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Exception in Birt while loading class in Google Analytics client library [message #639706]

Wed, 17 November 2010 14:37

marko13

Messages: 5
Registered: November 2010

Junior Member

Hi all!

I'm trying to make a report in Birt 2.6.2 which will present data fetched from Google Analytics service. From forum messages and documentation, I've concluded that scription data source should be used for this purpose.

I developed a java class which logs in to GA and fetches data. This class has dependancies to GA client libraries. I've put this class and libs into scriptlib folder and I also included GA libs on Report Designer classpath.

Java class is instantiated in "open" method for a data set.
The problem occures when class instatiates one of the Google's classes from GA client lib when report is run in Report Designer.

This is the stacktrace of the exception:

org.eclipse.birt.report.service.api.ReportServiceException: Error happened while running the report.
   at org.eclipse.birt.report.service.ReportEngineService.throwDummyException(ReportEngineService.java:1097)
   at org.eclipse.birt.report.service.ReportEngineService.runAndRenderReport(ReportEngineService.java:926)
   at org.eclipse.birt.report.service.BirtViewerReportService.runAndRenderReport(BirtViewerReportService.java:973)
   at org.eclipse.birt.report.service.actionhandler.BirtGetPageAllActionHandler.__execute(BirtGetPageAllActionHandler.java:131)
   at org.eclipse.birt.report.service.actionhandler.AbstractBaseActionHandler.execute(AbstractBaseActionHandler.java:90)
   at org.eclipse.birt.report.soapengine.processor.AbstractBaseDocumentProcessor.__executeAction(AbstractBaseDocumentProcessor.java:47)
   at org.eclipse.birt.report.soapengine.processor.AbstractBaseComponentProcessor.executeAction(AbstractBaseComponentProcessor.java:143)
   at org.eclipse.birt.report.soapengine.processor.BirtDocumentProcessor.handleGetPageAll(BirtDocumentProcessor.java:183)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at org.eclipse.birt.report.soapengine.processor.AbstractBaseComponentProcessor.process(AbstractBaseComponentProcessor.java:112)
   at org.eclipse.birt.report.soapengine.endpoint.BirtSoapBindingImpl.getUpdatedObjects(BirtSoapBindingImpl.java:66)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:397)
   at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:186)
   at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323)
   at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
   at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
   at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
   at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:454)
   at org.apache.axis.server.AxisServer.invoke(AxisServer.java:281)
   at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)
   at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.doPost(BirtSoapMessageDispatcherServlet.java:265)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
   at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
   at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.service(BirtSoapMessageDispatcherServlet.java:122)
   at org.eclipse.equinox.http.registry.internal.ServletManager$ServletWrapper.service(ServletManager.java:180)
   at org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61)
   at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:126)
   at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:60)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
   at org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet.service(HttpServerManager.java:318)
   at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
   at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)
   at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
   at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
   at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
   at org.mortbay.jetty.Server.handle(Server.java:326)
   at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
   at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:939)
   at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756)
   at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
   at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
   at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
   at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: org.eclipse.birt.report.engine.api.EngineException: Error happened while running the report.
   at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.doRun(RunAndRenderTask.java:209)
