Help needed : Implementing AND/OR model for Activity Acceptance and Closing.

Hi Everybody,

My team is evaluating Shark to create an Emergency Handling system. We 
have integrated Shark as an Enterprise Application, where shark is being 
used as a library being called from a set of stateless session 
beans(EJBs). 

But one of the requirements from our client needs implementing the 
following schenario:

Say, I have a user group UG1, comprising of users U1,U2,U3. In a Process 
Definition, we assign one activty, say A1, to the group UG1. While 
creating the XPDL, we need to specify whether the type of assignment is of 
type AND/OR. We could do this by introducing one new Extended Attribute 
(say, "ModeOfAssignment"). The rule is as follows:
1. Irrespective of the mode (AND/OR), the assignments for activity 
A1should be made to all the users (U1, U2 and U3).
2. If the mode is "AND", then if say, U1 accepts it first, the assignments 
appearing in the worklist of U2 and U3 doesnot disappear. Also the system 
doesnot change the state to OPEN_AND_RUNNING until each of the users from 
the group (U1, U2 and U3) accepts their respective assignment. The same is 
valid for completing the assignments and changing state to 
CLOSED_AND_COMPLETED.
3. If the mode is "OR", then if say, U1 accepts it first, the assignments 
appearing in the worklist of U2 and U3 should disappear. Also the system 
changes the state to OPEN_AND_RUNNING immediately (just like the current 
implementation in Shark). 

I suppose implementing this has nothing to do with Assignment Manager, 
because assignments should be made simply as the Standard Assignment 
Manager behaves. Am I wrong?

Where should I change ideally, to implement this feature?

Regards,

Sukanta Bose
Senior Software Engineer,
SkyTECH Solutions Private Limited
Kolkata, India.
Phone: 91-33-2357-5441 (Extn: 2521)
Mobile: 9830254655

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