Accessing EJB entity bean from the Java client application

[i262666]

Hi, I am new to JBoss, so I would appreciate some help.

I developed a simple entity bean and see it being deployed on the server. It uses the JBoss provided default database. Next I developed a simple java application client. When selecting Rus AS Application I am getting the following error message indicating that the client is unable to connect to the remote EJB

javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial

  at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:673)

  at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:324)

  at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:361)

  at javax.naming.InitialContext.lookup(InitialContext.java:428)

  at com.titan.clients.Client_1.main(Client_1.java:21)

Here is my 2 interfaces and the class, witch are compiled without errors.

Interface  CabinHomeRemote

package com.titan.clients;

import javax.ejb.EJBHome;

import java.rmi.RemoteException;

import javax.ejb.CreateException;

import javax.ejb.FinderException;

public interface CabinHomeRemote extends EJBHome

{

public CabinRemote create(Integer id)

    throws CreateException, RemoteException;

public CabinRemote findByPrimaryKey(Integer pk)

  throws FinderException, RemoteException;

}

Interface CabinHomeRemote:

package com.titan.clients;

import javax.ejb.EJBHome;

import java.rmi.RemoteException;

import javax.ejb.CreateException;

import javax.ejb.FinderException;

public interface CabinHomeRemote extends EJBHome

{

public CabinRemote create(Integer id)

    throws CreateException, RemoteException;

public CabinRemote findByPrimaryKey(Integer pk)

  throws FinderException, RemoteException;

}

Class for the client:

package com.titan.clients;

import com.sun.xml.internal.fastinfoset.sax.Properties;

import com.titan.clients.CabinHomeRemote;

import com.titan.clients.CabinRemote;

import javax.naming.InitialContext;

import javax.naming.Context;

import javax.naming.NamingException;

import javax.rmi.PortableRemoteObject;

import java.rmi.RemoteException;

public class Client_1

{

   public static void main(String [] args)

   {

      try

      {

         Context jndiContext = getInitialContext();

         Object ref = jndiContext.lookup("CabinHomeRemote");

         // Object ref = jndiContext.lookup("java:comp/env/ejb/CabinHomeRemote");

         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

   {

      return new InitialContext();

   }

}

application-client.xml:

<?xml version="1.0" encoding="UTF-8"?>

<application-client version="6" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application-client_6.xsd">

<display-name>CabinClient</display-name>

  </application-client>

Thanks

[jaysensharma]

I am assuming that you are using JBossAS 5/6  (Not AS7 or later) Hence can you please try changing your "getInitialContext()" method implementation as following:

public static Context getInitialContext() throws javax.naming.NamingException {
   Hashtable jndiProperties = new Hashtable();
   jndiProperties.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
   jndiProperties.put(Context.PROVIDER_URL, "localhost:1099");    // CHANGE ME !!!
   return new InitialContext(jndiProperties);
}

Where  "localhost" is your JBoss Bind address (in your case it might be different), Similarly the 1099 is the default JNP port (In your case it might be different)

For a complete example please refer to:

Developing and Running a Stateless Session Bean 3.0 in JBoss AS6 «  JBoss     :     http://middlewaremagic.com/jboss/?p=53

Regards

Jay SenSharma