Need to send message to struts JSP after creating PDF

[Raaja Gotluru]

Hi,

I am creating a PDF by getting images from a list object. If I put return statement its giving exception getOutputStream() has already been called for this response. If I set return null then it wont display message at struts page but pdf will be generated. How to achieve both. ie I want to generate a pdf at the same time a success message should be displayed at the struts jsp.

My code is

ServletOutputStream outStream=null;
			try {
				InputStream is=null; 
				Session jcrSession1 = null;
				ServletContext cntx=getServlet().getServletContext();
				HttpSession session = request.getSession();
				String loginID=(String)session.getAttribute("userId");
				IUserLocation userLocation=new UserLocation();
				Document document=new Document(PageSize.A4,0,0,10,10);
				ByteArrayOutputStream  content= new ByteArrayOutputStream();
				jcrSession1=userLocation.getJcrSession(loginID, cntx);
				List docNamesList = (List) session.getAttribute("docNamesList");
				String savefilename = request.getParameter("savefilename")+".pdf";
				//response.reset();
				 outStream = response.getOutputStream();   

				response.setContentType("application/pdf"); 
				response.setHeader("Content-Disposition","attachment; filename="+savefilename);
				PdfWriter writer = PdfWriter.getInstance(document, outStream);
				writer.setStrictImageSequence(true); 
				document.open();
				for(int i =0; i<docNamesList.size();i++){
					String fileName =((SearchDTO) docNamesList.get(i)).getDocName();
					String folderName =((SearchDTO) docNamesList.get(i)).getFolderName();
					content= userLocation.getFileContent(jcrSession1, folderName, fileName);
					Image convertJpg = Image.getInstance(content.toByteArray());
					
					if(convertJpg.getDpiX()>75 & convertJpg.getDpiY()>75){
						convertJpg.scaleToFit(300, 300);
				    }
					document.add(new Paragraph());
					document.add(convertJpg);
				}
				
				document.close();
				writer.close();
				ActionMessages messages = new ActionMessages();
				messages.add("sts", new ActionMessage("common.generatepdf.success"));
				saveMessages(request, messages);
				} 
				catch (Exception e) {
					messages = new ActionMessages();
					messages.add("sts",new ActionMessage(e.getLocalizedMessage()));
					saveErrors(request, messages);
					return mapping.findForward("failure");
				} 
				finally { 
				      if(outStream != null)
						try {
							outStream.close();
							outStream.flush();
							outStream=null;
						      } catch (IOException e) {
							e.printStackTrace();
						}
				}  
			//return mapping.findForward("success");
				return null;
		}

[rashi pawar]

i want to do login page so that whenever user enters wrong username/password 3 times system will not allow to enter username/password. i am using struts.
kindly help me.