@Override
  @Transactional
  public Application start(Application application) throws ServiceException {
    try {
      User user = authentificationUtils.getAuthentificatedUser();
      logger.debug("start : Methods parameters : " + application);

      List<Module> modules = application.getModules();
      for (Module module : modules) {
        try {
          module = moduleService.startModule(module);
        } catch (ServiceException e) {
          logger.error("failed to start " + application.toString(), e);
        }
      }
      List<Server> servers = application.getServers();
      for (Server server : servers) {
        logger.info("old server ip : " + server.getContainerIP());
        server = serverService.startServer(server);
      }

      if (application.getAliases() != null && !application.getAliases().isEmpty()) {
        updateAliases(application);
      }
      logger.info("ApplicationService : Application successfully started ");
    } catch (PersistenceException e) {
      throw new ServiceException(e.getLocalizedMessage(), e);
    }
    return application;
  }