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recorder.go
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recorder.go
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package metrics
import (
"sort"
"time"
)
type FloatMetricsRecorder struct {
min float64
max float64
sum float64
count uint64
values []float64
buckets map[float64]uint64
}
func NewFloatMetricsRecorder(buckets ...float64) *FloatMetricsRecorder {
bucketsMap := make(map[float64]uint64, len(buckets))
for _, bucket := range buckets {
bucketsMap[bucket] = 0
}
return &FloatMetricsRecorder{
values: make([]float64, 0, 10),
buckets: bucketsMap,
}
}
func NewDefaultJobDurationMetricsRecorder() *FloatMetricsRecorder {
return NewFloatMetricsRecorder(
(time.Minute).Seconds(),
(time.Minute * 10).Seconds(),
(time.Minute * 30).Seconds(),
(time.Hour).Seconds(),
(time.Hour * 3).Seconds(),
(time.Hour * 12).Seconds(),
(time.Hour * 24).Seconds(),
(time.Hour * 24 * 2).Seconds(),
(time.Hour * 24 * 7).Seconds())
}
func (d *FloatMetricsRecorder) Record(value float64) {
if d.count == 0 || value < d.min {
d.min = value
}
if d.count == 0 || value > d.max {
d.max = value
}
d.count++
d.sum += value
d.values = append(d.values, value)
for bucket := range d.buckets {
if value <= bucket {
d.buckets[bucket]++
}
}
}
func (d *FloatMetricsRecorder) calculateMedian() float64 {
if len(d.values) == 0 {
return 0
}
sort.Float64s(d.values)
medianPosition := len(d.values) / 2
if len(d.values)%2 != 0 {
return d.values[medianPosition]
}
return (d.values[medianPosition-1] + d.values[medianPosition]) / 2
}
func (d *FloatMetricsRecorder) GetMetrics() *FloatMetrics {
copyBuckets := make(map[float64]uint64, len(d.buckets))
for key, value := range d.buckets {
copyBuckets[key] = value
}
return &FloatMetrics{
min: d.min,
max: d.max,
median: d.calculateMedian(),
sum: d.sum,
count: d.count,
buckets: copyBuckets,
}
}
type FloatMetrics struct {
min float64
max float64
median float64
sum float64
count uint64
buckets map[float64]uint64
}
func (d *FloatMetrics) GetMin() float64 {
return d.min
}
func (d *FloatMetrics) GetMax() float64 {
return d.max
}
func (d *FloatMetrics) GetMedian() float64 {
return d.median
}
func (d *FloatMetrics) GetCount() uint64 {
return d.count
}
func (d *FloatMetrics) GetSum() float64 {
return d.sum
}
func (d *FloatMetrics) GetBuckets() map[float64]uint64 {
copyBuckets := make(map[float64]uint64, len(d.buckets))
for key, value := range d.buckets {
copyBuckets[key] = value
}
return copyBuckets
}