Re: [rules-users] Problem with removePackage()

Hi, I'm using drools 4.0.1. I'm first adding one package to my RuleBase object, and everything works just fine: ... builder.addPackageFromDrl(new InputStreamReader(resource.getInputStream ())); if(ruleBase == null) { ruleBase = RuleBaseFactory.newRuleBase(); } ruleBase.addPackage(builder.getPackage()); But after some time i need to refresh my rules, so i'm using following code to remove previous package: ruleBase.removePackage("org.sample.mypackage"); and i'm getting the following error: java.lang.NullPointerException at org.drools.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java :222) at org.drools.reteoo.ReteooRuleBase.removeRule(ReteooRuleBase.java :272) at org.drools.common.AbstractRuleBase.removePackage(AbstractRuleBase.java :460) at com.diosphere.diomedia.common.drools.impl.RulesServiceImpl.refresh( RulesServiceImpl.java:121) at com.diosphere.diomedia.service.impl.PromotionManagerImpl.refreshDRLs( PromotionManagerImpl.java:39) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java :39) at sun.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at uk.ltd.getahead.dwr.impl.ExecuteQuery.execute(ExecuteQuery.java :170) at uk.ltd.getahead.dwr.impl.DefaultProcessor.doExec(DefaultProcessor.java :552) at uk.ltd.getahead.dwr.impl.DefaultProcessor.handle(DefaultProcessor.java:88) at uk.ltd.getahead.dwr.DWRServlet.doPost(DWRServlet.java:178) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:206) at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage( PageFilter.java:118) at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter( PageFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:206) at net.sf.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java :167) at net.sf.acegisecurity.util.FilterToBeanProxy.doFilter( FilterToBeanProxy.java:120) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke( StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke( StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java :128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java :104) at org.apache.catalina.core.StandardEngineValve.invoke( StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java :261) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process( Http11Protocol.java:581) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run( JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) Does anyone have a clue what might be the problem, and how to fix it? Kind regards! -- View this message in context: http://www.nabble.com/Problem-with-removePackage%28%29-tf4727072.html#a13... Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users