/**
* 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."));
}
/**
* Import bookings
*
* @param nodes
* @return
*/
private Boolean processBookings(NodeList nodes) {
NodeList bookings = nodes.item(0).getChildNodes();
for (int i = 0; i < bookings.getLength(); i++) {
if (bookings.item(i).getNodeType() == Node.ELEMENT_NODE) {
Element bookingNode = (Element) bookings.item(i);
Booking booking = new Booking();
booking.setIdbooking(Integer.parseInt(getTagValue("idbooking", bookingNode)));
booking.setState(Integer.parseInt(getTagValue("state", bookingNode)));
booking.setDate(
DatatypeConverter.parseDateTime(getTagValue("date", bookingNode)).getTime());
Book book = bookMgr.findByIdbook(Integer.parseInt(getTagValue("book", bookingNode)));
if (book == null) {
continue;
}
booking.setBook(book);
User user = userMgr.findByIduser(Integer.parseInt(getTagValue("user", bookingNode)));
if (user == null) {
continue;
}
booking.setUser(user);
try {
bookingMgr.Save(booking);
} catch (EJBException ex) {
ex.printStackTrace(System.out);
}
}
}
return true;
}
