change cluster schema (#2026)

* change cluster schema

* change cluster schema

vendor/sigs.k8s.io/kubefed/pkg/controller/util/resourceinformer.go

@@ -0,0 +1,90 @@
+/*
+Copyright 2018 The Kubernetes 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 util
+
+import (
+	"github.com/pkg/errors"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/labels"
+	pkgruntime "k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/apimachinery/pkg/watch"
+	"k8s.io/client-go/tools/cache"
+)
+
+// NewResourceInformer returns an unfiltered informer.
+func NewResourceInformer(client ResourceClient, namespace string, apiResource *metav1.APIResource, triggerFunc func(pkgruntime.Object)) (cache.Store, cache.Controller) {
+	return newResourceInformer(client, namespace, apiResource, triggerFunc, "")
+}
+
+// NewManagedResourceInformer returns an informer limited to resources
+// managed by KubeFed as indicated by labeling.
+func NewManagedResourceInformer(client ResourceClient, namespace string, apiResource *metav1.APIResource, triggerFunc func(pkgruntime.Object)) (cache.Store, cache.Controller) {
+	labelSelector := labels.Set(map[string]string{ManagedByKubeFedLabelKey: ManagedByKubeFedLabelValue}).AsSelector().String()
+	return newResourceInformer(client, namespace, apiResource, triggerFunc, labelSelector)
+}
+
+func newResourceInformer(client ResourceClient, namespace string, apiResource *metav1.APIResource, triggerFunc func(pkgruntime.Object), labelSelector string) (cache.Store, cache.Controller) {
+	obj := &unstructured.Unstructured{}
+
+	if apiResource != nil {
+		gvk := schema.GroupVersionKind{Group: apiResource.Group, Version: apiResource.Version, Kind: apiResource.Kind}
+		obj.SetGroupVersionKind(gvk)
+	}
+	return cache.NewInformer(
+		&cache.ListWatch{
+			ListFunc: func(options metav1.ListOptions) (pkgruntime.Object, error) {
+				options.LabelSelector = labelSelector
+				return client.Resources(namespace).List(options)
+			},
+			WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
+				options.LabelSelector = labelSelector
+				return client.Resources(namespace).Watch(options)
+			},
+		},
+		obj, // use an unstructured type with apiVersion / kind populated for informer logging purposes
+		NoResyncPeriod,
+		NewTriggerOnAllChanges(triggerFunc),
+	)
+}
+
+func ObjFromCache(store cache.Store, kind, key string) (*unstructured.Unstructured, error) {
+	obj, err := rawObjFromCache(store, kind, key)
+	if err != nil {
+		return nil, err
+	}
+	if obj == nil {
+		return nil, nil
+	}
+	return obj.(*unstructured.Unstructured), nil
+}
+
+func rawObjFromCache(store cache.Store, kind, key string) (pkgruntime.Object, error) {
+	cachedObj, exist, err := store.GetByKey(key)
+	if err != nil {
+		wrappedErr := errors.Wrapf(err, "Failed to query %s store for %q", kind, key)
+		runtime.HandleError(wrappedErr)
+		return nil, err
+	}
+	if !exist {
+		return nil, nil
+	}
+	return cachedObj.(pkgruntime.Object).DeepCopyObject(), nil
+}