@Override
    public void initialize(XMPPServer server) {
        super.initialize(server);
        routingTable = server.getRoutingTable();
        componentCache = CacheFactory.createCache( COMPONENT_CACHE_NAME );
        ClusterManager.addListener( this );
    }
Holds the domain of the server. We are using an iv since we use this value many times
in many methods.
xmppserver/src/main/java/org/jivesoftware/openfire/component/InternalComponentManager.java