[rules-users] Drools with Guvnor

[Jervisliu]

With the new KnowledgeAgent API, you can not only connect to Guvnor 
server remotely to store and retrieve rules, but also to add or update 
rules. It also has basic authentication supported. Take a look at the 
unit test: 
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-compiler/src/test/java/org/drools/agent/KnowledgeAgentTest.java

Below is a very simple test case that connects to Guvnor to retrieve a 
rule package, build a KnowledgeSession, then fire rules:

    public void testBasicAuthentication() throws Exception {
        String xml = "";
        xml += "<change-set 
xmlns='http://drools.org/drools-5.0/change-set'";
        xml += "    xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'";
        xml += "    
xs:schemaLocation='http://drools.org/drools-5.0/change-set 
drools-change-set-5.0.xsd' >";
        xml += "    <add> ";
        xml += "        <resource 
source='http://localhost:8081/drools-guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST' 
type='PKG'  basicAuthentication='enabled' username='admin' 
password='admin'/>";
        xml += "    </add> ";
        xml += "</change-set>";
        File fxml = fileManager.newFile("changeset.xml");
        Writer output = new BufferedWriter(new FileWriter(fxml));
        output.write(xml);
        output.close();

        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();

        ResourceChangeScannerConfiguration sconf = ResourceFactory
                .getResourceChangeScannerService()
                .newResourceChangeScannerConfiguration();
        sconf.setProperty("drools.resource.scanner.interval", "2");
        ResourceFactory.getResourceChangeScannerService().configure(sconf);

        KnowledgeAgentConfiguration aconf = KnowledgeAgentFactory
                .newKnowledgeAgentConfiguration();
        aconf.setProperty("drools.agent.scanDirectories", "true");
        aconf.setProperty("drools.agent.scanResources", "true");
        aconf.setProperty("drools.agent.newInstance", "true");
        KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent(
                "test agent", kbase, aconf);

        kagent.applyChangeSet(ResourceFactory.newUrlResource(fxml.toURI()
                .toURL()));

        StatefulKnowledgeSession ksession = kagent.getKnowledgeBase()
                .newStatefulKnowledgeSession();
        List<String> list = new ArrayList<String>();
        ksession.setGlobal("list", list);
        ksession.fireAllRules();
        ksession.dispose();

        assertEquals(2, list.size());
        assertTrue(list.contains("rule1"));
        assertTrue(list.contains("rule2"));
    }

Hope this helps,

Jervis

Michael Rhoden wrote:
> Yes and no. Guvnor uses a JCR repository (the default is 
> http://jackrabbit.apache.org/) which can not be accessed using 
> hibernate directly. We ran into this issue, and the only way to use 
> guvnor as of 6 months ago was to have a user go into guvnor and create 
> a DRL file by clicking a few buttons. Not a big deal, but it isn't 
> automated. You can then use that DRL as a resource in your 
> application. I know there was some working being done to be able to 
> pull out DRLs from Guvnor using xml calls, but don't know if that was 
> ever completed.
>
> Michael Rhoden
>
>
> ----- Original Message -----
> From: "bbarani" <bbarani at gmail.com>
> To: rules-users at lists.jboss.org
> Sent: Wednesday, May 19, 2010 5:12:57 PM
> Subject: [rules-users] Drools with Guvnor
>
>
> Hi,
>
> I am very new to Drools and very very new to Guvnor.
>
> I am in the process of creating a rule engine which will fetch the 
> data from
> a source (I am using Hibernate framework to fetch the data) and 
> evaluate the
> data using Drools rule engine. The rules supplied to the Drools rule 
> engine
> are stored in a Rules table in a database.
>
> Now my question is that can I use Guvnor to store the rules (instead of me
> creating a rule data model) and use Guvnor to supply rules to my Drools
> engine?
>
> I am trying to find out the best possible way to create / manage a rule
> database (which stores all the rules).
>
> Thanks,
> BB
> -- 
> View this message in context: 
> http://drools-java-rules-engine.46999.n3.nabble.com/Drools-with-Guvnor-tp830453p830453.html
> Sent from the Drools - User mailing list archive at Nabble.com.
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