refactor application controller

Signed-off-by: zackzhang <zackzhang@yunify.com>

pkg/kapis/servicemesh/metrics/v1alpha2/swagger-doc.go

@@ -0,0 +1,40 @@
+/*
+Copyright 2020 KubeSphere Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha2
+
+/////////////////////
+// SWAGGER RESPONSES
+/////////////////////
+
+// NoContent: the response is empty
+type NoContent struct {
+	Status int32 `json:"status"`
+	Reason error `json:"reason"`
+}
+
+// BadRequestError: the client request is incorrect
+type BadRequestError struct {
+	Status int32 `json:"status"`
+	Reason error `json:"reason"`
+}
+
+// NotFoundError is the error message that is generated when server could not find
+// what was requested
+type NotFoundError struct {
+	Status int32 `json:"status"`
+	Reason error `json:"reason"`
+}