2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.md.controller.topology.lldp;
10 import java.util.Date;
12 import java.util.Timer;
13 import java.util.Map.Entry;
14 import java.util.TimerTask;
15 import java.util.concurrent.ConcurrentHashMap;
17 import org.opendaylight.md.controller.topology.lldp.utils.LLDPDiscoveryUtils;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.LinkDiscovered;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.LinkRemovedBuilder;
22 public class LLDPLinkAger {
23 private static final LLDPLinkAger instance = new LLDPLinkAger();
24 private Map<LinkDiscovered,Date> linkToDate = new ConcurrentHashMap<LinkDiscovered,Date>();
25 private LLDPDiscoveryProvider manager;
26 private Timer timer = new Timer();
28 public LLDPDiscoveryProvider getManager() {
31 public void setManager(LLDPDiscoveryProvider manager) {
32 this.manager = manager;
34 private LLDPLinkAger() {
35 timer.schedule(new LLDPAgingTask(), 0,LLDPDiscoveryUtils.LLDP_INTERVAL);
37 public static LLDPLinkAger getInstance() {
41 public void put(LinkDiscovered link) {
42 Date expires = new Date();
43 expires.setTime(expires.getTime() + LLDPDiscoveryUtils.LLDP_EXPIRATION_TIME);
44 linkToDate.put(link, expires);
51 private class LLDPAgingTask extends TimerTask {
55 for (Entry<LinkDiscovered,Date> entry : linkToDate.entrySet()) {
56 LinkDiscovered link = entry.getKey();
57 Date expires = entry.getValue();
58 Date now = new Date();
59 if(now.after(expires)) {
60 if(getInstance().getManager() != null) {
61 LinkRemovedBuilder lrb = new LinkRemovedBuilder(link);
62 getInstance().getManager().getNotificationService().publish(lrb.build());
63 linkToDate.remove(link);