79 lines
2.4 KiB
Go
79 lines
2.4 KiB
Go
/*
|
|
Copyright 2016 The Kubernetes 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 util
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
|
|
pkgruntime "k8s.io/apimachinery/pkg/runtime"
|
|
apiv1 "k8s.io/kubernetes/pkg/api/v1"
|
|
"k8s.io/kubernetes/pkg/client/cache"
|
|
)
|
|
|
|
// Returns cache.ResourceEventHandlerFuncs that trigger the given function
|
|
// on all object changes.
|
|
func NewTriggerOnAllChanges(triggerFunc func(pkgruntime.Object)) *cache.ResourceEventHandlerFuncs {
|
|
return &cache.ResourceEventHandlerFuncs{
|
|
DeleteFunc: func(old interface{}) {
|
|
oldObj := old.(pkgruntime.Object)
|
|
triggerFunc(oldObj)
|
|
},
|
|
AddFunc: func(cur interface{}) {
|
|
curObj := cur.(pkgruntime.Object)
|
|
triggerFunc(curObj)
|
|
},
|
|
UpdateFunc: func(old, cur interface{}) {
|
|
curObj := cur.(pkgruntime.Object)
|
|
if !reflect.DeepEqual(old, cur) {
|
|
triggerFunc(curObj)
|
|
}
|
|
},
|
|
}
|
|
}
|
|
|
|
// Returns cache.ResourceEventHandlerFuncs that trigger the given function
|
|
// on object add and delete as well as spec/object meta on update.
|
|
func NewTriggerOnMetaAndSpecChanges(triggerFunc func(pkgruntime.Object)) *cache.ResourceEventHandlerFuncs {
|
|
getFieldOrPanic := func(obj interface{}, fieldName string) interface{} {
|
|
val := reflect.ValueOf(obj).Elem().FieldByName(fieldName)
|
|
if val.IsValid() {
|
|
return val.Interface()
|
|
} else {
|
|
panic(fmt.Errorf("field not found: %s", fieldName))
|
|
}
|
|
}
|
|
return &cache.ResourceEventHandlerFuncs{
|
|
DeleteFunc: func(old interface{}) {
|
|
oldObj := old.(pkgruntime.Object)
|
|
triggerFunc(oldObj)
|
|
},
|
|
AddFunc: func(cur interface{}) {
|
|
curObj := cur.(pkgruntime.Object)
|
|
triggerFunc(curObj)
|
|
},
|
|
UpdateFunc: func(old, cur interface{}) {
|
|
curObj := cur.(pkgruntime.Object)
|
|
oldMeta := getFieldOrPanic(old, "ObjectMeta").(apiv1.ObjectMeta)
|
|
curMeta := getFieldOrPanic(cur, "ObjectMeta").(apiv1.ObjectMeta)
|
|
if !ObjectMetaEquivalent(oldMeta, curMeta) ||
|
|
!reflect.DeepEqual(getFieldOrPanic(old, "Spec"), getFieldOrPanic(cur, "Spec")) {
|
|
triggerFunc(curObj)
|
|
}
|
|
},
|
|
}
|
|
}
|