How to configure multiple service tasks (for custom workitem handlers) inside a single process in bpmn (jbpm6)

Question

I am new to jbpm6. I was able to configure and run a single service task with Custom workitem handler. However, when i try to configure multiple service tasks within a single process, it doesn't work. Can somebody please help? Thanks in advance !

Below is my working code for a single service task.

    <itemDefinition id="_sItem" structureRef="String" />
    <itemDefinition id="_2_InMessageType" structureRef="java.lang.String" />
    <message id="_2_InMessage" itemRef="_2_InMessageType" />

    <interface id="_handlingServiceInterface" name="myService">
        <operation id="_handlingServiceOperation" name="">
            <inMessageRef>_2_InMessage</inMessageRef>
        </operation>
    </interface>

    <process id="SingleNode_Process" isExecutable="true"
        processType="Private" name="Service Process">
        <property id="s" itemSubjectRef="_2_InMessageType" />

        <startEvent id="start-state" name="Start" />

        <serviceTask id="node" name="myservice" implementation="Other"
            operationRef="_handlingServiceOperation">
        </serviceTask>

   <endEvent id="end-state" name="End">
            <terminateEventDefinition />
        </endEvent>

    <sequenceFlow id="flow_N1000C" sourceRef="start-state"
            targetRef="node" />
   <sequenceFlow id="flow_N10017" sourceRef="node"
            targetRef="end-state" />

    </process>




ProcessInstance processInstance = null;
        KieHelper kieHelper = new KieHelper();

        KieBase kbase = kieHelper.addResource(ResourceFactory
                    .newClassPathResource("test.bpmn"))
                    .build();

        KieSession ksession = kbase.newKieSession();

        try{
            ksession.getWorkItemManager().registerWorkItemHandler("Service Task",  new MyTaskHandler());
        }
        catch (Exception ex){
                System.err.println("WorkitemHandler==>"+ex.toString());
        }


        try{
            processInstance = ksession.startProcess("SingleNode_Process");
        }

        catch(WorkflowRuntimeException e){
            System.err.println("processInstance Exception ==>"+e.toString());

        }

        ksession.dispose();

I would like to have multiple servicetask pointing to different Custom WorkItemHandlers, above.

Answer 1

In this case you overrode the "Service Task" node. What you need to do is write a separate work item handler. The documentaion is here

Basic steps are:

1. Create a work item definition work item definition - wid
2. Create the java work item handler handler class
3. Drag and drop wid onto bpmn
4. Register handler (similar to what you did for "Service Task Above"), use string you used in wid definition: [ "name" : "