func (evnot *EventNotifier) AddRulesMap(bucketName string, rulesMap event.RulesMap) {
	evnot.Lock()
	defer evnot.Unlock()

	rulesMap = rulesMap.Clone()

	// Do not add for an empty rulesMap.
	if len(rulesMap) == 0 {
		delete(evnot.bucketRulesMap, bucketName)
	} else {
		evnot.bucketRulesMap[bucketName] = rulesMap
	}
}