Hibernate事务引发另一个事务的异常

Question

I'm trying to save data using Hibernate. Everything happens within the same session. The logic is following :

1) Begin a transaction and try to save :

try
{

  session.getTransaction().begin();
  session.save(result);
  session.getTransaction().commit();
}
catch (Exception e)
{
  session.getTransaction().rollback();
  throw e;
}

2) If a new record violates integrity constraint catch an exception in the outer wrapper method, open another transaction and query more data

catch (ConstraintViolationException e)
{
  if ("23000".equals(e.getSQLException().getSQLState()))
  {
    ...

    session.getTransaction().begin();
    Query query = session.createQuery("from Appointment a where a.begin >= :begin and a.end <= :end");
    query.setDate("begin", date);
    query.setDate("end", DateUtils.addDays(date, 1));

    List results = query.list();
    session.getTransaction().commit();

The problem is when the second transaction performs query.list it throws an exception that should'be been linked with the previous transaction.

SQLIntegrityConstraintViolationException: ORA-00001: unique constraint

Should I query data from another session or what's the other way to isolate two transactions from each other?

Thanks!

Answer 1

You should not use the same session if you get an exception, you have to close the session and use a different session for your second operation. This is given in hibernate documentation:

13.2.3 Exception Handling

If the Session throws an exception, including any SQLException, immediately rollback the database transaction, call Session.close() and discard the Session instance. Certain methods of Session will not leave the session in a consistent state. No exception thrown by Hibernate can be treated as recoverable. Ensure that the Session will be closed by calling close() in a finally block.

Answer 2

希望Exception类是所有类型的异常的基础，因此，如果将Exception类放置在始终被捕获之前，并且将隔离其余的异常处理，则该类为例外。

Answer 3

Can you try to replce session.save() with session.persist method, hope this might resolve your problem. Refer following link for more details about both methods.

What's the advantage of persist() vs save() in Hibernate?