rulesMap[eventName] = rules.Union(rulesMap[eventName])
	}
}

// Remove - removes given rules map.
func (rulesMap RulesMap) Remove(rulesMap2 RulesMap) {
	for eventName, rules := range rulesMap {
		if nr := rules.Difference(rulesMap2[eventName]); len(nr) != 0 {
			rulesMap[eventName] = nr
		} else {
			delete(rulesMap, eventName)
		}
	}
}

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
	}
}

		rulesMap       RulesMap
		rulesMapToAdd  RulesMap
		expectedResult RulesMap
	}{
		{rulesMapCase1, rulesMapToAddCase1, expectedResultCase1},
		{rulesMapCase2, rulesMapToAddCase2, expectedResultCase2},
		{rulesMapCase3, rulesMapToAddCase3, expectedResultCase3},
	}

	for i, testCase := range testCases {
		testCase.rulesMap.Remove(testCase.rulesMapToAdd)

		if !reflect.DeepEqual(testCase.rulesMap, testCase.expectedResult) {

		conf.QueueList[i].SetRegion(region)
	}
}

// ToRulesMap - converts all queue configuration to RulesMap.
func (conf *Config) ToRulesMap() RulesMap {
	rulesMap := make(RulesMap)

	for _, queue := range conf.QueueList {
		rulesMap.Add(queue.ToRulesMap())
	}

	return rulesMap
}

// ParseConfig - parses data in reader to notification configuration.

		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	rulesMap := config.ToRulesMap()
	globalEventNotifier.AddRulesMap(bucketName, rulesMap)

	writeSuccessResponseHeadersOnly(w)

	}

	if bucketName != "" {
		if _, err := objAPI.GetBucketInfo(ctx, bucketName, BucketOptions{}); err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
	}

	rulesMap := event.NewRulesMap(eventNames, pattern, event.TargetID{ID: mustGetUUID()})

	setEventStreamHeaders(w)

	// Listen Publisher and peer-listen-client uses nonblocking send and hence does not wait for slow receivers.