Re: [rules-users] KnowledgeAgent and OSGI

Wed, 04 Aug 2010 03:36:24 -0700 

 On 04/08/2010 11:06, David Conde wrote:

Thanks Mark,

Cheers for the info.
I've seen the OSGi bundle zip (and the boot bundle list [1]) but it seemed to have quite a large amount of dependencies for just drools-core and drools-compiler. Do you know if all these bundles are required for this subset? If not would you happen to have the list of what is?
If you don't have this handy I'll send it on so that you have it once I have figured it out :)
The spring testing framework makes you list all the dependencies manually, which it resolves against that osgi-bundles.zip contents. This is the file: 
http://fisheye.jboss.org/browse/JBossRules/trunk/osgi-bundles/org.drools.osgi.test/src/test/resources/boot-bundles.properties?r=HEAD
It does contain a lot more than normal, mostly I just kept adding stuff intil OSGi would resolve and the unit tests pass. It may be possible not to include things like jaxb (especially if you are on jdk6) and some of the other peripheral jars. We have used the spring repository and sometimes the transitivie dependencies are not left optional which means they are dragged in, and even if we don't us them OSGi will not resolve without them there. Maybe check out trunk and help us work on this and improve it?
The problem with OSGi is so few dependencies are are published as OSGi bundles, which means we have to rely on things like the spring osgi repository. That automates the building of the bundles and doesn't always handle optional dependencies that well. 

Mark
[1] http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/osgi-bundles/org.drools.osgi.test/src/test/resources/boot-bundles.properties 

- Dave
2010/8/4 Mark Proctor <[email protected] <mailto:[email protected]>> 

    The set of OSGi bundles dependencies can be used here:
    http://www.jboss.org/drools/downloads.html

    We test against spring:
    
http://fisheye.jboss.org/browse/JBossRules/trunk/osgi-bundles/org.drools.osgi.test/src/test/java/org/drools/osgi/integrationtests/SimpleOsgiTest.java

    This is our project that builds osgi-bundles and does some testing
    of Drools against OSGi:
    http://fisheye.jboss.org/browse/JBossRules/trunk/osgi-bundles/

    I have done some minimal OSGi docs. OSGI is stil la work in
    progress for us and we have only osgi-ified some aspects Drools,
    although we have done extensive work on the classloaders to make
    it fit better.
    
https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/docs/drools-integration/html/ch05.html

    Please do test what we have, maybe help us OSGi-ify other aspects
    of drools.

    Mark

    On 04/08/2010 10:25, David Conde wrote:

    Hi,

    I'm trying to get drools-core and drools-compiler 5.1 running on
    spring dm-server. Does anyone have the minimal list of OSGi
    bundles as maven dependencies handy?

    Thanks,
    Dave

    On 25 June 2010 13:59, mmarmol <[email protected]
    <mailto:[email protected]>> 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.
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