InitialContextFactory

Question

Hi,
I have a Weblogic Server 6.1 SP1 on a SunOS Machin, and I test the StatelessSession EJB, but the client doesn t work on the client machin
I test on a NT client machin, and I have this exception.
/////////Code
Context ctx = null ;
Properties h = new Properties();
h.put(Context.PROVIDER_URL, url);
h.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
try {
     ctx = new InitialContext(h);
catch(Exception e)
     e.printStackTrace() ;
Object objRef = ctx.lookup(JNDI_NAME);
TraderHome home = (TraderHome) narrow(objRef, TraderHome.class);
//////////Exception
javax.naming.NoInitialContextException: Cannot instantiate class: weblogic.jndi.WLInitialContextFactory. Root exception is java.lang.ClassNotFoundException: weblogic.jndi.WLInitialContextFactory
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.sun.naming.internal.VersionHelper12.loadClass(Unknown Source)
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.init(Unknown Source)
at javax.naming.InitialContext.<init>(Unknown Source)
at examples.ejb.basic.statelessSession.Client.bigFunction(Client.java:351)
at examples.ejb.basic.statelessSession.Client.<init>(Client.java:58)
at examples.ejb.basic.statelessSession.Client.main(Client.java:90)
Is it necessary to copy the weblogic.jar on the client machin ?
If it exists another way to execute the client, could U help me ?
Thanks.

Answer 1

the WLInitialContextFactory class should be in your classpath, in other words the jar file should be in the classpath of the machine running the code that references this class. it is best to put that code into a class on the server and have the client make a call to this class. typically a generic factory type of class.
here's some psuedocode to do this:
public class EJBFactory {
     /** constructor made private to prevent instantiation */
     private EJBFactory() {}
     public static void findEJBHome(String sJNDIName) {
          // get the intitial context by calling the method below
          // use the initial context & the jndi name passed in
          // look up the bean
          // once the home is obtained the remote can be
          // created by using reflection
     public static InitiaContext getInitialContext() {
          // do the WLInitialContext thing here
          // and return the initial context
}