frostfs-node/internal/metrics/cache.go

package metrics

import (
	"strconv"
	"time"

	"git.frostfs.info/TrueCloudLab/frostfs-observability/metrics"
	"github.com/prometheus/client_golang/prometheus"
)

var cacheRequests = metrics.NewHistogramVec(prometheus.HistogramOpts{
	Namespace: namespace,
	Subsystem: commonCacheSubsystem,
	Name:      "request_duration_seconds",
	Help:      "Accumulated common cache request process duration",
}, []string{hitLabel, methodLabel, cacheLabel})

type CacheMetrics struct {
	cache string
}

// NewCacheMetrics returns new CacheMetrics instance for cache specified.
func NewCacheMetrics(cache string) *CacheMetrics {
	return &CacheMetrics{
		cache: cache,
	}
}

func (m *CacheMetrics) AddMethodDuration(method string, d time.Duration, hit bool) {
	cacheRequests.With(prometheus.Labels{
		hitLabel:    strconv.FormatBool(hit),
		methodLabel: method,
		cacheLabel:  m.cache,
	}).Observe(d.Seconds())
}