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47 lines
1.3 KiB
47 lines
1.3 KiB
package evidence
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import (
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"github.com/go-kit/kit/metrics"
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"github.com/go-kit/kit/metrics/discard"
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"github.com/go-kit/kit/metrics/prometheus"
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stdprometheus "github.com/prometheus/client_golang/prometheus"
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)
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const (
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// MetricsSubsystem is a subsystem shared by all metrics exposed by this
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// package.
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MetricsSubsystem = "evidence_pool"
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)
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// Metrics contains metrics exposed by this package.
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// see MetricsProvider for descriptions.
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type Metrics struct {
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// Number of evidence in the evidence pool
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NumEvidence metrics.Gauge
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}
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// PrometheusMetrics returns Metrics build using Prometheus client library.
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// Optionally, labels can be provided along with their values ("foo",
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// "fooValue").
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func PrometheusMetrics(namespace string, labelsAndValues ...string) *Metrics {
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labels := []string{}
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for i := 0; i < len(labelsAndValues); i += 2 {
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labels = append(labels, labelsAndValues[i])
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}
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return &Metrics{
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NumEvidence: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
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Namespace: namespace,
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Subsystem: MetricsSubsystem,
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Name: "num_evidence",
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Help: "Number of pending evidence in evidence pool.",
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}, labels).With(labelsAndValues...),
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}
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}
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// NopMetrics returns no-op Metrics.
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func NopMetrics() *Metrics {
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return &Metrics{
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NumEvidence: discard.NewGauge(),
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}
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}
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