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PortableRemoteObject exception  RSS feed

 
Jait Thomas
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Posts: 31
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Im using weblogic 8.1 as server, and currently in the process of creating a simple program - 'hello world'. Im new to EJB.I used weblogic workshop for the process of development. So, i didnt had to create any xml file, since it created that itself. I have got 3 java files in a package. The program is a bit modified version of u r helloworld program. I also have a jsp file, which invokes the bean. It has a file called HelloWorldRemoteHome, HelloWorldRemote and HelloWorldBean.

Problem: When im trying to run the jsp file in a browser, im getting a PortableRemoteException when used as a Remote interface and Classcastexception when used as a Local interface. Can u please tell me why this problem occurs?

/////////HelloWorldBean.java////////////////
package my.pkg;
import javax.naming.*;
import javax.ejb.*;
import weblogic.ejb.*;
import java.rmi.RemoteException;
/**
* @ejbgen:session
* ejb-name = HelloWorld
*
* @ejbgen:jndi-name
* remote="HelloWorldBean.Hellor"
*
*
*/
public class HelloWorldBean implements SessionBean
{
private HelloWorldRemoteHome Hellohome;
public void ejbCreate() {
try {
javax.naming.Context ic = new InitialContext();
Hellohome = (HelloWorldRemoteHome)ic.lookup("HelloWorldbean.Hellor");
} catch (NamingException ne) {
throw new EJBException(ne); }
System.out.println("EJB Create HelloWorldBean");
// Your code here }
public void ejbActivate(){}
public void ejbPassivate(){}
public void ejbRemove(){}
public void setSessionContext(SessionContext ctx){}
/**
* @ejbgen:remote-method
*/
public String helloWorld()
{
return "hello world";
}
}
/////////HelloWorldRemoteHome.java////////////////
package my.pkg;
public interface HelloWorldRemoteHome extends javax.ejb.EJBHome
{
HelloWorldRemote create() throws java.rmi.RemoteException,javax.ejb.CreateException;
}
/////////////////////////////////////////////////
////////HelloWorldRemote.java//////////////////
package my.pkg;
public interface HelloWorldRemote extends javax.ejb.EJBObject
{
String helloWorld() throws java.rmi.RemoteException;
}
//////////////////////////////////////////////
//////////test.jsp//////////////////////////
<!--Generated by Weblogic Workshop-->
<%@ page language="java" contentType="text/html;charset=UTF-8"%>

<%@ page import='my.pkg.*'%>
<%@ page import='javax.naming.InitialContext'%>
<%@ page import='javax.naming.*' %>
<%@ page import='javax.rmi.PortableRemoteObject' %>
<%@ taglib uri="netui-tags-databinding.tld" prefix="netui-data"%>
<%@ taglib uri="netui-tags-html.tld" prefix="netui"%>
<%@ taglib uri="netui-tags-template.tld" prefix="netui-template"%>
<html>
<head>
<title>
Web Application Page
</title>
</head>
<body>
<%
try
{

InitialContext ctx = new InitialContext();
Object obj = ctx.lookup("HelloWorldBean.Hellor");
HelloWorldRemoteHome home = (HelloWorldRemoteHome)PortableRemoteObject.narrow(obj,HelloWorldRemoteHome.class);
HelloWorldRemote library = home.create();
library.helloWorld();

}
catch(javax.naming.NamingException ne)
{
System.out.println("Naming exception "+ne);
}

%>
New Web Application Page
</body>
</html>
///////////////////////////////////////////
 
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