First of all, thank you very much for your reply! After your reply (thanks for the inspiration), I modifed my bpmn file, replacing the first converging parallel gateway with the converging "exclusive" gateway. See the attached bpmn file. After the changing, the loop worked!  So, the process has the converging exclusive gateway followed by the diverging exclusive gateway. Now, I think it is obvious.

BTW, do have a suggestion for my question #1 (Subprocess looptype attribute from the Eclipse BPMN 2 Process Editor)?

Thanks,

bwj

=========================

processTest2.java

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

import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.compiler.BPMN2ProcessFactory;
import org.drools.compiler.ProcessBuilderFactory;
import org.drools.impl.EnvironmentFactory;
import org.drools.io.ResourceFactory;
import org.drools.logger.KnowledgeRuntimeLogger;
import org.drools.logger.KnowledgeRuntimeLoggerFactory;
import org.drools.marshalling.impl.ProcessMarshallerFactory;
import org.drools.runtime.KnowledgeSessionConfiguration;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.process.ProcessRuntimeFactory;
import org.jbpm.bpmn2.BPMN2ProcessProviderImpl;
import org.jbpm.marshalling.impl.ProcessMarshallerFactoryServiceImpl;
import org.jbpm.process.builder.ProcessBuilderFactoryServiceImpl;
import org.jbpm.process.instance.ProcessRuntimeFactoryServiceImpl;
import org.jbpm.process.workitem.wsht.WSHumanTaskHandler;

/**
* This is a sample file to launch a process.
*/
public class ProcessTest2 {

public static final void main(String[] args) {
  try {
   // load up the knowledge base
   KnowledgeBase kbase = readKnowledgeBase();
   StatefulKnowledgeSession ksession = createSession(kbase);
   KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "test");

   // start a new process instance
   Map<String, Object> params = new HashMap<String, Object>();
   params.put("count", 1);  
   ksession.startProcess("looptest777", params);
   logger.close();
  } catch (Throwable t) {
   t.printStackTrace();
  }
}

private static KnowledgeBase readKnowledgeBase() throws Exception {
  ProcessBuilderFactory.setProcessBuilderFactoryService(new ProcessBuilderFactoryServiceImpl());
  ProcessMarshallerFactory.setProcessMarshallerFactoryService(new ProcessMarshallerFactoryServiceImpl());
  ProcessRuntimeFactory.setProcessRuntimeFactoryService(new ProcessRuntimeFactoryServiceImpl());
  BPMN2ProcessFactory.setBPMN2ProcessProvider(new BPMN2ProcessProviderImpl());
  KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
  kbuilder.add(ResourceFactory.newClassPathResource("looptest777.bpmn"), ResourceType.BPMN2);
  return kbuilder.newKnowledgeBase();
}

private static StatefulKnowledgeSession createSession(KnowledgeBase kbase) {
  Properties properties = new Properties();
  properties.put("drools.processInstanceManagerFactory", "org.jbpm.process.instance.impl.DefaultProcessInstanceManagerFactory");
  properties.put("drools.processSignalManagerFactory", "org.jbpm.process.instance.event.DefaultSignalManagerFactory");
  KnowledgeSessionConfiguration config = KnowledgeBaseFactory.newKnowledgeSessionConfiguration(properties);
  return kbase.newStatefulKnowledgeSession(config, EnvironmentFactory.newEnvironment());
}
}

looptest777.bpmn

================

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

<definitions id="Definition"

targetNamespace="http://www.jboss.org/drools"

typeLanguage="http://www.java.com/javaTypes"

expressionLanguage="http://www.mvel.org/2.0"

xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.xsd"

xmlns:g="http://www.jboss.org/drools/flow/gpd"

xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"

xmlns:dc="http://www.omg.org/spec/DD/20100524/DC"

xmlns:di="http://www.omg.org/spec/DD/20100524/DI"

xmlns:tns="http://www.jboss.org/drools">

<itemDefinition id="_countItem" structureRef="Integer" />

<process processType="Private" isExecutable="true" id="looptest777" name="looptest777.b" >

<!-- process variables -->

<property id="count" itemSubjectRef="_countItem"/>

<!-- nodes -->

<startEvent id="_1" name="Start" />

<scriptTask id="_2" name="Hello" >

<script>System.out.println("Hello");

</script>

</scriptTask>

<scriptTask id="_4" name="Hello Again" >

<script>System.out.println("Hello Again");</script>

</scriptTask>

<exclusiveGateway id="_5" name="Gateway" gatewayDirection="Diverging" />

<endEvent id="_6" name="End" >

<terminateEventDefinition/>

</endEvent>

<scriptTask id="_7" name="Hello Back" >

<script>System.out.println("Hello back");

count += 1;

