8 Replies Latest reply on Aug 12, 2002 3:12 PM by Ernst

    does JBoss support ejb-local-ref in web.xml

    Ernst Newbie

      Hello,

      I'm trying to have a servlet link to a local EJB. Here is the relevant web.xml declaration I have in test.war:
      <ejb-local-ref>
      <ejb-ref-name>CanliiPublicationBrokerEJB</ejb-ref-name>
      <ejb-ref-type>Session</ejb-ref-type>
      <local-home>org.canlii.ejb.CanliiPublicationBrokerLocalHome</local-home>
      org.canlii.ejb.CanliiPublicationBrokerLocal
      <ejb-link>CanliiPublicationBrokerEJB</ejb-link>
      </ejb-local-ref>

      Here is the relevent section in ejb-jar.xml located in my jar module named canliidb.jar:


      <display-name>CanliiPublicationBrokerEJB</display-name>
      <ejb-name>CanliiPublicationBrokerEJB</ejb-name>
      <local-home>org.canlii.ejb.CanliiPublicationBrokerLocalHome</local-home>
      org.canlii.ejb.CanliiPublicationBrokerLocal
      <ejb-class>org.canlii.ejb.CanliiPublicationBrokerEJB</ejb-class>
      <session-type>Stateful</session-type>
      <transaction-type>Container</transaction-type>
      <security-identity>

      <use-caller-identity></use-caller-identity>
      </security-identity>


      When I deploy these modules separatly I get the following error:

      org.jboss.deployment.DeploymentException: ejb-local-ref: CanliiPublicationBrokerEJB, target not found, add valid ejb-link; - nested throwable: (javax.naming.NamingException: ejb-local-ref: CanliiPublicationBrokerEJB, target not found, add valid ejb-link)

      I even tried to package these modules together in an ear but I get the same error. Am I doing something wrong? Does JBoss support local references to EJBs in servlets?
      Thanks,

        • 1. Re: does JBoss support ejb-local-ref in web.xml
          JC Newbie

          In your web.xml, did you try the following DOCTYPE:

          <!DOCTYPE web-app PUBLIC
          "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
          "http://java.sun.com/dtd/web-app_2_3.dtd">


          • 2. Re: does JBoss support ejb-local-ref in web.xml
            Ernst Newbie

            Yes, I certainly did. But it didn;t do no good.

            • 3. Re: does JBoss support ejb-local-ref in web.xml
              JC Newbie

              I ran Oracle's CMP example in JBoss-3.0.0_Tomcat-4.0.3

              In my war file, I have the following in web.xml:
              <ejb-local-ref >
              <ejb-ref-name>ejb/Dept</ejb-ref-name>
              <ejb-ref-type>Entity</ejb-ref-type>
              <local-home>ejb.cmplocal.DeptLocalHome</local-home>
              ejb.cmplocal.DeptLocal
              <ejb-link>Dept</ejb-link>
              </ejb-local-ref>

              (the Dept entity bean is called in a JSP page)

              In my ejb-jar.xml, I have the following:
              <!-- Entity Beans -->

              <display-name>Department Bean</display-name>
              <ejb-name>Dept</ejb-name>
              <local-home>ejb.cmplocal.DeptLocalHome</local-home>
              ejb.cmplocal.DeptLocal
              <ejb-class>ejb.cmplocal.DeptBean</ejb-class>
              ....


              And I packaged web and ejb into ear file.

              • 4. Re: does JBoss support ejb-local-ref in web.xml
                Ernst Newbie

                That's it. The only way this seems to work is if you package everything in an ear file and have an <ejb-link> element linking directly to the Bean. But I was wondering how could I link to a previously deployed bean that was in another jar file by using its JNDI name. Meaning I want to do somehting like:

                previously deployed jar:
                (ejb-jar.xml)

                <display-name>DatabaseBrokerEJB</display-name>
                <ejb-name>DatabaseBrokerEJB</ejb-name>
                DatabaseBrokerHome
                DatabaseBroker
                <ejb-class>DatabaseBrokerEJB</ejb-class>
                ...


                (jboss.xml)


                <ejb-name>DatabaseBrokerEJB</ejb-name>
                <jndi-name>ejb/SimpleDatabaseBroker</jndi-name>



                my servlet war file:
                (web.xml)
                <ejb-ref>
                <ejb-ref-name>ejb/DatabaseBrokerHome</ejb-ref-name>
                DatabaseBrokerHome
                DatabaseBroker
                </ejb-ref>

                (jboss-web.xml)

                <ejb-ref>
                <ejb-ref-name>ejb/DatabasebrokerHome</ejb-ref-name>
                <jndi-name>ejb/SimpleDatabaseBroker</jndi-name>
                </ejb-ref>


                As I understand it JBoss should use the jndi name ejb/SimpleDatabaseBroker to link my servlet with the previously deployed bean DatabaseBrokerEJB and I shouldn't have to package everything in a ear file. Am I wrong?

