/** * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/xml;charset=UTF-8"); response.setHeader("Content-Disposition", "attachment; filename=export.xml"); PrintWriter out = response.getWriter(); try { DatabaseWrapper db = new DatabaseWrapper(); // fill database wrapper with data db.setUsers(userMgr.findAll()); db.setBooks(bookMgr.findAll()); db.setAuthors(authorMgr.findAll()); db.setBookings(bookingMgr.findAll()); db.setBorrows(borrowMgr.findAll()); db.setExemplars(exemplarMgr.findAll()); db.setGenres(genreMgr.findAll()); db.setPublishers(publisherMgr.findAll()); // Step 2 - convert to xml JAXBContext jaxbContext = JAXBContext.newInstance(DatabaseWrapper.class); Marshaller marshaller = jaxbContext.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); marshaller.marshal(db, out); } catch (Exception ex) { ex.printStackTrace(out); } finally { out.close(); } }
/** * File upload listener * * @param event * @throws Exception */ public void listener(FileUploadEvent event) throws Exception { UploadedFile file = event.getUploadedFile(); try { DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder dBuilder = dbFactory.newDocumentBuilder(); Document doc = dBuilder.parse(file.getInputStream()); doc.getDocumentElement().normalize(); processUsers(doc.getElementsByTagName("users")); processAuthors(doc.getElementsByTagName("authors")); processPublishers(doc.getElementsByTagName("publishers")); processGenres(doc.getElementsByTagName("genres")); processBooks(doc.getElementsByTagName("books")); processExemplars(doc.getElementsByTagName("exemplars")); processBookings(doc.getElementsByTagName("bookings")); processBorrows(doc.getElementsByTagName("borrows")); userMgr.flush(); bookMgr.flush(); authorMgr.flush(); bookingMgr.flush(); exemplarMgr.flush(); genreMgr.flush(); publisherMgr.flush(); borrowMgr.flush(); userMgr.clear(); bookMgr.clear(); authorMgr.clear(); bookingMgr.clear(); exemplarMgr.clear(); genreMgr.clear(); publisherMgr.clear(); borrowMgr.clear(); } catch (Exception e) { FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("Import se nezdařil.")); e.printStackTrace(System.out); return; } FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("Import proběhl úspěšně.")); }