System.out.println("count: " + count);

kcontext.setVariable("count", count);

</script>

</scriptTask>

<scriptTask id="_8" name="Hello Post" >

<script>System.out.println("Hello Post");</script>

</scriptTask>

<exclusiveGateway id="_10" name="Gateway" gatewayDirection="Converging" />

<!-- connections -->

<sequenceFlow id="_1-_2" sourceRef="_1" targetRef="_2" />

<sequenceFlow id="_10-_4" sourceRef="_10" targetRef="_4" />

<sequenceFlow id="_4-_5" sourceRef="_4" targetRef="_5" />

<sequenceFlow id="_8-_6" sourceRef="_8" targetRef="_6" />

<sequenceFlow id="_5-_7" sourceRef="_5" targetRef="_7" name="loop back" >

<conditionExpression xsi:type="tFormalExpression" >return count &lt; 3;</conditionExpression>

</sequenceFlow>

<sequenceFlow id="_5-_8" sourceRef="_5" targetRef="_8" name="otherwise" >

<conditionExpression xsi:type="tFormalExpression" language="http://www.jboss.org/drools/rule" >eval(true)</conditionExpression>

</sequenceFlow>

<sequenceFlow id="_2-_10" sourceRef="_2" targetRef="_10" />

<sequenceFlow id="_7-_10" sourceRef="_7" targetRef="_10" />

</process>

<bpmndi:BPMNDiagram>

<bpmndi:BPMNPlane bpmnElement="looptest777" >

<bpmndi:BPMNShape bpmnElement="_1" >

<dc:Bounds x="27" y="150" width="48" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="_2" >

<dc:Bounds x="95" y="152" width="80" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="_4" >

<dc:Bounds x="286" y="205" width="80" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="_5" >

<dc:Bounds x="411" y="156" width="48" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="_6" >

<dc:Bounds x="609" y="152" width="48" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="_7" >

<dc:Bounds x="287" y="94" width="80" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="_8" >

<dc:Bounds x="492" y="156" width="80" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="_10" >

<dc:Bounds x="202" y="149" width="48" height="48" />

</bpmndi:BPMNShape>

<bpmndi:BPMNEdge bpmnElement="_1-_2" >

<di:waypoint x="51" y="174" />

<di:waypoint x="135" y="176" />

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="_10-_4" >

<di:waypoint x="226" y="173" />

<di:waypoint x="326" y="229" />

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="_4-_5" >

<di:waypoint x="326" y="229" />

<di:waypoint x="435" y="180" />

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="_8-_6" >

<di:waypoint x="532" y="180" />

<di:waypoint x="633" y="176" />

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="_5-_7" >

<di:waypoint x="435" y="180" />

<di:waypoint x="327" y="118" />

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="_5-_8" >

<di:waypoint x="435" y="180" />

<di:waypoint x="532" y="180" />

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="_2-_10" >

<di:waypoint x="135" y="176" />

<di:waypoint x="226" y="173" />

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="_7-_10" >

<di:waypoint x="327" y="118" />

<di:waypoint x="226" y="173" />

</bpmndi:BPMNEdge>

</bpmndi:BPMNPlane>

</bpmndi:BPMNDiagram>

</definitions>

Kris, thanks! I enjoyed the webinar last Thursday.

I know the MultipleInstances node can do looping, but to me, it depends on the input collection (size). I need a subprocess looping based on the "do until" or "while' condition. So, an acitivity inside of the subprocess returns a value, and based on the value, a gateway inside of the subprocess decides the looping.

Speaking of the MultipleInstances node, I think activities inside of the node can be executed parallely or sequentially. How do I set the behavior from the Eclipse BPMN 2 Editor? I saw the Guvnor Designer (Oryx-based) has a subprocess property field where I can change the behavior (but as you may know, I couldn't save any subprocess using the Guvnor designer for now - at the webinar, you told us your team is working on the designer with Intalio and I assueme the 5.1 release fixes the issue).

Thanks again for great work!!!

bwj

Hi bpmn2user,

Very nice! Thank you very much for your reply and blog! I just imported and tested your code. It worked. Using your method, I learned how to achieve the subprocess looping (do util, while) even though there seems to be no "built-in" (property-based) subprocess loop type from the Eclipse BPMN2 Editor. Until, the Eclipse BPMN2 designer conforms to the full BPMN 2, I can use your method.

Thanks again, your suggestion is very useful!!!

bwj