--- /dev/null
+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.hosttracker;
+
+import org.opendaylight.controller.hosttracker.hostAware.HostNodeConnector;
+
+/**
+ * This Interface defines the methods for client applications of Host Tracker to
+ * get notifications when a new host is learned or existing host is removed from
+ * the network.
+ *
+ */
+public interface IfNewHostNotify {
+ /**
+ * Notifies the HostTracker Clients that a new Host has been learned
+ *
+ * @param host
+ * Host Info encapsulated in HostNodeConnector class
+ */
+ public void notifyHTClient(HostNodeConnector host);
+
+ /**
+ * Notifies the HostTracker Clients that a Host which was learned in the
+ * past has been removed either due to switch/port down event or due to ARP
+ * Aging
+ *
+ * @param host
+ * Host Info encapsulated in HostNodeConnector class
+ */
+ public void notifyHTClientHostRemoved(HostNodeConnector host);
+}