topic How can a multi-instance task read the inputDataItem? in Alfresco Archive

How can a multi-instance task read the inputDataItem?

wolpert — Thu, 29 Sep 2011 23:36:01 GMT

I have the following xml fragment in my business process… <callActivity id="digitizeVideo" name="DigitizeVideo" calledElement="SourceVideo"> <multiInstanceLoopCharacteristics isSequential="false"> <loopDataInputRef>assetsToDigitize</loopDataInputRef> <

Re: How can a multi-instance task read the inputDataItem?

trademak — Fri, 30 Sep 2011 07:17:28 GMT

Hi,

Hmm interesting. Did you look at the possibility to pass a process variable to the sub process using an in parameter on the call activity?
So like:

<extensionElements>
  <activiti:in source="assetsToDigitize" target="assetId" />
</extensionElements>

Best regards,

Re: How can a multi-instance task read the inputDataItem?

wolpert — Fri, 30 Sep 2011 16:12:47 GMT

My example isn't much different then the miParallelUserTasksBasedOnCollection test case… which is this:

<multiInstanceLoopCharacteristics isSequential="false">
        <loopDataInputRef>assigneeList</loopDataInputRef>
        <inputDataItem name="assignee" />
        <completionCondition>${nrOfCompletedInstances/nrOfInstances >= 0.6 }</completionCondition>
      </multiInstanceLoopCharacteristics>

In my case, it makes everything correct, and I see a variable in the database attached to an execution, but if I only have the task object itself, how can I access the variable set by the 'multiInstanceLoopCharacteristics'? I've tried task variables and variablesLocal, process instance variables and variablesLocal, and every other combination. I can try that other technique but is it doing anything different? From looking at the source code, I'm not sure it is.

Re: How can a multi-instance task read the inputDataItem?

wolpert — Fri, 30 Sep 2011 16:27:07 GMT

I'm trying the 'in' technique now. Though it seems that the variable should automatically be set, I'll see if this will work.

Re: How can a multi-instance task read the inputDataItem?

wolpert — Fri, 30 Sep 2011 16:58:39 GMT

It did work by using the activiti:in, but I had to use this format:

      <extensionElements>
        <activiti:in source="assetId" target="assetId"></activiti:in>
      </extensionElements>

I have no need to use activitiut in my case. I'm not sure I understand why this isn't default behavior of activiti, but I am happy I have a technique that works and supported by the eclipse designer.

Thanks.