try {
String fileName = "";
listener = new AjaxFileUploadListener(request.getContentLength());
FileItemFactory factory = new MonitoredDiskFileItemFactory(listener);
fieldName = request.getParameter("fieldName");
Enumeration params = request.getParameterNames();
session.setAttribute("FILE_UPLOAD_STATS_" + fieldName, listener.getFileUploadStats());
ServletFileUpload upload = new ServletFileUpload(factory);