elanmanager/impl/src/main/java/org/opendaylight/netvirt/elan/l2gw/ha/HwvtepHAUtil.java

   1 /*
   2  * Copyright © 2016, 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.elan.l2gw.ha;
   9
  10 import static org.opendaylight.controller.md.sal.binding.api.WriteTransaction.CREATE_MISSING_PARENTS;
  11
  12 import com.google.common.base.Optional;
  13 import com.google.common.base.Strings;
  14 import java.nio.charset.StandardCharsets;
  15 import java.util.ArrayList;
  16 import java.util.Collection;
  17 import java.util.HashMap;
  18 import java.util.HashSet;
  19 import java.util.List;
  20 import java.util.Set;
  21 import java.util.concurrent.ExecutionException;
  22 import java.util.stream.Collectors;
  23 import javax.annotation.Nullable;
  24 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  25 import org.opendaylight.genius.infra.Datastore;
  26 import org.opendaylight.genius.infra.Datastore.Configuration;
  27 import org.opendaylight.genius.infra.TypedReadWriteTransaction;
  28 import org.opendaylight.genius.infra.TypedWriteTransaction;
  29 import org.opendaylight.genius.utils.hwvtep.HwvtepNodeHACache;
  30 import org.opendaylight.netvirt.elan.l2gw.ha.commands.SwitchesCmd;
  31 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Uri;
  32 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepGlobalAugmentation;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepGlobalAugmentationBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepLogicalSwitchRef;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepNodeName;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepPhysicalLocatorRef;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.PhysicalSwitchAugmentation;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.PhysicalSwitchAugmentationBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.LogicalSwitches;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.LogicalSwitchesKey;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.Managers;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.ManagersBuilder;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.ManagersKey;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.Switches;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.managers.ManagerOtherConfigs;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.managers.ManagerOtherConfigsBuilder;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.hwvtep.global.attributes.managers.ManagerOtherConfigsKey;
  49 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  50 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  51 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  52 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TpId;
  53 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  54 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  55 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  56 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
  57 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  58 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPoint;
  59 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPointKey;
  60 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  61 import org.slf4j.Logger;
  62 import org.slf4j.LoggerFactory;
  63
  64 public final class HwvtepHAUtil {
  65
  66     private static final Logger LOG = LoggerFactory.getLogger(HwvtepHAUtil.class);
  67
  68     //TODO reuse HWvtepSouthboundConstants
  69     public static final String HA_ENABLED = "ha_enabled";
  70     public static final String HWVTEP_ENTITY_TYPE = "hwvtep";
  71     public static final String TEP_PREFIX = "vxlan_over_ipv4:";
  72     public static final String HA_ID = "ha_id";
  73     public static final String HA_CHILDREN = "ha_children";
  74     public static final String PHYSICALSWITCH = "/physicalswitch/";
  75     public static final TopologyId HWVTEP_TOPOLOGY_ID = new TopologyId(new Uri("hwvtep:1"));
  76     public static final String UUID = "uuid";
  77     public static final String HWVTEP_URI_PREFIX = "hwvtep";
  78     public static final String MANAGER_KEY = "managerKey";
  79     public static final String L2GW_JOB_KEY = ":l2gw";
  80
  81     private HwvtepHAUtil() { }
  82
  83     public static HwvtepPhysicalLocatorRef buildLocatorRef(InstanceIdentifier<Node> nodeIid, String tepIp) {
  84         InstanceIdentifier<TerminationPoint> tepId = buildTpId(nodeIid, tepIp);
  85         return new HwvtepPhysicalLocatorRef(tepId);
  86     }
