java.lang.ClassNotFoundException: com.HelloWorldBeanRemote

[micum]

Hola!

Estoy tratando de hacer un HelloWorld con ejb 3. version de jboss 7.1

tengo el ejb de la siguiente manera:

el nombre del proyecto es HolaMundoEjb

//---------------------------------------------------------

package com;

import javax.ejb.Remote;

@Remote

public interface HelloWorldBeanRemote {

    public String getHelloWorld();

}

//-------------------------------------------------------

package com;

import javax.ejb.LocalBean;

import javax.ejb.Stateless;

@Stateless

@LocalBean

public class HelloWorldBean implements HelloWorldBeanRemote {

      public String getHelloWorld(){

          return "Hola EJB 3.0";

    }

}

Cuando implemento el ejb, en la consola del servidor me da la siguiente información:

10:50:07,673 INFO  [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-1) JNDI bindings for session bean named HelloWorldBean in deployment unit deployment "HolaMundoEjb.jar" are as follows:

          java:global/HolaMundoEjb/HelloWorldBean!com.HelloWorldBean

          java:app/HolaMundoEjb/HelloWorldBean!com.HelloWorldBean

          java:module/HelloWorldBean!com.HelloWorldBean

          java:global/HolaMundoEjb/HelloWorldBean!com.HelloWorldBeanRemote

          java:app/HolaMundoEjb/HelloWorldBean!com.HelloWorldBeanRemote

          java:module/HelloWorldBean!com.HelloWorldBeanRemote

          java:jboss/exported/HolaMundoEjb/HelloWorldBean!com.HelloWorldBeanRemote

En mi cliente tengo un servlet que tiene el siguiente codigo para acceder al ejb:

37|     HelloWorldBeanRemote hello = null ;

43|     try{

44|             Context initial = new InitialContext();

45|             hello = (HelloWorldBeanRemote)initial.lookup("ejb:HolaMundoEjb/HelloWorldBean!com.HelloWorldBeanRemote");

47|     }catch(Exception NamingException){

48|             NamingException.printStackTrace();

49|     }

53|     String var = hello.getHelloWorld() ;

Cuando ejecuto el servlet obtengo el siguiente error :

javax.servlet.ServletException: La ejecución del Servlet lanzó una excepción

causa raíz

java.lang.NoClassDefFoundError: com/HelloWorldBeanRemote
     Saludo.HelloWorld.doGet(HelloWorld.java:45)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:847)

causa raíz

java.lang.ClassNotFoundException: com.HelloWorldBeanRemote from [Module "deployment.WebPrueba.war:main" from Service Module Loader]
     org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)
     org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:468)
     org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:456)
     org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
     org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:120)
     Saludo.HelloWorld.doGet(HelloWorld.java:45)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:847)

No se si me estoy equivocando con el jndi en el lookup. No se cual debo tomar.

[jaikiran]

Where is the class com.HelloWorldBeanRemote located in the war?

[micum]

Thanks for responding.

Nowhere, only import

import com.HelloWorldBeanRemote;

But the error only occurs at runtime

[jaikiran]

I meant, where is that class packaged within that war? If it isn't packaged then you obviously will run into the ClassNotFoundException.

[micum]

I'm using eclipse and the EJB is in a project outside of the client, I read a tutorial that said you had to reference it as follows:

Right-click the client project -> Build Path -> Configure Build Path -> Tab Project -> Add:

I choose the ejb project.

[jaikiran]

I've zero knowledge when it comes to IDEs and application deployment/configurations - I never use IDEs for that. Maybe someone with more experience with that will be able to help.

[micum]

No problem. Could you give me an explanation of how to do it without an IDE?

[jaikiran]

Typically, if you are deploying an .ear then the bean interfaces go in some jar within the .ear/lib folder and the bean implementation class(es) go in a separate jar placed at the root of the .ear. The war (which most of the times is a client to the beans) can then have access to the bean interfaces since those are now available to all the components of the .ear (since that jar is in .ear/lib).

If you are deploying a standalone war (i.e. a top level war) then the bean interfaces and even bean implementation classes can all be packaged in the .war itself, either in the WEB-INF/classes folder or as a separate jar in the WEB-INF/lib folder.

[micum]

Thank you. I'll try your method and then posting the results.