69 lines
1.6 KiB
Go
69 lines
1.6 KiB
Go
package metrics
|
|
|
|
import (
|
|
"time"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
// StartTimer begins a timer observation at the callsite. When the target
|
|
// operation is completed, the caller should call the return done func().
|
|
func StartTimer(timer Timer) (done func()) {
|
|
start := time.Now()
|
|
return func() {
|
|
timer.Update(time.Since(start))
|
|
}
|
|
}
|
|
|
|
// Timer is a metric that allows collecting the duration of an action in seconds
|
|
type Timer interface {
|
|
// Update records an observation, duration, and converts to the target
|
|
// units.
|
|
Update(duration time.Duration)
|
|
|
|
// UpdateSince will add the duration from the provided starting time to the
|
|
// timer's summary with the precisions that was used in creation of the timer
|
|
UpdateSince(time.Time)
|
|
}
|
|
|
|
// LabeledTimer is a timer that must have label values populated before use.
|
|
type LabeledTimer interface {
|
|
WithValues(labels ...string) Timer
|
|
}
|
|
|
|
type labeledTimer struct {
|
|
m *prometheus.HistogramVec
|
|
}
|
|
|
|
func (lt *labeledTimer) WithValues(labels ...string) Timer {
|
|
return &timer{m: lt.m.WithLabelValues(labels...)}
|
|
}
|
|
|
|
func (lt *labeledTimer) Describe(c chan<- *prometheus.Desc) {
|
|
lt.m.Describe(c)
|
|
}
|
|
|
|
func (lt *labeledTimer) Collect(c chan<- prometheus.Metric) {
|
|
lt.m.Collect(c)
|
|
}
|
|
|
|
type timer struct {
|
|
m prometheus.Histogram
|
|
}
|
|
|
|
func (t *timer) Update(duration time.Duration) {
|
|
t.m.Observe(duration.Seconds())
|
|
}
|
|
|
|
func (t *timer) UpdateSince(since time.Time) {
|
|
t.m.Observe(time.Since(since).Seconds())
|
|
}
|
|
|
|
func (t *timer) Describe(c chan<- *prometheus.Desc) {
|
|
t.m.Describe(c)
|
|
}
|
|
|
|
func (t *timer) Collect(c chan<- prometheus.Metric) {
|
|
t.m.Collect(c)
|
|
}
|