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use opentracing ext package when possible

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This commit is contained in:
bergquist 2017-09-11 18:43:41 +02:00
parent 935dad653c
commit 89c86c7a22
1 changed files with 9 additions and 16 deletions
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25
pkg/middleware/request_tracing.go
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@ -1,11 +1,11 @@
package middleware
import (
"fmt"
"net/http"
"time"
opentracing "github.com/opentracing/opentracing-go"
tlog "github.com/opentracing/opentracing-go/log"
"github.com/opentracing/opentracing-go/ext"
"gopkg.in/macaron.v1"
)
@ -15,28 +15,21 @@ func RequestTracing() macaron.Handler {
rw := res.(macaron.ResponseWriter)
var span opentracing.Span
opName := req.URL.Path
carrier := opentracing.HTTPHeadersCarrier(req.Header)
wireContext, err := opentracing.GlobalTracer().Extract(
opentracing.HTTPHeaders, carrier)
if err != nil {
span = opentracing.StartSpan(opName)
} else {
span = opentracing.StartSpan(opName, opentracing.ChildOf(wireContext))
}
tracer := opentracing.GlobalTracer()
wireContext, _ := tracer.Extract(opentracing.HTTPHeaders, opentracing.HTTPHeadersCarrier(req.Header))
spanName := fmt.Sprintf("HTTP %s %s", req.Method, req.URL.Path)
span = tracer.StartSpan(spanName, ext.RPCServerOption(wireContext))
defer span.Finish()
ctx := opentracing.ContextWithSpan(req.Context(), span)
req = req.WithContext(ctx)
start := time.Now()
c.Next()
status := rw.Status()
span.LogFields(
tlog.Int("http.status_code", status),
tlog.Float64("waited.millis", float64(time.Since(start)/time.Millisecond)))
ext.HTTPStatusCode.Set(span, uint16(status))
ext.HTTPUrl.Set(span, req.RequestURI)
ext.HTTPMethod.Set(span, req.Method)
}
}