Hi,

Hibernate version:
3.2.0 cr2.

Name and version of the database you are using:
mysql 5.0

1. What is the difference between the 3 type transactions?

2. If I specify the following in my hibernate.cfg.xml file, which means hibernate will not use direct jdbc connection, how come I don't get error if i use Hibernate Transaction for begin and commit? I thought we will need to use UserTransaction for begin and commit? Not necessary is it?



3. Between, if i specify "org.hibernate.transaction.JTATransactionFactory" like in question 2, I find I can use jta or thread for the "current_session_context_class". Is this normal? Which one should I use?



Thank you.

Short answer, when using the JTATransaction factory hibernate will actually locate and begin the user transaction when you begin a hibernate transaction. If the user transaction is already in progress hibernate hooks in with it.

Have a look at the begin method of the JTATransaction http://fisheye.jboss.org/browse/~raw,r= ... ction.java

My understanding is that if you're always running in a JTA environment you can basically use Hibernate Transactions and User Transaction interchangeably.

I see, thanks for the short explanation but it make sense to me. :)

How about "hibernate.current_session_context_class", should I put it as "thread" or "jta"? both does not give any error.

Thank you.