[Solved] Propagating users from ADF App to DB for VPD, Attn Frank

Question

Hi all,
I've implemented VPD using policies and application contexts on my application. Now I want to propagate the logged in user from the application to the DB in order to apply VPD policies on it. I've used container managed security using DB tables as described in Frank's article.
I know that I must override prepareSession method of the application module for doing this but I don't know the exact procedure.
My VPD function is:
function empPolicy( object_schema varchar2, object_name varchar2 ) return varchar2 is
begin
return
'empno = SYS_CONTEXT(''USER_SECURITY'', ''EMPNO'' )'
end;
and my context setting procedure is called SetSecurity.
I also have a logon trigger which calls SetSecurity to set the context upon each user's logon.
Thanks in advance,
S/\EE|)

Answer 1

Saeed,
have a look
http://www.oracle.com/technology/products/jdev/howtos/bc4j/bc4jvpdjaas.html
String getApplicationUserName()
   String appUserName = getUserPrincipalName();
   return appUserName;
protected void prepareSession (Session _session)
   super.prepareSession(_session);
   String appContext = "Begin exprep_ctx.set_ctx_appuser('"+getApplicationUserName()+"'); END;";
   java.sql.CallableStatement st= null;
   try
      st = getDBTransaction().createCallableStatement(appContext,0);
      st.execute();
   } catch (java.sql.SQLException s)
      throw new oracle.jbo.JboException(s);
   }  finally
      try
     if (st!= null)
         st.close();
   } catch (java.sql.SQLException s2)
}Frank