Weblogic EJB deployment problem (LocalObject Interface problem)

Right, can't quite work this one out. I have an EAR containing several local EJBs which I can deploy fine on Webshere / Orion. I decided that I'd try deploying these to Weblogic 7 App server today, as I'm going to be using that for some upcoming projects.

Using the deployment tool (Weblogic builder) i get the following errors when I try to open the EAR file:

///////////////////////////////////////////////////////////////
Inspecting input J2EE module engine-ejb.jar
[EarCMBean] ejb module uri=engine-ejb.jar

Loaded descriptor file META-INF/ejb-jar.xml
......
Discovered module type for engine-ejb.jar
Found EJB components. Initializing descriptors
Found EJBHome: pjg.ejb.SenderServiceLocalHome
Cannot determine bean class for interface 'pjg.ejb.SenderLocalService'
Found EJBHome: pjg.ejb.OpServiceLocalHome
Cannot determine bean class for interface 'pjg.ejb.OpLocalService'

Removing bean pjg/SenderServiceEJB
Removing bean pjg/OpServiceEJB

//////////////////////////////////////////////////////////////////

Using Weblogic admin console to deploy these I just get a compilation error. Now, I've done some investigation into the matter myself, and the Local Interfaces both have superinterfaces which describing the Business Method signatures ie:

// Superclass:
public interface SenderService {
      public mData send(mData msg);
}

// Local Interface:
public interface SenderLocalService
      extends SenderService, EJBLocalObject {
}

// Bean class:
public class SenderServiceBean
implements SenderService {

      public void ejbCreate() throws CreateException {
      }

      public mData send(mData msg) {
                    mData newMsg = ....
                    // blah blah
          return newMsg;
      }
....

// Other ejbMethods implemented
....
}


Like I say, this model seems to work fine with other app servers (although I can't see the point of the superinterfaces to be honest), but not with Weblogic. Now, when I get rid of the superinterfaces and put the business methods into the class which extends ejbLocalObject it all deploys very nicely, Weblogic just doesn't seem to like the fact that the Local Interface is extending both the sender superclass and EJBLocalObject.

So, in a nutshell, what I want to know is "Is there any reason that a Local Interface can't Extend both these classes?" It all seems to boil down to the app servers EJB class generation, but I'd like to know for sure!

If anyone needs any more info just let me know...

Cheers,

Pete  
 
pjgouldAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

vzilkaCommented:
First of all, it definitely seems very strange. Why should WebLogic Server care about this? It doesn't really make sense.

Can you please put the ejb-jar.xml file and the weblogic-ejb-jar.xml files here? It might help us...
0
pjgouldAuthor Commented:
Hiya, Sure thing. Here's the ejb-jar.xml file before I run it through Weblogic Builder:

<?xml version="1.0"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
<ejb-jar>
   <description>Engine EJBs</description>

   <enterprise-beans>
      <session>
         <description>Core Service</description>
         <display-name>CoreServiceJAR</display-name>
         <ejb-name>pjg/CoreServiceEJB</ejb-name>
         <home>pjg.core.ejb.CoreServiceHome</home>
         <remote>pjg.core.ejb.CoreRemoteService</remote>
         <ejb-class>pjg.core.ejb.CoreServiceBean</ejb-class>
         <session-type>Stateless</session-type>
         <transaction-type>Bean</transaction-type>
      </session>

      <session>
         <description>The sender service.</description>
            <display-name>SenderServiceJAR</display-name>
         <ejb-name>pjg/SenderServiceEJB</ejb-name>
         <local-home>pjg.ejb.SenderServiceLocalHome</local-home>
         <local>pjg.ejb.SenderLocalService</local>
         <ejb-class>pjg.ejb.SenderServiceBean</ejb-class>
         <session-type>Stateless</session-type>
         <transaction-type>Bean</transaction-type>
         <env-entry>
            <description>Implementation Class</description>
            <env-entry-name>ImplClass</env-entry-name>
            <env-entry-type>java.lang.String</env-entry-type>
            <env-entry-value>pjg.ejb.SenderServiceStub</env-entry-value>
         </env-entry>
      </session>

      <session>
         <description>The operator service.</description>
            <display-name>OpServiceJAR</display-name>
         <ejb-name>pjg/OpServiceEJB</ejb-name>
         <local-home>pjg.ejb.OpServiceLocalHome</local-home>
         <local>pjg.ejb.OpLocalService</local>
         <ejb-class>pjg.ejb.OpServiceBean</ejb-class>
         <session-type>Stateless</session-type>
         <transaction-type>Bean</transaction-type>
         <env-entry>
            <description>Implementation Class</description>
            <env-entry-name>ImplClass</env-entry-name>
            <env-entry-type>java.lang.String</env-entry-type>
            <env-entry-value>pjg.ejb.OpServiceStub</env-entry-value>
         </env-entry>
      </session>

   </enterprise-beans>
</ejb-jar>

At this point I don't have a weblogic-ejb-jar.xml (Do I need one - I thought that the builder should generate this).

Then I open my Ear file in the Weblogic Builder, and receive the message:

"Found ejb-jar.xml but couldn't find weblogic-ejb-jar.xml

Would you like new descriptors created for you? The existing ejb-jar.xml will be preserved".

To which I answered yes (otherwise I have an exception occuring as there's no weblogic-ejb-jar.xml).

Upon looking at the xml files that are created I have:


<ejb-jar>
  <description><![CDATA[Engine EJBs]]></description>
  <enterprise-beans>
    <session>
      <description><![CDATA[Core Service]]></description>
      <display-name>CoreServiceJAR</display-name>
      <ejb-name>pjg/CoreServiceEJB</ejb-name>
      <home>pjg.core.ejb.CoreServiceHome</home>
      <remote>pjg.core.ejb.CoreRemoteService</remote>
      <ejb-class>pjg.core.ejb.CoreServiceBean</ejb-class>
      <session-type>Stateless</session-type>
      <transaction-type>Bean</transaction-type>
    </session>
  </enterprise-beans>

</ejb-jar>


and:

<weblogic-ejb-jar>
  <weblogic-enterprise-bean>
    <ejb-name>pjg/CoreServiceEJB</ejb-name>
    <stateless-session-descriptor>
      <pool>
      </pool>

      <stateless-clustering>
      </stateless-clustering>

    </stateless-session-descriptor>

    <transaction-descriptor>
    </transaction-descriptor>

    <jndi-name>pjg/CoreServiceEJB</jndi-name>
  </weblogic-enterprise-bean>
</weblogic-ejb-jar>

ie. it seems to have "lost" my local ejbs.

Am I using this tool in the wrong way?

Thanks.

Pete
0
vzilkaCommented:
In WLS 7.0 the builder tool is garbage. Tons of bugs. Don't even try it for MDB and JMS.
I enclose a link to the format of the weblogic-ejb-jar.xml http://edocs.bea.com/wls/docs70/ejb/reference.html#1026457

Basically you have to create the template for the files using the builder.
Then fix the ejb-jar.xml file so it will contain the local interfaces you require.
If needed (I don't think you have to, but post questions here if you need) edit weblogic-ejb-jar.xml and add the ejb-local-reference-description tag.

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
pjgouldAuthor Commented:
Hiya, I got the ear deployed in the end.

Cheers for that.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Java App Servers

From novice to tech pro — start learning today.