<br> Can you try 4.0.3? There was some fix for package management included in 4.0.2 if I'm not mistaken...<br><br> []s<br> Edson<br><br><div><span class="gmail_quote">2007/10/31, igor_b <<a href="mailto:igorbolic@gmail.com">
igorbolic@gmail.com</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>Hi,<br><br>I'm using drools 4.0.1. I'm first adding one package to my RuleBase object,
<br>and everything works just fine:<br><br>...<br>builder.addPackageFromDrl(new InputStreamReader(resource.getInputStream()));<br><br>if(ruleBase == null) {<br> ruleBase = RuleBaseFactory.newRuleBase();<br>}<br>ruleBase.addPackage
(builder.getPackage());<br><br><br>But after some time i need to refresh my rules, so i'm using following code<br>to remove previous package:<br><br>ruleBase.removePackage("org.sample.mypackage");<br><br>and i'm getting the following error:
<br><br>java.lang.NullPointerException<br> at org.drools.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java:222)<br> at org.drools.reteoo.ReteooRuleBase.removeRule(ReteooRuleBase.java:272)<br> at<br>org.drools.common.AbstractRuleBase.removePackage
(AbstractRuleBase.java:460)<br> at<br>com.diosphere.diomedia.common.drools.impl.RulesServiceImpl.refresh(RulesServiceImpl.java:121)<br> at<br>com.diosphere.diomedia.service.impl.PromotionManagerImpl.refreshDRLs
(PromotionManagerImpl.java:39)<br> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br> at<br>sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)<br> at<br>sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)<br> at java.lang.reflect.Method.invoke(Method.java:597)<br> at uk.ltd.getahead.dwr.impl.ExecuteQuery.execute(ExecuteQuery.java:170)<br> at<br>uk.ltd.getahead.dwr.impl.DefaultProcessor.doExec
(DefaultProcessor.java:552)<br> at<br>uk.ltd.getahead.dwr.impl.DefaultProcessor.handle(DefaultProcessor.java:88)<br> at uk.ltd.getahead.dwr.DWRServlet.doPost(DWRServlet.java:178)<br> at javax.servlet.http.HttpServlet.service
(HttpServlet.java:710)<br> at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)<br> at<br>org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)<br> at
<br>org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)<br> at<br>com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)<br> at<br>com.opensymphony.module.sitemesh.filter.PageFilter.doFilter
(PageFilter.java:52)<br> at<br>org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)<br> at<br>org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java
:206)<br> at<br>net.sf.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:167)<br> at<br>net.sf.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:120)<br> at<br>org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:235)<br> at<br>org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)<br> at<br>org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java
:230)<br> at<br>org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)<br> at<br>org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)<br> at<br>org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:104)<br> at<br>org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)<br> at<br>org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)<br>
at<br>org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)<br> at<br>org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)<br> at org.apache.tomcat.util.net.JIoEndpoint$Worker.run
(JIoEndpoint.java:447)<br> at java.lang.Thread.run(Thread.java:619)<br><br>Does anyone have a clue what might be the problem, and how to fix it?<br>Kind regards!<br>--<br>View this message in context: <a href="http://www.nabble.com/Problem-with-removePackage%28%29-tf4727072.html#a13516014">
http://www.nabble.com/Problem-with-removePackage%28%29-tf4727072.html#a13516014</a><br>Sent from the drools - user mailing list archive at <a href="http://Nabble.com">Nabble.com</a>.<br><br>_______________________________________________
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</a><br></blockquote></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> Software Engineer - JBoss Rules Core Developer<br> Office: +55 11 3529-6000<br> Mobile: +55 11 9287-5646<br> JBoss, a division of Red Hat @
<a href="http://www.jboss.com">www.jboss.com</a>