[rules-dev] Drools and GWT Application integration
Mauricio Salatino
salaboy at gmail.com
Wed Sep 11 05:53:33 EDT 2013
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 at gmail.com> 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 at gmail.com>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 at gmail.com>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 at 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 at 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 at 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 -
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