get traceId from zipkintracer

Question

I am using zipkin-go-opentracing, which is an implementation of the opentracing API for zipkin in go.

For (reasons) I need to get the traceId from a span. So the question: given a opentracing.Span, how do I get the TraceId? Everything I've tried has given me some kind of type assertion error.

Thanks,

See http://stackoverflow.com/questions/42699603/how-can-i-get-a-trace-id-from-opentracing-api — Yuri Shkuro, Mar 10 '17 at 18:54

score 0 · Answer 1 · answered Jun 24 '16 at 19:52

0

import (
    "github.com/opentracing/opentracing-go"
    "github.com/openzipkin/zipkin-go-opentracing"
)
func IdFromSpan(aspan interface{}) uint64 {
    zspan := aspan.(zipkintracer.Span)
    return zspan.Context().TraceID
}

answered Jun 24 '16 at 19:52

Chris Kiick

41
3

I tried doing this but I got TraceID not defined error. It's picking up the Context from opentracing – Ali Moghadam Dec 22 '16 at 09:14

score 0 · Answer 2 · answered Aug 19 '17 at 08:59

I'm not sure this is the right way to do it but this should normally works

stdopentracing "github.com/opentracing/opentracing-go"
zipkin "github.com/openzipkin/zipkin-go-opentracing"

[...]

var traceID string

sp := stdopentracing.SpanFromContext(ctx)

if sp != nil {
    traceID = sp.Context().(zipkin.SpanContext).TraceID.ToHex()
}

get traceId from zipkintracer

2 Answers2