hello


i am working with JSP and EJBs. i have written a simple code for verifying username and password of user by using session beans. my problem is that i am getting the following exception:

"ClassCastException". Exception is as follows:




[exception]



type Exception report



message



description The server encountered an internal error () that prevented it from fulfilling this request.



exception



org.apache.jasper.JasperException

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)

javax.servlet.http.HttpServlet.service(HttpServlet.java:810)

org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)



root cause



java.lang.ClassCastException

com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:293)

javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:134)

org.apache.jsp.Verify_jsp._jspService(org.apache.jsp.Verify_jsp:70)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)

javax.servlet.http.HttpServlet.service(HttpServlet.java:810)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)

javax.servlet.http.HttpServlet.service(HttpServlet.java:810)

org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)



note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.



[/exception]



i have change code a little bit which i m presenting for ur consideration:

			

			

			

			

			VerifyUser.java
			

			

			---------------
			

			

			

			

			package hina.mahmood;
			

			

			import javax.ejb.*;
			

			

			import java.rmi.*;
			

			

			

			

			public interface VerifyUser extends javax.ejb.EJBObject
			

			

			{
			

			

			public Boolean Verify(String user, String pswd) throws RemoteException;
			

			

			}// end interface
			

			

			*****************************
			

			

			

			

			VerifyUserHome.java
			

			

			-------------------
			

			

			

			

			package hina.mahmood;
			

			

			import javax.ejb.*;
			

			

			import java.rmi.*;
			

			

			import javax.ejb.EJBHome;
			

			

			

			

			public interface VerifyUserHome extends javax.ejb.EJBHome
			

			

			{
			

			

			public VerifyUser create() throws RemoteException,CreateException;
			

			

			}// end interface
			

			

			*****************************
			

			

			

			

			VerifyUserBean.java
			

			

			--------------------
			

			

			

			

			package hina.mahmood;
			

			

			import javax.ejb.*;
			

			

			import java.rmi.*;
			

			

			import java.sql.*;
			

			

			import javax.sql.*;
			

			

			import javax.naming.*;
			

			

			

			public class VerifyUserBean implements SessionBean
			

			

			{
			

			

			private SessionContext ctx;
			

			

			public Boolean Verify(String user,String pswd) throws RemoteException
			

			

			{
			

			

			int flag=0;
			

			

			Boolean bool=new Boolean("false");
			

			

			try{
			

			

			InitialContext ctx = new InitialContext();
			

			

			DataSource ds =(DataSource)ctx.lookup("java:honie");
			

			

			Connection con = ds.getConnection();
			

			

			Statement stmt = con.createStatement();
			

			

			String query="Select username,password from hina";
			

			

			ResultSet rs=stmt.executeQuery(query);
			

			

			

			

			while(rs.next())
			

			

			{
			

			

			if((rs.getString("username").equals(user))&&(rs.getString("password").equals(pswd)))
			

			

			{
			

			

			flag=1;
			

			

			break;
			

			

			}
			

			

			}// end while
			

			

			}// end try
			

			

			

			

			catch(Exception e)
			

			

			{System.out.println(e);}
			

			

			

			

			if(flag==0)
			

			

			{
			

			

			bool=new Boolean("false");
			

			

			return bool;
			

			

			}
			

			

			

			

			else
			

			

			if(flag==1)
			

			

			{
			

			

			bool=new Boolean("true");
			

			

			return bool;
			

			

			}
			

			

			

			

			return bool;
			

			

			}// end method
			

			

			

			public void ejbCreate() throws RemoteException,CreateException
			

			

			{
			

			

			}// end method
			

			

			

			

			public void setSessionContext(SessionContext ctx)
			

			

			{
			

			

			this.ctx=ctx;
			

			

			}
			

			

			

			

			public void ejbPassivate()
			

			

			{}
			

			

			

			

			public void ejbActivate()
			

			

			{}
			

			

			

			

			public void ejbRemove()
			

			

			{}
			

			

			

			

			}// end class
			

			

			*******************
			

			

			

			

			ejb-jar.xml
			

			

			--------------
			

			

			

			

			<?xml version="1.0"?>
			

			

			

			

			

			

			

			

			

			

			

			

			

			

			VerifyUser
			

			

			hina.mahmood.VerifyUserHome
			

			

			hina.mahmood.VerifyUser
			

			

			hina.mahmood.VerifyUserBean
			

			

			Stateless
			

			

			Container
			

			

			

			

			

			

			

			

			******************************
			

			

			

			

			Verify.jsp(page that calls this bean)
			

			

			------------------------------------
			

			

			

			

			<%@ page import="java.rmi.*,javax.naming.Context,javax.naming.InitialContext,hina.mahmood.*"%>
			

			

			

			

			<%
			

			

			String username=request.getParameter("user");
			

			

			String password=request.getParameter("pswd");
			

			

			InitialContext cxt=new InitialContext();
			

			

			Object obj=cxt.lookup("VerifyUser");
			

			

			VerifyUserHome userHome=(VerifyUserHome)javax.rmi.PortableRemoteObject.narrow(obj,VerifyUserHome.class);
			

			

			VerifyUser vs=userHome.create();
			

			

			Boolean b=vs.Verify(username,password);
			

			

			boolean bool=b.booleanValue();
			

			

			

			if(bool)
			

			

			response.sendRedirect("main.jsp");
			

			

			

			else
			

			

			response.sendRedirect("error.jsp");
			

			

			

			

			%>
			

			

			***********************
			

			

			

			

			msaccess-ds.xml
			

			

			---------------
			

			

			

			

			

			

			

			

			honie
			

			

			
			

			

			jdbc:odbc:honie
			

			

			sun.jdbc.odbc.JdbcOdbcDriver
			

			

			

			

			

			

			

			

			

			

			

			

			*********************
			

			

			

			

		

i dont know, what mistake i m doing.:(

do i need to set any class path or anything else?
currently i have set my class path to j2ee.jar, my other servlet that do not involve ejbs are working perfectly.



my directory structue is as follows:



hm.war-> WEB-INF(folder) & Verify.jsp



WEBINF->classes(folder) & web.xml
classes->hina(folder)->mahmood(folder)-> VerifyUser.class & VerifyUserBean.class & VerifyUserHome.class




my beans.jar contains:



beans.jar->msaccess-ds.xml & META-INF & and package hina(folder)->mahmood(folder)->VerifyUser.class & VerifyUserBean.class & VerifyUserHome.class
META-INF->ejb-jar.xml





plz plz plz help me. its really very important 4 me.

thanks



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