@Transactional
  private void handle(PrimaryStorageReportCapacityMsg msg) {
    PrimaryStorageCapacityVO vo =
        dbf.getEntityManager()
            .find(PrimaryStorageCapacityVO.class, self.getUuid(), LockModeType.PESSIMISTIC_WRITE);
    if (vo.getTotalCapacity() == 0) {
      vo.setTotalCapacity(msg.getTotalCapacity());
      vo.setAvailableCapacity(msg.getAvailableCapacity());
      dbf.getEntityManager().merge(vo);
    }

    PrimaryStorageReportCapacityReply reply = new PrimaryStorageReportCapacityReply();
    bus.reply(msg, reply);
  }