I am getting “Java heap space Error” while running the reports in tomcat.
I am using the virtualizer with the JRXMLDataSource.
I am getting results/records in XML format. In that XML file it contains
nearly 9000 records. While displaying those details HTML format, I am
getting this heap space error.
JRDataSource ds = new JRXmlDataSource(new BufferedInputStream(new
FileInputStream(getReportOutputDir() + System.getProperty("file.separator")
+ "JobView.xml")), "/job.report");
File fTemp = new File(getReportOutputDir() +
System.getProperty("file.separator") + "tmp");
if (!fTemp.exists()) {
fTemp.mkdirs();
}
JRSwapFile swapFile = new JRSwapFile(fTemp.toString(), 1024, 1024);
JRSwapFileVirtualizer virtualizer = new JRSwapFileVirtualizer(2, swapFile,
true);
// filling the report
JasperPrint jasperPrint = fillReport(getOutputDir() + "reports" +
System.getProperty("file.separator")
+ "JobView.jasper", ds, virtualizer);
JasperExportManager.exportReportToHtmlFile(jasperPrint, getReportOutputDir()
+ System.getProperty("file.separator") + "JobView.html");
if (virtualizer != null) {
virtualizer.cleanup();
}
-----
private JasperPrint fillReport(String fileName, JRDataSource dataSource,
JRSwapFileVirtualizer virtualizer) throws JRException {
long start = System.currentTimeMillis();
// Preparing parameters
Map < Object, Object > params = new HashMap < Object, Object > ();
params.put(JRParameter.REPORT_VIRTUALIZER, virtualizer);
Document document = JRXmlUtils.parse(new File(getReportOutputDir()
+ System.getProperty("file.separator") + "JobView.xml"));
params.put(JRXPathQueryExecuterFactory.PARAMETER_XML_DATA_DOCUMENT,
document);
params.put(JRXPathQueryExecuterFactory.XML_LOCALE, Locale.ENGLISH);
params.put(JRParameter.REPORT_LOCALE, getLocale());
params.put("BaseDir", getOutputDir() + "reports");
JasperPrint jasperPrint = JasperFillManager.fillReport(fileName, params,
dataSource);
virtualizer.setReadOnly(true);
System.err.println("Filling time : " + (System.currentTimeMillis() -
start));
return jasperPrint;
}
I have increased the heap memory, but some times it is executing,but it is
taking 5 to 6 minutes.
Some times it giving heap memory size error. Please correct me if i have
done in wrong way.
Here,JobView.xml file is having data, I have to records from that file and
display those records in HTML format.
Please help me
Thanks,
Satya
--
View this message in context:
http://www.nabble.com/JRFileVirtualizer-for-the-XMLDatasource-tf3914644.html#a11099328
Sent from the jasperreports-questions mailing list archive at Nabble.com.
-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/
_______________________________________________
jasperreports-questions mailing list
jasperreports-questions@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/jasperreports-questions
