public int runAggregation(List<String> terminals) throws SQLException {
    long t0 = System.currentTimeMillis();

    int i = runSubPeriodAggregation(terminals);
    Session session = SessionFactoryController.getInstance().getSessionFactory().openSession();
    ScrollableResults scroll = getTerminals(session, terminals);
    try {
      while (scroll.next()) {
        long t1 = System.currentTimeMillis();

        OBPOSApplications terminal = (OBPOSApplications) scroll.get(0);
        checkLastDayPeriodAggregated(terminal);

        Date selectedPeriod = periodStart;
        Date firstPeriod = getFirstPeriodWithoutAggregation(terminal);

        for (Date period = firstPeriod; period
            .compareTo(selectedPeriod) <= 0; period = periodNext) {
          long t2 = System.currentTimeMillis();

          initPeriod(period);
          aggregatePeriod(terminal);

          OBDal.getInstance().getConnection(false).commit();
          OBDal.getInstance().getSession().clear();
          i++;

          log.debug("Aggregation for period {} took: {} ms.", period,
              System.currentTimeMillis() - t2);
        }
        log.debug("Aggregation for terminal {} took: {} ms.", terminal.getName(),
            System.currentTimeMillis() - t1);
      }
      log.debug("Aggregation took: {} ms.", System.currentTimeMillis() - t0);
    } finally {
      scroll.close();
      if (session.isOpen()) {
        session.close();
      }
    }

    return i;
  }