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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 controllerregistration
import (
"context"
"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/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/apiserver/pkg/storage/names"
)
type controllerRegistrationStrategy struct {
runtime.ObjectTyper
names.NameGenerator
}
// Strategy defines the storage strategy for ControllerRegistrations.
var Strategy = controllerRegistrationStrategy{api.Scheme, names.SimpleNameGenerator}
func (controllerRegistrationStrategy) NamespaceScoped() bool {
return false
}
func (controllerRegistrationStrategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
controllerRegistration := obj.(*core.ControllerRegistration)
controllerRegistration.Generation = 1
}
func (controllerRegistrationStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
newControllerRegistration := obj.(*core.ControllerRegistration)
oldControllerRegistration := old.(*core.ControllerRegistration)
if mustIncreaseGeneration(oldControllerRegistration, newControllerRegistration) {
newControllerRegistration.Generation = oldControllerRegistration.Generation + 1
}
}
func mustIncreaseGeneration(oldControllerRegistration, newControllerRegistration *core.ControllerRegistration) bool {
// The ControllerRegistration specification changes.
if !apiequality.Semantic.DeepEqual(oldControllerRegistration.Spec, newControllerRegistration.Spec) {
return true
}
// The deletion timestamp was set.
if oldControllerRegistration.DeletionTimestamp == nil && newControllerRegistration.DeletionTimestamp != nil {
return true
}
return false
}
func (controllerRegistrationStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
controllerRegistration := obj.(*core.ControllerRegistration)
return validation.ValidateControllerRegistration(controllerRegistration)
}
func (controllerRegistrationStrategy) Canonicalize(obj runtime.Object) {
}
func (controllerRegistrationStrategy) AllowCreateOnUpdate() bool {
return false
}
func (controllerRegistrationStrategy) ValidateUpdate(ctx context.Context, newObj, oldObj runtime.Object) field.ErrorList {
newControllerRegistration := newObj.(*core.ControllerRegistration)
oldControllerRegistration := oldObj.(*core.ControllerRegistration)
return validation.ValidateControllerRegistrationUpdate(newControllerRegistration, oldControllerRegistration)
}
func (controllerRegistrationStrategy) AllowUnconditionalUpdate() bool {
return false
}