hello all,
i am using Spring and have a view that works well for a time but after a
hours begin to throws exception all the requests:
the view is:
public class FormularioPdfView extends AbstractView {
private static final int OUTPUT_BYTE_ARRAY_INITIAL_SIZE = 1024;
public FormularioPdfView() {
setContentType("application/pdf");
}
protected final void renderMergedOutputModel(Map model,
HttpServletRequest request, HttpServletResponse response) throws Exception {
ByteArrayOutputStream byteFormulario = new
ByteArrayOutputStream(OUTPUT_BYTE_ARRAY_INITIAL_SIZE);
Map pdfFields = (Map)model.get("pdfFields");
byte[] templateImpreso =
(byte[])model.get("templateImpreso");
pasteTemplateFormulario(pdfFields, templateImpreso,
byteFormulario);
// Write content type and also length (determined via byte
array).
response.setContentType(getContentType());
response.setHeader("Content-disposition", "attachment" );
response.setContentLength(byteFormulario.size());
// Flush byte array to servlet output stream.
ServletOutputStream out = response.getOutputStream();
byteFormulario.writeTo(out);
out.flush();
}
private void pasteTemplateFormulario(Map fieldsForm, byte[]
bImpreso, OutputStream byteFormulario) throws Exception
{
PdfReader reader = new PdfReader(bImpreso);
PdfStamper stamp = new PdfStamper(reader, byteFormulario);
AcroFields acroFields = stamp.getAcroFields();
Iterator entries = fieldsForm.entrySet().iterator();
while (entries.hasNext())
{
Map.Entry entry = (Map.Entry)entries.next();
String key = entry.getKey().toString();
String value = (entry.getValue() != null ?
entry.getValue().toString() : "");
acroFields.setField(key, value);
}
stamp.close(); // throw NullPointerException
}
}
[/code]
the exception:
[9/05/05 13:50:28:691 CEST] 2c006234 WebGroup X Servlet Error: :
java.lang.NullPointerException
at com.lowagie.text.pdf.PRStream.toPdf(PRStream.java(Compiled Code))
at
com.lowagie.text.pdf.PdfIndirectObject.writeTo(PdfIndirectObject.java(Compil
ed Code))
at
com.lowagie.text.pdf.PdfWriter$PdfBody.add(PdfWriter.java(Compiled Code))
at com.lowagie.text.pdf.PdfWriter.addToBody(PdfWriter.java(Inlined
Compiled Code))
at
com.lowagie.text.pdf.PdfStamperImp.close(PdfStamperImp.java(Compiled Code))
at com.lowagie.text.pdf.PdfStamper.close(PdfStamper.java:185)
at
iam.formularios.web.views.FormularioPdfView.pasteTemplateFormulario(Formular
ioPdfView.java:123)
at
iam.formularios.web.views.FormularioPdfView.renderMergedOutputModel(Formular
ioPdfView.java:83)
at
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:2
50)
at
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.j
ava:917)
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServl
et.java:696)
at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServle
t.java:623)
at
org.springframework.web.servlet.FrameworkServlet.serviceWrapper(FrameworkSer
vlet.java:384)
at
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java
:344)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
com.ibm.servlet.engine.webapp.StrictServletInstance.doService(ServletManager
.java:827)
at
com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(StrictLifecycl
eServlet.java:167)
at
com.ibm.servlet.engine.webapp.IdleServletState.service(StrictLifecycleServle
t.java:297)
at
com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(StrictLifecycle
Servlet.java:110)
at
com.ibm.servlet.engine.webapp.ServletInstance.service(ServletManager.java:47
2)
at
com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(ServletMan
ager.java:1012)
at
com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(ServletManag
er.java:913)
at
com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(W
ebAppRequestDispatcher.java:721)
at
com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(WebAppRequest
Dispatcher.java:374)
at
com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(WebAppRequestD
ispatcher.java:118)
at
com.ibm.servlet.engine.srt.WebAppInvoker.doForward(WebAppInvoker.java:134)
at
com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.
java:239)
at
com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(CachedIn
vocation.java:67)
at
com.ibm.servlet.engine.invocation.CacheableInvocationContext.invoke(Cacheabl
eInvocationContext.java:106)
at
com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(ServletRequ
estProcessor.java:154)
at
com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(OSEListener
.java:317)
at
com.ibm.servlet.engine.http11.HttpConnection.handleRequest(HttpConnection.ja
va:60)
at
com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:477)
at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:351)
at com.ibm.ws.util.CachedThread.run(ThreadPool.java(Compiled Code))
anyone what happen???
thanks in advance,
C�sar.
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