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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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