87 lines
2.3 KiB
Go
87 lines
2.3 KiB
Go
// Copyright (c) Mainflux
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
//go:build !test
|
|
|
|
package handler
|
|
|
|
import (
|
|
"context"
|
|
"time"
|
|
|
|
"github.com/go-kit/kit/metrics"
|
|
"github.com/mainflux/mproxy/pkg/session"
|
|
)
|
|
|
|
var _ session.Handler = (*metricsMiddleware)(nil)
|
|
|
|
type metricsMiddleware struct {
|
|
counter metrics.Counter
|
|
latency metrics.Histogram
|
|
svc session.Handler
|
|
}
|
|
|
|
// MetricsMiddleware instruments adapter by tracking request count and latency.
|
|
func MetricsMiddleware(svc session.Handler, counter metrics.Counter, latency metrics.Histogram) session.Handler {
|
|
return &metricsMiddleware{
|
|
counter: counter,
|
|
latency: latency,
|
|
svc: svc,
|
|
}
|
|
}
|
|
|
|
// AuthConnect implements session.Handler.
|
|
func (mm *metricsMiddleware) AuthConnect(ctx context.Context) error {
|
|
defer func(begin time.Time) {
|
|
mm.counter.With("method", "publish").Add(1)
|
|
mm.latency.With("method", "publish").Observe(time.Since(begin).Seconds())
|
|
}(time.Now())
|
|
|
|
return mm.svc.AuthConnect(ctx)
|
|
}
|
|
|
|
// AuthPublish implements session.Handler.
|
|
func (mm *metricsMiddleware) AuthPublish(ctx context.Context, topic *string, payload *[]byte) error {
|
|
defer func(begin time.Time) {
|
|
mm.counter.With("method", "publish").Add(1)
|
|
mm.latency.With("method", "publish").Observe(time.Since(begin).Seconds())
|
|
}(time.Now())
|
|
|
|
return mm.svc.AuthPublish(ctx, topic, payload)
|
|
}
|
|
|
|
// AuthSubscribe implements session.Handler.
|
|
func (*metricsMiddleware) AuthSubscribe(ctx context.Context, topics *[]string) error {
|
|
return nil
|
|
}
|
|
|
|
// Connect implements session.Handler.
|
|
func (*metricsMiddleware) Connect(ctx context.Context) error {
|
|
return nil
|
|
}
|
|
|
|
// Disconnect implements session.Handler.
|
|
func (*metricsMiddleware) Disconnect(ctx context.Context) error {
|
|
return nil
|
|
}
|
|
|
|
// Publish instruments Publish method with metrics.
|
|
func (mm *metricsMiddleware) Publish(ctx context.Context, topic *string, payload *[]byte) error {
|
|
defer func(begin time.Time) {
|
|
mm.counter.With("method", "publish").Add(1)
|
|
mm.latency.With("method", "publish").Observe(time.Since(begin).Seconds())
|
|
}(time.Now())
|
|
|
|
return mm.svc.Publish(ctx, topic, payload)
|
|
}
|
|
|
|
// Subscribe implements session.Handler.
|
|
func (*metricsMiddleware) Subscribe(ctx context.Context, topics *[]string) error {
|
|
return nil
|
|
}
|
|
|
|
// Unsubscribe implements session.Handler.
|
|
func (*metricsMiddleware) Unsubscribe(ctx context.Context, topics *[]string) error {
|
|
return nil
|
|
}
|