I'm building my first Struts/Tiles/Hibernate application and ran into some problems.
I have a Businessclass that has a method for a List, I call on that method straight in my jsp. This same approach did work on another tutorial I was working on, but in my project now it isn't.
/**
* Basic Hibernate helper class, handles SessionFactory, Session and Transaction.
* <p>
* Uses a static initializer for the initial SessionFactory creation
* and holds Session and Transactions in thread local variables. All
* exceptions are wrapped in an unchecked InfrastructureException.
*
* @author
[email protected] */
public class HibernateUtil {
private static Log log = LogFactory.getLog(SessionFactory.class);
private static Configuration configuration;
private static SessionFactory sessionFactory;
private static final ThreadLocal threadSession = new ThreadLocal();
private static final ThreadLocal threadTransaction = new ThreadLocal();
private static final ThreadLocal threadInterceptor = new ThreadLocal();
// Create the initial SessionFactory from the default configuration files
static {
try {
//configuration = new Configuration();
sessionFactory = new Configuration().configure().buildSessionFactory();
// We could also let Hibernate bind it to JNDI:
// configuration.configure().buildSessionFactory()
} catch (Throwable ex) {
// We have to catch Throwable, otherwise we will miss
// NoClassDefFoundError and other subclasses of Error
log.error("Building SessionFactory failed.", ex);
throw new ExceptionInInitializerError(ex);
}
}
/**
* Returns the SessionFactory used for this static class.
*
* @return SessionFactory
*/
public static SessionFactory getSessionFactory() {
/* Instead of a static variable, use JNDI:
SessionFactory sessions = null;
try {
Context ctx = new InitialContext();
String jndiName = "java:hibernate/HibernateFactory";
sessions = (SessionFactory)ctx.lookup(jndiName);
} catch (NamingException ex) {
throw new InfrastructureException(ex);
}
return sessions;
*/
return sessionFactory;
}
/**
* Returns the original Hibernate configuration.
*
* @return Configuration
*/
public static Configuration getConfiguration() {
return configuration;
}
/**
* Rebuild the SessionFactory with the static Configuration.
*
*/
public static void rebuildSessionFactory()
throws InfrastructureException {
synchronized(sessionFactory) {
try {
sessionFactory = getConfiguration().buildSessionFactory();
} catch (Exception ex) {
throw new InfrastructureException(ex);
}
}
}
/**
* Rebuild the SessionFactory with the given Hibernate Configuration.
*
* @param cfg
*/
public static void rebuildSessionFactory(Configuration cfg)
throws InfrastructureException {
synchronized(sessionFactory) {
try {
sessionFactory = cfg.buildSessionFactory();
configuration = cfg;
} catch (Exception ex) {
throw new InfrastructureException(ex);
}
}
}
/**
* Retrieves the current Session local to the thread.
* <p/>
* If no Session is open, opens a new Session for the running thread.
*
* @return Session
*/
public static Session getSession()
throws InfrastructureException {
Session s = (Session) threadSession.get();
try {
if (s == null || s.isOpen() == false) {
log.debug("Opening new Session for this thread.");
if (getInterceptor() != null) {
log.debug("Using interceptor: " + getInterceptor().getClass());
s = getSessionFactory().openSession(getInterceptor());
} else {
s = getSessionFactory().openSession();
}
threadSession.set(s);
}
} catch (HibernateException ex) {
throw new InfrastructureException(ex);
}
return s;
}
/**
* Closes the Session local to the thread.
*/
public static void closeSession()
throws InfrastructureException {
try {
Session s = (Session) threadSession.get();
threadSession.set(null);
if (s != null && s.isOpen()) {
log.debug("Closing Session of this thread.");
s.close();
}
} catch (HibernateException ex) {
throw new InfrastructureException(ex);
}
}
/**
* Start a new database transaction.
*/
public static void beginTransaction()
throws InfrastructureException {
Transaction tx = (Transaction) threadTransaction.get();
try {
if (tx == null) {
log.debug("Starting new database transaction in this thread.");
tx = getSession().beginTransaction();
threadTransaction.set(tx);
}
} catch (HibernateException ex) {
throw new InfrastructureException(ex);
}
}
/**
* Commit the database transaction.
*/
public static void commitTransaction()
throws InfrastructureException {
Transaction tx = (Transaction) threadTransaction.get();
try {
if ( tx != null && !tx.wasCommitted()
&& !tx.wasRolledBack() ) {
log.debug("Committing database transaction of this thread.");
tx.commit();
}
threadTransaction.set(null);
} catch (HibernateException ex) {
rollbackTransaction();
throw new InfrastructureException(ex);
}
}
/**
* Commit the database transaction.
*/
public static void rollbackTransaction()
throws InfrastructureException {
Transaction tx = (Transaction) threadTransaction.get();
try {
threadTransaction.set(null);
if ( tx != null && !tx.wasCommitted() && !tx.wasRolledBack() ) {
log.debug("Tyring to rollback database transaction of this thread.");
tx.rollback();
}
} catch (HibernateException ex) {
throw new InfrastructureException(ex);
} finally {
closeSession();
}
}
/**
* Reconnects a Hibernate Session to the current Thread.
*
* @param session The Hibernate Session to be reconnected.
*/
public static void reconnect(Session session)
throws InfrastructureException {
try {
session.reconnect();
threadSession.set(session);
} catch (HibernateException ex) {
throw new InfrastructureException(ex);
}
}
/**
* Disconnect and return Session from current Thread.
*
* @return Session the disconnected Session
*/
public static Session disconnectSession()
throws InfrastructureException {
Session session = getSession();
try {
threadSession.set(null);
if (session.isConnected() && session.isOpen())
session.disconnect();
} catch (HibernateException ex) {
throw new InfrastructureException(ex);
}
return session;
}
/**
* Register a Hibernate interceptor with the current thread.
* <p>
* Every Session opened is opened with this interceptor after
* registration. Has no effect if the current Session of the
* thread is already open, effective on next close()/getSession().
*/
public static void registerInterceptor(Interceptor interceptor) {
threadInterceptor.set(interceptor);
}
private static Interceptor getInterceptor() {
Interceptor interceptor =
(Interceptor) threadInterceptor.get();
return interceptor;
}
}
I've googled around, found things about classpaths, libraries and such but as far as I can see all is well.
In my java files I'm referering to the right classes (otherwise Eclipse would warn me about it), so I'm frustrated out of idea's!
Another thing. The first rootcause with line 39 is from the throw/catch at wanting to build a SessionFactory and the second one at CustomerDAO:195 is at the List method at trying to get the HibernateUtil.getSession
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