Grouper Developers Forum

[Colin Hudler <>]

On 06/24/2009 10:38 PM, Chris Hyzer wrote:
> Alright, let me re-explain:
>
> It is called whenever that method is called whenever a certain method is 
> called in the API.
>
> However, there might be other ways that a membership could be inserted.  If 
> you want to catch *every* insert, then do a preInsert.  If you want to catch 
> group.addMember(), then maybe membershipPreAddMember.  However, I don't know 
> which internal methods call the one which fires a membershipPreAddMember, and 
> which don't... maybe it should say:
>
> FROM: high level, not the side effects
> TO: high level, maybe not the side effects
>
> What are you trying to do?

This hook notifies a udp listener of membership changes.  The listener 
then takes action, in this case, updating an LDAP database.

I registered two hooks.

membershipPostCommitRemoveMember
membershipPostCommitAddMember

I could not easily predict when the hooks would fire, so it is their job 
to filter the event before notifying.  Please forgive this crude code 
fragment, but I think it illustrates what I am doing:

Set memberships = postCommitBeanThread.getMembershipEffectiveSaves();
memberships.addAll(postCommitBeanThread.getMembershipImmediateSaves());
Iterator memberator = memberships.iterator();
while (memberator.hasNext())  {
  Membership membership = (Membership) memberator.next();
  String listName = membership.getListName();
  if (!listName.equals("members")) { memberator.next(); continue; }
  // Proceed to process this event...


This works well so far.