// notify all users of the shared node
Set<String> friends = new HashSet<String>();
friends.addAll(fileNode.getCalculatedUserList());
friends.remove(userId); // skip to notify myself
BaseNotificationMessageFactory messageFactory = new ShareFolderNotificationMessageFactory(sharedNode,
context.getUserPermission());
context.provideMessageFactory(messageFactory);
context.provideUsersToNotify(friends);
}