elanmanager/impl/src/main/java/org/opendaylight/netvirt/elan/l2gw/utils/L2GatewayConnectionUtils.java

   1 /*
   2  * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. 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
   9 package org.opendaylight.netvirt.elan.l2gw.utils;
  10
  11 import static java.util.Collections.emptyMap;
  12 import static org.opendaylight.netvirt.elan.utils.ElanUtils.isVxlanNetworkOrVxlanSegment;
  13
  14 import com.google.common.collect.Lists;
  15 import com.google.common.util.concurrent.FluentFuture;
  16 import com.google.common.util.concurrent.FutureCallback;
  17 import com.google.common.util.concurrent.Futures;
  18 import com.google.common.util.concurrent.MoreExecutors;
  19 import com.google.common.util.concurrent.SettableFuture;
  20 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  21 import java.util.ArrayList;
  22 import java.util.List;
  23 import java.util.Objects;
  24 import java.util.Optional;
  25 import java.util.Set;
  26 import java.util.concurrent.CopyOnWriteArrayList;
  27 import java.util.concurrent.ExecutionException;
  28 import javax.annotation.PreDestroy;
  29 import javax.inject.Inject;
  30 import javax.inject.Singleton;
  31 import org.eclipse.jdt.annotation.NonNull;
  32 import org.eclipse.jdt.annotation.Nullable;
  33 import org.opendaylight.genius.datastoreutils.SingleTransactionDataBroker;
  34 import org.opendaylight.genius.utils.hwvtep.HwvtepSouthboundUtils;
  35 import org.opendaylight.infrautils.jobcoordinator.JobCoordinator;
  36 import org.opendaylight.mdsal.binding.api.DataBroker;
  37 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  38 import org.opendaylight.netvirt.elan.cache.ElanInstanceCache;
  39 import org.opendaylight.netvirt.elan.l2gw.jobs.AssociateHwvtepToElanJob;
  40 import org.opendaylight.netvirt.elan.l2gw.jobs.DisAssociateHwvtepFromElanJob;
  41 import org.opendaylight.netvirt.elan.l2gw.listeners.LocalUcastMacListener;
  42 import org.opendaylight.netvirt.elan.utils.ElanClusterUtils;
  43 import org.opendaylight.netvirt.elan.utils.Scheduler;
  44 import org.opendaylight.netvirt.elanmanager.utils.ElanL2GwCacheUtils;
  45 import org.opendaylight.netvirt.neutronvpn.api.l2gw.L2GatewayCache;
  46 import org.opendaylight.netvirt.neutronvpn.api.l2gw.L2GatewayDevice;
  47 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.instances.ElanInstance;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.attributes.Devices;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.connections.attributes.L2gatewayConnections;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.connections.attributes.l2gatewayconnections.L2gatewayConnection;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateways.attributes.L2gateways;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateways.attributes.l2gateways.L2gateway;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateways.attributes.l2gateways.L2gatewayKey;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepGlobalAugmentation;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.LocalUcastMacs;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.LogicalSwitches;
  59 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  60 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  61 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  62 import org.slf4j.Logger;
  63 import org.slf4j.LoggerFactory;
  64
  65 @Singleton
  66 public class L2GatewayConnectionUtils implements AutoCloseable {
  67     private static final Logger LOG = LoggerFactory.getLogger(L2GatewayConnectionUtils.class);
  68
  69     private final DataBroker broker;
  70     private final ElanL2GatewayUtils elanL2GatewayUtils;
  71     private final ElanClusterUtils elanClusterUtils;
  72     private final ElanL2GatewayMulticastUtils elanL2GatewayMulticastUtils;
  73     private final ElanL2GatewayBcGroupUtils elanL2GatewayBcGroupUtils;
  74     private final Scheduler scheduler;
  75     private final JobCoordinator jobCoordinator;
  76     private final L2GatewayCache l2GatewayCache;
  77     private final ElanInstanceCache elanInstanceCache;
  78     private final List<AutoCloseable> closeables = new CopyOnWriteArrayList<>();
  79     private final LocalUcastMacListener localUcastMacListener;
  80
  81     @Inject
