diff --git a/servlet/rest-servlet.go b/servlet/rest-servlet.go
index 63796c9..eb6c4c5 100644
--- a/servlet/rest-servlet.go
+++ b/servlet/rest-servlet.go
@@ -27,17 +27,17 @@ type RESTServlet interface {
 type RESTServlets struct {
 	cswf.Servlets
 
-	RESTRegistry crr.RESTRegistry
+	restRegistry crr.RESTRegistry
 
-	MethodMapping map[string]map[string]*MethodMapping
+	methodMapping map[string]map[string]*MethodMapping
 }
 
 func (s *RESTServlets) Init(serverCtx server.ServerCtx) error {
 	if err := s.Servlets.Init(serverCtx); nil != err {
 		return err
 	}
-	if nil == s.MethodMapping {
-		s.MethodMapping = make(map[string]map[string]*MethodMapping)
+	if nil == s.methodMapping {
+		s.methodMapping = make(map[string]map[string]*MethodMapping)
 	}
 
 	return nil
@@ -47,7 +47,7 @@ func (s *RESTServlets) Handle(servletCtx server.ServletCtx, ctx *fasthttp.Reques
 	method := string(ctx.Method())
 	path := string(ctx.Path())
 
-	es, ok := s.MethodMapping[method]
+	es, ok := s.methodMapping[method]
 	if !ok {
 		return csw.NewError(fasthttp.StatusNotFound, fmt.Errorf("Not Found for [%s]%s", method, path))
 	}
@@ -83,7 +83,7 @@ func (s *RESTServlets) HandleGet(servletCtx server.ServletCtx, ctx *fasthttp.Req
 		}
 	}
 
-	_, err := s.RESTRegistry.Invoke(mapping.Method, params, servletCtx, ctx)
+	_, err := s.restRegistry.Invoke(mapping.Method, params, servletCtx, ctx)
 
 	if nil != err {
 		return csw.NewError(fasthttp.StatusInternalServerError, err)
@@ -109,7 +109,7 @@ func (s *RESTServlets) HandlePost(servletCtx server.ServletCtx, ctx *fasthttp.Re
 		}
 	}
 
-	_, err := s.RESTRegistry.Invoke(mapping.Method, params, servletCtx, ctx)
+	_, err := s.restRegistry.Invoke(mapping.Method, params, servletCtx, ctx)
 
 	if nil != err {
 		return csw.NewError(fasthttp.StatusInternalServerError, err)
@@ -123,8 +123,8 @@ func (s *RESTServlets) RegisterRESTServices(services []interface{}) error {
 		return nil
 	}
 
-	s.MethodMapping = make(map[string]map[string]*MethodMapping)
-	s.RESTRegistry = crr.NewRESTRegistry()
+	s.methodMapping = make(map[string]map[string]*MethodMapping)
+	s.restRegistry = crr.NewRESTRegistry()
 
 LOOP:
 	for _, service := range services {
@@ -133,7 +133,7 @@ LOOP:
 		if nil == ta {
 			return fmt.Errorf("Service[%s] is not RESTService, use @RESTService", t.Elem().Name())
 		}
-		s.RESTRegistry.RegisterService(service, "")
+		s.restRegistry.RegisterService(service, "")
 
 		mas := cdr.GetMethodAnnotations(t, oca.RequestMappingAnnotationType)
 		if nil == mas || 0 == len(mas) {
@@ -142,10 +142,10 @@ LOOP:
 
 		for methodName, v := range mas {
 			ma := v.(*oca.RequestMappingAnnotation)
-			mm, ok := s.MethodMapping[ma.Method]
+			mm, ok := s.methodMapping[ma.Method]
 			if !ok {
 				mm = make(map[string]*MethodMapping)
-				s.MethodMapping[ma.Method] = mm
+				s.methodMapping[ma.Method] = mm
 			}
 
 			_, ok = mm[ma.Entry]