func recordOutcome(counter metrics.Counter, latency metrics.Histogram, duration time.Duration, err error, success, failure map[string]string) {
labels := success
if err != nil {
labels = failure
}
counter.Increment(labels)
latency.Add(labels, float64(duration/time.Microsecond))
}
ReportablePercentiles: []float64{0.01, 0.05, 0.5, 0.9, 0.99},
})
var requestLatencyEqualTallying *metrics.Histogram = metrics.CreateHistogram(&metrics.HistogramSpecification{
Starts: requestLatencyEqualBuckets,
BucketMaker: metrics.TallyingBucketBuilder,
ReportablePercentiles: []float64{0.01, 0.05, 0.5, 0.9, 0.99},
})
/*
This callback accumulates the microsecond duration of the reporting framework's
overhead such that it can be reported.
*/
var requestLatencyAccumulator metrics.CompletionCallback = func(duration time.Duration) {
microseconds := float64(int64(duration) / 1E3)
requestLatencyLogarithmicAccumulating.Add(microseconds)
requestLatencyEqualAccumulating.Add(microseconds)
requestLatencyLogarithmicTallying.Add(microseconds)
requestLatencyEqualTallying.Add(microseconds)
}
/*
Registry is, as the name implies, a registrar where metrics are listed.
In most situations, using DefaultRegistry is sufficient versus creating one's
own.
*/
type Registry struct {
mutex sync.RWMutex
NameToMetric map[string]metrics.Metric
}