Tapestry Hibernate database empty on page reload - database

Question

I have just recently started learning Tapestry, trying to make my own Celebrity Collector application.
Everything worked fine, until I wanted to provide a database support instead of mocked database.
I'm using Hibernate 3.6 with Tapestry 5.3.7.
I have configured my database like this:
<!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.driver_class">org.h2.Driver</property>
<property name="hibernate.connection.url">jdbc:h2:target\database</property>
<property name="hibernate.dialect">org.hibernate.dialect.H2Dialect</property>
<property name="hibernate.connection.username">sa</property>
<property name="hibernate.connection.password">sa</property>
<property name="hbm2ddl.auto">create-drop</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.format_sql">true</property>
</session-factory>
</hibernate-configuration>
My DAO interface and implementation looks like this:
package com.example.addressbook.data;
import java.util.List;
import org.apache.tapestry5.hibernate.annotations.CommitAfter;
import org.apache.tapestry5.ioc.annotations.PostInjection;
import com.example.addressbook.entities.Celebrity;
public interface CelebrityDao {
#CommitAfter
int count();
#CommitAfter
void add(Celebrity celebrity);
#CommitAfter
Celebrity get(long id);
#CommitAfter
List<Celebrity> getAll();
#CommitAfter
List<Celebrity> getRange(long startIndex, long endIndex);
#PostInjection
void prepare();
}
package com.example.addressbook.data.impl;
import java.util.ArrayList;
import java.util.List;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;
import com.example.addressbook.data.CelebrityDao;
import com.example.addressbook.entities.Celebrity;
public class CelebrityDaoImpl implements CelebrityDao {
#Inject
protected Session session;
public void add(Celebrity celebrity) {
session.persist(celebrity);
}
public Celebrity get(long id) {
Criteria criteria = session.createCriteria(Celebrity.class);
criteria.add(Restrictions.eq("id", id));
Celebrity celebrity = (Celebrity) criteria.uniqueResult();
return celebrity;
}
public List<Celebrity> getAll() {
Criteria criteria = session.createCriteria(Celebrity.class);
List rawResults = criteria.list();
List<Celebrity> results = new ArrayList<Celebrity>();
for (Object object : rawResults) {
results.add((Celebrity) object);
}
return results;
}
public List<Celebrity> getRange(long startIndex, long endIndex) {
Criteria criteria = session.createCriteria(Celebrity.class);
criteria.add(Restrictions.between("id", startIndex, endIndex));
List rawResults = criteria.list();
List<Celebrity> results = new ArrayList<Celebrity>();
for (Object object : rawResults) {
results.add((Celebrity) object);
}
return results;
}
public void prepare() {
// adding some initial records in the database
}
public int count() {
return getAll().size();
}
}
My ShowAll class is here:
package com.example.addressbook.pages;
import java.text.Format;
import java.util.List;
import org.apache.tapestry5.SelectModel;
import org.apache.tapestry5.ValueEncoder;
import org.apache.tapestry5.annotations.InjectPage;
import org.apache.tapestry5.annotations.OnEvent;
import org.apache.tapestry5.annotations.Persist;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.annotations.SessionState;
import org.apache.tapestry5.beaneditor.BeanModel;
import org.apache.tapestry5.grid.GridDataSource;
import org.apache.tapestry5.ioc.Messages;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.services.BeanModelSource;
import com.example.addressbook.data.CelebrityDao;
import com.example.addressbook.entities.Celebrity;
import com.example.addressbook.model.User;
import com.example.addressbook.util.CelebrityEncoder;
import com.example.addressbook.util.CelebritySelectModel;
import com.example.addressbook.util.Formats;
import com.example.addressbook.util.HibernateEntityDataSource;
public class ShowAll {
#SessionState
private User user;
private boolean userExists;
#Inject
private CelebrityDao dao;
#InjectPage
private Details detailsPage;
#Property
private Celebrity celebrity;
#Inject
private BeanModelSource beanModelSource;
#Inject
private Messages messages;
String onActivate() {
if (!userExists)
return "Index";
return null;
}
#OnEvent(component = "detailsLink")
Object onShowDetails(long id) {
Celebrity celebrity = dao.get(id);
detailsPage.setCelebrity(celebrity);
System.err.println("Requested ID: " + id);
System.err.println("Result: " + celebrity.getLastName());
return detailsPage;
}
public BeanModel<Celebrity> getModel() {
return beanModelSource.createDisplayModel(Celebrity.class, messages);
}
public List<Celebrity> getAllCelebrities() {
return this.dao.getAll();
}
public Format getDateFormat() {
return Formats.getDateFormat();
}
public User getUser() {
return user;
}
public GridDataSource getCelebritySource() {
return new HibernateEntityDataSource<Celebrity>(Celebrity.class, dao);
}
public SelectModel getCelebrityModel() {
return new CelebritySelectModel(getAllCelebrities());
}
public ValueEncoder<Celebrity> getCelebrityEncoder() {
return new CelebrityEncoder(dao);
}
#Persist
private Celebrity selectedCelebrity;
public Celebrity getSelectedCelebrity() {
return selectedCelebrity;
}
public void setSelectedCelebrity(Celebrity selectedCelebrity) {
this.selectedCelebrity = selectedCelebrity;
}
public String getSelectedCelebrityName() {
if (selectedCelebrity == null) {
return "";
}
return selectedCelebrity.getFirstName() + " " + selectedCelebrity.getLastName();
}
}
And here is how I add new ones:
package com.example.addressbook.pages;
import org.apache.tapestry5.ioc.annotations.Inject;
import com.example.addressbook.data.CelebrityDao;
import com.example.addressbook.entities.Celebrity;
public class AddCelebrity {
private Celebrity celebrity;
#Inject
private CelebrityDao dao;
public void onActivate() {
System.out.println("OnActivate: " + dao.getAll().toString());
if (celebrity == null) {
celebrity = new Celebrity();
}
}
public Celebrity getCelebrity() {
return celebrity;
}
public void setCelebrity(Celebrity celebrity) {
this.celebrity = celebrity;
}
Object onSuccess() {
dao.add(celebrity);
System.out.println("All celebrities: " + dao.getAll().toString());
return ShowAll.class;
}
}
The problem is the following:
When I first come to ShowAll page, my records are pulled from the database and rendered.
When I refresh the page, the records are removed magically and nothing is displayed. The database is empty (dao.getAll() returns and empty list)
When I add a new Celebrity via AddCelebrity page, it is inserted into the database, but as the page is refreshed, the magic happens again and the database is empty again.
I have binded my DAO interface and implementation in AppModule class:
public static void bind(ServiceBinder binder) {
binder.bind(SupportedLocales.class, SupportedLocalesImpl.class);
binder.bind(CelebrityDao.class, CelebrityDaoImpl.class);
}
HELP!! :)

Answer 1

The answer was to add another method to AppModule class
#Match("*Dao")
public static void adviseTransactions(HibernateTransactionAdvisor advisor,
MethodAdviceReceiver receiver) {
advisor.addTransactionCommitAdvice(receiver);
}
So that Tapestry could actually do something with #CommitAfter annotation on my DAO methods.