EntityManagerSessionImpl.java 文件源码

public void flush() {
  if (entityManager != null && (!handleTransactions || isTransactionActive()) ) {
    try {
      entityManager.flush();
    } catch (IllegalStateException ise) {
      throw new ActivitiException("Error while flushing EntityManager, illegal state", ise);
    } catch (TransactionRequiredException tre) {
      throw new ActivitiException("Cannot flush EntityManager, an active transaction is required", tre);
    } catch (PersistenceException pe) {
      throw new ActivitiException("Error while flushing EntityManager: " + pe.getMessage(), pe);
    }
  }
}