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Add new ResourceEventHandlerFuncs to federated informer

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This commit is contained in:
shashidharatd 2017-02-08 16:45:39 +05:30
parent 58b2cce95e
commit b28f41eb02
1 changed files with 32 additions and 0 deletions
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32
federation/pkg/federation-controller/util/handlers.go
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@ -77,3 +77,35 @@ func NewTriggerOnMetaAndSpecChanges(triggerFunc func(pkgruntime.Object)) *cache.
},
}
}
// Returns cache.ResourceEventHandlerFuncs that trigger the given function
// on object add/delete or ObjectMeta or given field is updated.
func NewTriggerOnMetaAndFieldChanges(field string, 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").(metav1.ObjectMeta)
curMeta := getFieldOrPanic(cur, "ObjectMeta").(metav1.ObjectMeta)
if !ObjectMetaEquivalent(oldMeta, curMeta) ||
!reflect.DeepEqual(getFieldOrPanic(old, field), getFieldOrPanic(cur, field)) {
triggerFunc(curObj)
}
},
}
}