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Re: [grouper-dev] changelog implementation sketch

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  • From: Tom Barton <>
  • To: Grouper Dev <>
  • Subject: Re: [grouper-dev] changelog implementation sketch
  • Date: Fri, 06 Jun 2008 11:15:40 -0500

GW Brown, Information Systems and Computing wrote:
I think a change to a subjectId is needed for audit, but should be
transparent to notification. Only grouper needs to know about such a
change - presumably if the change has impact in other parts of a site's
IAM operation, they'll make corresponding updates using tools other than
their group management system.
There is interest in using notifications to prompt provisioning of changed objects. In effect the membership of one or more groups are likely to have changed and would need to be re-provisioned.

I'm not sure I'm following. There's a mapping between subjectId and memberId in the grouper_member table. MemberIds belong to groups, essentially. When a group membership is being reported, synchronized, etc, by a grouper API caller, each member's memberId is used to determine its subjectId, and the subject API is used to fetch and display or use subject attributes in context.

So, although it's true that a change in subjectId might indeed result in a change in how that Subject's memberships are represented in contexts outside of grouper, it doesn't cause a change to how the Subject's memberships are represented inside grouper.

I'd like to assume that if, for example, a site uses loginIds as subjectIds, and they make a change to someone's loginId, they'll reflect that change everywhere they can think of, including in group representations outside of grouper. They'll also notify grouper about the change. I'm still not seeing the dependence between notifying grouper of that change and implementing that change in other systems.

Guess I'm just having one of those (increasingly frequent) dense days. Sorry! :-)

fn:Tom Barton
org:University of Chicago;Networking Services & Information Technology
adr;dom:1155 E. 60th St.;;Rm 309, 1155 Bldg;Chicago;IL;60637
title:Sr. Director - Integration
tel;work:+1 773 834 1700

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