private void fireInvitationEvent(WorkgroupInvitation invitation) {
synchronized (invitationListeners) {
for (Iterator i = invitationListeners.iterator(); i.hasNext();) {
WorkgroupInvitationListener listener = (WorkgroupInvitationListener)i.next();
listener.invitationReceived(invitation);
}
}
}
private void fireQueueJoinedEvent() {