66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
package discovery
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import (
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"errors"
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"sync"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"github.com/tech/sendico/pkg/merrors"
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)
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var (
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metricsOnce sync.Once
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eventLatency *prometheus.HistogramVec
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eventStatus *prometheus.CounterVec
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)
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func initMetrics() {
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metricsOnce.Do(func() {
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eventLatency = promauto.NewHistogramVec(prometheus.HistogramOpts{
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Namespace: "sendico",
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Subsystem: "discovery",
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Name: "event_latency_seconds",
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Help: "Latency distribution for discovery event handling.",
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Buckets: prometheus.DefBuckets,
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}, []string{"event"})
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eventStatus = promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: "sendico",
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Subsystem: "discovery",
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Name: "event_requests_total",
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Help: "Total number of discovery events handled, grouped by event and status.",
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}, []string{"event", "status"})
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})
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}
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func observeEvent(event string, err error, duration time.Duration) {
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if eventLatency != nil {
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eventLatency.WithLabelValues(event).Observe(duration.Seconds())
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}
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if eventStatus != nil {
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eventStatus.WithLabelValues(event, statusLabel(err)).Inc()
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}
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}
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func statusLabel(err error) string {
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switch {
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case err == nil:
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return "ok"
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case errors.Is(err, merrors.ErrInvalidArg):
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return "invalid_argument"
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case errors.Is(err, merrors.ErrNoData):
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return "not_found"
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case errors.Is(err, merrors.ErrDataConflict):
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return "conflict"
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case errors.Is(err, merrors.ErrAccessDenied):
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return "denied"
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case errors.Is(err, merrors.ErrInternal):
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return "internal"
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default:
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return "error"
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}
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}
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