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- // Copyright (c) 2017 Uber Technologies, Inc.
- //
- // Licensed under the Apache License, Version 2.0 (the "License");
- // you may not use this file except in compliance with the License.
- // You may obtain a copy of the License at
- //
- // http://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
- package jaeger
- import (
- "github.com/opentracing/opentracing-go"
- )
- // TODO this file should not be needed after TChannel PR.
- type formatKey int
- // SpanContextFormat is a constant used as OpenTracing Format.
- // Requires *SpanContext as carrier.
- // This format is intended for interop with TChannel or other Zipkin-like tracers.
- const SpanContextFormat formatKey = iota
- type jaegerTraceContextPropagator struct {
- tracer *Tracer
- }
- func (p *jaegerTraceContextPropagator) Inject(
- ctx SpanContext,
- abstractCarrier interface{},
- ) error {
- carrier, ok := abstractCarrier.(*SpanContext)
- if !ok {
- return opentracing.ErrInvalidCarrier
- }
- carrier.CopyFrom(&ctx)
- return nil
- }
- func (p *jaegerTraceContextPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
- carrier, ok := abstractCarrier.(*SpanContext)
- if !ok {
- return emptyContext, opentracing.ErrInvalidCarrier
- }
- ctx := new(SpanContext)
- ctx.CopyFrom(carrier)
- return *ctx, nil
- }
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