[rules-users] KnowledgeAgent and OSGI

[Esteban Aliverti]

First, you don't need to compie the change set by your self the agent will
do that in applyChangeSet() method.
Some questions that could help to figure out the problem:

   1. Which version of drools are you using? (I assume >= 5.1M1)
   2. Do you have any stacktrace/log file?
   3. Is your cange set pointing to DRL resources. If so, the
   agent internally  creates kbuilders to compile them. You could have class
   loaders problems there. By default the agent logs everything to System.err.
   Could you post the output here?

Best,

On Fri, Jun 25, 2010 at 9:59 AM, mmarmol <marcelo.marmol at gmail.com> wrote:

>
> Hi, I have managed to install Drools-core and Drools-compiler in my Equinox
> osgi environment, I can compile rules and execute them just fine, I was
> just
> wandering how to configure a KnowledgeAgent using
> KnowledgeBuilderFactoryService and KnowledgeBaseFactoryService. I managed
> to
> configure one but i am not able to reload rules when they change at
> runtime.
> I have started ResourceChangeScannerService and
> ResourceChangeNotifierService, changeset related to the rules file gets
> read
> but no change gets implemented. An idea?
>
>
> Here is the code:
>
>                ResourceFactory.getResourceChangeScannerService().start();
>                ResourceFactory.getResourceChangeNotifierService().start();
>
>                ServiceReference serviceRef = bc
>
>  .getServiceReference(ServiceRegistry.class.getName());
>                ServiceRegistry registry = (ServiceRegistry)
> bc.getService(serviceRef);
>
>                KnowledgeBuilderFactoryService
> knowledgeBuilderFactoryService = registry
>                                .get(KnowledgeBuilderFactoryService.class);
>
>                KnowledgeBaseFactoryService knowledgeBaseFactoryService =
> registry
>                                .get(KnowledgeBaseFactoryService.class);
>                ResourceFactoryService resourceFactoryService = registry
>                                .get(ResourceFactoryService.class);
>
>                KnowledgeBuilderConfiguration kbConf =
> knowledgeBuilderFactoryService
>                                .newKnowledgeBuilderConfiguration(null,
> getClass()
>                                                .getClassLoader());
>
>                KnowledgeBuilder kbuilder = knowledgeBuilderFactoryService
>                                .newKnowledgeBuilder(kbConf);
>                ResourceFactoryService resource = resourceFactoryService;
>                kbuilder.add(resource.newFileSystemResource(filePath),
>                                ResourceType.CHANGE_SET);
>
>                if (kbuilder.hasErrors()) {
>                        System.out.println(kbuilder.getErrors());
>                        throw new
> RuntimeException(kbuilder.getErrors().toString());
>                }
>
>                KnowledgeBaseConfiguration kbaseConf =
> knowledgeBaseFactoryService
>                                .newKnowledgeBaseConfiguration(null,
> getClass()
>                                                .getClassLoader());
>
>                KnowledgeBase kbase = knowledgeBaseFactoryService
>                                .newKnowledgeBase(kbaseConf);
>                kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
>
>                KnowledgeAgentConfiguration aconf =
>                KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
>                aconf.setProperty("drools.agent.scanDirectories", "true");
>                aconf.setProperty("drools.agent.scanResources", "true");
>                aconf.setProperty("drools.agent.newInstance", "false");
>
>                kagent = KnowledgeAgentFactory.newKnowledgeAgent(
> "CoreDroolsAgent",kbase,
> aconf);
>
>  kagent.applyChangeSet(resource.newFileSystemResource(filePath));
>
> Thanks in advance!
>
> Cheers
> --
> View this message in context:
> http://drools-java-rules-engine.46999.n3.nabble.com/KnowledgeAgent-and-OSGI-tp921989p921989.html
> Sent from the Drools - User mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
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>



-- 
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Esteban Aliverti
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