  82     public L2GatewayConnectionUtils(DataBroker dataBroker,
  83                                     ElanClusterUtils elanClusterUtils, ElanL2GatewayUtils elanL2GatewayUtils,
  84                                     JobCoordinator jobCoordinator,
  85                                     ElanL2GatewayMulticastUtils elanL2GatewayMulticastUtils,
  86                                     ElanL2GatewayBcGroupUtils elanL2GatewayBcGroupUtils, Scheduler scheduler,
  87                                     L2GatewayCache l2GatewayCache,
  88                                     ElanInstanceCache elanInstanceCache,
  89                                     LocalUcastMacListener localUcastMacListener) {
  90         this.broker = dataBroker;
  91         this.elanL2GatewayUtils = elanL2GatewayUtils;
  92         this.elanClusterUtils = elanClusterUtils;
  93         this.elanL2GatewayMulticastUtils = elanL2GatewayMulticastUtils;
  94         this.elanL2GatewayBcGroupUtils = elanL2GatewayBcGroupUtils;
  95         this.scheduler = scheduler;
  96         this.jobCoordinator = jobCoordinator;
  97         this.l2GatewayCache = l2GatewayCache;
  98         this.elanInstanceCache = elanInstanceCache;
  99         this.localUcastMacListener = localUcastMacListener;
 100     }
 101
 102     @Override
 103     @PreDestroy
 104     @SuppressWarnings("checkstyle:IllegalCatch")
 105     public void close() {
 106         closeables.forEach(c -> {
 107             try {
 108                 c.close();
 109             } catch (Exception e) {
 110                 LOG.warn("Error closing {}", c, e);
 111             }
 112         });
 113     }
 114
 115     public static boolean isGatewayAssociatedToL2Device(L2GatewayDevice l2GwDevice) {
 116         return !l2GwDevice.getHwvtepNodeId().isEmpty();
 117     }
 118
 119     @Nullable
 120     public static L2gateway getNeutronL2gateway(DataBroker broker, Uuid l2GatewayId) {
 121         if (l2GatewayId != null) {
 122             LOG.debug("getNeutronL2gateway for {}", l2GatewayId.getValue());
 123             InstanceIdentifier<L2gateway> inst = InstanceIdentifier.create(Neutron.class).child(L2gateways.class)
 124                     .child(L2gateway.class, new L2gatewayKey(l2GatewayId));
 125             try {
 126                 return SingleTransactionDataBroker
 127                     .syncReadOptional(broker, LogicalDatastoreType.CONFIGURATION, inst)
 128                     .orElse(null);
 129             } catch (ExecutionException | InterruptedException e) {
 130                 LOG.error("getNeutronL2gateway: Exception while reading L2gateway DS for the ID {}", l2GatewayId, e);
 131             }
 132             return null;
 133         }
 134
 135         return null;
 136     }
 137
 138     @NonNull
 139     public static List<L2gateway> getL2gatewayList(DataBroker broker) {
 140         InstanceIdentifier<L2gateways> inst = InstanceIdentifier.create(Neutron.class).child(L2gateways.class);
 141         try {
 142             return new ArrayList<>((SingleTransactionDataBroker.syncReadOptional(broker,
 143                     LogicalDatastoreType.CONFIGURATION, inst).map(L2gateways::nonnullL2gateway)
 144                     .orElse(emptyMap())).values());
 145         } catch (ExecutionException | InterruptedException e) {
 146             LOG.error("getNeutronL2gateway: Exception while reading L2gateway DS", e);
 147         }
 148         return null;
 149     }
 150
 151     @NonNull
 152     public static List<L2gatewayConnection> getAllL2gatewayConnections(DataBroker broker) {
 153         InstanceIdentifier<L2gatewayConnections> inst = InstanceIdentifier.create(Neutron.class)
 154                 .child(L2gatewayConnections.class);
 155         try {
 156             return new ArrayList<>((SingleTransactionDataBroker.syncReadOptional(broker,
 157                     LogicalDatastoreType.CONFIGURATION, inst).map(L2gatewayConnections::nonnullL2gatewayConnection)
 158                     .orElse(emptyMap())).values());
 159         } catch (ExecutionException | InterruptedException e) {
 160             LOG.error("getNeutronL2gateway: Exception while reading L2gateway DS", e);
 161         }
 162         return null;
 163     }
 164
 165     /**
 166      * Gets the associated l2 gw connections.
