Help!! - Unable to use the Application Module Deployed as Corba Object in Oracle 8i

Question

I have been able to successfully deploy an Application Module in Oracle 8i but i am un able to get a reference to the Application Module from the database the code used by me is -
package client;
import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Hashtable;
import oracle.jbo.*;
import org.omg.CORBA.*;
public class Corba8IClient{
Hashtable env = new Hashtable();
ApplicationModule appMod = null;
String theAMDefName = "test/jd/freshJBO.FreshJBOModule";
public Corba8IClient() {
System.out.println("Started...");
// Load the Application Module
try{
// Component deployed to Oracle8i CORBA Server.
// Set up the 8i environment
System.out.println("Setting up initial Context...");
env.put(Context.INITIAL_CONTEXT_FACTORY, JboContext.JBO_CONTEXT_FACTORY);
env.put(JboContext.DEPLOY_PLATFORM, JboContext.PLATFORM_ORACLE8I);
env.put(Context.SECURITY_PRINCIPAL, "jd");
env.put(Context.SECURITY_CREDENTIALS, "jd");
env.put(JboContext.HOST_NAME, "Dev51");
env.put(JboContext.CONNECTION_PORT, "2481");
env.put(JboContext.ORACLE_SID, "ORA8I");
// env.put(JboContext.APPLICATION_PATH, "test/jd/");
System.out.println("Getting initial Context.");
Context ic = new InitialContext(env);
System.out.println("Doing Lookup...");
ApplicationModuleHome home = (ApplicationModuleHome)ic.lookup(theAMDefName);
System.out.println("Calling create...");
// home
System.out.println("Home Class Name : "+home.getClass().getName());
oracle.jbo.client.remote.corba.aurora.AuroraApplicationModuleHome am = (oracle.jbo.client.remote.corba.aurora.AuroraApplicationModuleHome)home;
System.out.println("DefName "+am.getDefName());
appMod = home.create();
System.out.println("Setting up connetion from AppMod to database...");
appMod.getTransaction().connect("jdbc:oracle:thin:jd/jd@dev51:1521:ORA8I");
}catch(Exception e) {
e.printStackTrace();
System.out.println("AppMod full Name "+ appMod.getFullName());
public ApplicationModule getAppMod(){
return appMod;
public static void main(String args[]){
Corba8IClient c8c = new Corba8IClient();
after running the output is -
Started...
Setting up initial Context...
Getting initial Context.
Doing Lookup...
Diagnostics: Silencing all diagnostic output (use -Djbo.debugoutput=console to see it)
Calling create...
Home Class Name : oracle.jbo.client.remote.corba.aurora.AuroraApplicationModuleHome
DefName null
oracle.jbo.ApplicationModuleCreateException: JBO-25222: Unable to create application module.
at oracle.jbo.client.remote.corba.CORBAApplicationModuleHomeImpl.create(CORBAApplicationModuleHomeImpl.java:63)
at client.Corba8IClient.<init>(Corba8IClient.java:39)
at client.Corba8IClient.main(Corba8IClient.java:53)
java.lang.NullPointerException
at client.Corba8IClient.<init>(Corba8IClient.java:45)
at client.Corba8IClient.main(Corba8IClient.java:53)
Corba Object is deployed as -
ObjectName = /test/jd/freshJBOModule
Server Class = freshJBO.server.o8.FreshJBOModuleServerO8
Helper Class = oracle.jbo.common.remote.corba.RemoteApplicationModuleHomeHelper
The Application Module conatians an entity object and a view object for Dept Table in schema jd(Username -jd, Password -jd).

Answer 1

Moneesh,
I believe there is a problem with the way you set the variable theAMDefName. It should be:
String theAMDefName = freshJBO.FreshJBOModule";
Then you need to reinstate the line you commented out, to set the application path (but remove the trailing / from the path, as shown):
env.put(JboContext.APPLICATION_PATH, "test/jd");
If that doesn't work, and for future reference, I suggest testing your deployed application module from the Business Component Browser (aka the tester) before trying your hand-coded client. Start the tester, select Oracle8i as the middle tier server type, make sure the other information in the connect window is correct, then click Connect.
Good luck
Blaise