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histogram.go
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histogram.go
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package metric
import (
prom "github.com/prometheus/client_golang/prometheus"
"github.com/sjclijie/go-zero/core/proc"
)
type (
HistogramVecOpts struct {
Namespace string
Subsystem string
Name string
Help string
Labels []string
Buckets []float64
AppId string
Env string
Ip string
DataType string
}
HistogramVec interface {
Observe(v float64, labels ...string)
close() bool
}
promHistogramVec struct {
histogram *prom.HistogramVec
defaultLabelValues []string
}
)
func NewHistogramVec(cfg *HistogramVecOpts) HistogramVec {
if cfg == nil {
return nil
}
cfg.Labels = append(cfg.Labels, CommonLabel...)
vec := prom.NewHistogramVec(prom.HistogramOpts{
Namespace: cfg.Namespace,
Subsystem: cfg.Subsystem,
Name: cfg.Name,
Help: cfg.Help,
Buckets: cfg.Buckets,
}, cfg.Labels)
prom.MustRegister(vec)
defaultLabelValues := make([]string, 0)
defaultLabelValues = append(defaultLabelValues, prom.BuildFQName(cfg.Namespace, cfg.Subsystem, cfg.Name))
defaultLabelValues = append(defaultLabelValues, "histogram")
defaultLabelValues = append(defaultLabelValues, cfg.AppId)
defaultLabelValues = append(defaultLabelValues, cfg.Env)
defaultLabelValues = append(defaultLabelValues, cfg.Ip)
defaultLabelValues = append(defaultLabelValues, cfg.DataType)
hv := &promHistogramVec{
histogram: vec,
defaultLabelValues: defaultLabelValues,
}
proc.AddShutdownListener(func() {
hv.close()
})
return hv
}
func (hv *promHistogramVec) Observe(v float64, labels ...string) {
labels = append(labels, hv.defaultLabelValues...)
hv.histogram.WithLabelValues(labels...).Observe(v)
}
func (hv *promHistogramVec) close() bool {
return prom.Unregister(hv.histogram)
}