/**
     * Call this method to initiate the download.
     */
    public void initiate(AjaxRequestTarget target) {
        String url = getCallbackUrl().toString();
        if (addAntiCache) {
            url = url + (url.contains("?") ? "&" : "?");
            url = url + "antiCache=" + System.currentTimeMillis();
        }
        target.appendJavaScript("window.location.href='" + url + "'");
//        target.appendJavaScript("window.setTimeout(\"window.location.href=''\", 30000);");
        //target.appendJavaScript("window.setTimeout(\"window.location.href='" + url + "'\", 10000);");
    }

    public void onRequest() {
        try {
            getComponent().getRequestCycle().scheduleRequestHandlerAfterCurrent(new ResourceStreamRequestHandler(getResourceStream(), getFileName()));
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

final AJAXDownload pdfDownload = new AJAXDownload(DownloadResource.JOB_EXTRACT_SINGLE_DATA, job)
        {
            private static final long serialVersionUID = 1L;

            @Override
            protected String getRenderType() {
                return "pdf";
            }

            @Override
            protected int getRowNumber() {
                return 1;
            }
        };
        jobForm.add(pdfDownload);
        AjaxLink<Object> pdfLink;
        jobForm.add(pdfLink = (AjaxLink<Object>) new AjaxLink<Object>("downloadPdfLink")
        {
            /**
             * 
             */
            private static final long serialVersionUID = 1L;

            @Override
            public void onClick(final AjaxRequestTarget target) {
               download.initiate(target);
            };
               
            }