Initial commit

vendor/sigs.k8s.io/controller-runtime/pkg/cache/internal/deleg_map.go

@@ -0,0 +1,96 @@
+/*
+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 internal
+
+import (
+	"time"
+
+	"k8s.io/apimachinery/pkg/api/meta"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/client-go/rest"
+	"k8s.io/client-go/tools/cache"
+)
+
+// InformersMap create and caches Informers for (runtime.Object, schema.GroupVersionKind) pairs.
+// It uses a standard parameter codec constructed based on the given generated Scheme.
+type InformersMap struct {
+	// we abstract over the details of structured vs unstructured with the specificInformerMaps
+
+	structured   *specificInformersMap
+	unstructured *specificInformersMap
+
+	// Scheme maps runtime.Objects to GroupVersionKinds
+	Scheme *runtime.Scheme
+}
+
+// NewInformersMap creates a new InformersMap that can create informers for
+// both structured and unstructured objects.
+func NewInformersMap(config *rest.Config,
+	scheme *runtime.Scheme,
+	mapper meta.RESTMapper,
+	resync time.Duration,
+	namespace string) *InformersMap {
+
+	return &InformersMap{
+		structured:   newStructuredInformersMap(config, scheme, mapper, resync, namespace),
+		unstructured: newUnstructuredInformersMap(config, scheme, mapper, resync, namespace),
+
+		Scheme: scheme,
+	}
+}
+
+// Start calls Run on each of the informers and sets started to true.  Blocks on the stop channel.
+func (m *InformersMap) Start(stop <-chan struct{}) error {
+	go m.structured.Start(stop)
+	go m.unstructured.Start(stop)
+	<-stop
+	return nil
+}
+
+// WaitForCacheSync waits until all the caches have been synced.
+func (m *InformersMap) WaitForCacheSync(stop <-chan struct{}) bool {
+	syncedFuncs := append([]cache.InformerSynced(nil), m.structured.HasSyncedFuncs()...)
+	syncedFuncs = append(syncedFuncs, m.unstructured.HasSyncedFuncs()...)
+
+	return cache.WaitForCacheSync(stop, syncedFuncs...)
+}
+
+// Get will create a new Informer and add it to the map of InformersMap if none exists.  Returns
+// the Informer from the map.
+func (m *InformersMap) Get(gvk schema.GroupVersionKind, obj runtime.Object) (*MapEntry, error) {
+	_, isUnstructured := obj.(*unstructured.Unstructured)
+	_, isUnstructuredList := obj.(*unstructured.UnstructuredList)
+	isUnstructured = isUnstructured || isUnstructuredList
+
+	if isUnstructured {
+		return m.unstructured.Get(gvk, obj)
+	}
+
+	return m.structured.Get(gvk, obj)
+}
+
+// newStructuredInformersMap creates a new InformersMap for structured objects.
+func newStructuredInformersMap(config *rest.Config, scheme *runtime.Scheme, mapper meta.RESTMapper, resync time.Duration, namespace string) *specificInformersMap {
+	return newSpecificInformersMap(config, scheme, mapper, resync, namespace, createStructuredListWatch)
+}
+
+// newUnstructuredInformersMap creates a new InformersMap for unstructured objects.
+func newUnstructuredInformersMap(config *rest.Config, scheme *runtime.Scheme, mapper meta.RESTMapper, resync time.Duration, namespace string) *specificInformersMap {
+	return newSpecificInformersMap(config, scheme, mapper, resync, namespace, createUnstructuredListWatch)
+}