Hibernate binding problem
hi folk.
i'm considering some examples of jboss, "jbossatwork" http://www.jbossatwork.com/downloads.html. i somehow understand first 4, but i'm now stuck in 5th.
as i get, the problem is in binding hibernate. see, in 4th example (ch04) it binds through JDBC (JDBCCarDAO), and in 5th (ch05/05a-list) it tries to do through hibernate (HibernateCarDAO). when i try to run it through hibernate, in jboss a message like "hibernte not bound" appears. pls, could anybody help me to find the problem of hibernate?
lema
Message was edited by:
lema
[578 byte] By [
lemaa] at [2007-11-27 11:29:42]
# 1
this is a part from ControllerServlet.java:
if(VIEW_CAR_LIST_ACTION.equals(actionName))
{
CarDAO carDAO = new HibernateCarDAO();
request.setAttribute("carList", carDAO.findAll());
destinationPage = "/carList.jsp";
this is HibernateCarDAO.java
package com.jbossatwork.dao;
import java.util.*;
import org.hibernate.*;
import com.jbossatwork.dto.CarDTO;
import com.jbossatwork.util.*;
public class HibernateCarDAO implements CarDAO
{
private List carList;
private static final String HIBERNATE_SESSION_FACTORY="java:comp/env/hibernate/SessionFactory";
public HibernateCarDAO()
{}
public List findAll()
{
List carList = new ArrayList();
Session session = null;
try
{
session = ServiceLocator.getHibernateSession(HIBERNATE_SESSION_FACTORY);
Criteria criteria = session.createCriteria(CarDTO.class);
carList = criteria.list();
}
catch (Exception e)
{
System.out.println(e);
}
finally
{
try
{
if (session != null) {session.close();}
}
catch (Exception e)
{
System.out.println(e);
}
}
return carList;
}
}
this is JDBCCarDAO.java:
package com.jbossatwork.dao;
import java.util.*;
import java.sql.*;
import javax.sql.*;
import com.jbossatwork.dto.CarDTO;
import com.jbossatwork.util.*;
public class JDBCCarDAO implements CarDAO
{
private List carList;
private static final String DATA_SOURCE="java:comp/env/jdbc/JBossAtWorkDS";
public JDBCCarDAO()
{}
public List findAll()
{
List carList = new ArrayList();
DataSource dataSource = null;
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try
{
dataSource = ServiceLocator.getDataSource(DATA_SOURCE);
conn = dataSource.getConnection();
stmt = conn.createStatement();
rs = stmt.executeQuery("select * from CAR");
while(rs.next())
{
CarDTO car = new CarDTO();
car.setId(rs.getInt("ID"));
car.setMake(rs.getString("MAKE"));
car.setModel(rs.getString("MODEL"));
car.setModelYear(rs.getString("MODEL_YEAR"));
carList.add(car);
}
}
catch (Exception e)
{
System.out.println(e);
}
finally
{
try
{
if(rs != null){rs.close();}
if(stmt != null){stmt.close();}
if(conn != null){conn.close();}
}
catch(Exception e)
{
System.out.println(e);
}
}
return carList;
}
}
lemaa at 2007-7-29 16:29:31 >
# 2
when i change the part from ControllerServlet.java into:
if(VIEW_CAR_LIST_ACTION.equals(actionName))
{
CarDAO carDAO = new JDBCCarDAO();
request.setAttribute("carList", carDAO.findAll());
destinationPage = "/carList.jsp";
it works well, but if i leave it unchanged jboss gives a message like:
INFO [STDOUT] com.jbossatwork.util.ServiceLocatorException: com.jbossatwork.util.ServiceLocatorException: javax.naming.NamingException: Could not dereference object [Root exception is javax.naming.NameNotFoundException: hibernate not bound]
Message was edited by:
lema
lemaa at 2007-7-29 16:29:31 >
# 3
can it be because of hbm.xml file? Because, i was expecting to obtain car.hbm.xml but it gave me CarDAO.hbm.xml.
just i am following what the book says of jbossatwork examples.
here it is, CarDAO.hbm.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping
>
<class
name="com.jbossatwork.dto.CarDTO"
table="CAR"
>
<id
name="id"
column="ID"
type="int"
>
<generator class="native">
<!--
To add non XDoclet generator parameters, create a file named
hibernate-generator-params-CarDTO.xml
containing the additional parameters and place it in your merge dir.
