Mutli Instance Activity Variable Names

Camunda 7 Topics Discussion & Questions
1

For the multiple instance activities, the following variables are created to control the instances:
nrOfInstances , nrOfActiveInstances , nrOfCompletedInstances and loopCounter.

Is there any mechanism for specifying the names of these variables? What would happen if user-defined variables were created with these same names? It might be nice to have these variables named in a manner where they are less likely to collide with user-defined variable names.

2

I don’t think it’s possible to specify custom names for these variables. Just know them and choose the othe names so that no name conflicts arise.

3

Hi @Stephen_Bucholtz,

the names are constants in the Java code of the engine: https://github.com/camunda/camunda-bpm-platform/blob/e573859c094bff126b86cffc2d0295068a7d8ad1/engine/src/main/java/org/camunda/bpm/engine/impl/bpmn/behavior/MultiInstanceActivityBehavior.java#L48-L54

From the comments are they defined by the BPMN 2,0 specification.

So, @fml2 comment is valid.

Hope this helps, Ingo