Hibernate version: last
Eclipse: last
jboss: last
Hello
I'm using hibernate with a filter (path /*) that map all the requests.
Now my application is slow because in some jsp I'll use the same selectBox and these are created form DB data with hibernate access.
In my case these selectBox are always the same during the application life, so I'm trying to do a Listener that at the start of my webapp retrives and store these selectBox (an ArrayList) in the ServletContext. In this way I can retrive the box faster.
These are my sources
--- PersistenceFilter ---
Code:
public class PersistenceFilter implements Filter {
/**
* Holds the current hibernate session, if one has been created.
*/
protected static ThreadLocal hibernateHolder = new ThreadLocal( );
protected static SessionFactory factory;
//protected static Transaction transaction;
public void init(FilterConfig filterConfig) throws ServletException {
// Initialize hibernate
try {
doInit( );
}
catch (HibernateException ex) {
throw new ServletException(ex);
}
}
/**
* This method should only be called when this class is used directly -
* that is, when using this class outside of the servlet container.
* @throws HibernateException
*/
public static void doInit( ) throws HibernateException {
factory = new Configuration( ).configure("JNCV.cfg.xml").buildSessionFactory( );
}
public void doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain)
throws IOException, ServletException {
if (hibernateHolder.get( ) != null)
throw new IllegalStateException(
"A session is already associated with this thread! "
+ "Someone must have called getSession( ) outside of the context "
+ "of a servlet request.");
getSession();
try {
chain.doFilter(request, response);
}
finally {
/*Session sess = (Session)hibernateHolder.get( );
//transaction.commit();
if (sess != null) {
hibernateHolder.set(null);
//transaction=null;
try {
sess.close( );
}
catch (HibernateException ex) {
throw new ServletException(ex);
}
}*/
HibernateConfigHolder hch = (HibernateConfigHolder)hibernateHolder.get( );
if(hch!=null){
hibernateHolder.set(null);
try {
hch.getTransaction().commit();
hch.getSession().close();
hch.setSession(null);
hch.setTransaction(null);
}
catch (HibernateException ex) {
throw new ServletException(ex);
}
}
}
}
/**
* ONLY ever call this method from within the context of a servlet request
* (specifically, one that has been associated with this filter). If you
* want a Hibernate session at some other time, call getSessionFactory( )
* and open/close the session yourself.
*
* @return an appropriate Session object
*/
public static Session getSession( ) throws HibernateException {
/*Session sess = (Session)hibernateHolder.get( );
if (sess == null) {
sess = factory.openSession( );
hibernateHolder.set(sess);
}*/
//-----------------------
HibernateConfigHolder hch = (HibernateConfigHolder)hibernateHolder.get();
if (hch == null) {
hch = new HibernateConfigHolder();
Session sess = factory.openSession();
Transaction tran = sess.beginTransaction();
hch.setSession(sess);
hch.setTransaction(tran);
hibernateHolder.set(hch);
}
//transaction = sess.beginTransaction();
return hch.getSession();
}
/**
* @return the hibernate session factory
*/
public static SessionFactory getSessionFactory( ) {
return factory;
}
public static void checkPoint() {
HibernateConfigHolder hch = (HibernateConfigHolder)hibernateHolder.get();
if (hch != null) {
hch.getTransaction().commit();
}
}
/**
* This is a simple method to reduce the amount of code that needs
* to be written every time hibernate is used.
*/
public static void rollback(Transaction tx) {
if (tx != null) {
try {
tx.rollback( );
}
catch (HibernateException ex) {
// Probably don't need to do anything - this is likely being
// called because of another exception, and we don't want to
// mask it with yet another exception.
}
}
}
public void destroy( ) {
// Nothing necessary
}
public static ThreadLocal getHibernateHolder() {
return hibernateHolder;
}
}
--- OQLHelper ---
Code:
public class OQLHelper {
public static Query createQuery(String query) {
return PersistenceFilter.getSession().createQuery(query);
}
//TODO: da finire recuperare da quella già fatta
public static void store(Object obj){
HibernateConfigHolder hch = (HibernateConfigHolder) PersistenceFilter.getHibernateHolder().get( );
hch.getSession().save(obj);
}
public static void update(Object obj){
HibernateConfigHolder hch = (HibernateConfigHolder)PersistenceFilter.getHibernateHolder().get( );
hch.getSession().update(obj);
}
public static void remove(Object obj){
HibernateConfigHolder hch = (HibernateConfigHolder)PersistenceFilter.getHibernateHolder().get( );
hch.getSession().delete(obj);
hch.getSession().flush();
}
}
--- HibernateConfigHolder ---
Code:
public class HibernateConfigHolder {
private Session session;
private Transaction transaction;
public void setSession(Session session) {
this.session = session;
}
public Session getSession() {
return session;
}
public void setTransaction(Transaction transaction) {
this.transaction = transaction;
}
public Transaction getTransaction() {
return transaction;
}
}
I try to write a listener that have this contextInitialized method that store the arraylist in the context
Code:
public void contextInitialized(ServletContextEvent event) {
this.context = event.getServletContext();
//Output a simple message to the server's console
System.out.println("=========== The JOBNET Web App. Is Ready ===========");
ArrayList<LabelValueBean> comuni = new ArrayList<LabelValueBean>();
Query queryComuni = OQLHelper.createQuery("from " + ComuniFisc.class.getName());
List<ComuniFisc> comuniFisc = queryComuni.list();
for(ComuniFisc comune: comuniFisc) {
ComuniFiscId cId = (ComuniFiscId) comune.getId();
comuni.add(new LabelValueBean(cId.getComune()+ " (" + cId.getProv() +")", cId.getCodComune() ));
//System.out.println("codComune: " + cId.getCodComune() +
// "comune" + cId.getComune() + " provincia: " + cId.getProv());
}
event.getServletContext().setAttribute(ProjectConstants.SELECTBOX_COMUNI, comuni);
}
but when I try to start the webapp I recive this error
Code:
10:30:20,849 INFO [STDOUT] =========== The JOBNET Web App. Is Ready ===========
10:30:20,865 ERROR [[/jbn]] Exception sending context initialized event to listener instance of class com.sintesinet.jobnet.cv.listener.SelectBoxListener
java.lang.NullPointerException
at com.sintesinet.common.persistence.PersistenceFilter.getSession(PersistenceFilter.java:117)
at com.sintesinet.common.persistence.OQLHelper.createQuery(OQLHelper.java:9)
I think that's because all the hib. mappings have not started yet. or ??
only after this the console shows
Code:
10:30:23,569 INFO [Configuration] configuring from resource: /hibernate.cfg.xml
10:30:23,569 INFO [Configuration] Configuration resource: /hibernate.cfg.xml
10:30:23,694 INFO [Configuration] Mapping resource: common.hbm.xml
10:30:23,819 INFO [HbmBinder] Mapping class: com.sintesinet.common.ontology.GeneralUser -> GENERALUSER
10:30:24,038 INFO [HbmBinder] Mapping class: com.sintesinet.common.ontology.AnagraficalData -> ANAGRAFICALDA
etc.
Someone knows what must I change to do that?
thanks a lot guys
bye ;)
Login
FAQ
Search
