public List<StreamServer> getAllStreamServers() { List<StreamServer> svlist = null; SqlSession sql = StreamManager.getSqlSessionFactory().openSession(TransactionIsolationLevel.SERIALIZABLE); try { StreamServerDao dao = sql.getMapper(StreamServerDao.class); svlist = dao.getAllStreamServers(); sql.commit(); } catch (Exception e) { sql.rollback(); e.printStackTrace(); } finally { sql.close(); } return svlist; }