2016-11-09 20:30:07 +00:00
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// Copyright 2016 Circonus, Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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2016-07-19 23:40:41 +00:00
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package circonusgometrics
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import (
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"net/http"
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"time"
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)
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// TrackHTTPLatency wraps Handler functions registered with an http.ServerMux tracking latencies.
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// Metrics are of the for go`HTTP`<method>`<name>`latency and are tracked in a histogram in units
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// of seconds (as a float64) providing nanosecond ganularity.
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func (m *CirconusMetrics) TrackHTTPLatency(name string, handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
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return func(rw http.ResponseWriter, req *http.Request) {
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start := time.Now().UnixNano()
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handler(rw, req)
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elapsed := time.Now().UnixNano() - start
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m.RecordValue("go`HTTP`"+req.Method+"`"+name+"`latency", float64(elapsed)/float64(time.Second))
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}
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}
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