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List:       jboss-user
Subject:    [JBoss-user] PortableRemoteObject.narrow(PortableRemoteObject.java:293) and ClassCastException
From:       Stuart Barlow <sbarlow () peopledoc ! com>
Date:       2003-03-31 9:04:37
[Download RAW message or body]

Yes its this one again. I have a simple SessionBean in jBoss
3.0.6 and a simple client. I have used xdoclet to generate
the EJB code. I read in an earlier mail that ClassCastException
is thrown from PortableRemoteObject for a number of reasons
not just a casting error. Is this true? What other problems
can cause this?

SERVER START

class has this...
  * @ejb.bean         name="mull/HummingbirdFusionAdaptorIntf"
  *                   description="SessionBean interface to Mull server"
  *                   jndi-name="com/hc/mull/HummingbirdFusionAdaptorEJB"
  *                   type="Stateless"

each exposed method has this...
* @ejb.interface-method view-type="remote"


this is the xdoclet generated home class...
public interface HummingbirdFusionAdaptorIntfHome
    extends javax.ejb.EJBHome
{
    public static final String 
COMP_NAME="java:comp/env/ejb/mull/HummingbirdFusionAdaptorIntf";
    public static final String JNDI_NAME="com/hc/mull/HummingbirdFusionAdaptorEJB";

    public com.peopledoc.dmintegration.module.HummingbirdFusionAdaptorIntf create()
       throws javax.ejb.CreateException,java.rmi.RemoteException;

}

SERVER END


CLIENT CODE START

java.util.Hashtable contextProps = new java.util.Hashtable();
             contextProps.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY, 
"org.jnp.interfaces.NamingContextFactory");
             contextProps.put(javax.naming.Context.PROVIDER_URL, 
"jnp://localhost:1099/");
             contextProps.put(javax.naming.Context.URL_PKG_PREFIXES, 
"org.jboss.naming:org.jnp.interfaces");
             contextProps.put("jnp.socketFactory", 
"org.jnp.interfaces.TimedSocketFactory");
             contextProps.put("jnp.timeout", "0");
             contextProps.put("jnp.sotimeou", "0");

             javax.naming.Context lContext = new InitialContext(contextProps);
             HummingbirdFusionAdaptorIntfHome lHome = 
(HummingbirdFusionAdaptorIntfHome)
                 PortableRemoteObject.narrow(
                     lContext.lookup(HummingbirdFusionAdaptorIntfHome.JNDI_NAME),
                     HummingbirdFusionAdaptorIntfHome.class);

CLIENT CODE END

Thanks for any pointers.
Ta.
Stuart.



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