java.lang.NullPointerException : ReportEngine.java:794

Hi Experts,

I am new to BIRT and am try to display the rptdesign file in an jsp using this tags

<birt:viewer id="birt" reportDesign="owner.rptdesign"
pattern="frameset"
showTitle="false"
width="1100"
height="400">
</birt:viewer>

I also tried using the java code but i am gettng the same error. The error is :
java.lang.NullPointerException
at org.eclipse.birt.report.engine.api.impl.ReportEngine$EngineExtensionManager.<init>(ReportEngine.java:794)
at org.eclipse.birt.report.engine.api.impl.ReportEngine.<init>(ReportEngine.java:105)
at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory$1.run(ReportEngineFactory.java:18)
at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory$1.run(ReportEngineFactory.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory.createReportEngine(ReportEngineFactory.java:14)
at cvt.admin.util.AdminUtil.runReport(AdminUtil.java:313)
at org.apache.jsp.admin.testreport_jsp._jspService(testreport_jsp.java:63)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)

And this error is thrown at this point . org.eclipse.birt.report.engine.api.impl.ReportEngineFactory.createReportEngine.

Does any one have any solutions to solve this issue. Any help will be appreciated.

Regards,
Suj

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Comments

mwilliams

Hi Suj,

I am unable to reproduce this error, even with your same code except for the report design name. Can you post your entire jsp file?

mwilliams

Or post a sample jsp file and sample report where you run into this same error.

snair

Thanks for replies.
I have only that particular code in JSP. I also tried to call that report using java code below.

public void runReport() throws EngineException
{

IReportEngine engine=null;
EngineConfig config = null;

try{
//PlatformConfig platformConfig = new PlatformConfig();
//platformConfig.setBIRTHome("C:CVTworkspacecvtReportEngine");
//Platform.startup( platformConfig );
config = new EngineConfig( );
System.out.println("BEGINNING");
config.setBIRTHome("C:CVTworkspacehaloWebContentWEB-INFReportEngine");
System.out.println("After set birt home : " + config.getBIRTHome());
config.setLogConfig("c:CVT", Level.FINE);
System.out.println(config.getOSGiArguments());
Platform.startup( config );
System.out.println("AFTER STARTUP");
IReportEngineFactory factory = (IReportEngineFactory) Platform
.createFactoryObject( IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY );
System.out.println("AFTER CREATE FACTORY OBJECT " + factory );
if(config == null)
{
System.out.println("CONFIG IS NULL");
}
else
{
System.out.println("CONFIG NOT NULL");
}
engine = factory.createReportEngine( config );

System.out.println("AFTER CREATE REPORT ENGINE");

IReportRunnable design = null;
//Open the report design
System.out.println("BEFORE OPEN REPORT DESIGN");
design = engine.openReportDesign("owner.rptdesign");
System.out.println("AFTER OPEN REPORT DESIGN");
ReportDesignHandle rdh = (ReportDesignHandle)design.getDesignHandle();

IRunAndRenderTask task = engine.createRunAndRenderTask(design);

Map rpMap = new HashMap();
rpMap.put("Top Count", 15);
rpMap.put("Top Percentage", 5);
task.setParameterValues(rpMap);

HTMLRenderOption options = new HTMLRenderOption();
options.setOutputFileName("output/resample/TopNPercent.html");
options.setOutputFormat("HTML");
//options.setHtmlRtLFlag(false);
//options.setImageDirectory("output/resample/images");
options.setEnableAgentStyleEngine(true);
options.setEmbeddable(true);

task.setRenderOption(options);
task.run();
task.close();
engine.destroy();
}catch( Exception ex){
ex.printStackTrace();
}
finally
{
Platform.shutdown( );
System.out.println("Finished");
}

}

Now i am getting another errror

java.lang.NullPointerException
at org.eclipse.birt.report.engine.api.impl.ReportEngine$EngineExtensionManager.<init>(ReportEngine.java:830)
at org.eclipse.birt.report.engine.api.impl.ReportEngine.<init>(ReportEngine.java:109)
at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory$1.run(ReportEngineFactory.java:18)
at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory$1.run(ReportEngineFactory.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory.createReportEngine(ReportEngineFactory.java:14)
at org.eclipse.birt.report.service.ReportEngineService.setEngineContext(ReportEngineService.java:331)
at org.eclipse.birt.report.service.BirtViewerReportService.setContext(BirtViewerReportService.java:980)
at org.eclipse.birt.report.servlet.ViewerServlet.__getContext(ViewerServlet.java:148)
at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.doPost(BirtSoapMessageDispatcherServlet.java:243)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.service(BirtSoapMessageDispatcherServlet.java:122)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)

This has got something to do with jar files. What ever information i had i have dont the deployment according to it. I am using tomcat as my server and i want to display a report in the jsp page. Any help would be appreciated. I am stuck here for quite some time now

Suj

mwilliams

Suj,

Where are you putting the JSP page? And where is your report design at?

snair

Michael

I have a webcontent folder where all the jsp are placed . And the report file is also placed in the same folder. Is there any specific folder where i need to place this report file ?

Suj

mwilliams

Suj,

I'm not sure that that's your problem, but I put the JSP page in the tomcat/webapps/birt-viewer folder and the report in tomcat/webapps/birt-viewer/report file and call report/reportName.rptdesign in the JSP page. Do you have any issues calling this report not through JSP?

snair

Michael

No, i was able to call the report directly. But am not able to do it through the jsp. Dont know what the problem is.

Suj

mwilliams

Suj, 
 
Here's my exact JSP page code: 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="UTF-8"%>
<%@ taglib uri="/birt.tld" prefix="birt" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body>

<birt:viewer id="birt" reportDesign="report/reportName.rptdesign"
pattern="frameset"
showTitle="false"
width="1100"
height="400">
</birt:viewer>
</body>
</html>

</pre>
 
Have you tried placing the JSP page and report design where I suggested? Also, you're using the same runtime as you are designer version correct?

snair

Michael,

Thanks for your help. It worked now. It was all version issues and issues related to jar. I did a redeploy this time more carefully and it worked. Thanks again.

Suj

mwilliams

Suj,

Good to hear. Let us know whenever you have questions.