move extractor to micro

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

subscriber.go

@@ -61,7 +61,7 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio
 
 		endpoints = append(endpoints, &registry.Endpoint{
 			Name:    "Func",
-			Request: extractSubValue(typ),
+			Request: registry.ExtractSubValue(typ),
 			Metadata: map[string]string{
 				"topic":      topic,
 				"subscriber": "true",
@@ -89,7 +89,7 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio
 
 			endpoints = append(endpoints, &registry.Endpoint{
 				Name:    name + "." + method.Name,
-				Request: extractSubValue(method.Type),
+				Request: registry.ExtractSubValue(method.Type),
 				Metadata: map[string]string{
 					"topic":      topic,
 					"subscriber": "true",
@@ -109,60 +109,6 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio
 	}
 }
 
-func validateSubscriber(sub server.Subscriber) error {
-	typ := reflect.TypeOf(sub.Subscriber())
-	var argType reflect.Type
-
-	if typ.Kind() == reflect.Func {
-		name := "Func"
-		switch typ.NumIn() {
-		case 2:
-			argType = typ.In(1)
-		default:
-			return fmt.Errorf("subscriber %v takes wrong number of args: %v required signature %s", name, typ.NumIn(), subSig)
-		}
-		if !isExportedOrBuiltinType(argType) {
-			return fmt.Errorf("subscriber %v argument type not exported: %v", name, argType)
-		}
-		if typ.NumOut() != 1 {
-			return fmt.Errorf("subscriber %v has wrong number of outs: %v require signature %s",
-				name, typ.NumOut(), subSig)
-		}
-		if returnType := typ.Out(0); returnType != typeOfError {
-			return fmt.Errorf("subscriber %v returns %v not error", name, returnType.String())
-		}
-	} else {
-		hdlr := reflect.ValueOf(sub.Subscriber())
-		name := reflect.Indirect(hdlr).Type().Name()
-
-		for m := 0; m < typ.NumMethod(); m++ {
-			method := typ.Method(m)
-
-			switch method.Type.NumIn() {
-			case 3:
-				argType = method.Type.In(2)
-			default:
-				return fmt.Errorf("subscriber %v.%v takes wrong number of args: %v required signature %s",
-					name, method.Name, method.Type.NumIn(), subSig)
-			}
-
-			if !isExportedOrBuiltinType(argType) {
-				return fmt.Errorf("%v argument type not exported: %v", name, argType)
-			}
-			if method.Type.NumOut() != 1 {
-				return fmt.Errorf(
-					"subscriber %v.%v has wrong number of outs: %v require signature %s",
-					name, method.Name, method.Type.NumOut(), subSig)
-			}
-			if returnType := method.Type.Out(0); returnType != typeOfError {
-				return fmt.Errorf("subscriber %v.%v returns %v not error", name, method.Name, returnType.String())
-			}
-		}
-	}
-
-	return nil
-}
-
 func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broker.Handler {
 	return func(p broker.Event) (err error) {
 		defer func() {