-->
</generator>
</id>
<property
name="make"
type="java.lang.String"
update="true"
insert="true"
column="MAKE"
/>
<property
name="model"
type="java.lang.String"
update="true"
insert="true"
column="MODEL"
/>
<property
name="modelYear"
type="java.lang.String"
update="true"
insert="true"
column="MODEL_YEAR"
/>
<!--
To add non XDoclet property mappings, create a file named
hibernate-properties-CarDTO.xml
containing the additional properties and place it in your merge dir.
-->
</class>
</hibernate-mapping>
lemaa at 2007-7-29 16:29:31 >
# 4
hallloooo? isn't there any to help me pls
lemaa at 2007-7-29 16:29:31 >
# 5
You haven't configured the session factory as a JNDI resource. Either you've omitted it completely, or you've incorrectly configured it.
# 6
pls say, where and how is it configured?
***********************************in ServiceLocator.java?
package com.jbossatwork.util;
import javax.naming.*;
import javax.sql.*;
import org.hibernate.SessionFactory;
import org.hibernate.Session;
/**
* <code>ServiceLocator</code> encapsulates JNDI lookups to make it
* easier to access JNDI-based resources (EJBs, DataSources,
* JMS Destinations, and so on).
*
*/
public class ServiceLocator {
/**
* Making the default (no arg) constructor private
* ensures that this class cannnot be instantiated.
*/
private ServiceLocator() {}
/**
* Gets a <code>DataSource</code> using the given JNDI name.
*
* @param dataSourceJndiName The <code>DataSource</code>'s JNDI name.
*
* @return DataSource The <code>DataSource</code>.
*
* @throws ServiceLocatorException If there are JNDI lookup problems.
*
* @see javax.sql.DataSource
*/
public static DataSource getDataSource(String dataSourceJndiName) throws ServiceLocatorException {
DataSource dataSource = null;
try {
Context ctx = new InitialContext();
dataSource = (DataSource) ctx.lookup(dataSourceJndiName);
} catch (ClassCastException cce) {
throw new ServiceLocatorException(cce);
} catch (NamingException ne) {
throw new ServiceLocatorException(ne);
}
return dataSource;
}
public static SessionFactory getHibernateSessionFactory(String jndiSessionFactoryName) throws ServiceLocatorException {
SessionFactory sessionFactory = null;
try {
Context ctx = new InitialContext();
sessionFactory = (SessionFactory) ctx.lookup(jndiSessionFactoryName);
} catch (ClassCastException cce) {
throw new ServiceLocatorException(cce);
} catch (NamingException ne) {
throw new ServiceLocatorException(ne);
}
return sessionFactory;
}
public static Session getHibernateSession(String jndiSessionFactoryName) throws ServiceLocatorException {
Session session = null;
try
{
session = getHibernateSessionFactory(jndiSessionFactoryName).openSession();
}
catch (Exception e)
{
throw new ServiceLocatorException(e);
}
return session;
}
}
*********************************** or in hibernate-service.xml?
<server>
<mbean code="org.jboss.hibernate.jmx.Hibernate"
name="jboss.har:service=Hibernate">
<attribute name="DatasourceName">java:/JBossAtWorkDS</attribute>
<attribute name="Dialect">org.hibernate.dialect.HSQLDialect</attribute>
<attribute name="SessionFactoryName">hibernate/SessionFactory</attribute>
<attribute name="CacheProviderClass">org.hibernate.cache.HashtableCacheProvider</attribute>
</mbean>
</server>
lemaa at 2007-7-29 16:29:31 >
# 7
i guess it is done in jboss-web.xml, right?
