Unable to run External Java activity getting Null pointerException

Question

Hi All,
Im unable to run external java activity in my workflow on Solaris environment.
My workflow looks like:
start -----> External java activity----> end
External java activity code :
exceute(WFContext ctx) {
System.out.print("im in java activity");//Only this stmt is present in my code
1) I have set the classpath in the environment variables pointing all the workflow jars.
2) Executed wfjvlsnr.csh and it displays the following.
Oracle Workflow 2.6.4.0.0 JAVA Function Activity Agent
Please Enter Database Password : r4v25zx
Connected to owf_mgr@wfSystem:1667:WFUser with character set UTF8
Listening...
Till here it is fine.workflow agent started listening
3) Now i started my client program which triggers the workflow and reaches java activity.
4) Now when i verify console (2) where i run the java activity agent it displays the following errors:
oradev_WFUser> ./wfjvlsnr.csh
Oracle Workflow 2.6.4.0.0 JAVA Function Activity Agent
Please Enter Database Password : owfpswd
Connected to owf_mgr@wfSystem:1667:WFUser with character set UTF8
Listening...
Sat Jun 02 12:18:47 EST 2007 Executing EXTERNAL/002 oracle.apps.fnd.wf.internal
java.lang.NullPointerException
null
Sat Jun 02 12:18:47 EST 2007 Enqueuing EXTERNAL/002 oracle.apps.fnd.wf.internal null
Error executing class oracle.apps.fnd.wf.internal: null
Sat Jun 02 12:18:47 EST 2007 Executing EXTERNAL/002 oracle.apps.fnd.wf.internal
java.lang.NullPointerException
null
Sat Jun 02 12:18:47 EST 2007 Enqueuing EXTERNAL/002 oracle.apps.fnd.wf.internal null
Error executing class oracle.apps.fnd.wf.internal: null
Though i dont have any code in my java activity it says NULL pointer exception.
Im unable find where the mistake is.
Please help me out in running my java activity.
Thanks in Advance,
Cheers,
Sharath

Answer 1

Hi,
I am using integrated web logic server. Do I have to create JDBC connection in Integrated Weblogic Server? If yes, then how come it was working earlier and stopped working suddenly.
Just to try out, I have created JDBC with a name soademo (As mentioned in bc4j.xml) in Integrated Weblogic Server but didn't worked.
I will send you sample java class for your reference.
public class TestClient {
    public static void main(String[] args) {
        String amDef = "com.moj.model.AM.AppModule";
        String config = "AppModuleLocal";
        ApplicationModule am =
            Configuration.createRootApplicationModule(amDef, config);
        ViewObject emplist = am.findViewObject("EmployeesView1");
        emplist.setWhereClause("first_name = :p_firstname");
        emplist.defineNamedWhereClauseParam("p_firstname", null, null);
        emplist.setNamedWhereClauseParam("p_firstname", "Smith");
        emplist.executeQuery();
        while (emplist.hasNext()) {
            Row emp = emplist.next();
            System.out.println ("emp " + emp.getAttribute("Empno"));
            System.out.println("First Name " + emp.getAttribute("FirstName"));
            System.out.println("Last Name " + emp.getAttribute("LastName"));
        Configuration.releaseRootApplicationModule(am, true);
Appreciate if you can provide me in more detail as I have started working on very recently.
Parvez