On 29 November 2012 12:59, Hushen Savani <hushen.savani@elitecore.com> wrote:

Hi Team,

            I'm a newbie to Drools. Please help me here.

1. I have created a Package named "org.sample".

2. I have created a Model named "TestModel" in the same package.

3. I have created a Fact named "Number" in the same Model.

4. "Number" fact is as following:

5. Then I have created a category named "TestCategory".

6. Then created a sample Rule named "ruletest" in that category.

7. Rule is created as following:

rule "numberone is equal to numbertwo"

            when

                        n : Number(numberone == numbertwo);

            then

                        n.setMessage("numberone is equal to numbertwo");

end

rule "numberone is greater than numbertwo"

            when

                        n : Number(numberone > numbertwo);

            then

                        n.setMessage("numberone is greater than numbertwo");

end

rule "numberone is less than numbertwo"

            when

                        n : Number(numberone < numbertwo);

            then

                        n.setMessage("numberone is less than numbertwo");

end

8. Built the package and created the snapshot.

9. Wrote a JAVA POJO client as following:

package org.sample;

import org.drools.RuleBase;

import org.drools.WorkingMemory;

import org.drools.agent.RuleAgent;

import org.drools.definition.type.FactType;

public class DroolGuvnor {

      public static void main(String[] args) throws InstantiationException, IllegalAccessException {

            RuleAgent ruleAgent = RuleAgent.newRuleAgent("/Guvnor.properties");

            RuleBase ruleBase = ruleAgent.getRuleBase();



            FactType factType = ruleBase.getFactType("org.sample.Number");

            Object obj = factType.newInstance();



            factType.set(obj, "numberone", 2);

            factType.set(obj, "numbertwo", 1);



            WorkingMemory workingMemory = ruleBase.newStatefulSession();

            workingMemory.insert(obj);

            workingMemory.fireAllRules();



            System.out.println(factType.get(obj, "message"));

      }

}

10. The "guvnor.properties" file is as following:

url=http://localhost:10080/guvnor-5.5.0.Final-tomcat-6.0/org.drools.guvnor.Guvnor/package/org.sample/TestSnapshot

enableBasicAuthentication=true

username=admin

password=admin

name=drooltest

11. But, when I run the client, I get following exception:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".

SLF4J: Defaulting to no-operation (NOP) logger implementation

SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

Exception in thread "main" java.lang.ClassCastException: [Lorg.drools.rule.Package; cannot be cast to org.drools.rule.Package

      at org.drools.agent.HttpClientImpl.fetchPackage(HttpClientImpl.java:86)

      at org.drools.agent.URLScanner.readPackage(URLScanner.java:171)

      at org.drools.agent.URLScanner.getChangeSet(URLScanner.java:143)

      at org.drools.agent.URLScanner.loadPackageChanges(URLScanner.java:119)

      at org.drools.agent.RuleAgent.checkForChanges(RuleAgent.java:431)

      at org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:383)

      at org.drools.agent.RuleAgent.configure(RuleAgent.java:368)

      at org.drools.agent.RuleAgent.init(RuleAgent.java:268)

      at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:208)

      at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:168)

      at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:277)

      at org.sample.DroolGuvnor.main(DroolGuvnor.java:10)

Please help on this. Thanks.

Best Regards,

Hushen Savani

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