server

func Interceptor ¶

func Interceptor(
	ctxIn context.Context,
	req interface{},
	info *grpc.UnaryServerInfo,
	handler grpc.UnaryHandler) (resp interface{}, err error)

Interceptor intercepts and extracts incoming trace data at a grpc server. It expects to find incoming trace ID, the parent and forced child span IDs, (i.e. the context of the outgoing client-side span, along with the trace ID it expects to see used as the remote child). It also expects to find the flag indicating if the client-side span was an infrastructure span or not.

If these flags are not present, the values corresponding to no previous context are used.