 167      *
 168      * @param broker
 169      *            the broker
 170      * @param l2GatewayIds
 171      *            the l2 gateway ids
 172      * @return the associated l2 gw connections
 173      */
 174     @NonNull
 175     public static List<L2gatewayConnection> getAssociatedL2GwConnections(DataBroker broker, Set<Uuid> l2GatewayIds) {
 176         List<L2gatewayConnection> allL2GwConns = getAllL2gatewayConnections(broker);
 177         List<L2gatewayConnection> l2GwConnections = new ArrayList<>();
 178         for (Uuid l2GatewayId : l2GatewayIds) {
 179             for (L2gatewayConnection l2GwConn : allL2GwConns) {
 180                 if (l2GwConn.getL2gatewayId() != null) {
 181                     if (Objects.equals(l2GwConn.getL2gatewayId(), l2GatewayId)) {
 182                         l2GwConnections.add(l2GwConn);
 183                     }
 184                 }
 185                 else {
 186                     LOG.warn("No l2gatewayId for l2gatewayconnection {} ", l2GwConn.key().getUuid());
 187                 }
 188
 189             }
 190         }
 191         return l2GwConnections;
 192     }
 193
 194     /**
 195      * Gets the associated l2 gw connections.
 196      *
 197      * @param broker
 198      *            the broker
 199      * @param elanName
 200      *            the elan Name
 201      * @return the associated l2 gw connection with elan
 202      */
 203     @NonNull
 204     public static List<L2gatewayConnection> getL2GwConnectionsByElanName(DataBroker broker, String elanName) {
 205         List<L2gatewayConnection> allL2GwConns = getAllL2gatewayConnections(broker);
 206         List<L2gatewayConnection> elanL2GateWayConnections = new ArrayList<>();
 207         for (L2gatewayConnection l2GwConn : allL2GwConns) {
 208             if (l2GwConn.getNetworkId().getValue().equalsIgnoreCase(elanName)) {
 209                 elanL2GateWayConnections.add(l2GwConn);
 210             }
 211         }
 212         return elanL2GateWayConnections;
 213     }
 214
 215     public void addL2GatewayConnection(L2gatewayConnection input) {
 216         addL2GatewayConnection(input, null/*deviceName*/, null);
 217     }
 218
 219     public void addL2GatewayConnection(final L2gatewayConnection input,
 220                                        final String l2GwDeviceName) {
 221         addL2GatewayConnection(input, l2GwDeviceName, null);
 222     }
 223
 224     public void addL2GatewayConnection(final L2gatewayConnection input,
 225                                        @Nullable final String l2GwDeviceName ,
 226                                        @Nullable L2gateway l2Gateway) {
 227         LOG.info("Adding L2gateway Connection:{} vlan: {} device name {}",
 228             input.key().getUuid(), input.getSegmentId(), l2GwDeviceName);
 229
 230         Uuid networkUuid = input.getNetworkId();
 231
 232         // Taking cluster reboot scenario , if Elan instance is not available when l2GatewayConnection add events
 233         // comes we need to wait for elaninstance to resolve. Hence updating the map with the runnable .
 234         // When elanInstance add comes , it look in to the map and run the associated runnable associated with it.
