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stats.go
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/
stats.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package route
import (
"context"
"expvar"
"time"
"github.com/opentracing/opentracing-go"
)
var routeCalcByCustomer = expvar.NewMap("route.calc.by.customer.sec")
var routeCalcBySession = expvar.NewMap("route.calc.by.session.sec")
var stats = []struct {
expvar *expvar.Map
baggage string
}{
{routeCalcByCustomer, "customer"},
{routeCalcBySession, "session"},
}
func updateCalcStats(ctx context.Context, delay time.Duration) {
span := opentracing.SpanFromContext(ctx)
if span == nil {
return
}
delaySec := float64(delay/time.Millisecond) / 1000.0
for _, s := range stats {
key := span.BaggageItem(s.baggage)
if key != "" {
s.expvar.AddFloat(key, delaySec)
}
}
}