/
storage.go
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/
storage.go
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/*
Copyright 2019 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 storage
import (
"context"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apiserver/pkg/registry/generic"
genericregistry "k8s.io/apiserver/pkg/registry/generic/registry"
"k8s.io/apiserver/pkg/registry/rest"
"k8s.io/kubernetes/pkg/apis/flowcontrol"
"k8s.io/kubernetes/pkg/printers"
printersinternal "k8s.io/kubernetes/pkg/printers/internalversion"
printerstorage "k8s.io/kubernetes/pkg/printers/storage"
"k8s.io/kubernetes/pkg/registry/flowcontrol/prioritylevelconfiguration"
"sigs.k8s.io/structured-merge-diff/v4/fieldpath"
)
// PriorityLevelConfigurationStorage implements storage for priority level configuration.
type PriorityLevelConfigurationStorage struct {
PriorityLevelConfiguration *REST
Status *StatusREST
}
// REST implements a RESTStorage for priority level configuration against etcd
type REST struct {
*genericregistry.Store
}
// NewREST returns a RESTStorage object that will work against priority level configuration.
func NewREST(optsGetter generic.RESTOptionsGetter) (*REST, *StatusREST, error) {
store := &genericregistry.Store{
NewFunc: func() runtime.Object { return &flowcontrol.PriorityLevelConfiguration{} },
NewListFunc: func() runtime.Object { return &flowcontrol.PriorityLevelConfigurationList{} },
DefaultQualifiedResource: flowcontrol.Resource("prioritylevelconfigurations"),
SingularQualifiedResource: flowcontrol.Resource("prioritylevelconfiguration"),
CreateStrategy: prioritylevelconfiguration.Strategy,
UpdateStrategy: prioritylevelconfiguration.Strategy,
DeleteStrategy: prioritylevelconfiguration.Strategy,
ResetFieldsStrategy: prioritylevelconfiguration.Strategy,
TableConvertor: printerstorage.TableConvertor{TableGenerator: printers.NewTableGenerator().With(printersinternal.AddHandlers)},
}
options := &generic.StoreOptions{RESTOptions: optsGetter}
if err := store.CompleteWithOptions(options); err != nil {
return nil, nil, err
}
statusStore := *store
statusStore.CreateStrategy = nil
statusStore.UpdateStrategy = prioritylevelconfiguration.StatusStrategy
statusStore.DeleteStrategy = nil
statusStore.ResetFieldsStrategy = prioritylevelconfiguration.StatusStrategy
return &REST{store}, &StatusREST{store: &statusStore}, nil
}
// StatusREST implements the REST endpoint for changing the status of a priority level configuration.
type StatusREST struct {
store *genericregistry.Store
}
// New creates a new priority level configuration object.
func (r *StatusREST) New() runtime.Object {
return &flowcontrol.PriorityLevelConfiguration{}
}
// Destroy cleans up resources on shutdown.
func (r *StatusREST) Destroy() {
// Given that underlying store is shared with REST,
// we don't destroy it here explicitly.
}
// Get retrieves the object from the storage. It is required to support Patch.
func (r *StatusREST) Get(ctx context.Context, name string, options *metav1.GetOptions) (runtime.Object, error) {
return r.store.Get(ctx, name, options)
}
// Update alters the status subset of an object.
func (r *StatusREST) Update(ctx context.Context, name string, objInfo rest.UpdatedObjectInfo, createValidation rest.ValidateObjectFunc, updateValidation rest.ValidateObjectUpdateFunc, forceAllowCreate bool, options *metav1.UpdateOptions) (runtime.Object, bool, error) {
// We are explicitly setting forceAllowCreate to false in the call to the underlying storage because
// subresources should never allow create on update.
return r.store.Update(ctx, name, objInfo, createValidation, updateValidation, false, options)
}
// GetResetFields implements rest.ResetFieldsStrategy
func (r *StatusREST) GetResetFields() map[fieldpath.APIVersion]*fieldpath.Set {
return r.store.GetResetFields()
}
func (r *StatusREST) ConvertToTable(ctx context.Context, object runtime.Object, tableOptions runtime.Object) (*metav1.Table, error) {
return r.store.ConvertToTable(ctx, object, tableOptions)
}