[rules-users] OptionalDataException while running sample mortagage example

[Aditya]

HI,



I had downloaded the drools 5.1 examples which is present in
http://www.jboss.org/drools/downloads.html url

and trying to run drools-examples-brms\ mortgage-example by following all
the steps listed in the how-to document But as RuleAgent is depricated I
changed it to KnowledgeAgent and used ChangeSet.xml to provide the URL and
authentication details

When I started running the application(FinalTest.java) I was getting the
followign error:
java.lang.RuntimeException: KnowledgeAgent exception while trying to
deserialize KnowledgeDefinitionsPackage  

      at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:664)

      at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:889)

      at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:704)

      at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:584)

      at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:185)

      at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:168)

      at FinalTest.main(FinalTest.java:25)

Caused by: java.io.OptionalDataException

      at java.io.ObjectInputStream.readObject0(Unknown Source)

      at java.io.ObjectInputStream.readObject(Unknown Source)

      at
org.drools.rule.JavaDialectRuntimeData.readExternal(JavaDialectRuntimeData.java:167)

 
The code used is as follows:
FinalTest.java:
/**
 * 
 */


import org.drools.KnowledgeBase;
import org.drools.agent.KnowledgeAgent;
import org.drools.agent.KnowledgeAgentFactory;
import org.drools.builder.ResourceType;
import org.drools.definition.type.FactType;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatelessKnowledgeSession;

/**
 * @author aditya.madhav.k
 *
 */
public class FinalTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws InstantiationException,
IllegalAccessException{
		// TODO Auto-generated method stub
		
		KnowledgeAgent ka = KnowledgeAgentFactory.newKnowledgeAgent("MyAgent"); 
       
ka.applyChangeSet(ResourceFactory.newClassPathResource("changeset.xml")); 
        KnowledgeBase kb = ka.getKnowledgeBase(); 
        FactType appType = kb.getFactType("mortgages", "LoanApplication"); 
        FactType incomeType = kb.getFactType("mortgages", "IncomeSource"); 

        Object application = appType.newInstance(); 
        Object income = incomeType.newInstance(); 

        appType.set(application, "amount", 25000); 
        appType.set(application, "deposit", 1500); 
        appType.set(application, "lengthYears", 20); 

        incomeType.set(income, "type", "Job"); 
        incomeType.set(income, "amount", 65000);     

        StatelessKnowledgeSession ks = kb.newStatelessKnowledgeSession(); 

        ks.execute( new Object[] {application, income} ); 

	}

}

and changeset.xml code is:

<?xml version="1.0" encoding="UTF-8" ?> 
- 
- 
   
  
  

If anyone knows a solution for this kindly share the same



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