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Dynamic Calling of EJB


I want to call an EJB in NetWeaver. I don't know the class of its Home Interface. I only know its JNDI name. So I use the following method.

1. Context context = new InitialContext();

2. Object home = context.lookup( name );

3. EJBHome ejbHome =(EJBHome) PortableRemoteObject.narrow (home, EJBHome.class);

But I got the exception "java.lang.ClassCastException: javax.ejb.EJBHome" when the program runs into 3.

I check the "home" variable, its type is "class".

Could somebody tell me why this doesn't work? Is there any way to call an EJB when we don't know the Home Interface type and only know its JNDI name and the business method?

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  • author's profile photo Former Member
    Former Member
    Posted on May 30, 2005 at 08:06 AM

    Hi Jerome

    For each enterprise bean, the EJB-jar file must include the following class files:

    1)Bean class

    2)Home and Remote Interfaces

    3)Primary key class, if the bean is an entity bean

    Context initialContext = new InitialContext();

    AccountHome accountHome = (AccountHome)





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    • Hi Vesselin,

      Thanks a lot for the information. The caller is an EJB. As far as I know, one EJB cannot access classes of other EJB if the <ejb-ref> element of the caller's ejb-jar.xml is not set to be the called EJB. However, in our scenario, the called EJB is developed after the caller EJB is deployed to NetWeaver. So the caller cannot put the reference to the called EJB in its ejb-jar.xml file. So how can we make the classes of later-deployed EJB visible to the earlier-deployed EJB?

      Best Regards


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