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replenishment_controller.go
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/
replenishment_controller.go
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package controller
import (
"fmt"
"reflect"
"k8s.io/client-go/tools/cache"
kexternalinformers "k8s.io/kubernetes/pkg/client/informers/informers_generated/externalversions"
kresourcequota "k8s.io/kubernetes/pkg/controller/resourcequota"
imageapi "github.com/openshift/origin/pkg/image/apis/image"
imageinternalversion "github.com/openshift/origin/pkg/image/generated/informers/internalversion/image/internalversion"
)
// replenishmentControllerFactory implements ReplenishmentControllerFactory
type replenishmentControllerFactory struct {
isInformer imageinternalversion.ImageStreamInformer
}
var _ kresourcequota.ReplenishmentControllerFactory = &replenishmentControllerFactory{}
// NewReplenishmentControllerFactory returns a factory that knows how to build controllers
// to replenish resources when updated or deleted
func NewReplenishmentControllerFactory(isInformer imageinternalversion.ImageStreamInformer) kresourcequota.ReplenishmentControllerFactory {
return &replenishmentControllerFactory{
isInformer: isInformer,
}
}
func (r *replenishmentControllerFactory) NewController(options *kresourcequota.ReplenishmentControllerOptions) (cache.Controller, error) {
gk := options.GroupKind
switch {
case imageapi.IsKindOrLegacy("ImageStream", gk):
r.isInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
UpdateFunc: ImageStreamReplenishmentUpdateFunc(options),
DeleteFunc: kresourcequota.ObjectReplenishmentDeleteFunc(options),
})
return r.isInformer.Informer().GetController(), nil
default:
return nil, fmt.Errorf("no replenishment controller available for %s", gk)
}
}
// ImageStreamReplenishmentUpdateFunc will replenish if the old image stream was quota tracked but the new is not
func ImageStreamReplenishmentUpdateFunc(options *kresourcequota.ReplenishmentControllerOptions) func(oldObj, newObj interface{}) {
return func(oldObj, newObj interface{}) {
oldIS := oldObj.(*imageapi.ImageStream)
newIS := newObj.(*imageapi.ImageStream)
if !reflect.DeepEqual(oldIS.Status.Tags, newIS.Status.Tags) {
options.ReplenishmentFunc(options.GroupKind, newIS.Namespace, newIS)
}
}
}
// NewAllResourceReplenishmentControllerFactory returns a ReplenishmentControllerFactory that knows how to replenish all known resources
func NewAllResourceReplenishmentControllerFactory(informerFactory kexternalinformers.SharedInformerFactory, imageStreamInformer imageinternalversion.ImageStreamInformer) kresourcequota.ReplenishmentControllerFactory {
return kresourcequota.UnionReplenishmentControllerFactory{
kresourcequota.NewReplenishmentControllerFactory(informerFactory),
NewReplenishmentControllerFactory(imageStreamInformer),
}
}