                Thanks for the help. I appreciate.

                • 5. Re: does JBoss support ejb-local-ref in web.xml
                  Adrian Brock Master

                  The servlet spec isn't very specific.

                  The ejb spec says
                  20.3.2 Application Assembler's reponsibilities

                  "The target enterprise bean can be in any ejb-jar file in
                  the same J2EE application as the referencing application
                  component."

                  Which doesn't actually disallow what you want, if
                  you read it carefully.

                  But yes, JBoss only looks in the same deployment.

                  If you want it, code it and submit the patch on
                  sourceforge.

                  Regards,
                  Adrian

                  • 6. Re: does JBoss support ejb-local-ref in web.xml
                    Adrian Brock Master

                    I forgot to mention,

                    You can specify a <jndi-name> in jboss-web.xml
                    for ejb-ref (but not ejb-local-ref) which will
                    let you bind an ejb-ref to an ejb outside
                    the deployment.

                    Regards,
                    Adrian

                    • 7. Re: does JBoss support ejb-local-ref in web.xml
                      Ernst Newbie

                      Well actually it doesn't quite work (see JNDI question topic posted today). Maybe I'm doing somethign wrong but When I deploy the first jar with the DatabaseBrokerEJB bean, it's not bound to the <jndi-name> I specify in jboss.xml. For some reason, it's bound to the <ejb-name> found in the ejb-jar.xml. I know this is the default behavior, but how come Jboss doesn't use the name specified in jboss.xml? Is it a bug? or do I have to configure something. Here the relevant part of my server.log

                      2002-08-12 12:42:22,656 DEBUG [org.jboss.ejb.StatelessSessionContainer] Begin java:comp/env for EJB: DatabaseBrokerEJB
                      2002-08-12 12:42:22,656 DEBUG [org.jboss.ejb.StatelessSessionContainer] TCL: java.net.URLClassLoader@33c658
                      2002-08-12 12:42:22,657 DEBUG [org.jboss.ejb.StatelessSessionContainer] Binding an EJBLocalReference ejb/Legislation
                      2002-08-12 12:42:22,658 DEBUG [org.jboss.ejb.StatelessSessionContainer] Binding ejb/Legislation to bean source: LegislationEJB
                      2002-08-12 12:42:22,659 DEBUG [org.jboss.ejb.StatelessSessionContainer] Binding an EJBLocalReference ejb/CollectionType
                      2002-08-12 12:42:22,659 DEBUG [org.jboss.ejb.StatelessSessionContainer] Binding ejb/CollectionType to bean source: CollectionTypeEJB
                      2002-08-12 12:42:22,659 DEBUG [org.jboss.ejb.StatelessSessionContainer] Binding an EJBLocalReference ejb/Jurisdiction
                      2002-08-12 12:42:22,660 DEBUG [org.jboss.ejb.StatelessSessionContainer] Binding ejb/Jurisdiction to bean source: JurisdictionEJB
                      2002-08-12 12:42:22,660 DEBUG [org.jboss.ejb.StatelessSessionContainer] Binding an EJBLocalReference ejb/Collection
                      2002-08-12 12:42:22,661 DEBUG [org.jboss.ejb.StatelessSessionContainer] Binding ejb/Collection to bean source: CollectionEJB
                      2002-08-12 12:42:22,662 DEBUG [org.jboss.ejb.StatelessSessionContainer] End java:comp/env for EJB: DatabaseBrokerEJB
                      2002-08-12 12:42:22,662 DEBUG [org.jboss.ejb.plugins.local.BaseLocalContainerInvoker] DatabaseBrokerEJB cannot be Bound, doesn't have local and local home interfaces
                      2002-08-12 12:42:23,075 DEBUG [org.jboss.proxy.ejb.ProxyFactory] Bound DatabaseBrokerEJB to DatabaseBrokerEJB

                      Shouldn't the ProxyFactory object user the name specified in jboss.xml?

                      Thanks

                      • 8. Re: does JBoss support ejb-local-ref in web.xml
                        Ernst Newbie

                        Ok someone pointed out my mistake in my deployment descriptors. Thanks, for your help