83 lines
2.8 KiB
Go
83 lines
2.8 KiB
Go
|
// 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 jaeger
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/opentracing/opentracing-go"
|
||
|
|
)
|
||
|
|
|
||
|
|
// ZipkinSpanFormat is an OpenTracing carrier format constant
|
||
|
|
const ZipkinSpanFormat = "zipkin-span-format"
|
||
|
|
|
||
|
|
// ExtractableZipkinSpan is a type of Carrier used for integration with Zipkin-aware
|
||
|
|
// RPC frameworks (like TChannel). It does not support baggage, only trace IDs.
|
||
|
|
type ExtractableZipkinSpan interface {
|
||
|
|
TraceID() uint64
|
||
|
|
SpanID() uint64
|
||
|
|
ParentID() uint64
|
||
|
|
Flags() byte
|
||
|
|
}
|
||
|
|
|
||
|
|
// InjectableZipkinSpan is a type of Carrier used for integration with Zipkin-aware
|
||
|
|
// RPC frameworks (like TChannel). It does not support baggage, only trace IDs.
|
||
|
|
type InjectableZipkinSpan interface {
|
||
|
|
SetTraceID(traceID uint64)
|
||
|
|
SetSpanID(spanID uint64)
|
||
|
|
SetParentID(parentID uint64)
|
||
|
|
SetFlags(flags byte)
|
||
|
|
}
|
||
|
|
|
||
|
|
type zipkinPropagator struct {
|
||
|
|
tracer *Tracer
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p *zipkinPropagator) Inject(
|
||
|
|
ctx SpanContext,
|
||
|
|
abstractCarrier interface{},
|
||
|
|
) error {
|
||
|
|
carrier, ok := abstractCarrier.(InjectableZipkinSpan)
|
||
|
|
if !ok {
|
||
|
|
return opentracing.ErrInvalidCarrier
|
||
|
|
}
|
||
|
|
|
||
|
|
carrier.SetTraceID(ctx.TraceID().Low) // TODO this cannot work with 128bit IDs
|
||
|
|
carrier.SetSpanID(uint64(ctx.SpanID()))
|
||
|
|
carrier.SetParentID(uint64(ctx.ParentID()))
|
||
|
|
carrier.SetFlags(ctx.flags)
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p *zipkinPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
|
||
|
|
carrier, ok := abstractCarrier.(ExtractableZipkinSpan)
|
||
|
|
if !ok {
|
||
|
|
return emptyContext, opentracing.ErrInvalidCarrier
|
||
|
|
}
|
||
|
|
if carrier.TraceID() == 0 {
|
||
|
|
return emptyContext, opentracing.ErrSpanContextNotFound
|
||
|
|
}
|
||
|
|
var ctx SpanContext
|
||
|
|
ctx.traceID.Low = carrier.TraceID()
|
||
|
|
ctx.spanID = SpanID(carrier.SpanID())
|
||
|
|
ctx.parentID = SpanID(carrier.ParentID())
|
||
|
|
ctx.flags = carrier.Flags()
|
||
|
|
return ctx, nil
|
||
|
|
}
|