82 lines
2.8 KiB
Go
82 lines
2.8 KiB
Go
// Copyright (c) 2017 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package jaeger
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import (
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"github.com/opentracing/opentracing-go"
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)
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// ZipkinSpanFormat is an OpenTracing carrier format constant
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const ZipkinSpanFormat = "zipkin-span-format"
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// ExtractableZipkinSpan is a type of Carrier used for integration with Zipkin-aware
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// RPC frameworks (like TChannel). It does not support baggage, only trace IDs.
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type ExtractableZipkinSpan interface {
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TraceID() uint64
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SpanID() uint64
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ParentID() uint64
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Flags() byte
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}
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// InjectableZipkinSpan is a type of Carrier used for integration with Zipkin-aware
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// RPC frameworks (like TChannel). It does not support baggage, only trace IDs.
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type InjectableZipkinSpan interface {
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SetTraceID(traceID uint64)
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SetSpanID(spanID uint64)
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SetParentID(parentID uint64)
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SetFlags(flags byte)
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}
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type zipkinPropagator struct {
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tracer *Tracer
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}
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func (p *zipkinPropagator) Inject(
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ctx SpanContext,
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abstractCarrier interface{},
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) error {
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carrier, ok := abstractCarrier.(InjectableZipkinSpan)
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if !ok {
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return opentracing.ErrInvalidCarrier
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}
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carrier.SetTraceID(ctx.TraceID().Low) // TODO this cannot work with 128bit IDs
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carrier.SetSpanID(uint64(ctx.SpanID()))
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carrier.SetParentID(uint64(ctx.ParentID()))
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carrier.SetFlags(ctx.flags)
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return nil
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}
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func (p *zipkinPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
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carrier, ok := abstractCarrier.(ExtractableZipkinSpan)
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if !ok {
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return emptyContext, opentracing.ErrInvalidCarrier
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}
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if carrier.TraceID() == 0 {
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return emptyContext, opentracing.ErrSpanContextNotFound
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}
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var ctx SpanContext
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ctx.traceID.Low = carrier.TraceID()
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ctx.spanID = SpanID(carrier.SpanID())
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ctx.parentID = SpanID(carrier.ParentID())
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ctx.flags = carrier.Flags()
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return ctx, nil
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}
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