John,
Thanks for the reply. I try making the Driver at method level and see what
would be the out come. I also made the log level to fatal, I set it to
warning level, it may through out some more info.
Thanks,
Subbareddy.
----- Original Message -----
From: "John Austin" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, January 27, 2004 3:13 PM
Subject: Re: FOPException: FOP processor fails during load test
> On Tue, 2004-01-27 at 16:14, Subbareddy Kalakota wrote:
>
> Have replied to Subbareddy off-line to the effect that his
> problem might be one of thread-safety.
>
> He has several class variables (eventMappings, factory,
> driver and log) that must be thread-safe in order for the
> servlet to work.
>
> I suspect that the Driver class isn't thread-safe, leading to
> his problem.
>
> > Hi,
> > I am using FOP to generate PDF reports from servlet. I am generating and
> > storing the pdf report into file and serving that file so that I am
avoiding
> > repeating calls from browser. every thing going fine, I am able to
generate
> > pdf reports in development env(windows) and testing (AIX) but when a
load
> > test is performed on application(AIX, Websphere 5), pdf reports are
failing
> > after some time(like 20 users concurrently accessing the reports ) but
all
> > other functions of applicaiton running fine. Here is the exception I am
> > getting and followed by the pdf code segment that causing this
exception.
> >
> > Please let me know if I am doing wrong any where.
> >
> > I am guessing ,Driver has some problem, like hanging or not getting
> > destroyed.
> >
> > Thanks
> > subbareddy.
> >
> >
> > org.apache.fop.apps.FOPException: root must be root element
> > at
> > org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java(Compiled
> > Code))
> > at
> >
org.apache.xalan.transformer.ResultTreeHandler.flushElem(ResultTreeHandler.j
> > ava(Compiled Code))
> > at
> >
org.apache.xalan.transformer.ResultTreeHandler.flushPending(ResultTreeHandle
> > r.java(Compiled Code))
> > at
> >
org.apache.xalan.transformer.ResultTreeHandler.endElement(ResultTreeHandler.
> > java(Compiled Code))
> > at
> >
org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java(
> > Compiled Code))
> > at
> >
org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApp
> > lyTemplates.java(Compiled Code))
> > at
> >
org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.jav
> > a(Compiled Code))
> > at
> >
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Transform
> > erImpl.java(Compiled Code))
> > at
> >
org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(Transformer
> > Impl.java:2081)
> > at
> >
org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.j
> > ava:1137)
> > at
> >
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:
> > 600)
> > at
> >
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:
> > 1054)
> > at
> >
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:
> > 1032)
> > at
> >
com.verizon.wbtt.components.servlet.controller.ControllerServlet.outputXML2P
> > dfFile(ControllerServlet.java(Com
> > piled Code))
> > at
> >
com.verizon.wbtt.components.servlet.controller.ControllerServlet.doProcess(C
> > ontrollerServlet.java(Compiled Co
> > de))
> >
> >
> > ********************** Code Segment *******************
> >
> >
> > public class ControllerServlet extends HttpServlet {
> >
> > private HashMap eventMappings;
> > private TransformerFactory factory =null;
> > Driver driver=null;
> > private org.apache.avalon.framework.logger.Logger log= new
ConsoleLogger
> > (ConsoleLogger.LEVEL_FATAL);
> >
> > public void init() {
> > String eventMappingsURL = null;
> > try{
> >
> > factory=TransformerFactory.newInstance();
> > MessageHandler.setScreenLogger(log);
> > driver = new Driver();
> > driver.setLogger(log);
> > driver.setRenderer(Driver.RENDER_PDF);
> > }
> > protected void outputXML2PdfFile (Source xml, String xslt,
> > HttpServletRequest request, HttpServletResponse response) throws
> > javax.servlet.ServletException, IOException, FOPException,
> > TransformerException {
> > String id = getServletConfig().getServletContext().getRealPath("/");
> > org.apache.fop.configuration.Configuration.put("baseDir", id);
> >
> > HttpSession session = request.getSession();
> > CacheDir pdfDir = (CacheDir) session.getAttribute("__PDFFILEDIR__");
> >
> > if (pdfDir == null) {
> > CacheDir tempDir = (CacheDir)
> > getServletContext().getAttribute("__TEMPFILEDIR__");
> > if (tempDir == null) {
> > //tempDir = new CacheDir (WbtsPdfDir, "temp");
> > tempDir = new CacheDir (id, "temp");
> > tempDir.mkdir();
> > getServletContext().setAttribute("__TEMPFILEDIR__", tempDir);
> > }
> >
> > pdfDir = new CacheDir (tempDir, session.getId());
> > pdfDir.mkdir();
> > session.setAttribute("__PDFFILEDIR__", pdfDir);
> > }
> > // end of cache directory
> >
> > String pdfName = String.valueOf(System.currentTimeMillis()) + ".pdf";
> > OutputStream out = new FileOutputStream(new File(pdfDir, pdfName));
> > driver.setOutputStream (out);
> >
> > TransformerFactory factory = TransformerFactory.newInstance();
> > factory.setURIResolver(defaultURIResolver());
> > StreamSource slt = new
> >
StreamSource(getServletConfig().getServletContext().getResourceAsStream(xslt
> > ));
> > slt.setSystemId(id);
> > Transformer transformer = factory.newTransformer(slt);
> >
> > SAXResult res = new SAXResult(driver.getContentHandler());
> > res.setSystemId(id);
> > xml.setSystemId(id);
> > transformer.transform(xml, res);
> > out.flush(); out.close();
> >
> >
Logger.trace(Logger.SERVLET_LOGGING,"ControllerServlet().outputXML2PdfFile()
> > -- Forwarding to pdf file :"+File.separator + pdfDir.getContextName() +
> > File.separator + pdfName);
> > RequestDispatcher dispatcher =
> > getServletContext().getRequestDispatcher(File.separator +
> > pdfDir.getContextName() + File.separator + pdfName);
> > dispatcher.forward(request, response);
> >
> >
> > //response.sendRedirect (File.separator + pdfDir.getContextName() +
> > File.separator + pdfName);
> > }
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> --
> John Austin <[EMAIL PROTECTED]>
>
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