// http://docs.aws.amazon.com/AmazonS3/latest/dev/NotificationHowTo.html.
func (api objectAPIHandlers) PutBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
	ctx := newContext(r, w, "PutBucketNotification")

	defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))

	objectAPI := api.ObjectAPI()
	if objectAPI == nil {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)

			Queries("tagging", "")
		// PutBucketVersioning
		router.Methods(http.MethodPut).
			HandlerFunc(s3APIMiddleware(api.PutBucketVersioningHandler)).
			Queries("versioning", "")
		// PutBucketNotification
		router.Methods(http.MethodPut).
			HandlerFunc(s3APIMiddleware(api.PutBucketNotificationHandler)).
			Queries("notification", "")
		// ResetBucketReplicationStart - MinIO extension API

		case "GetBucketNotification":
			// Register GetBucketNotification Handler.
			bucket.Methods(http.MethodGet).HandlerFunc(api.GetBucketNotificationHandler).Queries("notification", "")
		case "PutBucketNotification":
			// Register PutBucketNotification Handler.
			bucket.Methods(http.MethodPut).HandlerFunc(api.PutBucketNotificationHandler).Queries("notification", "")
		case "ListenNotification":
			// Register ListenNotification Handler.