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Netbeans 6.8 AsyncRequest sample error  

2009-12-21 17:53:28|  分类: java |  标签: |举报 |字号 订阅

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  Errors existed in  AjaxCometServlet.java

 httpservlet method: get 

The following code works fine :

@Override
    protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        res.setContentType("text/html");
        res.setHeader("Cache-Control", "private");
        res.setHeader("Pragma", "no-cache");

        PrintWriter writer = res.getWriter();
        // for IE
        writer.println("<!-- Comet is a programming technique that enables web servers to send data to the client without having any need for the client to request it. -->\n");
        writer.flush();

        final AsyncContext ac = req.startAsync();
        ac.setTimeout(10  * 60 * 1000);
        ac.addListener(new AsyncListener() {
            public void onComplete(AsyncEvent event) throws IOException {
                queue.remove(ac);
            }

            public void onTimeout(AsyncEvent event) throws IOException {
                queue.remove(ac);
            }

            public void onError(AsyncEvent event) throws IOException {
                queue.remove(ac);
            }

            public void onStartAsync(AsyncEvent event) throws IOException {
            }
        });
        queue.add(ac);

    }

 

Netbeans generated code is:   // can't work

 @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        res.setContentType("text/html");
        res.setHeader("Cache-Control", "private");
        res.setHeader("Pragma", "no-cache");
       
        PrintWriter writer = res.getWriter();
        // for IE
        writer.println("<!-- Comet is a programming technique that enables web servers to send data to the client without having any need for the client to request it. -->\n");
        writer.flush();

        req.setAsyncTimeout(10 * 60 * 1000);
        final AsyncContext ac = req.startAsync();
        queue.add(ac);
        req.addAsyncListener(new AsyncListener() {
            public void onComplete(AsyncEvent event) throws IOException {
                queue.remove(ac);
            }

            public void onTimeout(AsyncEvent event) throws IOException {
                queue.remove(ac);
            }

            public void onError(AsyncEvent arg0) throws IOException {
            }
        });

    }

 

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