SFSB > SessionFactory > DAO

kaypee · **Joined:** Tue Jun 29, 2004 5:04 am **Posts:** 8

Hi All!

I have written a POJO, and a DAO for every POJO.

I access the DAO from a StateFul Session Bean(SFSB).

Code:

e.g.
======
Session mySession = SessionFactory.getSession();
DepartmentDAO deptDAO = new DepartmentDAO( mySession );
EmployeeDAO empDAO = new EmployeeDAO( mySession );

Transaction transaction = mySession.beginTransaction();
try
{
empDAO.saveEmployee( new Employee(...) );
deptDAO.save( new Department(...) );
transaction.commit()
}
catch( DAOException exc )
{
transaction.rollback();
}
======

Now, when I do the above from a method in a SFSB, do I need to worry about ThreadLocal session.

Also, what happens, when I define the session as an instance variable, instead of a method variable ?

TIA,

Kunal

emmanuel · **Posted:** Mon Jul 12, 2004 1:27 pm

I don't know what SessionFactory does but if you open and close the session explicitly in the SFSB then, no problem. The Thread local session pattern is not that useful in a type-3 IoC pattern (constuctor use).

An instance variable:
The session ahs to be opened AND closed properly, this is important