Workflow finalizer / abort hook

[gabriel-farache]

Description

The way we currently to it is by updating the state via a graphQL mutation request sent to the DI so there is no known way to me to execute a state that is executed before aborting the workflow.

This would be nice to be able to set a finalizer / abort hook that is always executed when canceling the workflow: if the workflow already started some external execution or made some changes, it would be nice to be able to revert those.

Implementation ideas

No response

[gabriel-farache]

If the DELETE call that abort a workflow would throw an exception, then by configuring a global, or by state, onErrors catching the thrown exception would solve the issue:

"extensions" : [ {
      "extensionid": "global-onErrors",
      "onErrors": [{
         "errorRef" : "abort",
         "transition": "compensateState"
     }]
  ]

[fjtirado]

After discussing this issue further, I think we can automatically execute compesating states if the workflow is aborted by calling delete endpoint.