public boolean loadQuestionRevision(HttpSession session, Long questionNumber) {

    String countryrevision = ConcurrencyKeys.COUNTRY_REVISION.toString();

    User usr = (User) session.getAttribute(SESSION_USER);
    String iso3 = UserUtil.getSingleIso3(usr);

    QuestionsUserTable qut = (QuestionsUserTable) context.getAttribute(USER_MAP_NAME);
    if (qut == null) {
      qut = new QuestionsUserTable();
      context.setAttribute(USER_MAP_NAME, qut);
      context.getAttribute(USER_MAP_NAME);
    }
    boolean amITheFirst = qut.amITheFirst(usr, questionNumber.intValue());
    qut.addUser(usr, questionNumber.intValue());

    session.removeAttribute(countryrevision);

    Question question = surveyService.findQuestion(questionNumber);
    Country countryEntity = surveyService.searchCountry(iso3);

    QuestionRevision qr = surveyService.getQuestionRevisionNumber(countryEntity, question);
    if (qr == null) {
      QuestionRevision qrNew = new QuestionRevision();
      qrNew.setVersion(0l);
      qrNew.setQuestion(question);
      qrNew.setCountry(countryEntity);
      surveyService.insertQuestionRevisionNumber(qrNew);
      qr = surveyService.getQuestionRevisionNumber(countryEntity, question);
    }
    session.setAttribute(countryrevision, qr);

    return amITheFirst;
  }
  @Override
  public boolean updateQuestionRevision(QuestionRevision revision) {

    QuestionRevision lastRevision =
        findQuestionRevision(revision.getCountry(), revision.getQuestion());
    Long version = lastRevision.getVersion();
    if (lastRevision.getVersion() <= revision.getVersion()) {
      if (!questionRevisionDAO.remove(revision)) {
        return false;
      } else {
        lastRevision.setVersion(version + 1);
        questionRevisionDAO.merge(lastRevision);
        return true;
      }
    }

    return false;
  }