topic Re: Exclusive Gateway on multiple items in Alfresco Archive

Exclusive Gateway on multiple items

yisa — Sun, 30 Nov 2014 05:56:55 GMT

Hi, I'm new to building workflow and is trying to figure out how to model below process using loop. The workflow is operated on a batch of items, however, evaluation in between needs to be done on individual item. I don't know how to evaluate each item using a loop. 1. Start Event -> 2. Java Serv

Re: Exclusive Gateway on multiple items

martin_grofcik — Mon, 01 Dec 2014 07:58:45 GMT

Hi,

Use multi-instance
http://www.activiti.org/userguide/#bpmnMultiInstance

Regards
Martin

Re: Exclusive Gateway on multiple items

yisa — Mon, 01 Dec 2014 20:40:41 GMT

Thanks for the reply. I have used multi-instance, but that's not the problem. Let me clarify my problem.

My workflow contains mostly tasks that processes multiple items in a batch mode (step 2, 3, 5,6), but condition evaluation at exclusive gateway can only evaluate one item at a time (step 4 and 7). Since I can't use multi-instance on exclusive gateway alone, seems like I have to put each exclusive gateway into a separated process just to use multi instance, then merge result back to continue in batch mode, like the following:

1 –> 2(batch) –> 3(batch) –> 4(new_process_to_check_condition) –> 5(batch) –> 6(batch) –> 7(another new_process_to_check)

That means every time when I have a condition to check, I need to create a new process so that I can loop through the items. Doesn't seem like an efficient way to model. So am I missing something?

Does this make sense?

Re: Exclusive Gateway on multiple items

martin_grofcik — Mon, 01 Dec 2014 21:07:50 GMT

Hi,

You could evaluate the condition in the script/service tasks to evaluate result (loop through items ; condition evaluation & setting result to the process variable). That could be one way. Another possibility is to implement bean to evaluate condition (http://www.activiti.org/userguide/#springintegration).

Regards
Martin

Re: Exclusive Gateway on multiple items

yisa — Tue, 02 Dec 2014 00:08:21 GMT

Thanks for the quick reply! I'll try to use a service task then.