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strategy.go
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strategy.go
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// Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 project
import (
"context"
"fmt"
"github.com/gardener/gardener/pkg/api"
"github.com/gardener/gardener/pkg/apis/core"
"github.com/gardener/gardener/pkg/apis/core/validation"
apiequality "k8s.io/apimachinery/pkg/api/equality"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/apiserver/pkg/registry/generic"
"k8s.io/apiserver/pkg/storage"
"k8s.io/apiserver/pkg/storage/names"
)
type projectStrategy struct {
runtime.ObjectTyper
names.NameGenerator
}
// Strategy defines the storage strategy for Projects.
var Strategy = projectStrategy{api.Scheme, names.SimpleNameGenerator}
func (projectStrategy) NamespaceScoped() bool {
return false
}
func (projectStrategy) PrepareForCreate(_ context.Context, obj runtime.Object) {
project := obj.(*core.Project)
project.Generation = 1
project.Status = core.ProjectStatus{}
}
func (projectStrategy) PrepareForUpdate(_ context.Context, obj, old runtime.Object) {
newProject := obj.(*core.Project)
oldProject := old.(*core.Project)
newProject.Status = oldProject.Status
if !apiequality.Semantic.DeepEqual(oldProject.Spec, newProject.Spec) {
newProject.Generation = oldProject.Generation + 1
}
}
func (projectStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
project := obj.(*core.Project)
return validation.ValidateProject(project)
}
func (projectStrategy) Canonicalize(obj runtime.Object) {
}
func (projectStrategy) AllowCreateOnUpdate() bool {
return false
}
func (projectStrategy) AllowUnconditionalUpdate() bool {
return true
}
func (projectStrategy) ValidateUpdate(ctx context.Context, newObj, oldObj runtime.Object) field.ErrorList {
oldProject, newProject := oldObj.(*core.Project), newObj.(*core.Project)
return validation.ValidateProjectUpdate(newProject, oldProject)
}
// WarningsOnCreate returns warnings to the client performing a create.
func (projectStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
return nil
}
// WarningsOnUpdate returns warnings to the client performing the update.
func (projectStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
return nil
}
type projectStatusStrategy struct {
projectStrategy
}
// StatusStrategy defines the storage strategy for the status subresource of Projects.
var StatusStrategy = projectStatusStrategy{Strategy}
func (projectStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
newProject := obj.(*core.Project)
oldProject := old.(*core.Project)
newProject.Spec = oldProject.Spec
}
func (projectStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
return validation.ValidateProjectStatusUpdate(obj.(*core.Project), old.(*core.Project))
}
// ToSelectableFields returns a field set that represents the object
// TODO: fields are not labels, and the validation rules for them do not apply.
func ToSelectableFields(project *core.Project) fields.Set {
// The purpose of allocation with a given number of elements is to reduce
// amount of allocations needed to create the fields.Set. If you add any
// field here or the number of object-meta related fields changes, this should
// be adjusted.
projectSpecificFieldsSet := make(fields.Set, 2)
projectSpecificFieldsSet[core.ProjectNamespace] = getNamespace(project)
return generic.AddObjectMetaFieldsSet(projectSpecificFieldsSet, &project.ObjectMeta, false)
}
// GetAttrs returns labels and fields of a given object for filtering purposes.
func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
project, ok := obj.(*core.Project)
if !ok {
return nil, nil, fmt.Errorf("not a project")
}
return project.ObjectMeta.Labels, ToSelectableFields(project), nil
}
// MatchProject returns a generic matcher for a given label and field selector.
func MatchProject(label labels.Selector, field fields.Selector) storage.SelectionPredicate {
return storage.SelectionPredicate{
Label: label,
Field: field,
GetAttrs: GetAttrs,
IndexFields: []string{core.ProjectNamespace},
}
}
// NamespaceTriggerFunc returns spec.namespace of given Project.
func NamespaceTriggerFunc(obj runtime.Object) string {
project, ok := obj.(*core.Project)
if !ok {
return ""
}
return getNamespace(project)
}
func getNamespace(project *core.Project) string {
if project.Spec.Namespace == nil {
return ""
}
return *project.Spec.Namespace
}