topic Re: Identifying Predecessors in Alfresco Archive

Identifying Predecessors

se040 — Fri, 15 Mar 2013 21:21:10 GMT

Hi all,I want to know if there is a way (i know there is no way in the API of the engine atm) to identify the type and id of the predecessor of a task, knowing the process instance and task id of course.I am glad for any help.Regards,Stefan

Re: Identifying Predecessors

se040 — Fri, 15 Mar 2013 22:21:04 GMT

OK after a bit exploring i found a kind of solution by using BpmnParse-Class.

For whom it may interest: I just had to "fake" a Deployment to make it work. Just create a new BPMN-Parse like this:

new BpmnParse = new BpmnParse(new BpmnParser(new ExpressionManager(), new DefaultBpmnParseFactory()))

When using in Tests or elsewhere also make sure that Context.getProcessEngineConfiguration is not null. I first used the Parse in a JUnit Test with an Activity Rule and got a NullPointer. So i just set the Configuration with the static setter.

Now I can at least identify possible predecessors and successors, but by checking active tasks before and after completion the new created follow-ups can be identified (ok, not if you have parallel multi-instance sub processes but I dont have them) =D

Re: Identifying Predecessors

jbarrez — Mon, 18 Mar 2013 15:44:36 GMT

Another path you could take is to fetch the BpmnModel representation of the process definition. There you can easily traverse the different steps in the process in a pojo way.