JNDI name: DataSource for JDBC Lookup issue under Weblogic Appln Server "java:comp/env/jdbc/MY_SQL_DS" or "MY_SQL_DS"???

protected Connection getConnection() {
        try {
            if (connection == null || connection.isClosed()) {
                if (dataSource == null) {
                    // impliziter Initial Context von WebLogic ApplicationServer Environment
                    java.util.Hashtable environment = new java.util.Hashtable();
                    environment.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
                    Context wlsic = new InitialContext(environment);
                    showJndiContext( wlsic, "", "");
                    
                    // logischer JNDI Rootcontext der Serverkomponente, kann mehrfach verwendet werden
                    Context ctx = (Context) wlsic.lookup("java:comp/env"); 
                    showJndiContext( ctx, "", "");
                    
                    // weiter mit Resourcenpfad
                    dataSource = (DataSource) ctx.lookup("MY_SQL_DS");
                }
                connection = dataSource.getConnection();
            }
        }
        catch (NamingException ne) {
            ne.printStackTrace();
            log.error(ne);
        }
        catch (SQLException sqlEx) {
            sqlEx.printStackTrace();
            log.error(sqlEx.getMessage());
        }
        return connection;
    }
 
    public static void showJndiContext(Context ctx, String name, String space) {
        if (null == name)
            name = "";
        if (null == space)
            space = "";
 
        try {
            NamingEnumeration en = ctx.list(name);
            while (en.hasMoreElements()) {
                String delim = (null != name && 0 < name.length()) ? "/" : "";
                NameClassPair nc = (NameClassPair) en.next();
                System.out.println(space + name + delim + nc);
                if (40 > space.length())
                    showJndiContext(ctx, nc.getName(), "    " + space);
            }
        }
        catch (javax.naming.NamingException ex) {
            //System.out.println( ex );
        }
    }

                                              

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