Hello RamnathN
Thanks for answering. Following I send you some Java sources. I think the problem is the caching of hibernate. If I debug at the point of loading the data the hibernate function list supplies the wrong values.
I use Lazy loading and it is working well. I hold the session in a thread local variable and my hope was that every request shares that variable. But there must be some conflict with different
requests. Users logged from other browsers doesn't see stored objects of other users. The caches are not refreshed.
I hope you can give me a solution. The other way is to disable lazy loading
and to load and save the data with explicit session.open and session.close.
1. My HibernateUtil class
package com.server.hibernate.util;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.apache.log4j.Logger;
import org.hibernate.CacheMode;
import org.hibernate.EntityMode;
import org.hibernate.FlushMode;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import com.common.exceptions.LomisDataAccessException;
import com.common.exceptions.LomisExceptionKeys;
import com.common.exceptions.LomisInitializeException;
public class HibernateUtil {
private static Configuration configuration=null;
private static Logger log = Logger.getLogger(HibernateUtil.class);
private static final SessionFactory sessionFactory;
private static final ThreadLocal threadSession = new ThreadLocal();
private static final ThreadLocal threadTransaction = new ThreadLocal();
static {
try {
// Create the SessionFactory
//sessionFactory = new Configuration().configure().buildSessionFactory();
configuration = new Configuration();
if (configuration.getProperty(Environment.SESSION_FACTORY_NAME) != null) {
// Let Hibernate bind the factory to JNDI
configuration.buildSessionFactory();
String sfName = configuration.getProperty(Environment.SESSION_FACTORY_NAME);
log.debug("Looking up SessionFactory in JNDI.");
try {
sessionFactory = (SessionFactory) new InitialContext().lookup(sfName);
} catch (NamingException ex) {
throw new RuntimeException(ex);
}
} else {
// or use static variable handling
sessionFactory = configuration.configure().buildSessionFactory();
}
} catch (Throwable ex) {
// Make sure you log the exception, as it might be swallowed
log.error("Initial SessionFactory creation failed.", ex);
throw new LomisInitializeException(ex);
}
}
public static Session getSession() throws LomisDataAccessException{
Session s = (Session) threadSession.get();
// Open a new Session, if this thread has none yet
try {
if (s == null) {
s = sessionFactory.openSession();
s.setCacheMode(CacheMode.IGNORE);
s.setFlushMode(FlushMode.ALWAYS);
threadSession.set(s);
}
} catch (HibernateException ex) {
throw new LomisDataAccessException(
LomisExceptionKeys.errorGetSession,
ex,
HibernateUtil.class);
}
return s;
}
public static void closeSession() throws LomisDataAccessException{
try {
Session s = (Session) threadSession.get();
threadSession.set(null);
if (s != null && s.isOpen())
s.close();
} catch (HibernateException ex) {
throw new LomisDataAccessException(
LomisExceptionKeys.errorCloseSession,
ex,HibernateUtil.class);
}
}
public static void beginTransaction() throws LomisDataAccessException {
Transaction tx = (Transaction) threadTransaction.get();
try {
if (tx == null) {
tx = getSession().beginTransaction();
threadTransaction.set(tx);
}
} catch (HibernateException ex) {
throw new LomisDataAccessException(
LomisExceptionKeys.errorBeginTransaction,
ex,
HibernateUtil.class);
}
}
public static void commitTransaction()throws LomisDataAccessException {
Transaction tx = (Transaction) threadTransaction.get();
try {
if (tx != null && !tx.wasCommitted() && !tx.wasRolledBack())
tx.commit();
threadTransaction.set(null);
} catch (HibernateException ex) {
rollbackTransaction();
throw new LomisDataAccessException(
LomisExceptionKeys.errorCommitTransaction,
ex,
HibernateUtil.class);
}
}
public static void rollbackTransaction() throws LomisDataAccessException{
Transaction tx = (Transaction) threadTransaction.get();
try {
threadTransaction.set(null);
if (tx != null && !tx.wasCommitted() && !tx.wasRolledBack()) {
tx.rollback();
}
} catch (HibernateException ex) {
throw new LomisDataAccessException(
LomisExceptionKeys.errorRollbackTransaction,
ex,
HibernateUtil.class);
} finally {
closeSession();
}
}
}
2. A save-function of a business action class
/**
* Saves the values of the form edit data fields
* @param pctxAction
*/
public synchronized void save_onClick(FormActionContext ctx){
try {
ViewHelper vh=this.getViewHelper(ctx);
if (vh!=null && vh.validate(ctx)){
GenericDAO dao=this.getDao();
DataObject entity=vh.getDO();
log.info("Dataobject will be saved: "+entity.toString());
if (entity!=null){
dao.saveOrupdate(entity);
// dao.update(entity);
}
//log.info("Dataobject saved: "+entity.toString());
this.getForm(ctx).clearEditArea();
this.initFormBean(ctx);
} else {
ctx.forwardToInput();
}
} catch (Exception e) {
ClientExceptionHandler.addGlobalError(ctx,"error.save",
e,BaseListAction.class);
}
}
3. My load-function
protected void loadFormBean(ActionContext ctx) {
BaseListForm form;
Vector<DataObject> vctDataobject= null;
ArrayList alsViewhelpers;
FilterContainer filterContainer;
LomisListDataModel model;
Vector<ViewHelper> vctViewhelpers = new Vector<ViewHelper>(0);
form = this.getForm(ctx);
if (form != null) {
try {
filterContainer=this.getFilterContainer(this.getSessionUser(ctx));
//filterContainer.add(this.getDeaktivFilterValue());
vctDataobject=getDao().findFiltered(filterContainer);
for (DataObject e: vctDataobject){
ViewHelper vh=getBusinessViewHelper(ctx,e);
//log.info(vh.getClass()+" geladen: Inhalt: "+vh.getDO().toString());
//System.out.println(vh.getClass()+" geladen: Inhalt: "+vh.getDO().toString());
vctViewhelpers.add(vh);
}
} catch (Exception e) {
e.printStackTrace();
ClientExceptionHandler.addGlobalError(ctx,"error.load",
e,BaseListAction.class);
}
model = new LomisListDataModel(vctViewhelpers);
LomisSimpleListControl slc = new LomisSimpleListControl();
slc.setDataModel(model);
form.setSlclist(slc);
}
System.out.println("Load form beendet");
}
4. My hibernate.cfg.xml-file
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.datasource">java:comp/env/jdbc/lomis</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
<!-- Print SQL to stdout. -->
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<!-- Bind the getCurrentSession() method to the thread (don't use for EJBs) -->
<property name="current_session_context_class">thread</property>
<!-- Use EHCache but not the query cache. -->
<property name="hibernate.cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<property name="hibernate.cache.use_query_cache">false</property>
<property name="hibernate.cache.use_minimal_puts">false</property>
<property name="hibernate.cache.use_second_level_cache">false</property>
<property name="hibernate.max_fetch_depth">3</property>
//mapping ....
</session-factory>
</hibernate-configuration>
Thanks in advance
Thomas
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