   at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.run(RunAndRenderTask.java:77)
   at org.eclipse.birt.report.service.ReportEngineService.runAndRenderReport(ReportEngineService.java:920)
... 49 more
Caused by: java.lang.ExceptionInInitializerError
   at bumblehood.reporting.GoogleAnalyticsDataFetcher.(GoogleAnalyticsDataFetcher.java:61)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
   at java.lang.reflect.Constructor.newInstance(Unknown Source)
   at org.mozilla.javascript.MemberBox.newInstance(MemberBox.java:194)
   at org.mozilla.javascript.NativeJavaClass.constructSpecific(NativeJavaClass.java:281)
   at org.mozilla.javascript.NativeJavaClass.construct(NativeJavaClass.java:200)
   at org.mozilla.javascript.ScriptRuntime.newObject(ScriptRuntime.java:2327)
   at org.mozilla.javascript.gen.c10._c1(:3)
   at org.mozilla.javascript.gen.c10.call()
   at org.mozilla.javascript.optimizer.OptRuntime.callName0(OptRuntime.java:108)
   at org.mozilla.javascript.gen.c11._c0(:0)
   at org.mozilla.javascript.gen.c11.call()
   at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:398)
   at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3065)
   at org.mozilla.javascript.gen.c11.call()
   at org.mozilla.javascript.gen.c11.exec()
   at org.eclipse.birt.core.script.JavascriptEvalUtil.evaluateRawScript(JavascriptEvalUtil.java:95)
   at org.eclipse.birt.core.script.JavascriptEvalUtil.evaluateScript(JavascriptEvalUtil.java:134)
   at org.eclipse.birt.data.engine.script.ScriptEvalUtil.evaluateJSAsExpr(ScriptEvalUtil.java:1001)
   at org.eclipse.birt.data.engine.script.JSMethodRunner.runScript(JSMethodRunner.java:76)
   at org.eclipse.birt.report.engine.script.internal.DtEScriptExecutor.handleJS(DtEScriptExecutor.java:90)
   at org.eclipse.birt.report.engine.script.internal.DataSetScriptExecutor.handleJS(DataSetScriptExecutor.java:219)
   at org.eclipse.birt.report.engine.script.internal.ScriptDataSetScriptExecutor.handleOpen(ScriptDataSetScriptExecutor.java:88)
   at org.eclipse.birt.data.engine.impl.ScriptDataSetRuntime.open(ScriptDataSetRuntime.java:80)
   at org.eclipse.birt.data.engine.impl.PreparedScriptDSQuery$ScriptDSQueryExecutor$CustomDataSet.open(PreparedScriptDSQuery.java:247)
   at org.eclipse.birt.data.engine.impl.PreparedScriptDSQuery$ScriptDSQueryExecutor.executeOdiQuery(PreparedScriptDSQuery.java:223)
   at org.eclipse.birt.data.engine.impl.QueryExecutor.execute(QueryExecutor.java:1094)
   at org.eclipse.birt.data.engine.impl.ServiceForQueryResults.executeQuery(ServiceForQueryResults.java:232)
   at org.eclipse.birt.data.engine.impl.QueryResults.getResultIterator(QueryResults.java:172)
   at org.eclipse.birt.report.engine.data.dte.QueryResultSet.(QueryResultSet.java:98)
   at org.eclipse.birt.report.engine.data.dte.DteDataEngine.doExecuteQuery(DteDataEngine.java:168)
   at org.eclipse.birt.report.engine.data.dte.AbstractDataEngine.execute(AbstractDataEngine.java:265)
   at org.eclipse.birt.report.engine.executor.ExecutionContext.executeQuery(ExecutionContext.java:1876)
   at org.eclipse.birt.report.engine.executor.QueryItemExecutor.executeQuery(QueryItemExecutor.java:80)
   at org.eclipse.birt.report.engine.executor.TableItemExecutor.execute(TableItemExecutor.java:62)
   at org.eclipse.birt.report.engine.internal.executor.dup.SuppressDuplicateItemExecutor.execute(SuppressDuplicateItemExecutor.java:43)
   at org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportItemExecutor.execute(WrappedReportItemExecutor.java:46)
   at org.eclipse.birt.report.engine.internal.executor.l18n.LocalizedReportItemExecutor.execute(LocalizedReportItemExecutor.java:34)
   at org.eclipse.birt.report.engine.layout.html.HTMLBlockStackingLM.layoutNodes(HTMLBlockStackingLM.java:65)
   at org.eclipse.birt.report.engine.layout.html.HTMLPageLM.layout(HTMLPageLM.java:90)
   at org.eclipse.birt.report.engine.layout.html.HTMLReportLayoutEngine.layout(HTMLReportLayoutEngine.java:99)
   at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.doRun(RunAndRenderTask.java:180)
... 51 more
Caused by: java.lang.NullPointerException
   at com.google.gdata.client.Service.(Service.java:97)
... 95 more

The java code for root NPE is:

	public class Service {

		private static final String SERVICE_VERSION =
		  "GData-Java/" + Service.class.getPackage().getImplementationVersion() // <------ THIS IS LINE WHICH THROWS NPE
			  + "(gzip)"; // Necessary to get GZIP encoded responses
			  
	....

Does anyone understands why this line causes NPE?

Thanks,
Marko

[Updated on: Wed, 17 November 2010 14:57]

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