func getFromCache(store cache.Store, kind, namespace, name string) (interface{}, error) {
key := cacheLookupKey(namespace, name)
obj, ok, er := store.Get(key)
if er != nil {
return nil, er
}
if !ok {
return nil, fmt.Errorf("Could not find %s %q", kind, key)
}
return obj, nil
}
// storeObjectUpdate updates given cache with a new object version from Informer
// callback (i.e. with events from etcd) or with an object modified by the
// controller itself. Returns "true", if the cache was updated, false if the
// object is an old version and should be ignored.
func storeObjectUpdate(store cache.Store, obj interface{}, className string) (bool, error) {
objName, err := controller.KeyFunc(obj)
if err != nil {
return false, fmt.Errorf("Couldn't get key for object %+v: %v", obj, err)
}
oldObj, found, err := store.Get(obj)
if err != nil {
return false, fmt.Errorf("Error finding %s %q in controller cache: %v", className, objName, err)
}
objAccessor, err := meta.Accessor(obj)
if err != nil {
return false, err
}
if !found {
// This is a new object
glog.V(4).Infof("storeObjectUpdate: adding %s %q, version %s", className, objName, objAccessor.GetResourceVersion())
if err = store.Add(obj); err != nil {
return false, fmt.Errorf("Error adding %s %q to controller cache: %v", className, objName, err)
}
return true, nil
}
oldObjAccessor, err := meta.Accessor(oldObj)
if err != nil {
return false, err
}
objResourceVersion, err := strconv.ParseInt(objAccessor.GetResourceVersion(), 10, 64)
if err != nil {
return false, fmt.Errorf("Error parsing ResourceVersion %q of %s %q: %s", objAccessor.GetResourceVersion(), className, objName, err)
}
oldObjResourceVersion, err := strconv.ParseInt(oldObjAccessor.GetResourceVersion(), 10, 64)
if err != nil {
return false, fmt.Errorf("Error parsing old ResourceVersion %q of %s %q: %s", oldObjAccessor.GetResourceVersion(), className, objName, err)
}
// Throw away only older version, let the same version pass - we do want to
// get periodic sync events.
if oldObjResourceVersion > objResourceVersion {
glog.V(4).Infof("storeObjectUpdate: ignoring %s %q version %s", className, objName, objAccessor.GetResourceVersion())
return false, nil
}
glog.V(4).Infof("storeObjectUpdate updating %s %q with version %s", className, objName, objAccessor.GetResourceVersion())
if err = store.Update(obj); err != nil {
return false, fmt.Errorf("Error updating %s %q in controller cache: %v", className, objName, err)
}
return true, nil
}