Well this is the persistence class used to control the database connection! can you sport where the exception is coming from?
package model.service;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.persistence.EntityManager;
import javax.transaction.UserTransaction;
/**
* Utility class for dealing with persistence.
*
* @author dadsonb
*/
public class PersistenceService {
private static String DEFAULT_PU = "catalogPU";
private static ThreadLocal<PersistenceService> instance = new ThreadLocal<PersistenceService>() {
@Override
protected PersistenceService initialValue() {
return new PersistenceService();
}
};
private EntityManager em;
private UserTransaction utx;
private PersistenceService() {
try {
this.em = (EntityManager) new InitialContext().lookup("java:comp/env/persistence/" + DEFAULT_PU);
this.utx = (UserTransaction) new InitialContext().lookup("java:comp/UserTransaction");
} catch (NamingException ex) {
throw new RuntimeException(ex);
}
}
/**
* Returns an instance of PersistenceService.
*
* @return an instance of PersistenceService
*/
public static PersistenceService getInstance() {
return instance.get();
}
private static void removeInstance() {
instance.remove();
}
/**
* Returns an instance of EntityManager.
*
* @return an instance of EntityManager
*/
public EntityManager getEntityManager() {
return em;
}
/**
* Begins a resource transaction.
*/
public void beginTx() {
try {
utx.begin();
em.joinTransaction();
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
/**
* Commits a resource transaction.
*/
public void commitTx() {
try {
utx.commit();
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
/**
* Rolls back a resource transaction.
*/
public void rollbackTx() {
try {
utx.rollback();
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
/**
* Closes this instance.
*/
public void close() {
removeInstance();
}
}
[Message sent by forum member 'losintikfos' (losintikfos)]
http://forums.java.net/jive/thread.jspa?messageID=331030