forked from absmach/magistrala
/
metrics.go
76 lines (59 loc) · 2.35 KB
/
metrics.go
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// Copyright (c) Mainflux
// SPDX-License-Identifier: Apache-2.0
//go:build !test
package api
import (
"context"
"time"
"github.com/go-kit/kit/metrics"
notifiers "github.com/mainflux/mainflux/consumers/notifiers"
)
var _ notifiers.Service = (*metricsMiddleware)(nil)
type metricsMiddleware struct {
counter metrics.Counter
latency metrics.Histogram
svc notifiers.Service
}
// MetricsMiddleware instruments core service by tracking request count and latency.
func MetricsMiddleware(svc notifiers.Service, counter metrics.Counter, latency metrics.Histogram) notifiers.Service {
return &metricsMiddleware{
counter: counter,
latency: latency,
svc: svc,
}
}
func (ms *metricsMiddleware) CreateSubscription(ctx context.Context, token string, sub notifiers.Subscription) (string, error) {
defer func(begin time.Time) {
ms.counter.With("method", "create_subscription").Add(1)
ms.latency.With("method", "create_subscription").Observe(time.Since(begin).Seconds())
}(time.Now())
return ms.svc.CreateSubscription(ctx, token, sub)
}
func (ms *metricsMiddleware) ViewSubscription(ctx context.Context, token, topic string) (notifiers.Subscription, error) {
defer func(begin time.Time) {
ms.counter.With("method", "view_subscription").Add(1)
ms.latency.With("method", "view_subscription").Observe(time.Since(begin).Seconds())
}(time.Now())
return ms.svc.ViewSubscription(ctx, token, topic)
}
func (ms *metricsMiddleware) ListSubscriptions(ctx context.Context, token string, pm notifiers.PageMetadata) (notifiers.Page, error) {
defer func(begin time.Time) {
ms.counter.With("method", "list_subscriptions").Add(1)
ms.latency.With("method", "list_subscriptions").Observe(time.Since(begin).Seconds())
}(time.Now())
return ms.svc.ListSubscriptions(ctx, token, pm)
}
func (ms *metricsMiddleware) RemoveSubscription(ctx context.Context, token, id string) error {
defer func(begin time.Time) {
ms.counter.With("method", "remove_subscription").Add(1)
ms.latency.With("method", "remove_subscription").Observe(time.Since(begin).Seconds())
}(time.Now())
return ms.svc.RemoveSubscription(ctx, token, id)
}
func (ms *metricsMiddleware) Consume(msg interface{}) error {
defer func(begin time.Time) {
ms.counter.With("method", "consume").Add(1)
ms.latency.With("method", "consume").Observe(time.Since(begin).Seconds())
}(time.Now())
return ms.svc.Consume(msg)
}