1 Reply Latest reply on Jul 9, 2008 8:18 AM by Sara Rodríguez Dorrego

    Referencing EJB 2.1 session from EJB 3 session

    Arto Huusko Newbie

      How can I access EJB 2.1 session from EJB 3 session in JBoss 4.2.1.GA?

      The EJB 3 sessions and EJB 2.1 session are deployed in separate EJB jar files, but they are in the same EAR file, so they are part of the same J2EE application.

      I have tried the following methods:

      Injecting EJB 2.1 home using EJB annotation, simply like this:

      @EJB
      private foo.bar.SomeLocalHome someHome;

      results in the error:

      java.lang.RuntimeException: could not resolve global JNDI name for @EJB for container WhatEver: reference class: foo.bar.SomeLocalHome ejbLink: not used by any EJBs

      Which is not true, because that LocalHome class is used by a EJB 2.1 session bean.

      Injecting local interface using EJB annotation:

      @EJB
      private foo.bar.SomeLocal some;

      results in the same error.

      Injections with beanName set:

      @EJB(beanName = "Some")
      private foo.bar.SomeLocalHome someHome;

      result in error

      java.lang.RuntimeException: Failed to populate ENC: env/foo.bar.WhatEver/someHome global jndi name was null

      Adding local reference to ejb-jar.xml, like so:


      <ejb-name>WhatEver</ejb-name>
      <ejb-local-ref>
      <ejb-ref-name>Some</ejb-ref-name>
      <ejb-ref-type>Session</ejb-ref-type>
      <local-home>foo.bar.SomeLocalHome</local-home>
      <ejb-link>Some</ejb-link>
      </ejb-local-ref>


      and injecting like so:

      @EJB(name = "Some")
      private SomeLocalHome someHome;

      fails because JBoss complains that "IGNORING DEPENDENCY ... too little information".

      Creating the local ref like so


      <ejb-name>WhatEver</ejb-name>
      <ejb-local-ref>
      <ejb-ref-name>Some</ejb-ref-name>
      <ejb-ref-type>Session</ejb-ref-type>
      <local-home>foo.bar.SomeLocalHome</local-home>
      foo.bar.SomeLocalHome
      <ejb-link>Some</ejb-link>
      </ejb-local-ref>


      fails because

      15:25:51,749 WARN [EJBHandler] IGNORING DEPENDENCY: unable to find <ejb-local-ref> of interface foo.bar.SomeLocal and ejbLink of Some in ejb-jar.xml of WhatEver it might not be deployed yet


      Looking at the code (I think I found the correct place), the local-ref handling code simply ignores local-home, and seems to search for EJB that implements the local interface, which is daft when I want to link to EJB 2.1.

      Maybe injection without JNDI name (the first attempt above) fails for a similar reason?


      I'm currently looking up the local home interface manually (new InitialContext().lookup("Some")), and it works, but this is not very nice.