The project is finished

Ok, the project is done and presented to the professor. That is good, I learned a lot while working on this application.

Transactions

Today I found a really good way to deal with transaction management in EJB 3.0 and Hibernate.
I found it on a Java Developer's Forum called "Coderanch", here: http://www.coderanch.com/t/216252/ORM/java/hibernate-Container-Managed-Transactions-CMT

It proposes the usage of container managed transactions (CMT) on the level of EJB beans together with the transactions in Hibernate session.
Like this:  When a CMT transaction in an EJB bean is running, and the Hibernate transaction is started, it joins the CMT one. 
I was worrying there might be some conflict about it, but looks like everything is fine. It is just necessary to explicitly set the transaction annotation for each bean:



import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionManagement;
import javax.ejb.TransactionManagementType;
import static javax.ejb.TransactionAttributeType.*;


@Stateless
@TransactionManagement(value=TransactionManagementType.CONTAINER)   //CMT type transaction
@TransactionAttribute(value=REQUIRED)                                                           //Required as its attribute


public class MyEJB implements MyEJBRemote {
  .... }


******************* Update: *******************
By some reason the NetBeans 6.9 doesn't resolve the input for this code correctly, so in case you copy it please make sure you copy the imports too. 

Achievements: user session

The project is almost done. Tonight I managed to transfer the user session handling from previously used Http session into session, stored into the EJB 3.0 Stateful Bean.

In general, some testing was done and the UI slightly changed for better usability.