How to configure a Multi Instance Task?

[dhoffer]

In my BPMN I have the output of a DMN which is mapped to a dmnResults variable which in my case contains List<Map<String, Object>>. I then route these to various Tasks via an exclusive gateway depending on the values in the DMN results. This was working fine before we changed to a List of Map<String, Object> results. So now each of the Tasks I want to make Multi-Instance to handle the case there could be multiple tasks for each Task.

But I’m not clear how to configure this in Camunda Modeler. Here are the Multi-Instance parameters, what do I use for each of these? (Which ones do I need?)

Loop Cardinality
Collection
Element Variable
Completion Condition

Note my exclusive gateway destination paths check the dmnResults list/map with a Groovy script to route to the correct Task.

I don’t think this matters but note that in each Task I generally perform a Java Delegate operation, just a different one per Task.

Note in my JavaDelegate I do need to be able to read the dmnResult map for that instance of the Task, how do I get that?

[aravindhrs]

@dhoffer you can refer the below post:

Start the subprocess parallel with values from paraent workflow

Completion condition is optional, it means if completion condition is not given, then all the multi instances are expected to complete in-order to execute the next activity in the process, so still that execution token will waits in the multi-instance activity until all the instances completes. When the completion condition satisfies, and if few multi instances are still active, then those instances are deleted and the process continues to execute further activities in the process. for more d…

Start the subprocess parallel with values from paraent workflow

@vemulabujji From your parent process, collect the results as list as you mentioned result list =[“PI”,“DV”,“SI”,“PA”] . After the service task create a multi-instance call activity to start the subprocesses in parallel as per the below model. lets say your result list variable is subProcessList=[“PI”,“DV”,“SI”,“PA”] and assign a element variable as subProcesskey to loop through the list elements and it will be assigned to the calledElement attribute of call activity. (refer the diagram) [ima…

For your reference: