topic Re: Process end if sequenceflow condition is not true in Alfresco Archive

Process end if sequenceflow condition is not true

jlinderoth — Fri, 25 May 2012 15:00:46 GMT

Hi! I got a task fooBar with only one sequenceflow connected from it. The sequenceflow got a condition ${A==true}. My problem is when I complete the task and A is false. Then the task completes and the process ends. The behavior I wishes to have is that when A is false, I like it to stay on my task

Re: Process end if sequenceflow condition is not true

trademak — Fri, 25 May 2012 15:39:15 GMT

Hi,

In BPMN you would need to use an exclusive gateway that goes back to the task when the condition is false.
When you only have one outgoing sequence flow, the engine always takes that path independent if the condition is true or not.

Best regards,

Re: Process end if sequenceflow condition is not true

gutlez — Fri, 25 May 2012 17:29:00 GMT

Wouldn't this be the definition of a looped activity?

Loop this activity until condition is met

Re: Process end if sequenceflow condition is not true

ronald_van_kuij — Fri, 25 May 2012 17:34:01 GMT

Yep… Sound like a alid construct as well.

Re: Process end if sequenceflow condition is not true

jlinderoth — Tue, 29 May 2012 08:24:16 GMT

Thanks! Got it working now!

What I did was that a I put a exclusiv gateway as you said before my sequence flow with the condition, but without a sequence flow back to the former task. That way the process throws an exception that say there is no possible way out of the gateway and it goes back to its former task, without makeing any new task

Was this how you meant it?

Re: Process end if sequenceflow condition is not true

trademak — Tue, 29 May 2012 11:50:11 GMT

Hmm not really. BPMN doesn't have a way of not taking a sequence flow when the condition is not met.
So what I meant is that you should have a second sequence flow going back to the user task, so the old task is completed and a new one is created.
Would there be a problem in your use case when a new user task is created in stead of keeping the old one?

Best regards,