  87
  88     public static String getNodeIdVal(InstanceIdentifier<?> iid) {
  89         return iid.firstKeyOf(Node.class).getNodeId().getValue();
  90     }
  91
  92     public static Uuid getUUid(String key) {
  93         return new Uuid(java.util.UUID.nameUUIDFromBytes(key.getBytes(StandardCharsets.UTF_8)).toString());
  94     }
  95
  96     public static InstanceIdentifier<TerminationPoint> buildTpId(InstanceIdentifier<Node> nodeIid,String tepIp) {
  97         String tpKeyStr = TEP_PREFIX + tepIp;
  98         TerminationPointKey tpKey = new TerminationPointKey(new TpId(tpKeyStr));
  99         InstanceIdentifier<TerminationPoint> plIid = nodeIid.child(TerminationPoint.class, tpKey);
 100         return plIid;
 101     }
 102
 103     public static String getTepIpVal(HwvtepPhysicalLocatorRef locatorRef) {
 104         InstanceIdentifier<TerminationPoint> tpId = (InstanceIdentifier<TerminationPoint>) locatorRef.getValue();
 105         return tpId.firstKeyOf(TerminationPoint.class).getTpId().getValue().substring("vxlan_over_ipv4:".length());
 106     }
 107
 108     public static InstanceIdentifier<Node> createInstanceIdentifierFromHAId(String haUUidVal) {
 109         String nodeString = HWVTEP_URI_PREFIX + "://"
 110             + UUID + "/" + java.util.UUID.nameUUIDFromBytes(haUUidVal.getBytes(StandardCharsets.UTF_8)).toString();
 111         NodeId nodeId = new NodeId(new Uri(nodeString));
 112         NodeKey nodeKey = new NodeKey(nodeId);
 113         TopologyKey topoKey = new TopologyKey(HWVTEP_TOPOLOGY_ID);
 114         return InstanceIdentifier.builder(NetworkTopology.class)
 115                 .child(Topology.class, topoKey)
 116                 .child(Node.class, nodeKey)
 117                 .build();
 118     }
 119
 120     public static InstanceIdentifier<Node> convertToInstanceIdentifier(String nodeIdString) {
 121         NodeId nodeId = new NodeId(new Uri(nodeIdString));
 122         NodeKey nodeKey = new NodeKey(nodeId);
 123         TopologyKey topoKey = new TopologyKey(HWVTEP_TOPOLOGY_ID);
 124         return InstanceIdentifier.builder(NetworkTopology.class)
 125                 .child(Topology.class, topoKey)
 126                 .child(Node.class, nodeKey)
 127                 .build();
 128     }
 129
 130     /**
 131      * Build other config data for HA node .
 132      *
 133      * @param key The key as in HA child device other config
 134      * @param val The value as in HA child device other config
 135      * @return return other config object
 136      */
 137     public static ManagerOtherConfigsBuilder getOtherConfigBuilder(String key, String val) {
 138         ManagerOtherConfigsBuilder otherConfigsBuilder = new ManagerOtherConfigsBuilder();
 139         ManagerOtherConfigsKey otherConfigsKey = new ManagerOtherConfigsKey(key);
 140         otherConfigsBuilder.withKey(otherConfigsKey);
 141         otherConfigsBuilder.setOtherConfigKey(key);
 142         otherConfigsBuilder.setOtherConfigValue(val);
 143         return otherConfigsBuilder;
 144     }
 145
 146     public static String convertToGlobalNodeId(String psNodeId) {
 147         int idx = psNodeId.indexOf(PHYSICALSWITCH);
 148         if (idx > 0) {
 149             return psNodeId.substring(0, idx);
 150         }
 151         return psNodeId;
 152     }
 153
 154     /**
 155      * Trnaform logical switch to nodepath passed .
 156      *
 157      * @param src {@link HwvtepLogicalSwitchRef} Logical Switch Ref which needs to be transformed
 158      * @param nodePath {@link InstanceIdentifier} src needs to be transformed to this path
 159      * @return ref {@link HwvtepLogicalSwitchRef} the transforrmed result
 160      */
 161     public static HwvtepLogicalSwitchRef convertLogicalSwitchRef(HwvtepLogicalSwitchRef src,
 162                                                                  InstanceIdentifier<Node> nodePath) {
 163         InstanceIdentifier<LogicalSwitches> srcId = (InstanceIdentifier<LogicalSwitches>)src.getValue();
 164         HwvtepNodeName switchName = srcId.firstKeyOf(LogicalSwitches.class).getHwvtepNodeName();
 165         InstanceIdentifier<LogicalSwitches> iid = nodePath.augmentation(HwvtepGlobalAugmentation.class)
 166                 .child(LogicalSwitches.class, new LogicalSwitchesKey(switchName));
 167         HwvtepLogicalSwitchRef ref = new HwvtepLogicalSwitchRef(iid);
 168         return ref;
 169     }
 170
 171     /**
 172      * Trnaform locator reference to nodepath passed .
 173      *
 174      * @param src {@link HwvtepPhysicalLocatorRef} Logical Switch Ref which needs to be transformed
 175      * @param nodePath {@link InstanceIdentifier} src needs to be transformed to this path
 176      * @return physicalLocatorRef {@link HwvtepPhysicalLocatorRef} the transforrmed result
 177      */
 178     public static HwvtepPhysicalLocatorRef convertLocatorRef(HwvtepPhysicalLocatorRef src,
 179                                                              InstanceIdentifier<Node> nodePath) {
 180         InstanceIdentifier<TerminationPoint> srcTepPath = (InstanceIdentifier<TerminationPoint>)src.getValue();
 181         TpId tpId = srcTepPath.firstKeyOf(TerminationPoint.class).getTpId();
 182         InstanceIdentifier<TerminationPoint> tpPath =
 183                 nodePath.child(TerminationPoint.class, new TerminationPointKey(tpId));
 184         HwvtepPhysicalLocatorRef physicalLocatorRef = new HwvtepPhysicalLocatorRef(tpPath);
 185         return physicalLocatorRef;
 186     }
 187
 188     public static boolean isEmptyList(@Nullable List list) {
 189         return list == null || list.isEmpty();
 190     }
 191
 192     public static boolean isEmpty(Collection collection) {
 193         return collection == null || collection.isEmpty();
 194     }
 195
 196     @Nullable
 197     public static Node getOriginal(DataObjectModification<Node> mod) {
 198         Node node = null;
 199         switch (mod.getModificationType()) {
 200             case SUBTREE_MODIFIED:
 201             case DELETE:
 202                 node = mod.getDataBefore();
 203                 break;
 204             case WRITE:
 205                 if (mod.getDataBefore() !=  null) {
 206                     node = mod.getDataBefore();
 207                 }
 208                 break;
 209             default:
 210                 break;
 211         }
 212         return node;
 213     }
 214
 215     @Nullable
 216     public static Node getUpdated(DataObjectModification<Node> mod) {
 217         switch (mod.getModificationType()) {
 218             case SUBTREE_MODIFIED:
 219             case WRITE:
 220                 return mod.getDataAfter();
 221             default:
 222                 return null;
 223         }
 224     }
 225
 226     @Nullable
 227     public static Node getCreated(DataObjectModification<Node> mod) {
 228         if (mod.getModificationType() == DataObjectModification.ModificationType.WRITE
 229                 && mod.getDataBefore() == null) {
 230             return mod.getDataAfter();
 231         }
 232         return null;
 233     }
 234
 235     @Nullable
 236     public static Node getRemoved(DataObjectModification<Node> mod) {
 237         if (mod.getModificationType() == DataObjectModification.ModificationType.DELETE) {
 238             return mod.getDataBefore();
 239         }
 240         return null;
 241     }
 242
 243     @Nullable
 244     public static String getPsName(InstanceIdentifier<Node> psNodeIid) {
 245         String psNodeId = psNodeIid.firstKeyOf(Node.class).getNodeId().getValue();
 246         if (psNodeId.contains(PHYSICALSWITCH)) {
 247             return psNodeId.substring(psNodeId.indexOf(PHYSICALSWITCH) +  PHYSICALSWITCH.length());
 248         }
 249         return null;
 250     }
 251
 252     public static InstanceIdentifier<Node> getGlobalNodePathFromPSNode(Node psNode) {
 253         String psNodeId = psNode.getNodeId().getValue();
 254         if (psNodeId.contains(PHYSICALSWITCH)) {
 255             return convertToInstanceIdentifier(psNodeId.substring(0, psNodeId.indexOf(PHYSICALSWITCH)));
 256         }
 257         return convertToInstanceIdentifier(psNodeId);
 258     }
 259
 260     @Nullable
 261     public static InstanceIdentifier<Node> convertPsPath(Node psNode, InstanceIdentifier<Node> nodePath) {
 262         String psNodeId = psNode.getNodeId().getValue();
 263         if (psNodeId.contains(PHYSICALSWITCH)) {
 264             String psName = psNodeId.substring(psNodeId.indexOf(PHYSICALSWITCH) + PHYSICALSWITCH.length());
 265             String haPsNodeIdVal = nodePath.firstKeyOf(Node.class).getNodeId().getValue() + PHYSICALSWITCH + psName;
 266             InstanceIdentifier<Node> haPsPath = convertToInstanceIdentifier(haPsNodeIdVal);
 267             return haPsPath;
 268         } else {
 269             LOG.error("Failed to find ps path from node {}", psNode);
 270             return null;
 271         }
 272     }
 273
 274     public static NodeBuilder getNodeBuilderForPath(InstanceIdentifier<Node> haPath) {
 275         NodeBuilder nodeBuilder = new NodeBuilder();
 276         nodeBuilder.setNodeId(haPath.firstKeyOf(Node.class).getNodeId());
 277         return nodeBuilder;
 278     }
 279
 280     @Nullable
 281     public static String getHAIdFromManagerOtherConfig(Node node) {
 282         if (node.augmentation(HwvtepGlobalAugmentation.class) == null) {
 283             return null;
 284         }
 285         HwvtepGlobalAugmentation globalAugmentation = node.augmentation(HwvtepGlobalAugmentation.class);
 286         if (globalAugmentation != null) {
 287             List<Managers> managers = globalAugmentation.getManagers();
 288             if (managers != null && !managers.isEmpty() && managers.get(0).getManagerOtherConfigs() != null) {
 289                 for (ManagerOtherConfigs configs : managers.get(0).getManagerOtherConfigs()) {
 290                     if (HA_ID.equals(configs.getOtherConfigKey())) {
 291                         return configs.getOtherConfigValue();
 292                     }
 293                 }
 294             }
 295         }
 296         return null;
 297     }
 298
 299     /**
 300      * Returns ha child node path from ha node of config data tree.
 301      *
 302      * @param haGlobalConfigNodeOptional HA global node
 303      * @return ha Child ids
 304      */
 305     public static  List<NodeId> getChildNodeIdsFromManagerOtherConfig(Optional<Node> haGlobalConfigNodeOptional) {
 306         List<NodeId> childNodeIds = new ArrayList<>();
 307         if (!haGlobalConfigNodeOptional.isPresent()) {
 308             return childNodeIds;
 309         }
 310         HwvtepGlobalAugmentation augmentation =
 311                 haGlobalConfigNodeOptional.get().augmentation(HwvtepGlobalAugmentation.class);
 312         if (augmentation != null && augmentation.getManagers() != null
 313                 && augmentation.getManagers().size() > 0) {
 314             Managers managers = augmentation.getManagers().get(0);
 315             if (null == managers.getManagerOtherConfigs()) {
 316                 return childNodeIds;
 317             }
 318             for (ManagerOtherConfigs otherConfigs : managers.getManagerOtherConfigs()) {
 319                 if (HA_CHILDREN.equals(otherConfigs.getOtherConfigKey())) {
 320                     String nodeIdsVal = otherConfigs.getOtherConfigValue();
 321                     if (nodeIdsVal != null) {
 322                         String[] parts = nodeIdsVal.split(",");
 323                         for (String part : parts) {
 324                             childNodeIds.add(new NodeId(part));
 325                         }
 326                     }
 327
 328                 }
 329             }
 330         }
 331         return childNodeIds;
 332     }
 333
 334     public static HwvtepGlobalAugmentation getGlobalAugmentationOfNode(Node node) {
 335         HwvtepGlobalAugmentation result = null;
 336         if (node != null) {
 337             result = node.augmentation(HwvtepGlobalAugmentation.class);
 338         }
 339         if (result == null) {
 340             result = new HwvtepGlobalAugmentationBuilder().build();
 341         }
 342         return result;
 343     }
 344
 345     public static PhysicalSwitchAugmentation getPhysicalSwitchAugmentationOfNode(Node psNode) {
 346         PhysicalSwitchAugmentation result = null;
 347         if (psNode != null) {
 348             result = psNode.augmentation(PhysicalSwitchAugmentation.class);
 349         }
 350         if (result == null) {
 351             result = new PhysicalSwitchAugmentationBuilder().build();
 352         }
 353         return result;
 354     }
 355
 356     /**
 357      * Transform child managers (Source) to HA managers using HA node path.
 358      *
 359      * @param childNode Child Node
 360      * @param haGlobalCfg HA global config node
 361      * @return Transformed managers
 362      */
 363     public static List<Managers> buildManagersForHANode(Node childNode, Optional<Node> haGlobalCfg) {
 364
 365         Set<NodeId> nodeIds = new HashSet<>();
 366         nodeIds.add(childNode.getNodeId());
 367         List<NodeId> childNodeIds = getChildNodeIdsFromManagerOtherConfig(haGlobalCfg);
 368         nodeIds.addAll(childNodeIds);
 369
 370         ManagersBuilder builder1 = new ManagersBuilder();
 371
 372         builder1.withKey(new ManagersKey(new Uri(MANAGER_KEY)));
 373         List<ManagerOtherConfigs> otherConfigses = new ArrayList<>();
 374         String children = nodeIds.stream().map(NodeId::getValue).collect(Collectors.joining(","));
 375         otherConfigses.add(getOtherConfigBuilder(HA_CHILDREN, children).build());
 376         builder1.setManagerOtherConfigs(otherConfigses);
 377         List<Managers> managers = new ArrayList<>();
 378         managers.add(builder1.build());
 379         return managers;
 380     }
 381
 382     /**
 383      * Transform child switch (Source) to HA swicthes using HA node path.
 384      *
 385      * @param childNode  HA child node
 386      * @param haNodePath  HA node path
 387      * @param haNode Ha node object
 388      * @return Transformed switches
 389      */
 390     public static List<Switches> buildSwitchesForHANode(Node childNode,
 391                                                         InstanceIdentifier<Node> haNodePath,
 392                                                         Optional<Node> haNode) {
 393         List<Switches> psList = new ArrayList<>();
 394         boolean switchesAlreadyPresent = false;
 395         if (haNode.isPresent()) {
 396             Node node = haNode.get();
 397             HwvtepGlobalAugmentation augmentation = node.augmentation(HwvtepGlobalAugmentation.class);
 398             if (augmentation != null) {
 399                 if (augmentation.getSwitches() != null) {
 400                     if (augmentation.getSwitches().size() > 0) {
 401                         switchesAlreadyPresent = true;
 402                     }
 403                 }
 404             }
 405         }
 406         if (!switchesAlreadyPresent) {
 407             HwvtepGlobalAugmentation augmentation = childNode.augmentation(HwvtepGlobalAugmentation.class);
 408             if (augmentation != null && augmentation.getSwitches() != null) {
 409                 List<Switches> src = augmentation.getSwitches();
 410                 if (src != null && src.size() > 0) {
 411                     psList.add(new SwitchesCmd().transform(haNodePath, src.get(0)));
 412                 }
 413             }
 414         }
 415         return psList;
 416     }
 417
 418     /**
 419      * Build HA Global node from child nodes in config data tress.
 420      *
 421      * @param tx Transaction
 422      * @param childNode Child Node object
 423      * @param haNodePath Ha node path
 424      * @param haGlobalCfg HA global node object
 425      */
 426     public static void buildGlobalConfigForHANode(TypedWriteTransaction<Configuration> tx,
 427                                                   Node childNode,
 428                                                   InstanceIdentifier<Node> haNodePath,
 429                                                   Optional<Node> haGlobalCfg) {
 430
 431         NodeBuilder nodeBuilder = new NodeBuilder();
 432         HwvtepGlobalAugmentationBuilder hwvtepGlobalBuilder = new HwvtepGlobalAugmentationBuilder();
 433         hwvtepGlobalBuilder.setSwitches(buildSwitchesForHANode(childNode, haNodePath, haGlobalCfg));
 434         hwvtepGlobalBuilder.setManagers(buildManagersForHANode(childNode, haGlobalCfg));
 435
 436         nodeBuilder.setNodeId(haNodePath.firstKeyOf(Node.class).getNodeId());
 437         nodeBuilder.addAugmentation(HwvtepGlobalAugmentation.class, hwvtepGlobalBuilder.build());
 438         Node configHANode = nodeBuilder.build();
 439         tx.merge(haNodePath, configHANode, CREATE_MISSING_PARENTS);
 440     }
 441
 442     public static <D extends Datastore> void deleteNodeIfPresent(TypedReadWriteTransaction<D> tx,
 443             InstanceIdentifier<?> iid) throws ExecutionException, InterruptedException {
 444         if (tx.read(iid).get().isPresent()) {
 445             LOG.info("Deleting child node {}", getNodeIdVal(iid));
 446             tx.delete(iid);
 447         }
 448     }
 449
 450     /**
 451      * Delete PS data of HA node of Config Data tree.
 452      *
 453      * @param key Node object
 454      * @param haNode Ha Node from which to be deleted
 455      * @param tx Transaction
 456      */
 457     public static void deletePSNodesOfNode(InstanceIdentifier<Node> key, Node haNode,
 458             TypedReadWriteTransaction<Configuration> tx) throws ExecutionException, InterruptedException {
 459         //read from switches attribute and clean up them
 460         HwvtepGlobalAugmentation globalAugmentation = haNode.augmentation(HwvtepGlobalAugmentation.class);
 461         if (globalAugmentation == null) {
 462             return;
 463         }
 464         HashMap<InstanceIdentifier<Node>,Boolean> deleted = new HashMap<>();
 465         List<Switches> switches = globalAugmentation.getSwitches();
 466         if (switches != null) {
 467             for (Switches switche : switches) {
 468                 InstanceIdentifier<Node> psId = (InstanceIdentifier<Node>)switche.getSwitchRef().getValue();
 469                 deleteNodeIfPresent(tx, psId);
 470                 deleted.put(psId, Boolean.TRUE);
 471             }
 472         }
 473         //also read from managed by attribute of switches and cleanup them as a back up if the above cleanup fails
 474         Optional<Topology> topologyOptional = tx .read(key.firstIdentifierOf(Topology.class)).get();
 475         String deletedNodeId = key.firstKeyOf(Node.class).getNodeId().getValue();
 476         if (topologyOptional.isPresent()) {
 477             Topology topology = topologyOptional.get();
 478             if (topology.getNode() != null) {
 479                 for (Node psNode : topology.getNode()) {
 480                     PhysicalSwitchAugmentation ps = psNode.augmentation(PhysicalSwitchAugmentation.class);
 481                     if (ps != null) {
 482                         InstanceIdentifier<Node> iid = (InstanceIdentifier<Node>)ps.getManagedBy().getValue();
 483                         String nodeIdVal = iid.firstKeyOf(Node.class).getNodeId().getValue();
 484                         if (deletedNodeId.equals(nodeIdVal)) {
 485                             InstanceIdentifier<Node> psNodeId =
 486                                     convertToInstanceIdentifier(psNode.getNodeId().getValue());
 487                             if (deleted.containsKey(psNodeId)) {
 488                                 deleteNodeIfPresent(tx, psNodeId);
 489                             }
 490                         }
 491                     }
 492                 }
 493             }
 494         }
 495     }
 496
 497     public static void addToCacheIfHAChildNode(InstanceIdentifier<Node> childPath, Node childNode,
 498             HwvtepNodeHACache hwvtepNodeHACache) {
 499         String haId = HwvtepHAUtil.getHAIdFromManagerOtherConfig(childNode);
 500         if (!Strings.isNullOrEmpty(haId)) {
 501             InstanceIdentifier<Node> parentId = HwvtepHAUtil.createInstanceIdentifierFromHAId(haId);
 502             hwvtepNodeHACache.addChild(parentId, childPath/*child*/);
 503         }
 504     }
 505 }