Hibernate transaction advice [closed]

Question

I'm new to Hibernate so I need some advice/direction on doing Transactions.

I have a DAO like

public class MyDao extends HibernateDaoSupport implements IMyDao {

 @Override
 public Foo getFoo(int id) {

  return (Foo)getHibernateTemplate().load(Foo.class, id);

 }
}

With this setup (using HibernateDaoSupport), will Hibernate/Spring handle transactions for me? Some of the examples I see say yes, others show using

Transaction tx = getHibernateTemplate().getSessionFactory().getCurrentSession().beginTransaction();

to get a Transaction in every DAO method.

Right now I'm assuming my minimal DAO is correct but I want to do a "larger" transaction that includes a couple of Hibernate calls in one method. Would I use the manual Transaction method there? Do I have to use it everywhere? Thanks.

Answer 1

In general, you should never handle transactions in dao code, as you never know where the transaction boundary is. You should let whoever wants to control the transactions control them.

Code that starts and commits a transaction in every dao method is likely to be problematic.

Btw: not very keen at all on 'dao' but as you use it, so will i.

Answer 2

I would personally introduce spring and their hibernate support into your application then you can use there hibernate transaction manager and define transactions in the xml file and then forget about them in the actual code