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package prometheus
import (
"github.com/go-kratos/kratos/v2/metrics"
"github.com/prometheus/client_golang/prometheus"
)
var _ metrics.Gauge = (*gauge)(nil)
type gauge struct {
gv *prometheus.GaugeVec
lvs []string
}
// NewGauge new a prometheus gauge and returns Gauge.
func NewGauge(gv *prometheus.GaugeVec) metrics.Gauge {
return &gauge{
gv: gv,
}
}
func (g *gauge) With(lvs ...string) metrics.Gauge {
return &gauge{
gv: g.gv,
lvs: lvs,
}
}
func (g *gauge) Set(value float64) {
g.gv.WithLabelValues(g.lvs...).Set(value)
}
func (g *gauge) Add(delta float64) {
g.gv.WithLabelValues(g.lvs...).Add(delta)
}
func (g *gauge) Sub(delta float64) {
g.gv.WithLabelValues(g.lvs...).Sub(delta)
}