Workflows: Enumeration in BPMN Pathway without DMN possible? Which Expression needed?

Modeling
1

I have an exclusive gateway in an approval situation but the possible results are more than just true/false. They are approved/declined/needs re-editing. The user should consciously make a decision which is the accurate one as all three lead a different process step. This is a mandatory field. So I chose an enumeration for it.

I thought a DMN is a bit of an overkill. I modelled the exclusive gateway with 3 paths and now need to set up the right expression on the paths.

In the tutorial and docu I only found either examples with booleans and then the process variable turning to true or false or the usage of a DMN.

So my process variable is called TECApproval and the values it can have (user selects exclusively one of them) is approved, declined or re-edit.

So would {#DocumentModelName.Groupname.TECApproval ==“Approved”} be the right expression for the approved-path etc?

Or do I need a DMN if I have more than two paths?

Thanks and cheers

Sarah

2

Hi Sarah,

You don’t need DMN. The exclusive gateway can have an arbitrary number of outgoing edges.

Your expression looks (almost) fine, just make sure the # is in front:

#{DocumentModelName.Groupname.TECApproval=="Approved"}

Best,
Peter

P.S.: The syntax Camunda uses here is JUEL (Java Unified Expression Language), here are some additional examples: Unified Expression Language - The Java EE 5 Tutorial