Hibernate and JDBC in one transaction

Question

I have a method, marked as @Transactional. It consists of several functions, one of them uses JDBC and the second one - Hibernate, third - JDBC. The problem is that changes,

Answer 1

The problem is, the operations on Hibernate engine does not result in immediate SQL execution. You can trigger it manually calling flush on Hibernate session. Then the changes made in hibernate will be visible to the SQL code within the same transaction. As long as you do DataSourceUtils.getConnection to get SQL connection, because only then you'll have them run in the same transaction...

In the opposite direction, this is more tricky, because you have 1nd level cache (session cache), and possibly also 2nd level cache. With 2nd level cache all changes made to database will be invisible to the Hibernate, if the row is cached, until the cache expires.