HOW TO: "Hello World" EJB Style

Question

The following Session EJB quick tutorial requires an IIOP datasource. This EJB should work in Oracle databases
greater than 8.1.5.
1. Create a new project for an Enterprise JavaBean.
2. Name your project "Hello".
3. Select Enterprise JavaBean from "A project containing a new..."
4. Click Finish to close the Project wizard.
The Enterprise JavaBeans wizard opens.
5. For the EJB type, select Session Bean (Stateless)
6. For the EJB name, enter "Hello" (no quotes!)
The resulting interface names are created for you. Don't change them!
7. Click Finish for the EJB wizard to generate the EJB project for you.
8. Select Save All from the File menu. Call this workspace "Hello".
You'll see that the EJB wizard generated the home, remote, and bean logic files for you. Now you'll need to
add the business logic to the HelloBean.java file.
9. Double click the HelloBean.java file, then click the Source tab to bring it into view.
10. Before the last closing brace (}), add this line of code:
public String hello() { return "Hello World!"; }
11. Select File | Save All.
12. In the Navigator, double-click the Hello.java file so that you can add the remote interface.
13. Click the Source tab to bring Hello.java into view.
14. Add the following line before the last brace (}):
public String hello() throws java.rmi.RemoteException;
15. Select File | Save All.
16. Add the Oracle8i JVM classes to the Hello project by selecting Project | Project Properties and clicking
the Libraries tab.
17. Click Add, then click Oracle 8i JVM, then click OK.
18. Click OK to dismiss the Project Properties dialog.
19. Select Project | Make Project to compile the Hello project.
20. In the Navigator, right-click the Hello folder and select Create EJB/8i Deployment Profile.
21. In the Deployment Profile Wizard that appears, click the Advanced Button.
Only the first (Automatically include files added to project) and the last (Redirect messages
to the Message View) boxes should be selected.
22. Click Done to close the Advanced dialog.
23. Click the Connection tab and select an IIOP datasource. If there is none, you'll have to create one.
All three checkboxes at the top of the page should be selected.
24. Click Done. You'll be prompted to deploy now or later. Click Yes.
JDeveloper will use the IIOP datasource you specified to deploy the Hello EJB project.
Now you need to add the generated files that were created during deployment to the class path so that
the client can find them.
25. From the Project menu, select Project Properties, then click Add, then click New.
26. Click the Elipses to the right of the Class path field, then click Add Jar/Zip.
27. Navigate to the file called HelloGenerated.jar and double-click it to add it to the path.
28. Click OK to close the two dialogs and Project Properties.
After JDeveloper completes the deployment, you need to make a client to call the EJB methods and display the results.
29. From the File menu, select New, then click on the Snippets tab.
30. Double-click the EJB Oracle 8i Client icon.
31. Click the Parameters button in the Snippet dialog.
32. Enter the IIOP connection information you specified earlier.
33. Enter the EJB Home and Remote interface names ("HelloHome" and "Hello").
34. Click OK to close the Parameters button.
The Client file is added to the project.
35. In the Navigator, right-click the MyEJBJSClient.java file and select run.
Check the Message View to see the output of your EJB!
null

Answer 1

I got the msg when I try to deployment EJB and I use the 8.1.7. andJdev 3.2. Please advise what is wrong for my IIOP connection. From the listener.log, the connection looks good.
======================================
Compiling the project...done
Validating the profile...done
Initializing deployment...done
Scanning project files...done
Generating classpath dependencies...done
Generating archive entries table...done
*** Archive generation completed ***
*** Deploying the EJB to 8i JVM ***
EJB deployment argument list:
"C:\Program Files\Oracle\JDeveloper 3.2\java1.2\jre\bin\javaw"
"-DPATH=C:\Program Files\Oracle\JDeveloper 3.2\bin;C:\Program Files\Oracle\JDeveloper 3.2\java1.2\bin"
-classpath
"C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\aurora_client.jar;C:\Program Files\Oracle\JDeveloper 3.2\lib\javax-ssl-1_2.jar;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\jasper.zip;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\vbjorb.jar;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\vbjapp.jar;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\vbjtools.jar;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\vbj30ssl.jar;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\aurora.zip;C:\Program Files\Oracle\JDeveloper 3.2\sqlj\lib\translator.zip;C:\Program Files\Oracle\JDeveloper 3.2\sqlj\lib\runtime.zip;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\mts.jar;C:\Program Files\Oracle\JDeveloper 3.2\myclasses;C:\Program Files\Oracle\JDeveloper 3.2\lib\jdev-rt.zip;C:\Program Files\Oracle\JDeveloper 3.2\jdbc\lib\oracle8.1.7\classes12.zip;C:\Program Files\Oracle\JDeveloper 3.2\lib\connectionmanager.zip;C:\Program Files\Oracle\JDeveloper 3.2\lib\javax_ejb.zip;C:\Program Files\Oracle\JDeveloper 3.2\auro
a\lib\aurora_client.jar;C:\Program Files\Oracle\JDeveloper 3.2\lib\javax-ssl-1_2.jar;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\jasper.zip;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\vbjorb.jar;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\vbjapp.jar;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\vbjtools.jar;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\vbj30ssl.jar;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\aurora.zip;C:\Program Files\Oracle\JDeveloper 3.2\sqlj\lib\translator.zip;C:\Program Files\Oracle\JDeveloper 3.2\sqlj\lib\runtime.zip;C:\Program Files\Oracle\JDeveloper 3.2\aurora\lib\mts.jar;C:\Program Files\Oracle\JDeveloper 3.2\java1.2\jre\lib\rt.jar;C:\Program Files\Oracle\JDeveloper 3.2\lib\xmlparserv2.jar"
oracle.aurora.ejb.deployment.GenerateEjb
-u
scott
-p
tiger
-s
sess_iiop://localhost:2482:test
-republish
-keep
-temp
TEMP
-descriptor
"C:\Program Files\Oracle\JDeveloper 3.2\myprojects\Demo\EJB\DemoHelloEJB.xml"
-oracledescriptor
C:\Program Files\Oracle\JDeveloper 3.2\myprojects\Demo\EJB\DemoHelloEJB_oracle.xml
-generated
"C:\Program Files\Oracle\JDeveloper 3.2\myprojects\Demo\EJB\DemoHelloEJBGenerated.jar"
"C:\Program Files\Oracle\JDeveloper 3.2\myprojects\Demo\EJB\DemoHelloEJBSource.jar"
Cannot connect to service: sess_iiop://localhost:2482:test
*** Errors occurred while deploying the EJB to 8i JVM ***
*** Deployment completed ***
============================================