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Boo
 Post subject: Failed to lookup Hibernate SessionFactory in WebLogic
PostPosted: Wed Feb 16, 2005 7:07 am 
Newbie

Joined: Mon Nov 22, 2004 2:11 pm
Posts: 6
Hi,

I have read the post http://forum.hibernate.org/viewtopic.php?t=932394 which describes an interesting approach to reuse Hibernate Sesson instances withing an ejb server without the need of explicit session.flush() calls.
Unfortunately I can't successfully use the provided implementation of HibernateUtil inside WebLogic 8.1 (and Hibernate 2.1.6) since I receive a NameNotFoundException for java:/HibernateFactory inside the following method:
Code:
public static SessionFactory lookupSessionFactory() throws NamingException {
    InitialContext initCtx = new InitialContext();
    return (SessionFactory) initCtx.lookup("java:/HibernateFactory");
}

I am fairly sure that I miss some configuration that is needed to insert the Hibernate SessionFactory into the WebLogic JNDI context. Is this true? How can I do that?

Any help would really be appreciated
Thanks for your time.

Michael


My current hibernate.cfg.xml is as follows:
Code:
<hibernate-configuration>
  <session-factory name="java:/HibernateFactory">
    <property name="connection.datasource">jdbc/HibernateSampleDS</property>
    <property name="transaction.factory_class">net.sf.hibernate.transaction.JTATransactionFactory</property>
    <property name="jta.UserTransaction">java:comp/UserTransaction</property>
    <property name="transaction.manager_lookup_class">net.sf.hibernate.transaction.WeblogicTransactionManagerLookup</property>
    <property name="show_sql">true</property>
    <property name="cache.use_query_cache">false</property>
    <property name="dialect">net.sf.hibernate.dialect.OracleDialect</property>
    <mapping resource="mapping.hbm.xml"/>
  </session-factory>
</hibernate-configuration>
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basterbrugge
 Post subject:
PostPosted: Wed Feb 16, 2005 9:48 am 
Newbie

Joined: Wed Sep 01, 2004 9:04 am
Posts: 18
Location: Enschede, Netherlands
Check out section 3.5.6 of the Hibernate reference:

http://www.hibernate.org/hib_docs/reference/en/html/session-configuration.html#configuration-optional-jndi

I think you need to specify the property hibernate.session_factory_name with value "java:/HibernateFactory", and the properties hibernate.jndi.url and hibernate.jndi.class to create the right InitialContext.
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Boo
 Post subject:
PostPosted: Wed Feb 16, 2005 12:43 pm 
Newbie

Joined: Mon Nov 22, 2004 2:11 pm
Posts: 6
Hi, thank you for the hint!
I changed the hibernate.cfg.xml and the source code accordingly. But I still receive the following exception:
Code:
javax.naming.NameNotFoundException: While trying to look up comp/env/hibernate/HibernateFactory in /app/ejb/EJBHibernateSampleClasses.jar#CustomerListSession.; remaining name 'comp/env/hibernate/HibernateFactory'
at sample.server.util.HibernateUtil.getSession(HibernateUtil.java:102)

I also tried "java:/HibernateFactory" as JNDI name. It did not work either.
Do you have any more hints?

Thanks for your time.

Michael

My hibernate.cfg.xml:
Code:
<hibernate-configuration>
  <session-factory name="java:comp/env/hibernate/HibernateFactory">
    <property name="connection.datasource">jdbc/HibernateSampleDS</property>
    <property name="transaction.factory_class">net.sf.hibernate.transaction.JTATransactionFactory</property>
    <property name="jta.UserTransaction">java:comp/UserTransaction</property>
    <property name="transaction.manager_lookup_class">net.sf.hibernate.transaction.WeblogicTransactionManagerLookup</property>
    <property name="hibernate.jndi.class">weblogic.jndi.WLInitialContextFactory</property>
    <property name="hibernate.jndi.url">t3://192.168.1.1:7011</property>
    <property name="hibernate.session_factory_name">java:comp/env/hibernate/HibernateFactory</property>
    <property name="show_sql">true</property>
    <property name="cache.use_query_cache">false</property>
    <property name="dialect">net.sf.hibernate.dialect.OracleDialect</property>
    <property name="hibernate.query.substitutions">true 1, false 0</property>
    <mapping resource="mapping.hbm.xml"/>
  </session-factory>
</hibernate-configuration>


My code in HibernateUtil:
Code:
private SessionFactory getSessionFactory() throws NamingException {
    InitialContext initCtx = new InitialContext( );
    return (SessionFactory) initCtx.lookup("java:comp/env/hibernate/HibernateFactory");
}
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basterbrugge
 Post subject:
PostPosted: Wed Feb 16, 2005 12:55 pm 
Newbie

Joined: Wed Sep 01, 2004 9:04 am
Posts: 18
Location: Enschede, Netherlands
Try to replace: <session-factory name="java:comp/env/hibernate/HibernateFactory">

with:

<session-factory name="hibernate/HibernateFactory">
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Boo
 Post subject:
PostPosted: Thu Feb 17, 2005 10:04 am 
Newbie

Joined: Mon Nov 22, 2004 2:11 pm
Posts: 6
Ok, I changed the config again, but it still does not work.
This is really strange. I wonder, if I have to make some configurations with the WebLogic console or the deployment descriptors...

Did you manage to successfully lookup a SessionFactory through JNDI within a Session Bean running on WebLogic 8.1?

Thanks for your time.

Michael
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basterbrugge
 Post subject:
PostPosted: Fri Feb 18, 2005 4:49 am 
Newbie

Joined: Wed Sep 01, 2004 9:04 am
Posts: 18
Location: Enschede, Netherlands
No, I didn't, just trying to check your configuration.

You also updated your config line

<property name="hibernate.session_factory_name">java:comp/env/hibernate/HibernateFactory</property>

to

<property name="hibernate.session_factory_name">hibernate/HibernateFactory</property>

?
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Boo
 Post subject:
PostPosted: Fri Feb 18, 2005 5:09 am 
Newbie

Joined: Mon Nov 22, 2004 2:11 pm
Posts: 6
I tried both versions.

Since I just want to imlement a HibernateUtil that synchronizes the hibernate session with transactions in a JTA environment of an ejb container transparently (as described in http://forum.hibernate.org/viewtopic.php?t=925357 and http://forum.hibernate.org/viewtopic.php?t=932394), and I can't find a code sample that works, I think I stop my research of the lookup problem now and move to Hibernate3 since it supports this feature (see at http://www.hibernate.org/245.html "Synchronizing Hibernate3 with JTA").

Anyway, thanks for your time.

Michael
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