res.close ();
    public ResponseTrans execute (RequestTrans req) {	requestCount += 1;	User u = getUser (req.session);	ResponseTrans res = null;	RequestEvaluator ev = null;	try {	    ev = getEvaluator ();	    res = ev.invoke (req, u);	} catch (ApplicationStoppedException stopped) {	    // let the servlet know that this application has gone to heaven	    throw stopped;	} catch (Exception x) {	    errorCount += 1;	    res = new ResponseTrans ();	    res.write ("Error in application: <b>" + x.getMessage () + "</b>");	} finally {	    releaseEvaluator (ev);	}	res.close ();  // this needs to be done before sending it back	return res;    }