63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
//
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// Copyright (c) 2018
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// Mainflux
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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// +build !test
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package api
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import (
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"time"
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"github.com/go-kit/kit/metrics"
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"github.com/mainflux/mainflux"
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"github.com/mainflux/mainflux/coap"
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)
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var _ coap.Service = (*metricsMiddleware)(nil)
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type metricsMiddleware struct {
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counter metrics.Counter
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latency metrics.Histogram
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svc coap.Service
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}
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// MetricsMiddleware instruments adapter by tracking request count and latency.
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func MetricsMiddleware(svc coap.Service, counter metrics.Counter, latency metrics.Histogram) coap.Service {
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return &metricsMiddleware{
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counter: counter,
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latency: latency,
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svc: svc,
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}
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}
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func (mm *metricsMiddleware) Publish(msg mainflux.RawMessage) error {
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defer func(begin time.Time) {
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mm.counter.With("method", "publish").Add(1)
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mm.latency.With("method", "publish").Observe(time.Since(begin).Seconds())
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}(time.Now())
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return mm.svc.Publish(msg)
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}
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func (mm *metricsMiddleware) Subscribe(chanID, clientID string, o *coap.Observer) error {
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defer func(begin time.Time) {
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mm.counter.With("method", "subscribe").Add(1)
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mm.latency.With("method", "subscribe").Observe(time.Since(begin).Seconds())
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}(time.Now())
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return mm.svc.Subscribe(chanID, clientID, o)
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}
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func (mm *metricsMiddleware) Unsubscribe(clientID string) {
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defer func(begin time.Time) {
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mm.counter.With("method", "unsubscribe").Add(1)
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mm.latency.With("method", "unsubscribe").Observe(time.Since(begin).Seconds())
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}(time.Now())
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mm.svc.Unsubscribe(clientID)
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}
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