Method SetUpdateCallback

watcher.go:143–148

SetUpdateCallback sets the callback function that the watcher will call when the policy in DB has been changed by other instances. A classic callback is Enforcer.LoadPolicy().

(callback func(string))

// when the policy in DB has been changed by other instances.
// A classic callback is Enforcer.LoadPolicy().
func (w *Watcher) SetUpdateCallback(callback func(string)) error {
	w.lock.Lock()
	defer w.lock.Unlock()
	w.callback = callback
	return nil
}

// Update calls the update callback of other instances to synchronize their policy.
// It is usually called after changing the policy in DB, like Enforcer.SavePolicy(),