Problems with result mapping for custom workitems
by 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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