I am working on a web application using the Struts framework. Using a form on a jsp page, I generate a report which is displayed in pdf on a new screen. The report is generated through an Action class method. I would like to display a "Please wait" screen while the report is being generated.
The action class method calls functions that generate a pdf file and then redirects control to that file. So I cannot use the flush() method to send html to the browser while the report is being generated (once a response is committed it cannot be written to again). Neither can I use the 'div' tag method as my new page is not a jsp page (it is a new browser window with pdf file displayed inside it).
My code is shown below....
//the jsp code calling the action
<nested:form action="" target="_blank">
// The Action class
public ActionForward getTransactionReports(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
throws Exception
{
ICustomerAdministrationClient admin_impl = getCustomerAdministrationService(request);
//enforce user permission
enforceFeaturePermissions(EMSConstants.FEATURE_REPORTS, request, 1);
EMSBaseAdminForm admin_form = (EMSBaseAdminForm)form;
ReportsForm reportsForm = admin_form.getReportsForm();
//cant do this as it creates an IllegalStateException
// PrintWriter html = response.getWriter();
//
// html.print("<html>\n<head><title>my test</title></head>\n<body>");
// html.print("<p><img src="">// html.flush();
// html.close();
//if details type is summary then output format can only be PDF
if(reportsForm.getDetailsType().equals(EMSConstants.REPORTS_SUMMARY))
reportsForm.setOutputFormat(EMSConstants.REPORTS_FORMAT_PDF);
//generate the reports using jasper reports
doJasperReports(reportsForm, request);
CustomerForm customer_form = (CustomerForm)getSessionObject(request, "customerForm");
Collection all_region_list_forms = (Collection)getSessionObject(request, "allRegionListForms");
admin_form.setCustomerForm(customer_form);
admin_form.setRegionListForms(all_region_list_forms);
request.setAttribute(EMSConstants.FORM_VIEW, admin_form);
String relativePath = File.separator + "temp_" + request.getSession().getId();
String pdfFilePath = File.separator + "temp" + relativePath + File.separator + "ReportinPDF.pdf";
String csvFilePath = File.separator + "temp" + relativePath + File.separator + "ReportinCSV.dpt";
if(reportsForm.getOutputFormat().equals(EMSConstants.REPORTS_FORMAT_PDF))
return (new ActionForward(pdfFilePath, true));
return (new ActionForward(csvFilePath, true));
}
Any help would be appreciated. Thanks.
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Rizwan Merchant - Software Developer |
