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How to create a Activiti Multiinstance Task programmatically

tschiela

Hello,

i try to create a multiinstance workflow programmatically.

I got these BPMN xml that works fine:

<userTask id="multiTask" name="Review task ${loopCounter}" activiti:assignee="${reviewer}">
  <multiInstanceLoopCharacteristics isSequential="false" activiti:collection="reviewersList" activiti:elementVariable="reviewer">
    <completionCondition>${nrOfCompletedInstances > maxReviewer }</completionCondition>        
  </multiInstanceLoopCharacteristics>
</userTask>‍‍‍‍‍‍

How i can do these with pure Java?
I started with these:

MultiInstanceLoopCharacteristics loopChar = new MultiInstanceLoopCharacteristics();   ‍

but i dont know how to go on.

Greets Thomas

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Comments

tschiela

Ok, now i know how to set the inputDataItem. But how i can set the LoopDataInputRef?

<br>Property value = new Property();<br>value.setName("reviewer");<br>loopChar.setInputDataItem(value);<br>

ronald_van_kuij

Why do you want this? What is the goal?

tschiela

We need a adhoc modelling component like in kickstart. At the moment its possible to generate simple workflows with parallel tasks like in kickstart. But we need also a multiInstance-Task to modell "review"-tasks on the fly.

So we importet the kickstart packages to convert the workflow dto to xml and deploy it to the server. All works fine, except the multiinstance-task. The problem here is that kickstart use a xml-element "loopDataInput" inside of "multiInstanceLoopCharacteristics"-Element, but activiti uses "loopDataInputRef".

greets Thomas

ronald_van_kuij

Ok, will have to think about it…

classic example of 'first describe the goal, then the step' : http://catb.org/~esr/faqs/smart-questions.html#goal

tschiela

Ok, i got a quick and dirty solution. I just renamed the attribute loopDataInput to loopDataInputRef in MultiInstanceLoopCharacteristics class of the kickstart BPMN 2.0 xml Model.

naag

Instead of generating the task programmatically via Activiti internal Java APIs (which can change anytime and aren't supposed to be used anyway), why don't you use the other main Activiti "API", namely BPMN 2.0 XML?

Wouldn't that be possible? 🙂

bernd_ruecker

Yeah, sounds more reasonable for me as well: create the BPMN 2.0 XML programatically: You could easily use a Java API for this, we described that in a tutorial: https://app.camunda.com/confluence/display/foxUserGuide/Java+API+to+read+and+write+BPMN+2.0+XML+Intro. Send me a mail if you want to read it, I can do a PDF export as this tutorial is limited to enterprise support customers…

Cheers
Bernd