mirror of https://github.com/knative/caching.git
76 lines
2.3 KiB
Go
76 lines
2.3 KiB
Go
/*
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Copyright 2018 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kmeta
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import (
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"fmt"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/client-go/tools/cache"
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)
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// Accessor is a collection of interfaces from metav1.TypeMeta,
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// runtime.Object and metav1.Object that Kubernetes API types
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// registered with runtime.Scheme must support.
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type Accessor interface {
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metav1.Object
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// Interfaces for metav1.TypeMeta
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GroupVersionKind() schema.GroupVersionKind
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SetGroupVersionKind(gvk schema.GroupVersionKind)
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// Interfaces for runtime.Object
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GetObjectKind() schema.ObjectKind
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DeepCopyObject() runtime.Object
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}
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// DeletionHandlingAccessor tries to convert given interface into Accessor first;
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// and to handle deletion, it try to fetch info from DeletedFinalStateUnknown on failure.
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// The name is a reference to cache.DeletionHandlingMetaNamespaceKeyFunc
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func DeletionHandlingAccessor(obj interface{}) (Accessor, error) {
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accessor, ok := obj.(Accessor)
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if !ok {
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// To handle obj deletion, try to fetch info from DeletedFinalStateUnknown.
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tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
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if !ok {
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return nil, fmt.Errorf("couldn't get Accessor from tombstone %#v", obj)
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}
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accessor, ok = tombstone.Obj.(Accessor)
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if !ok {
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return nil, fmt.Errorf("the object that Tombstone contained is not of kmeta.Accessor %#v", obj)
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}
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}
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return accessor, nil
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}
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// ObjectReference returns an core/v1.ObjectReference for the given object
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func ObjectReference(obj Accessor) corev1.ObjectReference {
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gvk := obj.GroupVersionKind()
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apiVersion, kind := gvk.ToAPIVersionAndKind()
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return corev1.ObjectReference{
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APIVersion: apiVersion,
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Kind: kind,
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Namespace: obj.GetNamespace(),
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Name: obj.GetName(),
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}
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}
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