Re: Using Hibernate within a portlet

Hi David,

you were right. The problem was in my HibernateUtil class. I tried to 
get a session like this:

    public static final ThreadLocal<Session> session = new 
ThreadLocal<Session>();
   
    public static Session currentSession() throws HibernateException {
        Session s = session.get();
        // If there is no session create one
        if(s==null){
            s = sessionFactory.openSession();
            session.set(s);
        }
        return s;
    }
   
    public static void closeSession() throws HibernateException {
        Session s = session.get();
        if(s != null){
            s.close();
        }
        session.set(null);
    }

After removing generics and adding the necessary casts it worked (though 
I don't understand the difference yet).

Regards,
Andi

>It seems to me that this is more of a hibernate problem than a pluto
>problem.  really, getting hibernate to work within a portlet should be
>no different than doing it within a webapp.
>
>Perhaps a stack trace and/or code snippet would help us get more specific.
>
>
>David
>On 12/3/05, Andreas Buechler <[email protected]> wrote:
>  
>
>>Hi,
>>
>>in my portlet I'm trying to access the db over hibernate. Unfortunately
>>this doesn't seem to be very reliable (at least how I configured it...).
>>After googeling a little I found out that the "Hibernate Reference
>>Documentation v3.0.5"  isn't quite up to date and that you don't have to
>>use Tomcat's JNDI-bound JDBC connections anymore [2].
>>
>>My problem is now that it still doesn't work in a  reliable way. The
>>symptoms are that if I access the portlet for the first time the db
>>query is (mostly) successful. After that I get NullPointerExceptions. To
>>make sure it's not my hibernate code, I tried the same query in
>>standalone application (without Tomcat/Pluto). It worked without any
>>problems.
>>
>>Does anybody have a clue what's going wrong here? How did you get
>>hibernate to work reliable within your portlet? Any hints or suggestions
>>are highly appreciated!
>>
>>
>>[1] http://www.hibernate.org/hib_docs/v3/reference/en/html/quickstart.html
>>[2] http://www.hibernate.org/114.html
>>
>>Regards,
>>Andi
>>
>>
>>    
>>