topic How to get process instance variables on event ACTIVITY_START in Alfresco Archive

How to get process instance variables on event ACTIVITY_START

cdeneux — Wed, 20 May 2015 08:55:18 GMT

Hi all,I use an event listener on event ACTIVITY_START to detect when a service task starts. In my event listener implementation, I query Activiti engine to get variables of the associated process instance. This works fine only if, in my process definition, a user task exists between the start event

Re: How to get process instance variables on event ACTIVITY_START

martin_grofcik — Thu, 21 May 2015 07:51:57 GMT

Hi Christophe,

make the first service task asynchronous.

Regards
Martin

Re: How to get process instance variables on event ACTIVITY_START

cdeneux — Tue, 26 May 2015 14:19:17 GMT

Hi Martin,

Thanks for your reply. Adding <code>activiti:async="true"</code> on the service task works fine but I think it is not usable in my particular use case.
I'm embedding Activiti engine into a component to be deployed on Petals ESB infrastructure to provide a process/service convergence to our users. Our users will develop their process definition or service orchestrations and deploy them into our Activiti component. So, it is not conceivable for us to force our users to set <code>activiti:async="true"</code> in few cases to work around a technical issue. In a conceptual point of view, all services invoked by a process instance should be processed with the same manner.
So, except if another solution exists, I will investigate a contribution to include the process instance variables to the event.

Regards,
Christophe

Re: How to get process instance variables on event ACTIVITY_START

jbarrez — Tue, 02 Jun 2015 19:02:09 GMT

One way do solve this is to have a BpmnParseHandler that automatically sets async to true for your service tasks.

Re: How to get process instance variables on event ACTIVITY_START

cdeneux — Mon, 08 Jun 2015 10:09:14 GMT

Thanks Joram, that works fine.

I use your example CustomUserTaskBpmnParseHandler available into the Activiti user documentation as a post BpmnParseHandler.

Regards,
Christophe