vpnmanager/impl/src/main/java/org/opendaylight/netvirt/vpnmanager/VpnInstanceListener.java

   1 /*
   2  * Copyright (c) 2015 - 2017 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 package org.opendaylight.netvirt.vpnmanager;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.util.concurrent.FutureCallback;
  12 import com.google.common.util.concurrent.Futures;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import com.google.common.util.concurrent.MoreExecutors;
  15 import java.math.BigInteger;
  16 import java.util.ArrayList;
  17 import java.util.Arrays;
  18 import java.util.Collections;
  19 import java.util.List;
  20 import java.util.concurrent.Callable;
  21 import java.util.concurrent.ExecutionException;
  22 import javax.annotation.PostConstruct;
  23 import javax.inject.Inject;
  24 import javax.inject.Singleton;
  25 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  26 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  27 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  28 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  29 import org.opendaylight.genius.datastoreutils.AsyncDataTreeChangeListenerBase;
  30 import org.opendaylight.genius.datastoreutils.SingleTransactionDataBroker;
  31 import org.opendaylight.genius.mdsalutil.FlowEntity;
  32 import org.opendaylight.genius.mdsalutil.InstructionInfo;
  33 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  34 import org.opendaylight.genius.mdsalutil.MatchInfo;
  35 import org.opendaylight.genius.mdsalutil.MetaDataUtil;
  36 import org.opendaylight.genius.mdsalutil.NWUtil;
  37 import org.opendaylight.genius.mdsalutil.NwConstants;
  38 import org.opendaylight.genius.mdsalutil.instructions.InstructionGotoTable;
  39 import org.opendaylight.genius.mdsalutil.instructions.InstructionWriteMetadata;
  40 import org.opendaylight.genius.mdsalutil.interfaces.IMdsalApiManager;
  41 import org.opendaylight.genius.mdsalutil.matches.MatchTunnelId;
  42 import org.opendaylight.genius.utils.SystemPropertyReader;
  43 import org.opendaylight.infrautils.jobcoordinator.JobCoordinator;
  44 import org.opendaylight.netvirt.fibmanager.api.IFibManager;
  45 import org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.VpnAfConfig;
  46 import org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.VpnInstances;
  47 import org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.vpn.af.config.VpnTargets;
  48 import org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.vpn.af.config.vpntargets.VpnTarget;
  49 import org.opendaylight.yang.gen.v1.urn.huawei.params.xml.ns.yang.l3vpn.rev140815.vpn.instances.VpnInstance;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdManagerService;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.ExternalTunnelList;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.external.tunnel.list.ExternalTunnel;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.DcGatewayIpList;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.dc.gateway.ip.list.DcGatewayIp;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.id.to.vpn.instance.VpnIds;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.VpnInstanceOpDataEntry;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.VpnInstanceOpDataEntryBuilder;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.vpn.instance.op.data.entry.VpnTargetsBuilder;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.vpn.instance.op.data.entry.vpntargets.VpnTargetBuilder;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.vpn.instance.op.data.entry.vpntargets.VpnTargetKey;
  61 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  62 import org.slf4j.Logger;
  63 import org.slf4j.LoggerFactory;
  64
  65 @Singleton
  66 public class VpnInstanceListener extends AsyncDataTreeChangeListenerBase<VpnInstance, VpnInstanceListener> {
  67     private static final Logger LOG = LoggerFactory.getLogger(VpnInstanceListener.class);
  68     private static final String LOGGING_PREFIX_ADD = "VPN-ADD:";
  69     private static final String LOGGING_PREFIX_DELETE = "VPN-REMOVE:";
  70     private final DataBroker dataBroker;
  71     private final IdManagerService idManager;
  72     private final VpnInterfaceManager vpnInterfaceManager;
  73     private final IFibManager fibManager;
  74     private final VpnOpDataSyncer vpnOpDataNotifier;
  75     private final IMdsalApiManager mdsalManager;
  76     private final JobCoordinator jobCoordinator;
  77
  78     @Inject
  79     public VpnInstanceListener(final DataBroker dataBroker, final IdManagerService idManager,
  80             final VpnInterfaceManager vpnInterfaceManager, final IFibManager fibManager,
  81             final VpnOpDataSyncer vpnOpDataSyncer, final IMdsalApiManager mdsalManager,
  82             final JobCoordinator jobCoordinator) {
  83         super(VpnInstance.class, VpnInstanceListener.class);
  84         this.dataBroker = dataBroker;
  85         this.idManager = idManager;
  86         this.vpnInterfaceManager = vpnInterfaceManager;
  87         this.fibManager = fibManager;
  88         this.vpnOpDataNotifier = vpnOpDataSyncer;
  89         this.mdsalManager = mdsalManager;
  90         this.jobCoordinator = jobCoordinator;
  91     }
  92
  93     @PostConstruct
  94     public void start() {
  95         LOG.info("{} start", getClass().getSimpleName());
  96         registerListener(LogicalDatastoreType.CONFIGURATION, dataBroker);
  97     }
  98
  99     @Override
 100     protected InstanceIdentifier<VpnInstance> getWildCardPath() {
 101         return InstanceIdentifier.create(VpnInstances.class).child(VpnInstance.class);
 102     }
 103
 104     @Override
 105     protected VpnInstanceListener getDataTreeChangeListener() {
 106         return VpnInstanceListener.this;
 107     }
 108
 109     @Override
 110     protected void remove(InstanceIdentifier<VpnInstance> identifier, VpnInstance del) {
 111         LOG.trace("{} remove: VPN event key: {}, value: {}", LOGGING_PREFIX_DELETE, identifier, del);
 112         final String vpnName = del.getVpnInstanceName();
 113         Optional<VpnInstanceOpDataEntry> vpnOpValue;
 114         String primaryRd = VpnUtil.getPrimaryRd(del);
 115
 116         //TODO(vpnteam): Entire code would need refactoring to listen only on the parent object - VPNInstance
 117         try {
 118             vpnOpValue = SingleTransactionDataBroker.syncReadOptional(dataBroker, LogicalDatastoreType.OPERATIONAL,
 119                     VpnUtil.getVpnInstanceOpDataIdentifier(primaryRd));
 120         } catch (ReadFailedException e) {
 121             LOG.error("{} remove: Exception when attempting to retrieve VpnInstanceOpDataEntry for VPN {}. ",
 122                     LOGGING_PREFIX_DELETE,  vpnName, e);
 123             return;
 124         }
 125
 126         if (!vpnOpValue.isPresent()) {
 127             LOG.error("{} remove: Unable to retrieve VpnInstanceOpDataEntry for VPN {}. ", LOGGING_PREFIX_DELETE,
 128                     vpnName);
 129             return;
 130         } else {
 131             jobCoordinator.enqueueJob("VPN-" + vpnName, () -> {
 132                 VpnInstanceOpDataEntryBuilder builder = new VpnInstanceOpDataEntryBuilder().setVrfId(primaryRd)
 133                         .setVpnState(VpnInstanceOpDataEntry.VpnState.PendingDelete);
 134                 InstanceIdentifier<VpnInstanceOpDataEntry> id = VpnUtil.getVpnInstanceOpDataIdentifier(primaryRd);
 135                 WriteTransaction writeTxn = dataBroker.newWriteOnlyTransaction();
 136                 writeTxn.merge(LogicalDatastoreType.OPERATIONAL, id, builder.build());
 137
 138                 LOG.info("{} call: Operational status set to PENDING_DELETE for vpn {} with rd {}",
 139                         LOGGING_PREFIX_DELETE, vpnName, primaryRd);
 140                 return Collections.singletonList(writeTxn.submit());
 141             }, SystemPropertyReader.getDataStoreJobCoordinatorMaxRetries());
 142         }
 143     }
 144
 145     @Override
 146     protected void update(InstanceIdentifier<VpnInstance> identifier,
 147         VpnInstance original, VpnInstance update) {
 148         LOG.trace("VPN-UPDATE: update: VPN event key: {}, value: {}. Ignoring", identifier, update);
 149         String vpnName = update.getVpnInstanceName();
 150         vpnInterfaceManager.updateVpnInterfacesForUnProcessAdjancencies(vpnName);
 151     }
 152
 153     @Override
 154     protected void add(final InstanceIdentifier<VpnInstance> identifier, final VpnInstance value) {
 155         LOG.trace("{} add: Add VPN event key: {}, value: {}", LOGGING_PREFIX_ADD, identifier, value);
 156         final String vpnName = value.getVpnInstanceName();
 157         jobCoordinator.enqueueJob("VPN-" + vpnName, new AddVpnInstanceWorker(idManager, dataBroker, value),
 158                 SystemPropertyReader.getDataStoreJobCoordinatorMaxRetries());
 159     }
 160
 161     private class AddVpnInstanceWorker implements Callable<List<ListenableFuture<Void>>> {
 162         private final Logger log = LoggerFactory.getLogger(AddVpnInstanceWorker.class);
 163         IdManagerService idManager;
 164         VpnInstance vpnInstance;
 165         DataBroker broker;
 166
 167         AddVpnInstanceWorker(IdManagerService idManager,
 168             DataBroker broker,
 169             VpnInstance value) {
 170             this.idManager = idManager;
 171             this.broker = broker;
 172             this.vpnInstance = value;
 173         }
 174
 175         @Override
 176         public List<ListenableFuture<Void>> call() {
 177             // If another renderer(for eg : CSS) needs to be supported, check can be performed here
 178             // to call the respective helpers.
 179             WriteTransaction writeConfigTxn = broker.newWriteOnlyTransaction();
 180             WriteTransaction writeOperTxn = broker.newWriteOnlyTransaction();
 181             addVpnInstance(vpnInstance, writeConfigTxn, writeOperTxn);
 182             try {
 183                 writeOperTxn.submit().get();
 184             } catch (InterruptedException | ExecutionException e) {
 185                 log.error("{} call: Error creating vpn {} ", LOGGING_PREFIX_ADD, vpnInstance.getVpnInstanceName());
 186                 throw new RuntimeException(e.getMessage(), e);
 187             }
 188             List<ListenableFuture<Void>> futures = new ArrayList<>();
 189             futures.add(writeConfigTxn.submit());
 190             ListenableFuture<List<Void>> listenableFuture = Futures.allAsList(futures);
 191             Futures.addCallback(listenableFuture,
 192                                 new PostAddVpnInstanceWorker(vpnInstance , vpnInstance.getVpnInstanceName()),
 193                                 MoreExecutors.directExecutor());
 194             return futures;
 195         }
 196     }
 197
 198     // TODO Clean up the exception handling
 199     @SuppressWarnings("checkstyle:IllegalCatch")
 200     private void addVpnInstance(VpnInstance value, WriteTransaction writeConfigTxn,
 201         WriteTransaction writeOperTxn) {
 202         VpnAfConfig config = value.getIpv4Family();
 203         String vpnInstanceName = value.getVpnInstanceName();
 204
 205         long vpnId = VpnUtil.getUniqueId(idManager, VpnConstants.VPN_IDPOOL_NAME, vpnInstanceName);
 206         if (vpnId == 0) {
 207             LOG.error("{} addVpnInstance: Unable to fetch label from Id Manager. Bailing out of adding operational"
 208                     + " data for Vpn Instance {}", LOGGING_PREFIX_ADD, value.getVpnInstanceName());
 209             return;
 210         }
 211         LOG.info("{} addVpnInstance: VPN Id {} generated for VpnInstanceName {}", LOGGING_PREFIX_ADD, vpnId,
 212                 vpnInstanceName);
 213         String primaryRd = VpnUtil.getPrimaryRd(value);
 214         org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.to.vpn.id.VpnInstance
 215             vpnInstanceToVpnId = VpnUtil.getVpnInstanceToVpnId(vpnInstanceName, vpnId, primaryRd);
 216
 217         if (writeConfigTxn != null) {
 218             writeConfigTxn.put(LogicalDatastoreType.CONFIGURATION,
 219                 VpnOperDsUtils.getVpnInstanceToVpnIdIdentifier(vpnInstanceName),
 220                 vpnInstanceToVpnId, WriteTransaction.CREATE_MISSING_PARENTS);
 221         } else {
 222             TransactionUtil.syncWrite(dataBroker, LogicalDatastoreType.CONFIGURATION,
 223                 VpnOperDsUtils.getVpnInstanceToVpnIdIdentifier(vpnInstanceName),
 224                 vpnInstanceToVpnId, TransactionUtil.DEFAULT_CALLBACK);
 225         }
 226
 227         VpnIds vpnIdToVpnInstance = VpnUtil.getVpnIdToVpnInstance(vpnId, value.getVpnInstanceName(),
 228             primaryRd, VpnUtil.isBgpVpn(vpnInstanceName, primaryRd));
 229
 230         if (writeConfigTxn != null) {
 231             writeConfigTxn.put(LogicalDatastoreType.CONFIGURATION,
 232                 VpnUtil.getVpnIdToVpnInstanceIdentifier(vpnId),
 233                 vpnIdToVpnInstance, WriteTransaction.CREATE_MISSING_PARENTS);
 234         } else {
 235             TransactionUtil.syncWrite(dataBroker, LogicalDatastoreType.CONFIGURATION,
 236                 VpnUtil.getVpnIdToVpnInstanceIdentifier(vpnId),
 237                 vpnIdToVpnInstance, TransactionUtil.DEFAULT_CALLBACK);
 238         }
 239
 240         try {
 241             String cachedTransType = fibManager.getConfTransType();
 242             if (cachedTransType.equals("Invalid")) {
 243                 try {
 244                     fibManager.setConfTransType("L3VPN", "VXLAN");
 245                 } catch (Exception e) {
 246                     LOG.error("{} addVpnInstance: Exception caught setting the L3VPN tunnel transportType for vpn {}",
 247                             LOGGING_PREFIX_ADD, vpnInstanceName, e);
 248                 }
 249             } else {
 250                 LOG.debug("{} addVpnInstance: Configured tunnel transport type for L3VPN {} as {}", LOGGING_PREFIX_ADD,
 251                         vpnInstanceName, cachedTransType);
 252             }
 253         } catch (Exception e) {
 254             LOG.error("{} addVpnInstance: Error when trying to retrieve tunnel transport type for L3VPN {}",
 255                     LOGGING_PREFIX_ADD, vpnInstanceName, e);
 256         }
 257
 258         VpnInstanceOpDataEntryBuilder builder =
 259                 new VpnInstanceOpDataEntryBuilder().setVrfId(primaryRd).setVpnId(vpnId)
 260                         .setVpnInstanceName(vpnInstanceName)
 261                         .setVpnState(VpnInstanceOpDataEntry.VpnState.Created)
 262                         .setIpv4Configured(false).setIpv6Configured(false);
 263         if (VpnUtil.isBgpVpn(vpnInstanceName, primaryRd)) {
 264             List<org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.vpn
 265                 .instance.op.data.entry.vpntargets.VpnTarget> opVpnTargetList = new ArrayList<>();
 266             builder.setBgpvpnType(VpnInstanceOpDataEntry.BgpvpnType.BGPVPNExternal);
 267             if (value.getL3vni() != null) {
 268                 builder.setL3vni(value.getL3vni());
 269             }
 270             if (value.getType() == VpnInstance.Type.L2) {
 271                 builder.setType(VpnInstanceOpDataEntry.Type.L2);
 272             }
 273             VpnTargets vpnTargets = config.getVpnTargets();
 274             if (vpnTargets != null) {
 275                 List<VpnTarget> vpnTargetList = vpnTargets.getVpnTarget();
 276                 if (vpnTargetList != null) {
 277                     for (VpnTarget vpnTarget : vpnTargetList) {
 278                         VpnTargetBuilder vpnTargetBuilder =
 279                             new VpnTargetBuilder().setKey(new VpnTargetKey(vpnTarget.getKey().getVrfRTValue()))
 280                                 .setVrfRTType(org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn
 281                                     .instance.op.data.vpn.instance.op.data.entry.vpntargets.VpnTarget.VrfRTType
 282                                     .forValue(vpnTarget.getVrfRTType().getIntValue())).setVrfRTValue(
 283                                 vpnTarget.getVrfRTValue());
 284                         opVpnTargetList.add(vpnTargetBuilder.build());
 285                     }
 286                 }
 287             }
 288             VpnTargetsBuilder vpnTargetsBuilder = new VpnTargetsBuilder().setVpnTarget(opVpnTargetList);
 289             builder.setVpnTargets(vpnTargetsBuilder.build());
 290
 291             List<String> rds = config.getRouteDistinguisher();
 292             builder.setRd(rds);
 293         } else {
 294             builder.setBgpvpnType(VpnInstanceOpDataEntry.BgpvpnType.VPN);
 295         }
 296         if (writeOperTxn != null) {
 297             writeOperTxn.merge(LogicalDatastoreType.OPERATIONAL,
 298                 VpnUtil.getVpnInstanceOpDataIdentifier(primaryRd),
 299                 builder.build(), true);
 300         } else {
 301             TransactionUtil.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL,
 302                 VpnUtil.getVpnInstanceOpDataIdentifier(primaryRd),
 303                 builder.build(), TransactionUtil.DEFAULT_CALLBACK);
 304         }
 305         LOG.info("{} addVpnInstance: VpnInstanceOpData populated successfully for vpn {} rd {}", LOGGING_PREFIX_ADD,
 306                 vpnInstanceName, primaryRd);
 307     }
 308
 309     private class PostAddVpnInstanceWorker implements FutureCallback<List<Void>> {
 310         private final Logger log = LoggerFactory.getLogger(PostAddVpnInstanceWorker.class);
 311         VpnInstance vpnInstance;
 312         String vpnName;
 313
 314         PostAddVpnInstanceWorker(VpnInstance vpnInstance, String vpnName) {
 315             this.vpnInstance = vpnInstance;
 316             this.vpnName = vpnName;
 317         }
 318
 319         /**
 320          * This implies that all the future instances have returned success. -- TODO: Confirm this
 321          */
 322         @Override
 323         public void onSuccess(List<Void> voids) {
 324             /*
 325             if rd is null, then its either a router vpn instance (or) a vlan external network vpn instance.
 326             if rd is non-null, then it is a bgpvpn instance
 327              */
 328             VpnAfConfig config = vpnInstance.getIpv4Family();
 329             List<String> rd = config.getRouteDistinguisher();
 330             if (rd == null || addBgpVrf(voids)) {
 331                 notifyTask();
 332                 vpnInterfaceManager.vpnInstanceIsReady(vpnName);
 333             }
 334             log.info("{} onSuccess: Vpn Instance Op Data addition for {} successful.", LOGGING_PREFIX_ADD, vpnName);
 335             VpnInstanceOpDataEntry vpnInstanceOpDataEntry = VpnUtil.getVpnInstanceOpData(dataBroker,
 336                     VpnUtil.getPrimaryRd(vpnInstance));
 337
 338             // bind service on each tunnel interface
 339             //TODO (KIRAN): Add a new listener to handle creation of new DC-GW binding and deletion of existing DC-GW.
 340             if (VpnUtil.isL3VpnOverVxLan(vpnInstance.getL3vni())) { //Handled for L3VPN Over VxLAN
 341                 for (String tunnelInterfaceName: getDcGatewayTunnelInterfaceNameList()) {
 342                     VpnUtil.bindService(vpnInstance.getVpnInstanceName(), tunnelInterfaceName, dataBroker,
 343                             true/*isTunnelInterface*/, jobCoordinator);
 344                 }
 345
 346                 // install flow
 347                 List<MatchInfo> mkMatches = new ArrayList<>();
 348                 mkMatches.add(new MatchTunnelId(BigInteger.valueOf(vpnInstance.getL3vni())));
 349
 350                 List<InstructionInfo> instructions =
 351                         Arrays.asList(new InstructionWriteMetadata(MetaDataUtil.getVpnIdMetadata(vpnInstanceOpDataEntry
 352                                 .getVpnId()), MetaDataUtil.METADATA_MASK_VRFID),
 353                                 new InstructionGotoTable(NwConstants.L3_GW_MAC_TABLE));
 354
 355                 for (BigInteger dpnId: NWUtil.getOperativeDPNs(dataBroker)) {
 356                     String flowRef = getFibFlowRef(dpnId, NwConstants.L3VNI_EXTERNAL_TUNNEL_DEMUX_TABLE,
 357                             vpnName, VpnConstants.DEFAULT_FLOW_PRIORITY);
 358                     FlowEntity flowEntity = MDSALUtil.buildFlowEntity(dpnId,
 359                             NwConstants.L3VNI_EXTERNAL_TUNNEL_DEMUX_TABLE, flowRef, VpnConstants.DEFAULT_FLOW_PRIORITY,
 360                             "VxLAN VPN Tunnel Bind Service", 0, 0, NwConstants.COOKIE_VM_FIB_TABLE,
 361                             mkMatches, instructions);
 362                     mdsalManager.installFlow(dpnId, flowEntity);
 363                 }
 364
 365                 ///////////////////////
 366             }
 367         }
 368
 369         // TODO Clean up the exception handling
 370         @SuppressWarnings("checkstyle:IllegalCatch")
 371         private boolean addBgpVrf(List<Void> voids) {
 372             VpnAfConfig config = vpnInstance.getIpv4Family();
 373             String primaryRd = VpnUtil.getPrimaryRd(dataBroker, vpnName);
 374             List<VpnTarget> vpnTargetList = config.getVpnTargets().getVpnTarget();
 375
 376             if (vpnTargetList == null) {
 377                 log.error("{} addBgpVrf: vpn target list is empty for vpn {} RD {}", LOGGING_PREFIX_ADD,
 378                         this.vpnName, primaryRd);
 379                 return false;
 380             }
 381             vpnInterfaceManager.handleVpnsExportingRoutes(this.vpnName, primaryRd);
 382             return true;
 383         }
 384
 385         private void notifyTask() {
 386             vpnOpDataNotifier.notifyVpnOpDataReady(VpnOpDataSyncer.VpnOpDataType.vpnInstanceToId, vpnName);
 387             vpnOpDataNotifier.notifyVpnOpDataReady(VpnOpDataSyncer.VpnOpDataType.vpnOpData, vpnName);
 388         }
 389
 390         /**
 391          * This method is used to handle failure callbacks.
 392          * If more retry needed, the retrycount is decremented and mainworker is executed again.
 393          * After retries completed, rollbackworker is executed.
 394          * If rollbackworker fails, this is a double-fault. Double fault is logged and ignored.
 395          */
 396
 397         @Override
 398         public void onFailure(Throwable throwable) {
 399             log.error("{} onFailure: Job for vpnInstance: {} failed with exception:", LOGGING_PREFIX_ADD, vpnName,
 400                     throwable);
 401             vpnInterfaceManager.vpnInstanceFailed(vpnName);
 402         }
 403     }
 404
 405     protected VpnInstanceOpDataEntry getVpnInstanceOpData(String rd) {
 406         InstanceIdentifier<VpnInstanceOpDataEntry> id = VpnUtil.getVpnInstanceOpDataIdentifier(rd);
 407         Optional<VpnInstanceOpDataEntry> vpnInstanceOpData =
 408             TransactionUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, id);
 409         if (vpnInstanceOpData.isPresent()) {
 410             return vpnInstanceOpData.get();
 411         }
 412         return null;
 413     }
 414
 415     private List<String> getDcGatewayTunnelInterfaceNameList() {
 416         List<String> tunnelInterfaceNameList = new ArrayList<>();
 417
 418         InstanceIdentifier<DcGatewayIpList> dcGatewayIpListInstanceIdentifier = InstanceIdentifier
 419                 .create(DcGatewayIpList.class);
 420         Optional<DcGatewayIpList> dcGatewayIpListOptional = VpnUtil.read(dataBroker,
 421                 LogicalDatastoreType.CONFIGURATION, dcGatewayIpListInstanceIdentifier);
 422         if (!dcGatewayIpListOptional.isPresent()) {
 423             LOG.info("No DC gateways configured.");
 424             return tunnelInterfaceNameList;
 425         }
 426         List<DcGatewayIp> dcGatewayIps = dcGatewayIpListOptional.get().getDcGatewayIp();
 427
 428         InstanceIdentifier<ExternalTunnelList> externalTunnelListId = InstanceIdentifier
 429                 .create(ExternalTunnelList.class);
 430
 431         Optional<ExternalTunnelList> externalTunnelListOptional = VpnUtil.read(dataBroker,
 432                 LogicalDatastoreType.OPERATIONAL, externalTunnelListId);
 433         if (externalTunnelListOptional.isPresent()) {
 434             List<ExternalTunnel> externalTunnels = externalTunnelListOptional.get().getExternalTunnel();
 435
 436             List<String> externalTunnelIpList = new ArrayList<>();
 437             for (ExternalTunnel externalTunnel: externalTunnels) {
 438                 externalTunnelIpList.add(externalTunnel.getDestinationDevice());
 439             }
 440
 441             List<String> dcGatewayIpList = new ArrayList<>();
 442             for (DcGatewayIp dcGatewayIp: dcGatewayIps) {
 443                 dcGatewayIpList.add(dcGatewayIp.getIpAddress().getIpv4Address().toString());
 444             }
 445
 446             // Find all externalTunnelIps present in dcGateWayIpList
 447             List<String> externalTunnelIpsInDcGatewayIpList = new ArrayList<>();
 448             for (String externalTunnelIp: externalTunnelIpList) {
 449                 for (String dcGateWayIp: dcGatewayIpList) {
 450                     if (externalTunnelIp.contentEquals(dcGateWayIp)) {
 451                         externalTunnelIpsInDcGatewayIpList.add(externalTunnelIp);
 452                     }
 453                 }
 454             }
 455
 456
 457             for (String externalTunnelIpsInDcGatewayIp: externalTunnelIpsInDcGatewayIpList) {
 458                 for (ExternalTunnel externalTunnel: externalTunnels) {
 459                     if (externalTunnel.getDestinationDevice().contentEquals(externalTunnelIpsInDcGatewayIp)) {
 460                         tunnelInterfaceNameList.add(externalTunnel.getTunnelInterfaceName());
 461                     }
 462                 }
 463             }
 464
 465         }
 466         return tunnelInterfaceNameList;
 467     }
 468
 469     private String getFibFlowRef(BigInteger dpnId, short tableId, String vpnName, int priority) {
 470         return VpnConstants.FLOWID_PREFIX + dpnId + NwConstants.FLOWID_SEPARATOR + tableId
 471                 + NwConstants.FLOWID_SEPARATOR + vpnName + NwConstants.FLOWID_SEPARATOR + priority;
 472     }
 473 }