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67 lines
1.3 KiB
Go
67 lines
1.3 KiB
Go
package metric
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import (
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prom "github.com/prometheus/client_golang/prometheus"
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"github.com/zeromicro/go-zero/core/proc"
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"github.com/zeromicro/go-zero/core/prometheus"
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)
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type (
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// A HistogramVecOpts is a histogram vector options.
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HistogramVecOpts struct {
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Namespace string
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Subsystem string
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Name string
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Help string
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Labels []string
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Buckets []float64
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}
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// A HistogramVec interface represents a histogram vector.
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HistogramVec interface {
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// Observe adds observation v to labels.
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Observe(v int64, labels ...string)
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close() bool
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}
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promHistogramVec struct {
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histogram *prom.HistogramVec
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}
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)
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// NewHistogramVec returns a HistogramVec.
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func NewHistogramVec(cfg *HistogramVecOpts) HistogramVec {
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if cfg == nil {
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return nil
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}
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vec := prom.NewHistogramVec(prom.HistogramOpts{
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Namespace: cfg.Namespace,
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Subsystem: cfg.Subsystem,
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Name: cfg.Name,
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Help: cfg.Help,
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Buckets: cfg.Buckets,
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}, cfg.Labels)
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prom.MustRegister(vec)
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hv := &promHistogramVec{
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histogram: vec,
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}
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proc.AddShutdownListener(func() {
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hv.close()
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})
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return hv
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}
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func (hv *promHistogramVec) Observe(v int64, labels ...string) {
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if !prometheus.Enabled() {
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return
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}
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hv.histogram.WithLabelValues(labels...).Observe(float64(v))
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}
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func (hv *promHistogramVec) close() bool {
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return prom.Unregister(hv.histogram)
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}
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