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How to assign input CallActivity subprocess

arief

Hi,

I'm new to this BPM. May I know how to assign variable 'workOrderApproved' upon callActivity to subprocess 'inventoryRelease' ?

        <sequenceFlow id='flow4' sourceRef="workOrderApprovedDecision" targetRef="createInventoryRelease">
            <conditionExpression xsi:type="tFormalExpression">${workOrderApproved}</conditionExpression>
        </sequenceFlow>
        
        <callActivity id="createInventoryRelease" name="Inventory release" calledElement="inventoryRelease">‍‍‍‍‍‍

Thanks

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Comments

frederikherema1

Hi,

First solution is to add a service-task in between the sequenceflow and the call-activity:

<serviceTask id="setVarServiceTask"><br>&nbsp;&nbsp;&nbsp; activiti:expression="#{value}"<br>&nbsp;&nbsp;&nbsp; activiti:resultVariableName="workOrderApproved" />

If this is to intrusive (adding an element to set a simple variable) you can use an event-listener (which is available in activiti.5.0.rc1, released this monday). The example below will set the variable 'workOrderApproved' when the transition 'flow4' is taken.

<br><sequenceFlow id='flow4' sourceRef="workOrderApprovedDecision" targetRef="createInventoryRelease"><br>&nbsp;&nbsp;&nbsp; <conditionExpression xsi:type="tFormalExpression">${workOrderApproved}</conditionExpression><br>&nbsp;&nbsp;&nbsp; <extensionElements><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <activiti:listener expression="${execution.setVariable('workOrderApproved', value)}" /><br>&nbsp;&nbsp;&nbsp; </extensionElements><br></sequenceFlow><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br><callActivity id="createInventoryRelease" name="Inventory release" calledElement="inventoryRelease"><br>

For more info about the possibilities of expressions and eventllisteners, check out the userguide. This has some good info about this subject.

arief

hi, thanks for the reply.

if I change your code in ExecutionImpl.java

public PvmProcessInstance createSubProcessInstance(PvmProcessDefinition processDefinition) {<br>&nbsp;&nbsp;&nbsp; ExecutionImpl subProcessInstance = newExecution();<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; // manage bidirectional super-subprocess relation<br><br>&nbsp;&nbsp;&nbsp; subProcessInstance.setParent(this);//arief add this<br><br>&nbsp;&nbsp;&nbsp; subProcessInstance.setSuperExecution(this);<br>&nbsp;&nbsp;&nbsp; this.setSubProcessInstance(subProcessInstance);<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; // Initialize the new execution<br>&nbsp;&nbsp;&nbsp; subProcessInstance.setProcessDefinition((ProcessDefinitionImpl) processDefinition);<br>&nbsp;&nbsp;&nbsp; subProcessInstance.setProcessInstance(subProcessInstance);<br><br>&nbsp;&nbsp;&nbsp; return subProcessInstance;<br>&nbsp; }

by setting the subProcess's parent,
The subprocess will automatically get the variable from it's parent (if it can't find the variable in the process).
And I don't need to change or add something to the BPMN work flow.

Perhaps, my additional line of code above would solve other issue regarding 'execution.getParent() always return null' (i saw it on other thread).

in addition,

I commented out line 65 of AtomicOperationActivityEnd.java
<br>        //parentScopeExecution.setActivity(parentActivity);<br>This will solve nullPointer exception when subprocess end.

I don't know if changes I made would break the activiti, but so far it works for me. I'm happy

frederikherema1

I misunderstood your question. The example above is for a single process, not for passing of variables to subproces, my bad

tombaeyens

1) good point, we don't have data mapping capabilities yet in the process definition to specify transfer of data between super process and sub process : http://jira.codehaus.org/browse/ACT-354

2) if the setParent() is all that it takes to enable variable lookup, that would be cool. in theory it could work like that. but i would be surprised if there no side effect to setting the parent for that purpose. (e.g. i believe the isProcessInstance() is implemented as parent!=null)

would be nice if that feature makes it in. might take a couple of months for us to get to that feature. if you want it, file a jira feature request and vote for it.