java.lang.ClassCastException:While Lookup
Hi Everybody,
I'am creating a example where my .ear file contains the following structure,
1.A war file(for login page anf dashboard)
2.A .par file(including 1 stateless and 3 entity bean and a persistence.xml)
my example works excellent when i run it from a standalone client from eclipse.but when I try to access it from the web client it produces following error.
Exception in Helper.lookup() java.lang.ClassCastException: cannot assign
instance of org.jboss.proxy.ejb.EJBMetaDataImpl to field org.jboss.ejb3.session.BaseSessionRemotePr
oxy.ejbMetaData of type javax.ejb.EJBMetaData in instance of org.jboss.ejb3.stateless.StatelessRemot
eProxy
My Code is as following
/** HELPER CLASS ***/
import java.util.Properties;
import javax.naming.InitialContext;
import javax.naming.NamingException;
public class Helper {
/**
* RETURN INITIAL CONTEXT FOR THE JNDI LOOKUP.
* @return
*/
private InitialContext getInitialContext(){
InitialContext ctx=null;
Properties env = new Properties();
env.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
env.put("java.naming.provider.url", "jnp://nsg-sd36:1099");
env.put("java.naming.factory.url.pkgs","org.jboss.naming:org.jnp.interfaces");
try{
ctx = new InitialContext(env);
}catch(NamingException n){
System.out.println("Naming Exception "+n);
}
System.out.println(" Returning Initial Context "+ctx+" From Helper.getInitialContext()");
return ctx;
}
public Object lookup(String JNDIName){
System.out.println("Inside Lookup "+JNDIName);
Object obj=null;
try {
InitialContext ctx = (InitialContext)getInitialContext();
System.out.println(" 1. "+ctx);
obj = ctx.lookup(JNDIName);
}catch(Exception e){
System.out.println("Exception in Helper.lookup() "+e);
}
System.out.println("Returning "+obj+" From Helper.lookup()");
return obj;
}
}
/*** CLIENT CODE ***/
public boolean validateUser(String userName,String password){
System.out.println("5.Inside LoginAction.validateUser()");
System.out.println("6.VALUE RECEIVED IN VALIDATE-USER USER-NAME ="+userName+" AND PASSWORD = "+password);
boolean flag=false;
ApplicationUser applicationUser=null;
Helper helper = new Helper();
applicationUser=(ApplicationUser)helper.lookup(ApplicationUser.class.getName());
try{
flag = applicationUser.login(userName,password);
}catch(Exception e){
System.out.println("Exception occured"+e);
}
System.out.println("7.VALUE BEING RETURNED FROM VALIDATE-USER = "+flag);
return flag;
}
/*** BEAN CODE ****/
public boolean login(String userName, String password) {
boolean retval=false;
java.util.List list = manager.createQuery("select count(user)from User user where user.userName = '"+userName+"' and user.password = '"+password+"' ").getResultList();
if(list!=null && list.get(0)!=null&& list.get(0).equals("")){
System.out.println("ApplicationUserBean.login value received from query = "+list.get(0));
if(list.get(0).equals("0"))
retval= false;
else
retval= true;
}
return retval;
}
Thanks in anticipation,
Vijaypal Singh