| Accessing http session attributes in report [message #365923] |
Wed, 12 November 2008 13:45  |
Eclipse User |
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Hello,
I don't manage to access http session attributes in my reports.
I do the following in the beforeFactory method of my report (as advised in
the tutorial):
var request = reportContext.getHttpServletRequest();
var session = request.getSession();
and I get this error:
TypeError: Cannot call method "getSession" of null
(/report/method[@name="beforeFactory"]#2).
at
org.eclipse.birt.report.engine.executor.ExecutionContext.eva luate(ExecutionContext.java:639)
at
org.eclipse.birt.report.engine.script.internal.ScriptExecuto r.handleJSInternal(ScriptExecutor.java:60)
at
org.eclipse.birt.report.engine.script.internal.ScriptExecuto r.handleJS(ScriptExecutor.java:47)
at
org.eclipse.birt.report.engine.script.internal.ReportScriptE xecutor.handleBeforeFactory(ReportScriptExecutor.java:67)
at
org.eclipse.birt.report.engine.api.impl.EngineTask.startFact ory(EngineTask.java:1318)
at
org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.doR un(RunAndRenderTask.java:90)
at
org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.run (RunAndRenderTask.java:72)
at test.BirtServlet.doGet(BirtServlet.java:45)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.service(Servl etWrapper.java:989)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest (ServletWrapper.java:501)
at
com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleReque st(ServletWrapper.java:464)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.j ava:3276)
at
com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGro up.java:267)
at
com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContai ner.java:811)
at
com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebCont ainer.java:1455)
at
com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChanne lLink.java:113)
at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleD iscrimination(HttpInboundLink.java:454)
at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleN ewInformation(HttpInboundLink.java:383)
at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(H ttpInboundLink.java:263)
at
com.ibm.ws.ssl.channel.impl.SSLConnectionLink.determineNextC hannel(SSLConnectionLink.java:1002)
at
com.ibm.ws.ssl.channel.impl.SSLConnectionLink.readyInboundPo stHandshake(SSLConnectionLink.java:691)
at
com.ibm.ws.ssl.channel.impl.SSLConnectionLink.readyInbound(S SLConnectionLink.java:547)
at
com.ibm.ws.ssl.channel.impl.SSLConnectionLink.ready(SSLConne ctionLink.java:279)
at
com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback .sendToDiscriminators(NewConnectionInitialReadCallback.java: 214)
at
com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback .complete(NewConnectionInitialReadCallback.java:113)
at
com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.future Completed(AioReadCompletionListener.java:165)
at
com.ibm.io.async.AbstractAsyncFuture.invokeCallback(Abstract AsyncFuture.java:217)
at
com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(As yncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:1 95)
at
com.ibm.io.async.ResultHandler.runEventProcessingLoop(Result Handler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1469)
Caused by: org.mozilla.javascript.EcmaError: TypeError: Cannot call method
"getSession" of null (/report/method[@name="beforeFactory"]#2)
at
org.mozilla.javascript.ScriptRuntime.constructError(ScriptRu ntime.java:3350)
at
org.mozilla.javascript.ScriptRuntime.constructError(ScriptRu ntime.java:3340)
at org.mozilla.javascript.ScriptRuntime.typeError(ScriptRuntime .java:3356)
at
org.mozilla.javascript.ScriptRuntime.typeError2(ScriptRuntim e.java:3375)
at
org.mozilla.javascript.ScriptRuntime.undefCallError(ScriptRu ntime.java:3394)
at
org.mozilla.javascript.ScriptRuntime.getPropFunctionAndThis( ScriptRuntime.java:2026)
at
org.mozilla.javascript.optimizer.OptRuntime.callProp0(OptRun time.java:117)
at
org.mozilla.javascript.gen.c4._c0(/report/method[@name="beforeFactory "]:2)
at
org.mozilla.javascript.gen.c4.call(/report/method[@name="beforeFactory "])
at
org.mozilla.javascript.ContextFactory.doTopCall(ContextFacto ry.java:393)
at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime .java:2834)
at
org.mozilla.javascript.gen.c4.call(/report/method[@name="beforeFactory "])
at
org.mozilla.javascript.gen.c4.exec(/report/method[@name="beforeFactory "])
at org.eclipse.birt.core.script.ScriptContext.eval(ScriptContex t.java:241)
at
org.eclipse.birt.report.engine.executor.ExecutionContext.eva luate(ExecutionContext.java:635)
... 34 more
I wrote a small servlet to run my report and demonstrate my problem:
public class BirtServlet extends HttpServlet {
protected void doGet(HttpServletRequest pRequest, HttpServletResponse
pResponse) throws ServletException, IOException {
/*Make sure we have a session */
pRequest.getSession(true);
try {
EngineConfig config = new EngineConfig();
config.setEngineHome("");
config.setPlatformContext(new PlatformServletContext(getServletContext()));
Platform.startup(config);
IReportEngineFactory factory = (IReportEngineFactory)
Platform.createFactoryObject(IReportEngineFactory.EXTENSION_ REPORT_ENGINE_FACTORY);
IReportEngine engine = factory.createReportEngine(config);
IReportRunnable design =
engine.openReportDesign(getServletContext().getResourceAsStr eam( "/MyReport.rptdesign"));
IRunAndRenderTask task = engine.createRunAndRenderTask(design);
HTMLRenderOption options = new HTMLRenderOption();
options.setOutputStream(pResponse.getOutputStream());
options.setOutputFormat("html");
task.setRenderOption(options);
task.run();
task.close();
engine.destroy();
Platform.shutdown();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Can anyone help me on this?
Note that I tested my report with the WebViewerExample from the BIRT
runtime and it works fine in that case. So there must be something wrong
in my servlet or with the configuration of my report engine.
I am running the BIRT 2.3.0 runtime on Websphere 6.1, the plugins are
located in the WEB-INF\platform directory of my WAR and the BIRT jars were
copied into the WEB-INF\lib directory of the WAR.
Here is my report design for convenience:
<?xml version="1.0" encoding="UTF-8"?>
<!-- Written by Eclipse BIRT 2.0 -->
<report xmlns="http://www.eclipse.org/birt/2005/design" version="3.2.6"
id="1">
<property name="createdBy">Eclipse BIRT Designer Version
2.1.2.v20070205-1728 Build <20070205-1728></property>
<property name="units">in</property>
<property name="comments">Copyright (c) 2006 <<Your Company Name
here>></property>
<method name="beforeFactory"><![CDATA[var request =
reportContext.getHttpServletRequest();
var session = request.getSession();
session.setAttribute("test", "hello");]]></method>
<page-setup>
<simple-master-page name="Simple MasterPage" id="2">
<page-footer>
<text id="3">
<property name="contentType">html</property>
<text-property name="content"><![CDATA[<value-of>new
Date()</value-of>]]></text-property>
</text>
</page-footer>
</simple-master-page>
</page-setup>
<body>
<label id="4">
<text-property name="text">MyReport</text-property>
</label>
<text-data id="5">
<expression
name="valueExpr">session.getAttribute("test")</expression >
<property name="contentType">html</property>
</text-data>
</body>
</report>
Any help would be greatly appreciated!!!
Nicolas
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