1 Reply Latest reply on Aug 3, 2006 12:41 PM by David Owens

    SFSB and the Entity Manager Extended Persistence Context

    David Owens Newbie

      I'm having a problem with trying to create a SFSB with an injected EntityManager that has an EXTENDED context:

      @Stateful(name="OrderService", mappedName="OrderService")
      @Local(Order.class)
      public class OrderBean implements Order {
      
       @PersistenceContext(type = PersistenceContextType.EXTENDED, unitName = "persistence")
       protected EntityManager em;
       Company company = null;
      
       @PersistenceContext(type = PersistenceContextType.EXTENDED, unitName = "persistence")
       public void setEM(EntityManager em) {
       this.em = em;
       }
      
       public Company getCompany(Integer Id) {
       company = em.find(Company.class, new Integer(1));
       return company;
       }
      
       @Remove
       public void remove(){}
      
       @javax.ejb.PostActivate
       public void postActivate(){
       System.out.println("postactivating order");
       }
      
       @javax.ejb.PrePassivate
       public void prePassivate(){
       System.out.println("passivating order");
       }
      
       public void doSomethingElse() {
       System.out.println("Doing something else");
       }
      
       public Company getCompanyBack() {
       return company;
       }
      }


      At first everything works great. I lookup the SFSB from a jsp and call getCompany() which returns me the company. I then stick the reference to the SFSB interface into the http session. I hit another jsp which get's the SFSB interface from the session and calls getCompanyBack() and all is well. I can even walk lazy collections on the company with no problem.

      However, if I wait a while, the SFSB will passivate without error:
      2006-08-03 09:56:12,987 DEBUG [org.jboss.ejb3.cache.simple.StatefulSessionFilePersistenceManager] Attempting to passivate; id=4sg3q-kqtq3k-eqfaw0yg-1-eqfaxk9s-7
      2006-08-03 09:56:12,987 INFO [STDOUT] passivating order
      2006-08-03 09:56:12,987 DEBUG [org.jboss.ejb3.cache.simple.StatefulSessionFilePersistenceManager] Saving session state to: D:\jboss\jboss-4.0.4.GA.P1\server\default\tmp\sessions\OrderService-eqfax4z0-6\4sg3q-kqtq3k-eqfaw0yg-1-eqfaxk9s-7.ser
      2006-08-03 09:56:13,222 DEBUG [org.hibernate.impl.SessionFactoryImpl] serializing: 2c90839a0cd4b626010cd4b62e660000
      2006-08-03 09:56:13,222 DEBUG [org.jboss.ejb3.cache.simple.StatefulSessionFilePersistenceManager] Passivation complete; id=4sg3q-kqtq3k-eqfaw0yg-1-eqfaxk9s-7


      Then I try to hit the jsp page again, and it throws up trying to call getCompanyBack() complaining that it cannot find the SFSB:
      2006-08-03 10:02:38,065 DEBUG [org.jboss.ejb3.cache.simple.StatefulSessionFilePersistenceManager] Attempting to activate; id=4sg3q-kqtq3k-eqfaw0yg-1-eqfaxk9s-7
      2006-08-03 10:02:38,065 DEBUG [org.jboss.ejb3.cache.simple.StatefulSessionFilePersistenceManager] Reading session state from: D:\jboss\jboss-4.0.4.GA.P1\server\default\tmp\sessions\OrderService-eqfax4z0-6\4sg3q-kqtq3k-eqfaw0yg-1-eqfaxk9s-7.ser
      2006-08-03 10:02:38,112 DEBUG [org.jboss.ejb3.cache.simple.StatefulSessionFilePersistenceManager] Removing passivated state file: D:\jboss\jboss-4.0.4.GA.P1\server\default\tmp\sessions\OrderService-eqfax4z0-6\4sg3q-kqtq3k-eqfaw0yg-1-eqfaxk9s-7.ser 2006-08-03 10:02:38,190 DEBUG [org.hibernate.impl.SessionFactoryObjectFactory] lookup: uid=2c90839a0cd4b626010cd4b62e660000
      2006-08-03 10:02:38,190 WARN [org.hibernate.impl.SessionFactoryObjectFactory] Not found: 2c90839a0cd4b626010cd4b62e660000
      2006-08-03 10:02:38,190 DEBUG [org.hibernate.impl.SessionFactoryObjectFactory] {2c90839a0cd4b656010cd4b65da40000=org.hibernate.impl.SessionFactoryImpl@1cbcc56}
      


      Then there is a long exception ending in:
      Caused by: java.io.InvalidObjectException: could not locate session factory by uuid [2c90839a0cd4b626010cd4b62e660000] during session deserialization
       at org.hibernate.impl.SessionFactoryImpl.deserialize(SessionFactoryImpl.java:1038)
       at org.hibernate.impl.SessionImpl.readObject(SessionImpl.java:1866)
       ... 76 more


      I was using JBoss 4.0.4.GA-Patch1, then I tried the same install with EJB-3.0_RC8-FD installed on top, which also didn't work.

      If I remove the EntityManager from the SFSB, (and use other parts of the SFSB) then it works as expected, passivating and activating.

      I even tried making the em transient and marking it @Transient, but it yeilds the same error.

      I've looked around and done some reading, and it seems unclear if I should be able to do this with an EXTENDED context in an SFSB, but I'm following the example here:
      http://docs.jboss.org/ejb3/app-server/tutorial/extended_pc/extended.html

      Any help would be appreciated. Can this be done, is it not fully implemented yet? Is there a work around?

      Thanks

        • 1. Re: SFSB and the Entity Manager Extended Persistence Context
          David Owens Newbie

          Sorry, I didn't originally have both of these. But I've tried both with the property injection and the setEM() injection, neither worked. I forgot to remove the setEM() from the example I posted. Anyway, yeah, neither way works. :)

           @PersistenceContext(type = PersistenceContextType.EXTENDED, unitName = "persistence")
           public void setEM(EntityManager em) {
           this.em = em;
           }
          

          public Company getCompany(Integer Id) {
           company = em.find(Company.class, new Integer(1));
           return company;
           }