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Implement WriteOnceScaled, from LogScaled #235

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Implement WriteOnceScaled, from LogScaled #235

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31 changes: 20 additions & 11 deletions writer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -15,9 +15,12 @@ func Write(r Registry, d time.Duration, w io.Writer) {
}
}

// WriteOnce sorts and writes metrics in the given registry to the given
// WriteOnceScaled sorts and writes metrics in the given registry to the given
// io.Writer.
func WriteOnce(r Registry, w io.Writer) {
func WriteOnceScaled(r Registry, w io.Writer, scale time.Duration) {
du := float64(scale)
duSuffix := scale.String()[1:]

var namedMetrics namedMetricSlice
r.Each(func(name string, i interface{}) {
namedMetrics = append(namedMetrics, namedMetric{name, i})
Expand Down Expand Up @@ -66,15 +69,15 @@ func WriteOnce(r Registry, w io.Writer) {
ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
fmt.Fprintf(w, "timer %s\n", namedMetric.name)
fmt.Fprintf(w, " count: %9d\n", t.Count())
fmt.Fprintf(w, " min: %9d\n", t.Min())
fmt.Fprintf(w, " max: %9d\n", t.Max())
fmt.Fprintf(w, " mean: %12.2f\n", t.Mean())
fmt.Fprintf(w, " stddev: %12.2f\n", t.StdDev())
fmt.Fprintf(w, " median: %12.2f\n", ps[0])
fmt.Fprintf(w, " 75%%: %12.2f\n", ps[1])
fmt.Fprintf(w, " 95%%: %12.2f\n", ps[2])
fmt.Fprintf(w, " 99%%: %12.2f\n", ps[3])
fmt.Fprintf(w, " 99.9%%: %12.2f\n", ps[4])
fmt.Fprintf(w, " min: %12.2f%s\n", float64(t.Min())/du, duSuffix)
fmt.Fprintf(w, " max: %12.2f%s\n", float64(t.Max())/du, duSuffix)
fmt.Fprintf(w, " mean: %12.2f%s\n", t.Mean()/du, duSuffix)
fmt.Fprintf(w, " stddev: %12.2f%s\n", t.StdDev()/du, duSuffix)
fmt.Fprintf(w, " median: %12.2f%s\n", ps[0]/du, duSuffix)
fmt.Fprintf(w, " 75%%: %12.2f%s\n", ps[1]/du, duSuffix)
fmt.Fprintf(w, " 95%%: %12.2f%s\n", ps[2]/du, duSuffix)
fmt.Fprintf(w, " 99%%: %12.2f%s\n", ps[3]/du, duSuffix)
fmt.Fprintf(w, " 99.9%%: %12.2f%s\n", ps[4]/du, duSuffix)
fmt.Fprintf(w, " 1-min rate: %12.2f\n", t.Rate1())
fmt.Fprintf(w, " 5-min rate: %12.2f\n", t.Rate5())
fmt.Fprintf(w, " 15-min rate: %12.2f\n", t.Rate15())
Expand All @@ -83,6 +86,12 @@ func WriteOnce(r Registry, w io.Writer) {
}
}

// WriteOnce sorts and writes metrics in the given registry to the given
// io.Writer.
func WriteOnce(r Registry, w io.Writer) {
WriteOnceScaled(r, w, time.Nanosecond)
}

type namedMetric struct {
name string
m interface{}
Expand Down