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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Are you sure that basicFlow.rf is in your classpath correctly?<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org]
<b>On Behalf Of </b>James Yu<br>
<b>Sent:</b> 06 September 2011 10:08<br>
<b>To:</b> rules-users@lists.jboss.org<br>
<b>Subject:</b> [rules-users] encounter NullPointerException when adding ruleflow<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi all,<br>
<br>
I tried to run Drools in a webapp, it runs smoothly when I only load simple rules.<br>
The spec I have:<br>
AP server --> WASCE2.1 (or geronimo 2.1)<br>
Spring --> 3.0.5<br>
Drools --> 5.2 Fianl<br>
JVM --> IBM SDK 1.6<br>
<br>
When I tried to use ruleflow --> execute drl in rf, I got NullPointerException with the following trace:<br>
<br>
exception<br>
<br>
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException<br>
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:656)<br>
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)<br>
javax.servlet.http.HttpServlet.service(HttpServlet.java:693)<br>
javax.servlet.http.HttpServlet.service(HttpServlet.java:806)<br>
<br>
root cause<br>
<br>
java.lang.NullPointerException<br>
org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:516)<br>
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:556)<br>
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)<br>
net.viralpatel.drools.core.DroolsCore.createKnowledgeBase(DroolsCore.java:17)<br>
net.viralpatel.contact.controller.ContactController.listContacts(ContactController.java:41)<br>
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br>
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:59)<br>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:39)<br>
java.lang.reflect.Method.invoke(Method.java:612)<br>
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)<br>
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)<br>
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)<br>
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)<br>
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)<br>
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)<br>
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)<br>
javax.servlet.http.HttpServlet.service(HttpServlet.java:693)<br>
javax.servlet.http.HttpServlet.service(HttpServlet.java:806)<br>
<br>
<br>
net.viralpatel.drools.core.DroolsCore.createKnowledgeBase(DroolsCore.java:17) is the following line:<br>
builder.add(ResourceFactory.newClassPathResource("basicFlow.rf"), ResourceType.DRF);<br>
<br>
Any advise is appreciated.<br>
<br>
<br clear="all">
This is a UTF-8 formatted mail<br>
-----------------------------------------------<br>
James C.-C.Yu<br>
<br>
<o:p></o:p></p>
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