 235         ElanInstance elanInstance = elanInstanceCache.get(networkUuid.getValue(),
 236             () -> addL2GatewayConnection(input, l2GwDeviceName)).orElse(null);
 237         if (elanInstance == null) {
 238             return;
 239         }
 240
 241         if (!isVxlanNetworkOrVxlanSegment(elanInstance)) {
 242             LOG.error("Neutron network with id {} is not VxlanNetwork", networkUuid.getValue());
 243         } else {
 244             Uuid l2GatewayId = input.getL2gatewayId();
 245             if (l2Gateway == null) {
 246                 l2Gateway = getNeutronL2gateway(broker, l2GatewayId);
 247             }
 248             if (l2Gateway == null) {
 249                 LOG.error("L2Gateway with id {} is not present", l2GatewayId);
 250             } else {
 251                 associateHwvtepsToElan(elanInstance, l2Gateway, input, l2GwDeviceName);
 252             }
 253         }
 254     }
 255
 256     public void deleteL2GatewayConnection(L2gatewayConnection input) {
 257         LOG.info("Deleting L2gateway Connection with ID: {} vlan : {}",
 258             input.key().getUuid(), input.getSegmentId());
 259
 260         Uuid networkUuid = input.getNetworkId();
 261         String elanName = networkUuid.getValue();
 262         disAssociateHwvtepsFromElan(elanName, input);
 263     }
 264
 265     private void disAssociateHwvtepsFromElan(String elanName, L2gatewayConnection input) {
 266         Integer defaultVlan = input.getSegmentId();
 267         List<L2GatewayDevice> l2Devices = ElanL2GwCacheUtils.getAllElanDevicesFromCache();
 268         List<Devices> l2gwDevicesToBeDeleted = new ArrayList<>();
 269         for (L2GatewayDevice elanL2gwDevice : l2Devices) {
 270             if (elanL2gwDevice.getL2GatewayIds().contains(input.key().getUuid())) {
 271                 l2gwDevicesToBeDeleted.addAll(elanL2gwDevice.getDevicesForL2gwConnectionId(input.key().getUuid()));
 272             }
 273         }
 274         if (l2gwDevicesToBeDeleted.isEmpty()) {
 275             //delete logical switch
 276             Uuid l2GatewayId = input.getL2gatewayId();
 277             L2gateway l2Gateway = L2GatewayConnectionUtils.getNeutronL2gateway(broker, l2GatewayId);
 278             if (l2Gateway == null) {
 279                 LOG.error("Failed to find the l2gateway for the connection {}", input.getUuid());
 280                 return;
 281             } else if (l2Gateway.nonnullDevices() != null) {
 282                 l2gwDevicesToBeDeleted.addAll(l2Gateway.nonnullDevices().values());
 283             }
 284         }
 285         for (Devices l2Device : l2gwDevicesToBeDeleted) {
 286             String l2DeviceName = l2Device.getDeviceName();
 287             L2GatewayDevice l2GatewayDevice = l2GatewayCache.get(l2DeviceName);
 288             String hwvtepNodeId = l2GatewayDevice.getHwvtepNodeId();
 289             if (hwvtepNodeId == null) {
 290                 LOG.error("Could not disassociate failed to get node id {}", l2DeviceName);
 291                 continue;
 292             }
 293             boolean isLastL2GwConnDeleted = false;
 294             L2GatewayDevice elanL2GwDevice = ElanL2GwCacheUtils.getL2GatewayDeviceFromCache(elanName, hwvtepNodeId);
 295             if (elanL2GwDevice != null && isLastL2GwConnBeingDeleted(elanL2GwDevice)) {
 296                 // Delete L2 Gateway device from 'ElanL2GwDevice' cache
 297                 LOG.debug("Elan L2Gw Conn cache removed for id {}", hwvtepNodeId);
 298                 ElanL2GwCacheUtils.removeL2GatewayDeviceFromCache(elanName, hwvtepNodeId);
 299                 isLastL2GwConnDeleted = true;
 300             } else {
 301                 Uuid l2GwConnId = input.key().getUuid();
 302                 LOG.debug("Elan L2Gw Conn cache with id {} is being referred by other L2Gw Conns; so only "
 303                         + "L2 Gw Conn {} reference is removed", hwvtepNodeId, l2GwConnId);
 304                 if (elanL2GwDevice != null) {
 305                     elanL2GwDevice.removeL2GatewayId(l2GwConnId);
 306                 } else {
 307                     isLastL2GwConnDeleted = true;
 308                 }
 309             }
 310
 311             DisAssociateHwvtepFromElanJob disAssociateHwvtepToElanJob =
 312                     new DisAssociateHwvtepFromElanJob(elanL2GatewayUtils, elanL2GatewayMulticastUtils,
 313                             elanL2GatewayBcGroupUtils, elanClusterUtils, scheduler, jobCoordinator,
 314                             elanL2GwDevice, elanName, l2Device, defaultVlan, hwvtepNodeId, isLastL2GwConnDeleted);
 315             elanClusterUtils.runOnlyInOwnerNode(disAssociateHwvtepToElanJob.getJobKey(), "remove l2gw connection job",
 316                     disAssociateHwvtepToElanJob);
 317         }
 318     }
 319
 320     private void associateHwvtepsToElan(ElanInstance elanInstance,
 321             L2gateway l2Gateway, L2gatewayConnection input, String l2GwDeviceName) {
 322         String elanName = elanInstance.getElanInstanceName();
 323         Integer defaultVlan = input.getSegmentId();
 324         Uuid l2GwConnId = input.key().getUuid();
 325         List<Devices> l2Devices =  new ArrayList<>(l2Gateway.nonnullDevices().values());
 326
 327         LOG.trace("Associating ELAN {} with L2Gw Conn Id {} having below L2Gw devices {}", elanName, l2GwConnId,
 328                 l2Devices);
 329
 330         for (Devices l2Device : l2Devices) {
 331             String l2DeviceName = l2Device.getDeviceName();
 332             // L2gateway can have more than one L2 Gw devices. Configure Logical Switch, VLAN mappings,...
