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Make EventPolicy EventHandler generic
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| /* | ||
| Copyright 2023 The Knative 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 reconciler | ||
|
|
||
| import ( | ||
| "strings" | ||
|
|
||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/runtime/schema" | ||
| "k8s.io/apimachinery/pkg/types" | ||
| "k8s.io/client-go/tools/cache" | ||
| "knative.dev/eventing/pkg/apis/eventing/v1alpha1" | ||
| ) | ||
|
|
||
| // enqueueApplyingResourcesOfEventPolicy checks if the given GVK is referenced in the given EventPolicy. | ||
| // If so, it enqueues it into the enqueueFn(). | ||
| func enqueueApplyingResourcesOfEventPolicy(indexer cache.Indexer, gvk schema.GroupVersionKind, policyObj interface{}, enqueueFn func(key types.NamespacedName)) { | ||
| eventPolicy, ok := policyObj.(*v1alpha1.EventPolicy) | ||
| if !ok { | ||
| return | ||
| } | ||
|
|
||
| for _, to := range eventPolicy.Spec.To { | ||
| if to.Ref != nil { | ||
| toGV, err := schema.ParseGroupVersion(to.Ref.APIVersion) | ||
| if err != nil { | ||
| continue | ||
| } | ||
|
|
||
| if strings.EqualFold(toGV.Group, gvk.Group) && | ||
| strings.EqualFold(to.Ref.Kind, gvk.Kind) { | ||
|
|
||
| enqueueFn(types.NamespacedName{ | ||
| Namespace: eventPolicy.Namespace, | ||
| Name: to.Ref.Name, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| if to.Selector != nil { | ||
| selectorGV, err := schema.ParseGroupVersion(to.Selector.APIVersion) | ||
| if err != nil { | ||
| continue | ||
| } | ||
|
|
||
| if strings.EqualFold(selectorGV.Group, gvk.Group) && | ||
| strings.EqualFold(to.Selector.Kind, gvk.Kind) { | ||
|
|
||
| selector, err := metav1.LabelSelectorAsSelector(to.Selector.LabelSelector) | ||
| if err != nil { | ||
| continue | ||
| } | ||
|
|
||
| resources := []metav1.Object{} | ||
| err = cache.ListAllByNamespace(indexer, eventPolicy.Namespace, selector, func(i interface{}) { | ||
| resources = append(resources, i.(metav1.Object)) | ||
| }) | ||
| if err != nil { | ||
| continue | ||
| } | ||
|
|
||
| for _, resource := range resources { | ||
| enqueueFn(types.NamespacedName{ | ||
| Namespace: resource.GetNamespace(), | ||
| Name: resource.GetName(), | ||
| }) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // EventPolicyEventHandler returns an ResourceEventHandler, which enqueues the referencing resources of the EventPolicy | ||
| // if the EventPolicy was referencing or got updated and now is referencing the resource of the given GVK. | ||
| func EventPolicyEventHandler(indexer cache.Indexer, gvk schema.GroupVersionKind, enqueueFn func(key types.NamespacedName)) cache.ResourceEventHandler { | ||
| return cache.ResourceEventHandlerFuncs{ | ||
| AddFunc: func(obj interface{}) { | ||
| enqueueApplyingResourcesOfEventPolicy(indexer, gvk, obj, enqueueFn) | ||
| }, | ||
| UpdateFunc: func(oldObj, newObj interface{}) { | ||
| // Here we need to check if the old or the new EventPolicy was referencing the InMemoryChannel | ||
|
|
||
| // make sure, we enqueue the keys only once | ||
| toEnqueue := map[types.NamespacedName]struct{}{} | ||
| addToEnqueueList := func(key types.NamespacedName) { | ||
| toEnqueue[key] = struct{}{} | ||
| } | ||
| enqueueApplyingResourcesOfEventPolicy(indexer, gvk, oldObj, addToEnqueueList) | ||
| enqueueApplyingResourcesOfEventPolicy(indexer, gvk, newObj, addToEnqueueList) | ||
|
|
||
| for k := range toEnqueue { | ||
| enqueueFn(k) | ||
| } | ||
| }, | ||
| DeleteFunc: func(obj interface{}) { | ||
| enqueueApplyingResourcesOfEventPolicy(indexer, gvk, obj, enqueueFn) | ||
| }, | ||
| } | ||
| } |
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