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/*
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 generic
import (
"context"
"fmt"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest"
"gitee.com/kubernetes-simples/client-go/client"
"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
)
// New returns a new Client using the provided config and Options.
// The returned client reads *and* writes directly from the server
// (it doesn't use object caches). It understands how to work with
// normal types (both custom resources and aggregated/built-in resources),
// as well as unstructured types.
//
// In the case of normal types, the scheme will be used to look up the
// corresponding group, version, and kind for the given type. In the
// case of unstructured types, the group, version, and kind will be extracted
// from the corresponding fields on the object.
func New(config *rest.Config, options client.Options) (client.Client, error) {
if config == nil {
return nil, fmt.Errorf("must provide non-nil rest.Config to client.New")
}
// Init a scheme if none provided
if options.Scheme == nil {
options.Scheme = scheme.Scheme
}
// Init a Mapper if none provided
if options.Mapper == nil {
var err error
options.Mapper, err = apiutil.NewDynamicRESTMapper(config)
if err != nil {
return nil, err
}
}
clientcache := client.NewClientCache(config, options)
c := &genericClient{
typedClient: typedClient{
cache: clientcache,
paramCodec: runtime.NewParameterCodec(options.Scheme),
},
unstructuredClient: unstructuredClient{
cache: clientcache,
paramCodec: client.NoConversionParamCodec{},
},
}
return c, nil
}
func NewForConfigOrDie(config *rest.Config, options client.Options) client.Client {
client, err := New(config, options)
if err != nil {
panic(err)
}
return client
}
var _ client.Client = &genericClient{}
// genericClient is a client.Client that reads and writes directly from/to an KubeSphere API server. It lazily initializes
// new clients at the time they are used, and caches the client.
type genericClient struct {
typedClient typedClient
unstructuredClient unstructuredClient
}
// resetGroupVersionKind is a helper function to restore and preserve GroupVersionKind on an object.
func (c *genericClient) resetGroupVersionKind(obj runtime.Object, gvk schema.GroupVersionKind) {
if gvk != schema.EmptyObjectKind.GroupVersionKind() {
if v, ok := obj.(schema.ObjectKind); ok {
v.SetGroupVersionKind(gvk)
}
}
}
// Create implements client.Client
func (c *genericClient) Create(ctx context.Context, obj runtime.Object, opts ...client.CreateOption) error {
_, ok := obj.(*unstructured.Unstructured)
if ok {
return c.unstructuredClient.Create(ctx, obj, opts...)
}
return c.typedClient.Create(ctx, obj, opts...)
}
// Update implements client.Client
func (c *genericClient) Update(ctx context.Context, obj runtime.Object, opts ...client.UpdateOption) error {
defer c.resetGroupVersionKind(obj, obj.GetObjectKind().GroupVersionKind())
_, ok := obj.(*unstructured.Unstructured)
if ok {
return c.unstructuredClient.Update(ctx, obj, opts...)
}
return c.typedClient.Update(ctx, obj, opts...)
}
// Delete implements client.Client
func (c *genericClient) Delete(ctx context.Context, obj runtime.Object, opts ...client.DeleteOption) error {
_, ok := obj.(*unstructured.Unstructured)
if ok {
return c.unstructuredClient.Delete(ctx, obj, opts...)
}
return c.typedClient.Delete(ctx, obj, opts...)
}
// DeleteAllOf implements client.Client
func (c *genericClient) DeleteAllOf(ctx context.Context, obj runtime.Object, opts ...client.DeleteAllOfOption) error {
_, ok := obj.(*unstructured.Unstructured)
if ok {
return c.unstructuredClient.DeleteAllOf(ctx, obj, opts...)
}
return c.typedClient.DeleteAllOf(ctx, obj, opts...)
}
// Patch implements client.Client
func (c *genericClient) Patch(ctx context.Context, obj runtime.Object, patch client.Patch, opts ...client.PatchOption) error {
defer c.resetGroupVersionKind(obj, obj.GetObjectKind().GroupVersionKind())
_, ok := obj.(*unstructured.Unstructured)
if ok {
return c.unstructuredClient.Patch(ctx, obj, patch, opts...)
}
return c.typedClient.Patch(ctx, obj, patch, opts...)
}
// Get implements client.Client
func (c *genericClient) Get(ctx context.Context, key client.ObjectKey, obj runtime.Object, opts ...client.GetOption) error {
_, ok := obj.(*unstructured.Unstructured)
if ok {
return c.unstructuredClient.Get(ctx, key, obj, opts...)
}
return c.typedClient.Get(ctx, key, obj, opts...)
}
// List implements client.Client
func (c *genericClient) List(ctx context.Context, obj runtime.Object, opts ...client.ListOption) error {
_, ok := obj.(*unstructured.UnstructuredList)
if ok {
return c.unstructuredClient.List(ctx, obj, opts...)
}
return c.typedClient.List(ctx, obj, opts...)
}
// Status implements client.StatusClient
func (c *genericClient) Status() client.StatusWriter {
return &statusWriter{client: c}
}
// statusWriter is client.StatusWriter that writes status subresource
type statusWriter struct {
client *genericClient
}
// ensure statusWriter implements client.StatusWriter
var _ client.StatusWriter = &statusWriter{}
// Update implements client.StatusWriter
func (sw *statusWriter) Update(ctx context.Context, obj runtime.Object, opts ...client.UpdateOption) error {
defer sw.client.resetGroupVersionKind(obj, obj.GetObjectKind().GroupVersionKind())
_, ok := obj.(*unstructured.Unstructured)
if ok {
return sw.client.unstructuredClient.UpdateStatus(ctx, obj, opts...)
}
return sw.client.typedClient.UpdateStatus(ctx, obj, opts...)
}
// Patch implements client.Client
func (sw *statusWriter) Patch(ctx context.Context, obj runtime.Object, patch client.Patch, opts ...client.PatchOption) error {
defer sw.client.resetGroupVersionKind(obj, obj.GetObjectKind().GroupVersionKind())
_, ok := obj.(*unstructured.Unstructured)
if ok {
return sw.client.unstructuredClient.PatchStatus(ctx, obj, patch, opts...)
}
return sw.client.typedClient.PatchStatus(ctx, obj, patch, opts...)
}
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