k8s.io/kubernetes@v1.31.0-alpha.0.0.20240520171757-56147500dadc/pkg/registry/core/event/strategy.go (about) 1 /* 2 Copyright 2014 The Kubernetes Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package event 18 19 import ( 20 "context" 21 "fmt" 22 23 "k8s.io/apimachinery/pkg/fields" 24 "k8s.io/apimachinery/pkg/labels" 25 "k8s.io/apimachinery/pkg/runtime" 26 "k8s.io/apimachinery/pkg/runtime/schema" 27 "k8s.io/apimachinery/pkg/util/validation/field" 28 genericapirequest "k8s.io/apiserver/pkg/endpoints/request" 29 "k8s.io/apiserver/pkg/registry/generic" 30 "k8s.io/apiserver/pkg/registry/rest" 31 "k8s.io/apiserver/pkg/storage" 32 "k8s.io/apiserver/pkg/storage/names" 33 "k8s.io/kubernetes/pkg/api/legacyscheme" 34 api "k8s.io/kubernetes/pkg/apis/core" 35 "k8s.io/kubernetes/pkg/apis/core/validation" 36 ) 37 38 type eventStrategy struct { 39 runtime.ObjectTyper 40 names.NameGenerator 41 } 42 43 // Strategy is the default logic that applies when creating and updating 44 // Event objects via the REST API. 45 var Strategy = eventStrategy{legacyscheme.Scheme, names.SimpleNameGenerator} 46 47 func (eventStrategy) DefaultGarbageCollectionPolicy(ctx context.Context) rest.GarbageCollectionPolicy { 48 return rest.Unsupported 49 } 50 51 func (eventStrategy) NamespaceScoped() bool { 52 return true 53 } 54 55 func (eventStrategy) PrepareForCreate(ctx context.Context, obj runtime.Object) { 56 } 57 58 func (eventStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) { 59 } 60 61 func (eventStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList { 62 groupVersion := requestGroupVersion(ctx) 63 event := obj.(*api.Event) 64 return validation.ValidateEventCreate(event, groupVersion) 65 } 66 67 // WarningsOnCreate returns warnings for the creation of the given object. 68 func (eventStrategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil } 69 70 // Canonicalize normalizes the object after validation. 71 func (eventStrategy) Canonicalize(obj runtime.Object) { 72 } 73 74 func (eventStrategy) AllowCreateOnUpdate() bool { 75 return true 76 } 77 78 func (eventStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList { 79 groupVersion := requestGroupVersion(ctx) 80 event := obj.(*api.Event) 81 oldEvent := old.(*api.Event) 82 return validation.ValidateEventUpdate(event, oldEvent, groupVersion) 83 } 84 85 // WarningsOnUpdate returns warnings for the given update. 86 func (eventStrategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string { 87 return nil 88 } 89 90 func (eventStrategy) AllowUnconditionalUpdate() bool { 91 return true 92 } 93 94 // GetAttrs returns labels and fields of a given object for filtering purposes. 95 func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) { 96 event, ok := obj.(*api.Event) 97 if !ok { 98 return nil, nil, fmt.Errorf("not an event") 99 } 100 return labels.Set(event.Labels), ToSelectableFields(event), nil 101 } 102 103 // Matcher returns a selection predicate for a given label and field selector. 104 func Matcher(label labels.Selector, field fields.Selector) storage.SelectionPredicate { 105 return storage.SelectionPredicate{ 106 Label: label, 107 Field: field, 108 GetAttrs: GetAttrs, 109 } 110 } 111 112 // ToSelectableFields returns a field set that represents the object. 113 func ToSelectableFields(event *api.Event) fields.Set { 114 objectMetaFieldsSet := generic.ObjectMetaFieldsSet(&event.ObjectMeta, true) 115 source := event.Source.Component 116 if source == "" { 117 source = event.ReportingController 118 } 119 specificFieldsSet := fields.Set{ 120 "involvedObject.kind": event.InvolvedObject.Kind, 121 "involvedObject.namespace": event.InvolvedObject.Namespace, 122 "involvedObject.name": event.InvolvedObject.Name, 123 "involvedObject.uid": string(event.InvolvedObject.UID), 124 "involvedObject.apiVersion": event.InvolvedObject.APIVersion, 125 "involvedObject.resourceVersion": event.InvolvedObject.ResourceVersion, 126 "involvedObject.fieldPath": event.InvolvedObject.FieldPath, 127 "reason": event.Reason, 128 "reportingComponent": event.ReportingController, // use the core/v1 field name 129 "source": source, 130 "type": event.Type, 131 } 132 return generic.MergeFieldsSets(specificFieldsSet, objectMetaFieldsSet) 133 } 134 135 // requestGroupVersion returns the group/version associated with the given context, or a zero-value group/version. 136 func requestGroupVersion(ctx context.Context) schema.GroupVersion { 137 if requestInfo, found := genericapirequest.RequestInfoFrom(ctx); found { 138 return schema.GroupVersion{Group: requestInfo.APIGroup, Version: requestInfo.APIVersion} 139 } 140 return schema.GroupVersion{} 141 }