topic Re: ErrorBoundaryEvent on Task in Alfresco Archive

ErrorBoundaryEvent on Task

tim_vandeplas — Wed, 21 Sep 2011 13:53:45 GMT

Hello,Is it possible to add an ErrorBoundaryEvent on a simple Task (e.g. a Java Service Task)? If not are there plans to add it in the near future?Regards,Tim

Re: ErrorBoundaryEvent on Task

trademak — Thu, 22 Sep 2011 07:13:40 GMT

Hi,

Yes it's possible. But the question would be, what do you want to do with it?
Because the boundary error event will not catch any Java exceptions.

Best regards,

Re: ErrorBoundaryEvent on Task

tim_vandeplas — Thu, 22 Sep 2011 08:44:49 GMT

I would like to add some error flows, e.g adding a HumanTask after a communications error.
I know that it won't catch Java Exceptions, but our code could catch the given exception and trigger an error event.

I also had a look at the "Handling exceptions" section of the document, we would basically like to do the same but without extending ActivityBehavior and by using the "ErrorBoundaryEvent" to clearly indicate that it's an error flow.

The problem is that I don't know how to trigger the ErrorBoundaryEvent.

Regards,

Tim

Re: ErrorBoundaryEvent on Task

trademak — Thu, 22 Sep 2011 10:32:52 GMT

Hi,

Okay. It's not easy to trigger the ErrorBoundaryEvent.
If you want to implement the logic you described I would stick with choosing the sequence flow from the Java code based on the exception being thrown or not.

Best regards,

Re: ErrorBoundaryEvent on Task

ronald_van_kuij — Thu, 22 Sep 2011 10:38:43 GMT

If you want to implement the logic you described I would stick with choosing the sequence flow from the Java code based on the exception being thrown or not.

Thought it works, it more and more starts to feel like a 'hack' since you need to have sequence flow names in sync with the java code… And as another poster reported, choosing an explicit sequence flow from a task is against spec, each flow should be taken (but maybe limited to ones where a condition is met.

And as this topic mentions, an error event is also something very visual, and business level. So I'll see what I can come up with in the comming weeks since this just seems something we want to have.

Re: ErrorBoundaryEvent on Task

trademak — Thu, 22 Sep 2011 11:41:11 GMT

Hi Ronald,

Sure you're right. If you can come up with something that would be great of course.

Best regards,

Re: ErrorBoundaryEvent on Task

tim_vandeplas — Thu, 22 Sep 2011 13:24:20 GMT

That would indeed be great.

Thank you.

Re: ErrorBoundaryEvent on Task

ronald_van_kuij — Thu, 22 Sep 2011 22:55:23 GMT

Don't get your hopes up to high. I'm way overdue with some other things that I want to pick up now the tennis season is almost over (well, down to 1 time per week)

Re: ErrorBoundaryEvent on Task

butl — Wed, 28 Sep 2011 10:59:45 GMT

We are facing the same issue here.

In the meantime, maybe could you tell me where I have to look to implement it on my own.
I would be willing to share my findings with the community.

Thank you very much in advance.

Best regards,
butl