Resolve "Add an option to send gNMI Subscribe requests via SBI"

Description

#227 (closed)

controller/northbound/server/pnd.go

@@ -655,30 +655,23 @@ func (p PndServer) DeleteOnd(ctx context.Context, request *ppb.DeleteOndRequest)
 
 // SubscribePath subscribes to specifc paths of an ond
 func (p PndServer) SubscribePath(request *ppb.SubscribePathRequest, stream ppb.PndService_SubscribePathServer) error {
-	labels := prometheus.Labels{"service": "pnd", "rpc": "subscribe path"}
-	start := metrics.StartHook(labels, grpcRequestsTotal)
-	defer metrics.FinishHook(labels, start, grpcRequestDurationSecondsTotal, grpcRequestDurationSeconds)
-
 	pid, err := uuid.Parse(request.Pid)
 	if err != nil {
-		return handleRPCError(labels, err)
+		return err
 	}
 
 	pnd, err := p.pndStore.Get(store.Query{ID: pid})
 	if err != nil {
-		log.Error(err)
-		return handleRPCError(labels, err)
+		return err
 	}
 
 	did, err := uuid.Parse(request.Did)
 	if err != nil {
-		log.Error(err)
-		return handleRPCError(labels, err)
+		return err
 	}
 
 	if err := pnd.SubscribePath(did, request.Sublist); err != nil {
-		log.Error(err)
-		return handleRPCError(labels, err)
+		return err
 	}
 
 	return nil