Context

• On the process instance page
• In the process instance modification view
• When I move tokens on the diagram, so that it creates modification instructions

Current behavior:

• For every token,
  • a cancel instruction is generated by activity instance id
  • a start before instruction is generated

Improved behavior:

• For every token,
  • a cancel instruction is generated by activity instance id
  • a start before instruction is generated with the closest commen ancestor of the starting activity with the cancelling activity instance

Example:

• Consider the attached BPMN model
• Assume activity Inner is active with the following activity instances:

  ProcInst : 1
    Outer SubProcess: 2
      Inner SubProcess: 3
        Inner: 4
  

If I move the token from Inner to Outer, then the following instructions should be generated:

1. Start before Inner with ancestor Outer SubProcess: 2
2. Cancel Inner: 4

Outer SubProcess: 2 is the activity instance that is the closes ancestor of Inner: 4 and that runs the closest ancestor activity of Outer.

If we move multiple tokens, this logic should be applied to each one individually.