Multiple transitions from a subprocess

[oravecz]

I have a sub-process in my process definition, and it can end in one of three end states, success, failure, and denied. The documentation seems to allude to the fact that this is possible:

In case a sub process node is allowed more than one leaving transition, a mechanism has to be introduced to select a leaving transition. This selection can be based on either the sub process execution's variables or the end state of the sub process (a typical state machine can have multiple end states).

So, how does one actually convert an end-state in a sub-process to a transition in the super-process?

Thanks,
Jim

[oravecz]

I have seen the other posts on the forum where the use of transient variables are used to accomplish this task, but does the documentation allude to something new that may be built in to the engine?

[kukeltje]

where in the docs is this? (I'm lazy ;-) )

[oravecz]

Wow, you are lazy! :)

http://docs.jboss.com/jbpm/v3.2/userguide/html_single/#processcompositioningop

[kukeltje]

Ah... ok, after reading the docs, I understand what was meant (it's kind of hypothetical)

JPDL ,afaik, only allows one leaving transition from a sub-process node. What you can do is have multiple end-states in the sup-process and set a variable to a value to indicate which end-state it is in. Copy that value back to the super process and use a decision node after the sub-process node to take a specific transition

[oravecz]

Maybe the docs aren't very clear here, but the quote from the documentation seems to imply two possible ways of handling this. Your explanation takes care of the first way.

This selection can be based on either the sub process execution's variables..

The or clause continues:

or the end state of the sub process (a typical state machine can have multiple end states).

If the only possibility was to use execution variables, it seems they would of left this last part of the sentence off. Of course, I suppose we will have to check out the code if the authors don't weigh in first.