsHealthSnapshotIntervalInMilliseconds.Get() || healthCountsSnapshot.IsEmpty)
{
if (Interlocked.CompareExchange(ref this.lastHealthCountsSnapshot, currentTime, lastTime) == lastTime)
{
long lastReset = _lastReset;
// our thread won setting the snapshot time so we will proceed with generating a new snapshot
// losing threads will continue using the old snapshot
long success = _counter.GetRollingSum(RollingNumberEvent.SUCCESS, lastReset);
long failure = _counter.GetRollingSum(RollingNumberEvent.FAILURE, lastReset); // fallbacks occur on this
long timeout = _counter.GetRollingSum(RollingNumberEvent.TIMEOUT, lastReset); // fallbacks occur on this
long threadPoolRejected = _counter.GetRollingSum(RollingNumberEvent.THREAD_POOL_REJECTED, lastReset); // fallbacks occur on this
long semaphoreRejected = _counter.GetRollingSum(RollingNumberEvent.SEMAPHORE_REJECTED, lastReset); // fallbacks occur on this
long shortCircuited = _counter.GetRollingSum(RollingNumberEvent.SHORT_CIRCUITED, lastReset); // fallbacks occur on this
long totalCount = failure + success + timeout + threadPoolRejected + shortCircuited + semaphoreRejected;
long errorCount = failure + timeout + threadPoolRejected + shortCircuited + semaphoreRejected;
int errorPercentage = 0;
if (totalCount > 0)
{
errorPercentage = (int)((double)errorCount / totalCount * 100);
}
healthCountsSnapshot = new HealthCounts(totalCount, errorCount, errorPercentage);
}
}
return healthCountsSnapshot;
}
internal void Reset()
{
Interlocked.Exchange(ref _lastReset, _clock.EllapsedTimeInMs);
healthCountsSnapshot = HealthCounts.Empty;
_counter.Reset();
}