* Register admin event listener to listen for instance addition
* deletion and update event
*/
private void registerAdminEventListener() {
EventListener action = new DCUIClusterChangeEventListener();
ClusterChangeEventListener clusterChangeEventListener =
new ClusterChangeEventListenerImpl(clusterName, action);
AdminEventListenerRegistry.registerEventListener(
ClusterChangeEvent.eventType, clusterChangeEventListener,
ClusterChangeEventListener.class);
}