Problem instantiating an entityBean

Question

Hi,
i'm using the CabinBean-example from O'reilly's EJB2.0 3rd edition.
i wrote the bean, the HomeRemote- and Remote-Interface, deployed it on jboss (it's creating the tables and says the jar-file is ok)
but when i run the client, it says:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.ServerException: EJBException:; nested exception is:
javax.ejb.EJBException: Could not instantiate bean; nested exception is: java.lang.InstantiationException
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:292)
at sun.rmi.transport.Transport$1.run(Transport.java:148)
this is the client code:
package com.titan.cabin;
import com.titan.cabin.CabinHomeRemote;
import com.titan.cabin.CabinRemote;
import javax.naming.InitialContext;
import javax.naming.Context;
import javax.naming.NamingException;
import java.rmi.RemoteException;
import java.util.Properties;
import javax.rmi.PortableRemoteObject;
public class CabinClient1 {
public static void main(String[] args) {
try {
Context jndiContext = getInitialContext();
Object ref = jndiContext.lookup("CabinEJB");
CabinHomeRemote home = (CabinHomeRemote)
PortableRemoteObject.narrow(ref, CabinHomeRemote.class);
CabinRemote cabin_1 = home.create(new Integer(1));
cabin_1.setName("Master Suite");
cabin_1.setDeckLevel(1);
cabin_1.setShipId(1);
cabin_1.setBedCount(3);
Integer pk = new Integer(1);
CabinRemote cabin_2 = home.findByPrimaryKey(pk);
System.out.println(cabin_2.getName());
System.out.println(cabin_2.getDeckLevel());
System.out.println(cabin_2.getShipId());
System.out.println(cabin_2.getBedCount());
} catch (java.rmi.RemoteException re) { re.printStackTrace(); }
catch (javax.naming.NamingException ne) { ne.printStackTrace(); }
catch (javax.ejb.CreateException ce) { ce.printStackTrace(); }
catch (javax.ejb.FinderException fe) { fe.printStackTrace(); }
public static Context getInitialContext()
throws javax.naming.NamingException {
Properties props = System.getProperties();
props.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
props.put(Context.PROVIDER_URL, "jnp://localhost:1099");
return new javax.naming.InitialContext(props);
i hope someone is able to help me ...
thanks
fb

Answer 1

i think u r going in worng way,u intiallize home by "CabinHomeRemote"
bt hor jboss would know what is "CabinHomeRemote"
CabinHomeRemote home = (CabinHomeRemote)
ur client code should be like this:
Context ctx = null;
Properties prop = new Properties();
prop.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
prop.put(Context.PROVIDER_URL, "localhost:1099");
     prop.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces" );
     ctx = new InitialContext(prop);
//lookup ur bean
Object objref = ctx.lookup("CabinEJB");
CabinHomeRemote home =
(CabinHomeRemote)javax.rmi.
PortableRemoteObject.narrow(objref,
CabinHomeRemote.class);
CabinRemote cabin_1 = home.create(new Integer(1));
ok and before it plz read some document abt EJB. i think u r little bit confuse
regards
sachin