[rules-users] Problems with result mapping for custom workitems

[PAYET, Manuel]

Hello everyone, I have a problem using result mapping in custom workitems when I try to set an attribute of an object as one of the result:
I make the following mapping in Result Mapping of my workitem:

Parameter     Variable
message       workmodel.message


and all I have is 

Could not find variable scope for variable workmodel.message
when trying to complete Work Item workitem_test
Continuing without setting variable.


I hope, someone can help me, I tried all that I could think about...
you will find below all my project, sorry for the long post...:



/forum/src/main/java/mpayet/test/forum/App.java
=======================================================================
package mpayet.test.forum;

import java.util.HashMap;
import java.util.Map;

import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderError;
import org.drools.builder.KnowledgeBuilderErrors;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;

import workDefinitions.WorkitemTest;
import workDefinitions.Workmodel;

/**
 * Hello world!
 * 
 */
public class App {
	public static void main(String[] args) throws Exception {
		System.out.println("Hello World!");
		KnowledgeBase kbase = readKnowledgeBase();
		StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();
		final Map<String, Object> map = new HashMap<String, Object>();
		map.put("workmodel", new Workmodel());
		session.getWorkItemManager().registerWorkItemHandler("workitem_test", new WorkitemTest(session));
		session.startProcess("flow", map);
	}

	private static KnowledgeBase readKnowledgeBase() throws Exception {

		final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory
				.newKnowledgeBuilder();
		kbuilder.add(ResourceFactory.newClassPathResource("flow.rf"),
				ResourceType.DRF);

		KnowledgeBuilderErrors errors = kbuilder.getErrors();
		if (errors.size() > 0) {
			for (KnowledgeBuilderError error : errors) {
				System.err.println(error);
			}
			throw new IllegalArgumentException("Could not parse knowledge.");
		}
		KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
		kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());

		return kbase;
	}
}
=======================================================================




/forum/src/main/java/workDefinitions/WorkitemTest.java
=======================================================================
package workDefinitions;

import java.util.HashMap;
import java.util.Map;

import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.process.WorkItem;
import org.drools.runtime.process.WorkItemHandler;
import org.drools.runtime.process.WorkItemManager;

public class WorkitemTest implements WorkItemHandler {

	final StatefulKnowledgeSession session;

	public WorkitemTest(final StatefulKnowledgeSession session) {
		this.session = session;
	}

	public void abortWorkItem(WorkItem workItem, WorkItemManager manager) {

	}

	public void executeWorkItem(WorkItem workItem, WorkItemManager manager) {

		final Map<String, Object> mapResult = new HashMap<String, Object>();
		mapResult.put("message", "message");
		mapResult.put("nombre", 1);
		manager.completeWorkItem(workItem.getId(), mapResult);
	}
}
=======================================================================





/forum/src/main/java/workDefinitions/Workmodel.java
=======================================================================
package workDefinitions;

public class Workmodel {
	private String message;

	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}

}
=======================================================================





/forum/src/main/java/META-INF/DefinitionsWorkitem.conf
=======================================================================
import org.drools.process.core.datatype.impl.type.StringDataType;
import org.drools.process.core.datatype.impl.type.IntegerDataType;

[
  // exemple de workitem
  [
    "name" : "workitem_test",
    "parameters" : [
      "typeObjet" : new StringDataType(),
      "nombre" : new IntegerDataType()
    ],
    "displayName" : "workitem test",
    "icon" : "icons/icone_service.gif"
  ]

]
=======================================================================





/forum/src/main/java/flow.rf
=======================================================================
<?xml version="1.0" encoding="UTF-8"?> 
<process xmlns="http://drools.org/drools-5.0/process"
         xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"
         xs:schemaLocation="http://drools.org/drools-5.0/process drools-processes-5.0.xsd"
         type="RuleFlow" name="flow" id="flow" package-name="com.mpayet.test" routerLayout="1" >

  <header>
    <imports>
      <import name="workDefinitions.Workmodel" />
    </imports>
    <variables>
      <variable name="workmodel" >
        <type name="org.drools.process.core.datatype.impl.type.ObjectDataType" className="workDefinitions.Workmodel" />
      </variable>
    </variables>
  </header>

  <nodes>
    <actionNode id="13" name="affichage variable" x="16" y="176" width="161" height="48" >
        <action type="expression" dialect="mvel" >var model =(Workmodel)context.getVariable("workmodel")
System.out.println(model.message)</action>
    </actionNode>
    <end id="8" name="End" x="72" y="256" width="48" height="48" />
    <start id="1" name="Start" x="72" y="16" width="48" height="48" />
    <workItem id="20" name="workitem test" x="46" y="97" width="100" height="48" >
      <work name="workitem_test" >
        <parameter name="nombre" >
          <type name="org.drools.process.core.datatype.impl.type.IntegerDataType" />
        </parameter>
        <parameter name="typeObjet" >
          <type name="org.drools.process.core.datatype.impl.type.StringDataType" />
        </parameter>
      </work>
      <mapping type="out" from="message" to="workmodel.message" />
    </workItem>
  </nodes>

  <connections>
    <connection from="20" to="13" />
    <connection from="13" to="8" />
    <connection from="1" to="20" />
  </connections>

</process>
=====================================================================



Thank you very much if you took the time to think about my problem,
Manuel PAYET






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