Hi, guys:

We have a birdirectional one-to-many association between department and stident. We are trying to retrieve a list of students based on a given department. The following is the code we wrote to do this job. This code works, but we are wondering if this kind of coding has a downside and affect performance. Or is there a better way to do it? Really appreciate your inputs.

Session session = .......
session.update(department);
Hibernate.initialize(department);
List attr = new ArrayList(department.getStudents());
session.close();
return attr;

regards,

>> Hibernate.initialize(department);

Why do you have this line?


Anyway, I would write this code as:


Session session = .......
session.lock(department, LockMode.NONE);
Hibernate.initialize( department.getStudents() );
session.close();
return department.getStudents();


at least in Hibernate 2.1.

Really appreciate your input, Gavin:

A question: why do we need to use LockMode here if no lock required
(LockMode.NONE). Whats the benefit of it?

regards,

Sorry, forgot to ask you about :

Hibernate.initialize(department);

This line is used to force init of a persistable object. We do not need it?

lock(foo, LockMode.NONE) just means reassociate an object with the session, w/o hitting the db at all.



No, of course not. Hibernate transparently initializes associations as you navigate them!