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wrapper.go
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wrapper.go
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package bprometheus
import (
"context"
"errors"
"github.com/go-masonry/mortar/interfaces/monitor"
"github.com/prometheus/client_golang/prometheus"
)
var (
errInvalidMetricType = errors.New("invalid metric type")
)
type promWrapper struct {
namespace string
predefinedCollectors []prometheus.Collector
}
func newPromWrapper(cfg *promConfig) monitor.BricksReporter {
return &promWrapper{
namespace: cfg.namespace,
predefinedCollectors: cfg.predefinedCollectors,
}
}
func (p *promWrapper) Connect(ctx context.Context) error {
// Register all predefined Collectors
for _, collector := range p.predefinedCollectors {
if err := prometheus.Register(collector); err != nil {
return err
}
}
return nil
}
func (p *promWrapper) Close(ctx context.Context) error {
return nil
}
func (p *promWrapper) Metrics() monitor.BricksMetrics {
return p
}
func (p *promWrapper) Counter(name, desc string, tagKeys ...string) (monitor.BricksCounter, error) {
counterVec := prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: p.namespace,
Name: name,
Help: desc,
}, tagKeys)
err := prometheus.Register(counterVec)
if err != nil {
return nil, err
}
return &promCounterVec{
CounterVec: counterVec,
}, nil
}
func (p *promWrapper) Gauge(name, desc string, tagKeys ...string) (monitor.BricksGauge, error) {
gaugeVec := prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: p.namespace,
Name: name,
Help: desc,
}, tagKeys)
err := prometheus.Register(gaugeVec)
if err != nil {
return nil, err
}
return &promGaugeVec{
GaugeVec: gaugeVec,
}, nil
}
func (p *promWrapper) Histogram(name, desc string, buckets []float64, tagKeys ...string) (monitor.BricksHistogram, error) {
histogramVec := prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: p.namespace,
Name: name,
Help: desc,
Buckets: buckets,
}, tagKeys)
err := prometheus.Register(histogramVec)
if err != nil {
return nil, err
}
return &promHistogramVec{
HistogramVec: histogramVec,
}, nil
}
func (p *promWrapper) Timer(name, desc string, tagKeys ...string) (monitor.BricksTimer, error) {
histogramVec := prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: p.namespace,
Name: name,
Help: desc,
}, tagKeys)
err := prometheus.Register(histogramVec)
if err != nil {
return nil, err
}
return &promTimerVec{
HistogramVec: histogramVec,
}, nil
}
func (p *promWrapper) Remove(metric monitor.BrickMetric) error {
collector, ok := metric.(prometheus.Collector)
if !ok {
return errInvalidMetricType
}
prometheus.Unregister(collector)
return nil
}
var _ monitor.BricksReporter = (*promWrapper)(nil)