1/* 2Copyright 2016 The Kubernetes Authors. 3 4Licensed under the Apache License, Version 2.0 (the "License"); 5you may not use this file except in compliance with the License. 6You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10Unless required by applicable law or agreed to in writing, software 11distributed under the License is distributed on an "AS IS" BASIS, 12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13See the License for the specific language governing permissions and 14limitations under the License. 15*/ 16 17package v1 18 19import ( 20 "fmt" 21 22 "k8s.io/api/core/v1" 23 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 24 "k8s.io/apimachinery/pkg/fields" 25 "k8s.io/apimachinery/pkg/runtime" 26 "k8s.io/apimachinery/pkg/types" 27 ref "k8s.io/client-go/tools/reference" 28) 29 30// The EventExpansion interface allows manually adding extra methods to the EventInterface. 31type EventExpansion interface { 32 // CreateWithEventNamespace is the same as a Create, except that it sends the request to the event.Namespace. 33 CreateWithEventNamespace(event *v1.Event) (*v1.Event, error) 34 // UpdateWithEventNamespace is the same as a Update, except that it sends the request to the event.Namespace. 35 UpdateWithEventNamespace(event *v1.Event) (*v1.Event, error) 36 PatchWithEventNamespace(event *v1.Event, data []byte) (*v1.Event, error) 37 // Search finds events about the specified object 38 Search(scheme *runtime.Scheme, objOrRef runtime.Object) (*v1.EventList, error) 39 // Returns the appropriate field selector based on the API version being used to communicate with the server. 40 // The returned field selector can be used with List and Watch to filter desired events. 41 GetFieldSelector(involvedObjectName, involvedObjectNamespace, involvedObjectKind, involvedObjectUID *string) fields.Selector 42} 43 44// CreateWithEventNamespace makes a new event. Returns the copy of the event the server returns, 45// or an error. The namespace to create the event within is deduced from the 46// event; it must either match this event client's namespace, or this event 47// client must have been created with the "" namespace. 48func (e *events) CreateWithEventNamespace(event *v1.Event) (*v1.Event, error) { 49 if e.ns != "" && event.Namespace != e.ns { 50 return nil, fmt.Errorf("can't create an event with namespace '%v' in namespace '%v'", event.Namespace, e.ns) 51 } 52 result := &v1.Event{} 53 err := e.client.Post(). 54 NamespaceIfScoped(event.Namespace, len(event.Namespace) > 0). 55 Resource("events"). 56 Body(event). 57 Do(). 58 Into(result) 59 return result, err 60} 61 62// UpdateWithEventNamespace modifies an existing event. It returns the copy of the event that the server returns, 63// or an error. The namespace and key to update the event within is deduced from the event. The 64// namespace must either match this event client's namespace, or this event client must have been 65// created with the "" namespace. Update also requires the ResourceVersion to be set in the event 66// object. 67func (e *events) UpdateWithEventNamespace(event *v1.Event) (*v1.Event, error) { 68 result := &v1.Event{} 69 err := e.client.Put(). 70 NamespaceIfScoped(event.Namespace, len(event.Namespace) > 0). 71 Resource("events"). 72 Name(event.Name). 73 Body(event). 74 Do(). 75 Into(result) 76 return result, err 77} 78 79// PatchWithEventNamespace modifies an existing event. It returns the copy of 80// the event that the server returns, or an error. The namespace and name of the 81// target event is deduced from the incompleteEvent. The namespace must either 82// match this event client's namespace, or this event client must have been 83// created with the "" namespace. 84func (e *events) PatchWithEventNamespace(incompleteEvent *v1.Event, data []byte) (*v1.Event, error) { 85 if e.ns != "" && incompleteEvent.Namespace != e.ns { 86 return nil, fmt.Errorf("can't patch an event with namespace '%v' in namespace '%v'", incompleteEvent.Namespace, e.ns) 87 } 88 result := &v1.Event{} 89 err := e.client.Patch(types.StrategicMergePatchType). 90 NamespaceIfScoped(incompleteEvent.Namespace, len(incompleteEvent.Namespace) > 0). 91 Resource("events"). 92 Name(incompleteEvent.Name). 93 Body(data). 94 Do(). 95 Into(result) 96 return result, err 97} 98 99// Search finds events about the specified object. The namespace of the 100// object must match this event's client namespace unless the event client 101// was made with the "" namespace. 102func (e *events) Search(scheme *runtime.Scheme, objOrRef runtime.Object) (*v1.EventList, error) { 103 ref, err := ref.GetReference(scheme, objOrRef) 104 if err != nil { 105 return nil, err 106 } 107 if e.ns != "" && ref.Namespace != e.ns { 108 return nil, fmt.Errorf("won't be able to find any events of namespace '%v' in namespace '%v'", ref.Namespace, e.ns) 109 } 110 stringRefKind := string(ref.Kind) 111 var refKind *string 112 if stringRefKind != "" { 113 refKind = &stringRefKind 114 } 115 stringRefUID := string(ref.UID) 116 var refUID *string 117 if stringRefUID != "" { 118 refUID = &stringRefUID 119 } 120 fieldSelector := e.GetFieldSelector(&ref.Name, &ref.Namespace, refKind, refUID) 121 return e.List(metav1.ListOptions{FieldSelector: fieldSelector.String()}) 122} 123 124// Returns the appropriate field selector based on the API version being used to communicate with the server. 125// The returned field selector can be used with List and Watch to filter desired events. 126func (e *events) GetFieldSelector(involvedObjectName, involvedObjectNamespace, involvedObjectKind, involvedObjectUID *string) fields.Selector { 127 apiVersion := e.client.APIVersion().String() 128 field := fields.Set{} 129 if involvedObjectName != nil { 130 field[GetInvolvedObjectNameFieldLabel(apiVersion)] = *involvedObjectName 131 } 132 if involvedObjectNamespace != nil { 133 field["involvedObject.namespace"] = *involvedObjectNamespace 134 } 135 if involvedObjectKind != nil { 136 field["involvedObject.kind"] = *involvedObjectKind 137 } 138 if involvedObjectUID != nil { 139 field["involvedObject.uid"] = *involvedObjectUID 140 } 141 return field.AsSelector() 142} 143 144// Returns the appropriate field label to use for name of the involved object as per the given API version. 145func GetInvolvedObjectNameFieldLabel(version string) string { 146 return "involvedObject.name" 147} 148 149// TODO: This is a temporary arrangement and will be removed once all clients are moved to use the clientset. 150type EventSinkImpl struct { 151 Interface EventInterface 152} 153 154func (e *EventSinkImpl) Create(event *v1.Event) (*v1.Event, error) { 155 return e.Interface.CreateWithEventNamespace(event) 156} 157 158func (e *EventSinkImpl) Update(event *v1.Event) (*v1.Event, error) { 159 return e.Interface.UpdateWithEventNamespace(event) 160} 161 162func (e *EventSinkImpl) Patch(event *v1.Event, data []byte) (*v1.Event, error) { 163 return e.Interface.PatchWithEventNamespace(event, data) 164} 165