micro-meter-prometheus/histogram.go

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package prometheus
import (
"sync/atomic"
"time"
dto "github.com/prometheus/client_model/go"
)
type prometheusHistogram struct {
name string
c *dto.Metric
}
func (c prometheusHistogram) Reset() {
}
func (c prometheusHistogram) Update(n float64) {
atomic.AddUint64(c.c.Histogram.SampleCount, 1)
addFloat64(c.c.Histogram.SampleSum, n)
for _, b := range c.c.Histogram.Bucket {
if n > *b.UpperBound {
continue
}
atomic.AddUint64(b.CumulativeCount, 1)
}
}
func (c prometheusHistogram) UpdateDuration(n time.Time) {
x := time.Since(n).Seconds()
atomic.AddUint64(c.c.Histogram.SampleCount, 1)
addFloat64(c.c.Histogram.SampleSum, x)
for _, b := range c.c.Histogram.Bucket {
if x > *b.UpperBound {
continue
}
atomic.AddUint64(b.CumulativeCount, 1)
}
}