 333             // only on the switch which has come up just now and exclude all other devices from
 334             // preprovisioning/re-provisioning
 335             if (l2GwDeviceName != null && !l2GwDeviceName.equals(l2DeviceName)) {
 336                 LOG.debug("Associating Hwvtep to ELAN is not been processed for {}; as only {} got connected now!",
 337                         l2DeviceName, l2GwDeviceName);
 338                 continue;
 339             }
 340             L2GatewayDevice l2GatewayDevice = l2GatewayCache.get(l2DeviceName);
 341             if (isL2GwDeviceConnected(l2GatewayDevice)) {
 342                 NodeId hwvtepNodeId = new NodeId(l2GatewayDevice.getHwvtepNodeId());
 343
 344                 // Delete pending delete logical switch task if scheduled
 345                 elanL2GatewayUtils.cancelDeleteLogicalSwitch(hwvtepNodeId,
 346                         ElanL2GatewayUtils.getLogicalSwitchFromElan(elanName));
 347
 348                 // Add L2 Gateway device to 'ElanL2GwDevice' cache
 349                 addL2DeviceToElanL2GwCache(elanName, l2GatewayDevice, l2GwConnId, l2Device);
 350                 AssociateHwvtepToElanJob associateHwvtepToElanJob = new AssociateHwvtepToElanJob(broker,
 351                         elanL2GatewayUtils, elanL2GatewayMulticastUtils, elanL2GatewayBcGroupUtils,
 352                         l2GatewayDevice, elanInstance, l2Device, defaultVlan);
 353
 354                 elanClusterUtils.runOnlyInOwnerNode(associateHwvtepToElanJob.getJobKey(),
 355                         "create logical switch in hwvtep topo", associateHwvtepToElanJob);
 356
 357             } else {
 358                 LOG.error("L2GwConn create is not handled for device with id {} as it's not connected {}",
 359                         l2DeviceName, input);
 360             }
 361         }
 362     }
 363
 364     public L2GatewayDevice addL2DeviceToElanL2GwCache(String elanName, L2GatewayDevice l2GatewayDevice, Uuid l2GwConnId,
 365             Devices l2Device) {
 366         String l2gwDeviceNodeId = l2GatewayDevice.getHwvtepNodeId();
 367         L2GatewayDevice elanL2GwDevice = ElanL2GwCacheUtils.getL2GatewayDeviceFromCache(elanName, l2gwDeviceNodeId);
 368         if (elanL2GwDevice == null) {
 369             elanL2GwDevice = new L2GatewayDevice(l2GatewayDevice.getDeviceName());
 370             elanL2GwDevice.setHwvtepNodeId(l2gwDeviceNodeId);
 371             elanL2GwDevice.setTunnelIps(l2GatewayDevice.getTunnelIps());
 372             ElanL2GwCacheUtils.addL2GatewayDeviceToCache(elanName, elanL2GwDevice);
 373             LOG.debug("Elan L2GwConn cache created for hwvtep id {}", l2gwDeviceNodeId);
 374         } else {
 375             LOG.debug("Elan L2GwConn cache already exists for hwvtep id {}; updating L2GwConn id {} to it",
 376                     l2gwDeviceNodeId, l2GwConnId);
 377         }
 378         elanL2GwDevice.addL2GatewayId(l2GwConnId);
 379         elanL2GwDevice.addL2gwConnectionIdToDevice(l2GwConnId, l2Device);
 380
 381         //incase of cluster reboot scenario southbound device would have added more macs
 382         //while odl is down, pull them now
 383         readAndCopyLocalUcastMacsToCache(elanName, l2GatewayDevice);
 384
 385         LOG.info("Elan L2GwConn cache updated with below details: {}", elanL2GwDevice);
 386         return elanL2GwDevice;
 387     }
 388
 389     private static boolean isL2GwDeviceConnected(L2GatewayDevice l2GwDevice) {
 390         return l2GwDevice != null && l2GwDevice.getHwvtepNodeId() != null;
 391     }
 392
 393     protected static boolean isLastL2GwConnBeingDeleted(@NonNull L2GatewayDevice l2GwDevice) {
 394         return l2GwDevice.getL2GatewayIds().size() == 1;
 395     }
 396
 397     private void readAndCopyLocalUcastMacsToCache(final String elanName, final L2GatewayDevice l2GatewayDevice) {
