private void sendMessageToAdminsIfEnabled(final String message) {
        final Boolean enabled = ENABLED.getValue();
        LOGGER.info("Sending message to admins: {} (enabled={})", message, enabled);
        if (enabled) {
            xmppServer.sendMessageToAdmins(message);
        }
    }
Monitors the state of the cluster, and warns admins when nodes leave or rejoin the cluster
xmppserver/src/main/java/org/jivesoftware/openfire/cluster/ClusterMonitor.java