public static void subscribedToPresence(JID subscriberJID, JID authorizerJID) {
        if (!listeners.isEmpty()) {
            for (PresenceEventListener listener : listeners) {
                try {
                    listener.subscribedToPresence(subscriberJID, authorizerJID);   
                } catch (Exception e) {
                    Log.warn("An exception occurred while dispatching a 'subscribedToPresence' event!", e);
                }
            }
        }
    }
Notification message indicating that a user has successfully subscribed
to the presence of another user.

@param subscriberJID the user that initiated the subscription.
@param authorizerJID the user that authorized the subscription.
xmppserver/src/main/java/org/jivesoftware/openfire/user/PresenceEventDispatcher.java