Moved to google.golang.org/genproto/googleapis/api/annotations

Fixes #52

vendor/github.com/go-kit/kit/metrics/provider/prometheus.go

@@ -0,0 +1,63 @@
+package provider
+
+import (
+	stdprometheus "github.com/prometheus/client_golang/prometheus"
+
+	"github.com/go-kit/kit/metrics"
+	"github.com/go-kit/kit/metrics/prometheus"
+)
+
+type prometheusProvider struct {
+	namespace string
+	subsystem string
+}
+
+// NewPrometheusProvider returns a Provider that produces Prometheus metrics.
+// Namespace and subsystem are applied to all produced metrics.
+func NewPrometheusProvider(namespace, subsystem string) Provider {
+	return &prometheusProvider{
+		namespace: namespace,
+		subsystem: subsystem,
+	}
+}
+
+// NewCounter implements Provider via prometheus.NewCounterFrom, i.e. the
+// counter is registered. The metric's namespace and subsystem are taken from
+// the Provider. Help is set to the name of the metric, and no const label names
+// are set.
+func (p *prometheusProvider) NewCounter(name string) metrics.Counter {
+	return prometheus.NewCounterFrom(stdprometheus.CounterOpts{
+		Namespace: p.namespace,
+		Subsystem: p.subsystem,
+		Name:      name,
+		Help:      name,
+	}, []string{})
+}
+
+// NewGauge implements Provider via prometheus.NewGaugeFrom, i.e. the gauge is
+// registered. The metric's namespace and subsystem are taken from the Provider.
+// Help is set to the name of the metric, and no const label names are set.
+func (p *prometheusProvider) NewGauge(name string) metrics.Gauge {
+	return prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
+		Namespace: p.namespace,
+		Subsystem: p.subsystem,
+		Name:      name,
+		Help:      name,
+	}, []string{})
+}
+
+// NewGauge implements Provider via prometheus.NewSummaryFrom, i.e. the summary
+// is registered. The metric's namespace and subsystem are taken from the
+// Provider. Help is set to the name of the metric, and no const label names are
+// set. Buckets are ignored.
+func (p *prometheusProvider) NewHistogram(name string, _ int) metrics.Histogram {
+	return prometheus.NewSummaryFrom(stdprometheus.SummaryOpts{
+		Namespace: p.namespace,
+		Subsystem: p.subsystem,
+		Name:      name,
+		Help:      name,
+	}, []string{})
+}
+
+// Stop implements Provider, but is a no-op.
+func (p *prometheusProvider) Stop() {}