How to make multiinstance task choose in runtime what to call

[alper]

Hi,
I have a paralel multiinstance task which is suppose to call outer system or child workflow.

How to make each instance of this multitask choose what to call depending on the input parameter?

Thank you.

[pkonyves]

From the userguide. You can tell Activiti to take the elements from a collection, and assign that element to an (execution local) variable for that instance. For example your collection can hold a list of URLs, and each service task in the multi-instance will call one.

<code>
<userTask id="miTasks" name="My Task" activiti:assignee="${assignee}">
  <multiInstanceLoopCharacteristics isSequential="true"
     activiti:collection="${myService.resolveUsersForTask()}" activiti:elementVariable="assignee" >
  </multiInstanceLoopCharacteristics>
</userTask>
</code>

[alper]

I can do that.
What I am asking is that how to implement a kind of Switch? I mean, to call different workflows depending on the input parameter?

[pkonyves]

Maybe you can use EL expression in a call activiti to determine the called process' id
http://activiti.org/userguide/#bpmnCallActivity