transaction data 를 que에 넣어 두었다가 특정시간 지나면 그 que 를 처리 private static BlockingQueue notificationQueue = null;private Handler batchHandler;private AtomicReference pendingNotification = new AtomicReference(null);NotifiedData pending = null; notificationQueue = new LinkedBlockingQueue(MAX_QUEUE_SIZE); notificationProcessor = new NotificationProcessor(this); batchHandler = new Handler(Looper...