How to run EJB Client, please help
Hi,
I am following the "jboss 3 step by step.pdf" to try an jboss + ejb example, but I can't run the HelloWorldClient.java. I got the following errors:
Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorldClient (wro
ng name: com/mastertech/sample/HelloWorldClient)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)
at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
Here is the code:
HelloWorldClient.java
==========================================
package com.mastertech.sample;
import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Hashtable;
public class HelloWorldClient
{
public static void main( String [] args )
{
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
env.put(Context.PROVIDER_URL, "localhost:1099");
env.put("java.naming.factory.url.pkgs",
"org.jboss.naming:org.jnp.interfaces");
try
{
Context ctx = new InitialContext(env);
Object obj = ctx.lookup( "HelloWorld" );
HelloWorldHome home =
(HelloWorldHome)javax.rmi.PortableRemoteObject.narrow(
obj, HelloWorldHome.class );
HelloWorld helloWorld = home.create();
System.out.println( helloWorld.hello());
helloWorld.remove();
}
catch ( Exception e )
{
e.printStackTrace();
System.out.println( "Exception: " + e.getMessage() );
}
}
}
HelloWorldHome.java
===============================
package com.mastertech.sample;
/**
* HelloWorldHome provides the container the means to
* create and destroy EJB's.
*/
public interface HelloWorldHome extends javax.ejb.EJBHome
{
HelloWorld create() throws java.rmi.RemoteException,
javax.ejb.CreateException;
}
HelloWorld.java
==================================
package com.mastertech.sample;
/**
* This is the remote interface that the client calls to
* have the EJB do the work.
*/
public interface HelloWorld extends javax.ejb.EJBObject
{
public String hello() throws java.rmi.RemoteException;
}
HelloWorldBean.java
==================================
package com.mastertech.sample;
import javax.ejb.SessionContext;
/**
* This class is the actual implementation of the business
* logic. This is the EJB for simplicity's sake.
*/
public class HelloWorldBean implements javax.ejb.SessionBean
{
private SessionContext ctx;
public void setSessionContext(SessionContext ctx)
{
this.ctx = ctx;
}
public void ejbRemove()
{
System.out.println( "ejbRemove()" );
}
public void ejbActivate()
{
System.out.println( "ejbActivate()" );
}
public void ejbPassivate()
{
System.out.println( "ejbPassivate()" ) ;
}
/**
* The method called to display the string "Hello World!"
* on the client.
*/
public String hello()
{
System.out.println( "hello()" );
return "Hello World!";
}
}
ejb-jar.xml
===========================================
<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar>
JBoss Hello World Application
<display-name>Hello World EJB</display-name>
<enterprise-beans>
<ejb-name>Hello</ejb-name>
com.mastertech.sample.HelloWorldHome
com.mastertech.sample.HelloWorld
<ejb-class>com.mastertech.sample.HelloWorldBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Bean</transaction-type>
</enterprise-beans>
</ejb-jar>
===================================================
What is the problem? CLASSPATH? I have tried to include many jar files in it, but still fialed.
Please help.
Many Thanks,
Michael
