Modifying a workflow instance in flight

[kamleshkr]

I would like to modify an instance of a workflow (not the workflow definition) on the fly by adding/removing task nodes in JBPM.
Ex if there is a workflow definition with nodes A-> B-> C-> D and there are 10 instances running, is it possible to change one of these instances a-> b-> c-> d by adding a new task node like a-> b-> b1-> c-> c1-> d.
Let me know if this is at all possible in JBPM.

[kukeltje]

yes, possible by using the underlying api. But it might cause problems when you screw up your definition/instance

[kamleshkr]

Hi Ronald,

Thanks for your quick response (as expected :) )

Can you please tell me how can I achieve this? Which API I can use for implementing this functionality?

[kukeltje]

In the sourcecode of jBPM are a lot of testcases where you can see how you can create a processdefinition from java and also how you can manipulate existing ones. There is also a 'command' for updating developed by Bernd Ruckner from Camunda, see also http://www.bpm-guide.de/2008/10/16/jbpm-deployer-for-jbpm-in-enterprise-environments/

If you had a look and have more specific questions, let us know