How to excute execution or task listener if a process is canceled manually

Flowable Engine
1

Hi guys,

I have got a question regarding executing some java logic, if you cancel the process manually via task app.

For this reason lets have a look at the sample process. Every user task got task execution listeners at the create event, there will be a rest request for adding a notification to an external service. At the end event this notification will be disabled, also via rest request.

sample_process

Now the problem appears, if you are going to manually end the process for example via task app. If the user task A is currently not completed, the listener to disable the notification, won’t be executed so the notification remains active in the external service.

task_app-cancel_process_manually

Do someone of you maybe know how to handle this? So if I end the process manually, I have to execute at least some logic to call the external service and disable the notification.

Greetings,
Thomas

2

Hi Thomas,

Exactly as you wrote. The question is from where this logic could be executed.There are several possibilities so just 2 of them:

  1. add the logic to the rest endpoint which is called on the cancel process button.
  2. You can change process model and encapsulate user tasks A, B with subprocess. Add message/signal catch event to the subprocess and based on this event make compensation of the current state. There are dedicated Compensation Intermediate Throwing/catching Events to manage compensations (Open Source).

Regards
Martin

3

Hi Martin,

thank you for your fast reply. I will try your suggestions. :slight_smile:

Greetings,
Thomas