 398         final InstanceIdentifier<Node> nodeIid = HwvtepSouthboundUtils.createInstanceIdentifier(
 399                 new NodeId(l2GatewayDevice.getHwvtepNodeId()));
 400         jobCoordinator.enqueueJob(elanName + ":" + l2GatewayDevice.getDeviceName(), () -> {
 401             final SettableFuture settableFuture = SettableFuture.create();
 402             FluentFuture<Optional<Node>> fluentFuture = broker.newReadOnlyTransaction().read(
 403                 LogicalDatastoreType.OPERATIONAL, nodeIid);
 404             Futures.addCallback(fluentFuture, new FutureCallback<Optional<Node>>() {
 405                     @Override
 406                     public void onSuccess(@NonNull Optional<Node> resultNode) {
 407                         Optional<Node> nodeOptional = resultNode;
 408                         if (nodeOptional.isPresent()) {
 409                             Node node = nodeOptional.get();
 410                             if (node.augmentation(HwvtepGlobalAugmentation.class) != null) {
 411                                 List<LocalUcastMacs> localUcastMacs = new ArrayList<>(
 412                                         node.augmentation(HwvtepGlobalAugmentation.class)
 413                                             .nonnullLocalUcastMacs().values());
 414                                 if (localUcastMacs == null) {
 415                                     return;
 416                                 }
 417                                 localUcastMacs.stream()
 418                                         .filter(mac -> macBelongsToLogicalSwitch(mac, elanName))
 419                                         .forEach(mac -> {
 420                                             InstanceIdentifier<LocalUcastMacs> macIid = getMacIid(nodeIid, mac);
 421                                             localUcastMacListener.added(macIid, mac);
 422                                         });
 423                             }
 424                         }
 425                     }
 426
 427                     @Override
 428                     public void onFailure(Throwable throwable) {
 429                     }
 430                 }, MoreExecutors.directExecutor());
 431             return Lists.newArrayList(fluentFuture);
 432         });
 433     }
 434
 435     /**
 436      * Gets the associated l2 gw connections.
 437      *
 438      * @param l2GatewayId the l2 gateway id
 439      *
 440      * @return the associated l2 gw connections
 441      */
 442     public List<L2gatewayConnection> getL2GwConnectionsByL2GatewayId(Uuid l2GatewayId) {
 443         List<L2gatewayConnection> l2GwConnections = new ArrayList<>();
 444         List<L2gatewayConnection> allL2GwConns = getAllL2gatewayConnections(broker);
 445         for (L2gatewayConnection l2GwConn : allL2GwConns) {
 446             if (l2GwConn.getL2gatewayId() != null &&  Objects.equals(l2GwConn.getL2gatewayId(), l2GatewayId)) {
 447                 l2GwConnections.add(l2GwConn);
 448             }
 449         }
 450         return l2GwConnections;
 451     }
 452
 453     @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
 454             justification = "https://github.com/spotbugs/spotbugs/issues/811")
 455     private static boolean macBelongsToLogicalSwitch(LocalUcastMacs mac, String logicalSwitchName) {
 456         InstanceIdentifier<LogicalSwitches> iid = (InstanceIdentifier<LogicalSwitches>)
 457                 mac.getLogicalSwitchRef().getValue();
 458         return iid.firstKeyOf(LogicalSwitches.class).getHwvtepNodeName().getValue().equals(logicalSwitchName);
 459     }
 460
 461     static InstanceIdentifier<LocalUcastMacs> getMacIid(InstanceIdentifier<Node> nodeIid, LocalUcastMacs mac) {
 462         return nodeIid.augmentation(HwvtepGlobalAugmentation.class).child(LocalUcastMacs.class, mac.key());
 463     }
 464 }