topic Re: How to listen on boundary event firing / activity cancelled in Alfresco Archive

How to listen on boundary event firing / activity cancelled

rgielen — Fri, 30 Mar 2012 16:30:29 GMT

Hi,we have a requirement to use boundary timer events for some user tasks along with notifying an outside system in case a user task gets cancelled by the boundary event.First I was thinking that a COMPLETE event listener on the user task might do the trick, although I would have been worried about

Re: How to listen on boundary event firing / activity cancelled

ronald_van_kuij — Fri, 30 Mar 2012 16:35:25 GMT

Why not just have a service task after the boundary timer?

Re: How to listen on boundary event firing / activity cancelled

rgielen — Fri, 30 Mar 2012 16:51:43 GMT

That would of course technically work.

Nevertheless, the requirement for notification is a purely technical crosscutting concern on all boundary task definitions that will be executed within the outer system with Activiti embedded. The processes itself are true business domain processes, editable by the user (knowing nothing about technical foo, but about his business). Both cluttering process definitions with technically induced service tasks and requiring the user to not forget this seem not to be a feasible options in the end, I guess…

Thanks,
- René

Re: How to listen on boundary event firing / activity cancelled

meyerd — Tue, 03 Apr 2012 06:10:29 GMT

Hi rgielen,

note that you can also add Execution listeners to sequence flows. That might also be an option here.

Re: How to listen on boundary event firing / activity cancelled

sebastian_s — Tue, 03 Apr 2012 13:16:27 GMT

Today I faced exactly the same problem. The work-around proposed by Ronald is unfortunately not useful for me since adding additional tasks to the proess definition or changing the sequence flow in any way in general is not an option for me.

Furthermore I cannot use Daniel's work-around since I don't want to add listeners to the sequence flows since this makes the process definitions hard to maintain when process topology has to be changed due to a business requirement.

Re: How to listen on boundary event firing / activity cancelled

ronald_van_kuij — Tue, 03 Apr 2012 13:38:28 GMT

You can augment the BPMNParser and deploy time add them… Search the forum for hints/examples. I do not have these at hand

Re: How to listen on boundary event firing / activity cancelled

rgielen — Wed, 11 Apr 2012 14:06:13 GMT

Hi rgielen,

note that you can also add Execution listeners to sequence flows. That might also be an option here.

Hi Daniel,

thanks for your suggestion. To get around our current itches, we indeed implemented an execution listener for the timerActivity given in the parseBoundaryTimerEventDefinition hook of our parse listener. Thus we could emulate a user task interrupted / cancelled event behavior.

Nevertheless, IMO it would much cleaner to complete lifecycle event support for tasks, including a CANCEL event. Anyone with me on that topic?

Regards,
René

Re: How to listen on boundary event firing / activity cancelled

rgielen — Wed, 11 Apr 2012 14:08:06 GMT

You can augment the BPMNParser and deploy time add them… Search the forum for hints/examples. I do not have these at hand

For our use case we are using the ParseListener infrastructure anyway. That's where we are injecting our cross cutting behavior.

Regards,
René