How to display which exception Is Raised?

Question

Hi
Experts.
I am trying to connect my webDynpro with oracle.
I had already included Jar at both places.
now I want to display in exception that which error is coming?
I had already written <b> ex.printStackTrace();  </b>
but it is not working.
Code Is given Below.
Connection conn=null;
          try
          wdComponentAPI.getMessageManager().reportException("after 0",false);
          Class.forName("oracle.jdbc.driver.OracleDriver");
          wdComponentAPI.getMessageManager().reportException("after 1st",false);
          DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
          wdComponentAPI.getMessageManager().reportException("after 2nd",false);
          conn =DriverManager.getConnection ("jdbc:oracle:thin:@Server IP:1521:adaniinframs","scott", "tiger");
          wdComponentAPI.getMessageManager().reportException("after 3",false);
          Statement stmt=conn.createStatement();
          wdComponentAPI.getMessageManager().reportException("after 4",false);
          ResultSet rs=stmt.executeQuery("select ename from emp where empno=7369"); // select statment
          wdComponentAPI.getMessageManager().reportException("after 5",false);
          while(rs.next())
          wdComponentAPI.getMessageManager().reportException("after 6",false);
          IPrivateDatabaseConnectView.INodeEmpElement a = wdContext.createNodeEmpElement();
          a.setEmpName(rs.getString(1));
          a.setEmpJob(rs.getString(2));
          wdContext.nodeNodeEmp().addElement(a);
          catch(Exception ex)
                ex.printStackTrace();
          finally
           try
          conn.close(); // closing the connection
          catch(Exception e)
          ex.printStackTrace();
Regards
Sunny.

Answer 1

I don't think the user may see anything if you execute e.printStackTrace(); so what you have to do is report an exception with the text of the stack trace:
IWDMessageManager manager = wdComponentApi().getMessageManager();
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
e.printStackTrace(pw);
String message = sw.toString();
manager.reportException("Excepcition raised: " + message, false);
With this you will report the whole stack trace. If you want to get only the cause you will have to parse the message string. e.getMessage() should do this for you but if doesn't return anything quite often.