<resource-ref>
<res-ref-name>jdbc/JBossAtWorkDS</res-ref-name>
<jndi-name>java:/JBossAtWorkDS</jndi-name>
</resource-ref>
<resource-ref>
<res-ref-name>hibernate/SessionFactory</res-ref-name>
<jndi-name>java:/hibernate/SessionFactory</jndi-name>
</resource-ref>
lemaa at 2007-7-29 16:29:31 >
# 8
It'll be JBoss specific and I don't use it, so I can't tell you.
The name needs to be visible to applications within the container (like your one) with the fully qualified path "java:comp/env/hibernate/SessionFactory" as used in your DAO implementation.
# 9
what a pity.
and the jboss-web.xml is not changed anyhow, it is set in gensrc folder while ant'***.
lemaa at 2007-7-29 16:29:31 >
# 10
Amusingly, you seem to have fallen foul of the naughty word filter :-)
# 11
noo, i wanted to say "anting" but through the sign ' . i don't use naughty words eve in my mother tongue
lemaa at 2007-7-29 16:29:31 >
# 12
anyway, i am some sure that the problem lays in reply3.
but the hbm.xml file is set by default too while anting. i am now looking for a file which sets the name CarDAO.hbm.xml instead of car.hbm.xml
lemaa at 2007-7-29 16:29:31 >
# 13
ohh changing the name didn't help. so maybe the reply3 has nothing in this problem
lemaa at 2007-7-29 16:29:31 >
# 14
No, it's nothing to do with the mapping files. The exception you're getting is quite clear:
"javax.naming.NamingException: Could not dereference object [Root exception is javax.naming.NameNotFoundException: hibernate not bound]"
That means exactly what it says - there's no JNDI resource with the name you're asking for anywhere in the JNDI container.
# 15
is it meant, that i do not have a needed library on jboss?
or maybe there is a wrong package somewhere in configuration?
i'm some confused about the packages/paths, it is net.sf.hibernate.. but in some files it is org.hibernate..
--hibernate-service.xml
<server>
<mbean code="org.jboss.hibernate.jmx.Hibernate"
name="jboss.har:service=Hibernate">
<attribute name="DatasourceName">java:/JBossAtWorkDS</attribute>
<attribute name="Dialect">org.hibernate.dialect.HSQLDialect</attribute>
<attribute name="SessionFactoryName">java:/hibernate/SessionFactory</attribute>
<attribute name="CacheProviderClass">org.hibernate.cache.HashtableCacheProvider</attribute>
</mbean>
</server>
web.xml
...
<resource-ref >
<res-ref-name>hibernate/SessionFactory</res-ref-name>
<res-type>net.sf.hibernate.SessionFactory</res-type>
<res-auth>Container</res-auth>
</resource-ref>
...
-jboss-web.xml
...
<resource-ref>
<res-ref-name>hibernate/SessionFactory</res-ref-name>
<jndi-name>java:/hibernate/SessionFactory</jndi-name>
</resource-ref>
...
lemaa at 2007-7-29 16:29:35 >
# 16
-HibernateCarDAO.java
...
public class HibernateCarDAO implements CarDAO
{
private List carList;
private static final String HIBERNATE_SESSION_FACTORY="java:comp/env/hibernate/SessionFactory";
public HibernateCarDAO()
{}
...
lemaa at 2007-7-29 16:29:35 >
# 17
> net.sf.hibernate.SessionFactory
This definitely ought to be org.hibernate.SessionFactory. The "net.sf" packages are from Hibernate 2 whereas you appear to be using Hibernate 3
# 18
oh ya. my examples are written with the hibernate version2(because in the book the explanation of codes use net.sf.hibernate). but i got the hibernate3.jar from EJB3 folder.
so could you pls give a link where i can get the hibernate2.jar etc., if you know any?
lemaa at 2007-7-29 16:29:35 >
# 19
> oh ya. my examples are written with the hibernate
> version2(because in the book the explanation of
> codes use net.sf.hibernate). but i got the hibernate3.jar
> from EJB3 folder.
Didn't anything strike you as... wrong... about that?
The package name should give you a clue as to where to find them. You might find it easier to get a more up-to-date book and build it with H3 instead of H2 though.
