mirror of
https://github.com/ceph/ceph-csi.git
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62 lines
2.0 KiB
Go
62 lines
2.0 KiB
Go
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/*
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Copyright 2018 The Kubernetes 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 client
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import (
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"context"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime"
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)
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// DelegatingClient forms a Client by composing separate reader, writer and
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// statusclient interfaces. This way, you can have an Client that reads from a
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// cache and writes to the API server.
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type DelegatingClient struct {
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Reader
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Writer
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StatusClient
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}
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// DelegatingReader forms a Reader that will cause Get and List requests for
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// unstructured types to use the ClientReader while requests for any other type
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// of object with use the CacheReader. This avoids accidentally caching the
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// entire cluster in the common case of loading arbitrary unstructured objects
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// (e.g. from OwnerReferences).
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type DelegatingReader struct {
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CacheReader Reader
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ClientReader Reader
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}
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// Get retrieves an obj for a given object key from the Kubernetes Cluster.
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func (d *DelegatingReader) Get(ctx context.Context, key ObjectKey, obj runtime.Object) error {
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_, isUnstructured := obj.(*unstructured.Unstructured)
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if isUnstructured {
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return d.ClientReader.Get(ctx, key, obj)
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}
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return d.CacheReader.Get(ctx, key, obj)
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}
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// List retrieves list of objects for a given namespace and list options.
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func (d *DelegatingReader) List(ctx context.Context, list runtime.Object, opts ...ListOption) error {
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_, isUnstructured := list.(*unstructured.UnstructuredList)
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if isUnstructured {
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return d.ClientReader.List(ctx, list, opts...)
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}
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return d.CacheReader.List(ctx, list, opts...)
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}
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