Hi, i am learning to use EJB and i have some problems. I tried some examples
but i can execute. Always i get the same error.
I am using Jboss 4.0.2 with Window XP.
My ejb-jar.xml is:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC
"-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN"
"http://java.sun.com/dtd/ejb-jar_2_0.dtd";>
<ejb-jar>
Calculo de Intereses
<display-name>Calculo</display-name>
<enterprise-beans>
<ejb-name>InteresesBean</ejb-name>
com.osmosislatina.ejb.intereses.InteresesHome
com.osmosislatina.ejb.intereses.Intereses
<ejb-class>com.osmosislatina.ejb.intereses.InteresesBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Bean</transaction-type>
</enterprise-beans>
</ejb-jar>
And my clases are:
**********************
package com.osmosislatina.ejb.intereses;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
public class InteresesBean implements SessionBean {
public double calcularInteres(double capital, double tasa, double plazo) {
return capital * Math.pow(1+tasa, plazo) - capital;
}
public InteresesBean() {}
public void ejbCreate() {}
public void ejbRemove() {}
public void ejbPassivate() {}
public void ejbActivate() {}
public void setSessionContext(SessionContext sc) {}
}
**********************
package com.osmosislatina.ejb.intereses;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
public interface Intereses extends EJBObject {
public double calcularInteres(double capital, double tasa, double plazo)
throws RemoteException;
}
**********************
package com.osmosislatina.ejb.intereses;
import javax.ejb.EJBHome;
import javax.ejb.CreateException;
import java.rmi.RemoteException;
public interface InteresesHome extends EJBHome {
Intereses create() throws RemoteException, CreateException;
}
**********************
and the client is:
package com.osmosislatina.ejb.intereses;
import java.util.Properties;
import javax.rmi.PortableRemoteObject;
import javax.naming.*;
class ClienteIntereses
{
public static void main(String[] args)
{
Properties env = new Properties();
System.out.println("Inicio\n");
// Definir las propiededas y ubicación de búsqueda de Nombres JNDI.
env.setProperty("java.naming.factory.initial",
"org.jnp.interfaces.NamingContextFactory");
env.setProperty("java.naming.provider.url", "jnp://localhost:1099");
env.setProperty("java.naming.factory.url.pkgs",
"org.jboss.naming.client");
env.setProperty("j2ee.clientName","ClienteIntereses");
//env.put(Context.INITIAL_CONTEXT_FACTORY,
"org.openejb.client.LocalInitialContextFactory");
try
{
// Traer el Contexto de Nombre
InitialContext jndiContext = new InitialContext(env);
System.out.println("Contexto Disponible");
Object ref = jndiContext.lookup("InteresesBean");//THE PROBLEM IS HERE
InteresesHome home = (InteresesHome) PortableRemoteObject.narrow
(ref, InteresesHome.class);
Intereses interes = home.create();
System.out.println("Interés de 10,000 Capital, a tasa 10%, bajo 2
plazos anuales:");
System.out.println("Fin");
}
catch(Exception e)
{
System.out.println("Error\n");
System.out.println(e.getMessage());
e.printStackTrace();
}
}
}
The error is in the line:
Object ref = jndiContext.lookup("InteresesBean");//THE PROBLEM IS HERE
I don't know what is the problem because i didn't write the program and another
persons can execute without problems.
Can anybody help me, please?
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