Re: [rules-dev] Drools and GWT Application integration

Ok, so the error is pretty clear: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory You need to add that to your class path On Wed, Sep 11, 2013 at 10:51 AM, Moses Kalema <mkgremo20(a)gmail.com&gt;wrote: > In my serviceImplementation[in the server package] class in GWT RPC > When i try to check the execution the system doesn't run this line: > KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); > > KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); > //inputStream = > this.getClass().getClassLoader().getResourceAsStream("ChangeSet.xml"); > url= this.getClass().getClassLoader().getResource("ChangeSet.xml"); > workingDirectory = System.getProperty("user.dir"); > System.out.println("URL "+url); > file = new File(workingDirectory +"/src/ChangeSet.xml"); > if(file.exists()){ > System.out.println("Directory "+file.getName()); > } > else{ > System.out.println("File not seen"); > } > kbuilder.add( > ResourceFactory.newUrlResource(url),ResourceType.CHANGE_SET); > if( kbuilder.hasErrors() ) { > > System.out.println( kbuilder.getErrors() ); > System.out.println("The changeset file has errors"); > // return; > }else{ > System.out.println("The changeset has no errors"); > } > > KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); > System.out.println("knowledgebase has been created"); > > KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent( > "MyAgent" ); > // URL url = getClass().getResource("ChangeSet.xml"); > // File file = new File(url.getPath()); > kagent.applyChangeSet( ResourceFactory.newUrlResource(url) ); > kbase = kagent.getKnowledgeBase(); > ResourceFactory.getResourceChangeNotifierService().start(); > ResourceFactory.getResourceChangeScannerService().start(); > System.out.println("knowledge agent created"); > > StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(); > System.out.println("session created"); > FactType factType = kbase.getFactType("procnet.requisition.test", > "requisition"); > try { > Object obj = factType.newInstance(); > factType.set(obj, "requisitionType", requisitionType); > factType.set(obj, "totalCost", totalCost); > FactHandle objHandle = ksession.insert(obj); > ksession.fireAllRules(); > System.out.println(factType.get(obj, "approvalMessage")); > approvalMessage = (String) factType.get(obj, "approvalMessage"); > //System.out.println(factType.get(obj, "name")); > } catch (InstantiationException e) { > e.printStackTrace(); > } catch (IllegalAccessException e) { > e.printStackTrace(); > } > return approvalMessage; > This is the exact code i use in a normal java application and it works > fine,infact even when i run the class as a java application it returns the > approve message from guvnor. > I find this strange > This is the error am getting, > 02:19:43.040 [WARN] Exception while dispatching incoming RPC call > > com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.planet.requisition.client.rules.RequisitionTemp com.planet.requisition.client.rules.RequisitionTempService.getRequisitionDet(java.lang.String,int)' threw an unexpected exception: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory > > > > at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385) > at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588) > at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) > > > > at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) > at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) > > > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) > at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) > at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362) > > > > at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) > at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) > at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729) > > > > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) > at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) > at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) > > > > at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) > at org.mortbay.jetty.Server.handle(Server.java:324) > at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505) > at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843) > > > > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647) > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380) > at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395) > > > > at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488) > Caused by: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory > at org.drools.util.ServiceRegistryImpl.<clinit>(ServiceRegistryImpl.java:55) > > > > at org.drools.builder.KnowledgeBuilderFactory.loadServiceFactory(KnowledgeBuilderFactory.java:130) > at org.drools.builder.KnowledgeBuilderFactory.getKnowledgeBuilderServiceFactory(KnowledgeBuilderFactory.java:124) > > > > at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46) > at com.requisition.RequisitionApproval.main(RequisitionApproval.java:35) > at com.requisition.TestInputStream.main(TestInputStream.java:22) > > > > at com.planet.requisition.server.RequisitionTempServiceImpl.getRequisitionDet(RequisitionTempServiceImpl.java:37) > 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 com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569) > at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) > > > > at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) > at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) > > > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) > at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) > at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362) > > > > at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) > at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) > at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729) > > > > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) > at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) > at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) > > > > at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) > at org.mortbay.jetty.Server.handle(Server.java:324) > at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505) > at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843) > > > > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647) > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380) > at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395) > > > > at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488) > Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory > at java.net.URLClassLoader$1.run(Unknown Source) > at java.security.AccessController.doPrivileged(Native Method) > > > > at java.net.URLClassLoader.findClass(Unknown Source) > at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload$WebAppClassLoaderExtension.findClass(JettyLauncher.java:372) > at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:366) > > > > at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337) > at org.drools.util.ServiceRegistryImpl.<clinit>(ServiceRegistryImpl.java:55) > at org.drools.builder.KnowledgeBuilderFactory.loadServiceFactory(KnowledgeBuilderFactory.java:130) > > > > at org.drools.builder.KnowledgeBuilderFactory.getKnowledgeBuilderServiceFactory(KnowledgeBuilderFactory.java:124) > at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46) > > > > at com.requisition.RequisitionApproval.main(RequisitionApproval.java:35) > at com.requisition.TestInputStream.main(TestInputStream.java:22) > at com.planet.requisition.server.RequisitionTempServiceImpl.getRequisitionDet(RequisitionTempServiceImpl.java:37) > > > > 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 com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569) > at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) > at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) > > > > at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) > > > > at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) > at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362) > at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) > > > > at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) > at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729) > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) > > > > at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) > at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) > at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) > > > > at org.mortbay.jetty.Server.handle(Server.java:324) > at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505) > at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843) > > > > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647) > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380) > at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395) > > > > at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488) > > > > On Wed, Sep 11, 2013 at 11:11 AM, Mauricio Salatino <salaboy(a)gmail.com&gt;wrote: > >> Hi, we are using GWT and Drools in all our tooling.. For example if you >> take a look at the kie-wb workbench or the jbpm-console-ng they are create >> Knowledge Session (kie sessions) right now. >> >> >> On Wed, Sep 11, 2013 at 9:07 AM, Moses Kalema <mkgremo20(a)gmail.com&gt;wrote: >> >>> Hello everyone, >>> I recently started using Drools Guvnor and i find it necessary. I >>> create rules on Guvnor and fire the rules in a Java application and >>> everything is fine. >>> However when i try to access the rules in a GWT application,i get an >>> error which looks like none of the Drools code is executed. >>> My request is if any one has used rules n a GWT application please help >>> me out >>> >>> -- >>> Moses Kalema >>> Bachelor Science in Computer Engineering >>> Software/Mobile/Embedded Systems Developer >>> +256773391723 >>> +256704209937 >>> Skype: mkgremo >>> Twitter: @mkgremo >>> "Life's Success is based on Opportunity not Chance" >>> >>> >>> _______________________________________________ >>> rules-dev mailing list >>> rules-dev(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-dev >>> >> >> >> >> -- >> - MyJourney @ http://salaboy.com <http://salaboy.wordpress.com> >> - Co-Founder @ http://www.jugargentina.org >> - Co-Founder @ http://www.jbug.com.ar >> >> - Salatino "Salaboy" Mauricio - >> >> _______________________________________________ >> rules-dev mailing list >> rules-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-dev >> > > > > -- > Moses Kalema > Bachelor Science in Computer Engineering > Software/Mobile/Embedded Systems Developer > +256773391723 > +256704209937 > Skype: mkgremo > Twitter: @mkgremo > "Life's Success is based on Opportunity not Chance" > > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > -- - MyJourney @ http://salaboy.com <http://salaboy.wordpress.com> - Co-Founder @ http://www.jugargentina.org - Co-Founder @ http://www.jbug.com.ar - Salatino "Salaboy" Mauricio - _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev