dd-trace example

tracer.Start(tracer.WithAgentAddr(logger.DDAgentAddr()),tracer.WithSampler(tracer.NewRateSampler(0.01)))
defer tracer.Stop()


func FilterCardsHandler(w http.ResponseWriter, r *http.Request) {
  span := tracer.StartSpanFromContext(r, "FilterCardsHandler")
  defer span.Finish()
}

func CardBuilder(span ddtrace.Span) {
  child := tracer.StartSpan("CardBuilder", tracer.ChildOf(span.Context()))
  defer span.Finish()
}