73 lines
1.3 KiB
Go
73 lines
1.3 KiB
Go
package metrics
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import "github.com/prometheus/client_golang/prometheus"
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// Gauge is a metric that allows incrementing and decrementing a value
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type Gauge interface {
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Inc(...float64)
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Dec(...float64)
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// Add adds the provided value to the gauge's current value
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Add(float64)
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// Set replaces the gauge's current value with the provided value
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Set(float64)
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}
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// LabeledGauge describes a gauge the must have values populated before use.
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type LabeledGauge interface {
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WithValues(labels ...string) Gauge
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}
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type labeledGauge struct {
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pg *prometheus.GaugeVec
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}
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func (lg *labeledGauge) WithValues(labels ...string) Gauge {
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return &gauge{pg: lg.pg.WithLabelValues(labels...)}
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}
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func (lg *labeledGauge) Describe(c chan<- *prometheus.Desc) {
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lg.pg.Describe(c)
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}
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func (lg *labeledGauge) Collect(c chan<- prometheus.Metric) {
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lg.pg.Collect(c)
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}
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type gauge struct {
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pg prometheus.Gauge
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}
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func (g *gauge) Inc(vs ...float64) {
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if len(vs) == 0 {
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g.pg.Inc()
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}
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g.Add(sumFloat64(vs...))
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}
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func (g *gauge) Dec(vs ...float64) {
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if len(vs) == 0 {
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g.pg.Dec()
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}
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g.Add(-sumFloat64(vs...))
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}
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func (g *gauge) Add(v float64) {
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g.pg.Add(v)
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}
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func (g *gauge) Set(v float64) {
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g.pg.Set(v)
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}
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func (g *gauge) Describe(c chan<- *prometheus.Desc) {
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g.pg.Describe(c)
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}
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func (g *gauge) Collect(c chan<- prometheus.Metric) {
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g.pg.Collect(c)
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}
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