applications/topology-lldp-discovery/src/main/java/org/opendaylight/openflowplugin/applications/topology/lldp/LLDPLinkAger.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.openflowplugin.applications.topology.lldp;
   9
  10 import com.google.common.annotations.VisibleForTesting;
  11 import java.util.Date;
  12 import java.util.Map;
  13 import java.util.Map.Entry;
  14 import java.util.Optional;
  15 import java.util.Timer;
  16 import java.util.TimerTask;
  17 import java.util.concurrent.ConcurrentHashMap;
  18 import javax.annotation.Nonnull;
  19 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  20 import org.opendaylight.openflowplugin.api.openflow.configuration.ConfigurationListener;
  21 import org.opendaylight.openflowplugin.api.openflow.configuration.ConfigurationService;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.LinkDiscovered;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.LinkRemovedBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.lldp.discovery.config.rev160511.TopologyLldpDiscoveryConfig;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 public class LLDPLinkAger implements ConfigurationListener, AutoCloseable {
  29     private static final Logger LOG = LoggerFactory.getLogger(LLDPLinkAger.class);
  30     private final long linkExpirationTime;
  31     private final Map<LinkDiscovered, Date> linkToDate;
  32     private final Timer timer;
  33     private final NotificationProviderService notificationService;
  34     private final AutoCloseable configurationServiceRegistration;
  35
  36     /**
  37      * default ctor - start timer
  38      */
  39     public LLDPLinkAger(final TopologyLldpDiscoveryConfig topologyLldpDiscoveryConfig,
  40                         final NotificationProviderService notificationService,
  41                         final ConfigurationService configurationService) {
  42         this.linkExpirationTime = topologyLldpDiscoveryConfig.getTopologyLldpExpirationInterval().getValue();
  43         this.notificationService = notificationService;
  44         this.configurationServiceRegistration = configurationService.registerListener(this);
  45         linkToDate = new ConcurrentHashMap<>();
  46         timer = new Timer();
  47         timer.schedule(new LLDPAgingTask(), 0, topologyLldpDiscoveryConfig.getTopologyLldpInterval().getValue());
  48     }
  49
  50     public void put(LinkDiscovered link) {
  51         Date expires = new Date();
  52         expires.setTime(expires.getTime() + linkExpirationTime);
  53         linkToDate.put(link, expires);
  54     }
  55
  56     @Override
  57     public void close() throws Exception {
  58         timer.cancel();
  59         linkToDate.clear();
  60         configurationServiceRegistration.close();
  61     }
  62
  63     private class LLDPAgingTask extends TimerTask {
  64
  65         @Override
  66         public void run() {
  67             for (Entry<LinkDiscovered,Date> entry : linkToDate.entrySet()) {
  68                 LinkDiscovered link = entry.getKey();
  69                 Date expires = entry.getValue();
  70                 Date now = new Date();
  71                 if(now.after(expires)) {
  72                     if (notificationService != null) {
  73                         LinkRemovedBuilder lrb = new LinkRemovedBuilder(link);
  74                         notificationService.publish(lrb.build());
  75                         linkToDate.remove(link);
  76                     }
  77                 }
  78             }
  79
  80         }
  81
  82     }
  83
  84     @VisibleForTesting
  85     public boolean isLinkToDateEmpty() {
  86         return linkToDate.isEmpty();
  87     }
  88
  89     @Override
  90     public void onPropertyChanged(@Nonnull final String propertyName, @Nonnull final String propertyValue) {
  91         Optional.ofNullable(TopologyLLDPDiscoveryProperty.forValue(propertyName)).ifPresent(lldpDiscoveryProperty -> {
  92             switch (lldpDiscoveryProperty) {
  93                 case LLDP_SECURE_KEY:
  94                     LOG.warn("Runtime update not supported for property {}", lldpDiscoveryProperty);
  95                     break;
  96                 case TOPOLOGY_LLDP_INTERVAL:
  97                     LOG.warn("Runtime update not supported for property {}", lldpDiscoveryProperty);
  98                     break;
  99                 case TOPOLOGY_LLDP_EXPIRATION_INTERVAL:
 100                     LOG.warn("Runtime update not supported for property {}", lldpDiscoveryProperty);
 101                     break;
 102                 default:
 103                     LOG.warn("No topology lldp discovery property found.");
 104                     break;
 105             }
 106         });
 107     }
 108 }