tapi/src/main/java/org/opendaylight/transportpce/tapi/utils/TapiContext.java

   1 /*
   2  * Copyright © 2021 Nokia, 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.transportpce.tapi.utils;
   9
  10 import java.nio.charset.Charset;
  11 import java.util.HashMap;
  12 import java.util.Map;
  13 import java.util.Optional;
  14 import java.util.UUID;
  15 import java.util.concurrent.ExecutionException;
  16 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  17 import org.opendaylight.transportpce.common.network.NetworkTransactionService;
  18 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev181210.Context;
  19 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev181210.ContextBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev181210.Uuid;
  21 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev181210.global._class.Name;
  22 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev181210.global._class.NameBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev181210.tapi.context.ServiceInterfacePoint;
  24 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev181210.tapi.context.ServiceInterfacePointKey;
  25 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.Context1;
  26 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.Context1Builder;
  27 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.OwnedNodeEdgePoint1;
  28 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.OwnedNodeEdgePoint1Builder;
  29 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.cep.list.ConnectionEndPoint;
  30 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.cep.list.ConnectionEndPointKey;
  31 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.connectivity.context.Connection;
  32 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.connectivity.context.ConnectionKey;
  33 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.connectivity.context.ConnectivityService;
  34 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.connectivity.context.ConnectivityServiceKey;
  35 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContextBuilder;
  36 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.context.topology.context.topology.node.owned.node.edge.point.CepList;
  37 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.context.topology.context.topology.node.owned.node.edge.point.CepListBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.context.TopologyContext;
  39 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.context.TopologyContextBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.node.OwnedNodeEdgePoint;
  41 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.node.OwnedNodeEdgePointBuilder;
  42 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.node.OwnedNodeEdgePointKey;
  43 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.Link;
  44 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.LinkKey;
  45 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.Node;
  46 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.NodeBuilder;
  47 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.NodeKey;
  48 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.context.NwTopologyServiceBuilder;
  49 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.context.Topology;
  50 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.context.TopologyKey;
  51 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  52 import org.slf4j.Logger;
  53 import org.slf4j.LoggerFactory;
  54
  55 public class TapiContext {
  56
  57     private static final Logger LOG = LoggerFactory.getLogger(TapiContext.class);
  58     public static final String TAPI_CONTEXT = "T-API context";
  59     public static final String NODE_NOT_PRESENT = "Node is not present in datastore";
  60     private final NetworkTransactionService networkTransactionService;
  61
  62     public TapiContext(NetworkTransactionService networkTransactionService) {
  63         this.networkTransactionService = networkTransactionService;
  64         createTapiContext();
  65     }
  66
  67     private void createTapiContext() {
  68         try {
  69             // Augmenting tapi context to include topology and connectivity contexts
  70             Name contextName = new NameBuilder().setValue(TAPI_CONTEXT).setValueName("TAPI Context Name").build();
  71
  72             Context1 connectivityContext =
  73                 new Context1Builder()
  74                     .setConnectivityContext(
  75                         new ConnectivityContextBuilder()
  76                             .setConnection(new HashMap<>())
  77                             .setConnectivityService(new HashMap<>())
  78                             .build())
  79                     .build();
  80
  81             Name nwTopoServiceName =
  82                 new NameBuilder()
  83                     .setValue("Network Topo Service")
  84                     .setValueName("Network Topo Service Name")
  85                     .build();
  86
  87             org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.Context1 topologyContext
  88                 = new org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.Context1Builder()
  89                     .setTopologyContext(new TopologyContextBuilder()
  90                         .setNwTopologyService(new NwTopologyServiceBuilder()
  91                             .setTopology(new HashMap<>())
  92                             .setUuid(
  93                                 new Uuid(
  94                                     UUID.nameUUIDFromBytes("Network Topo Service".getBytes(Charset.forName("UTF-8")))
  95                                         .toString()))
  96                             .setName(Map.of(nwTopoServiceName.key(), nwTopoServiceName))
  97                             .build())
  98                         .setTopology(new HashMap<>())
  99                         .build())
 100                     .build();
 101
 102             ContextBuilder contextBuilder = new ContextBuilder()
 103                     .setName(Map.of(contextName.key(), contextName))
 104                     .setUuid(
 105                         new Uuid(UUID.nameUUIDFromBytes(TAPI_CONTEXT.getBytes(Charset.forName("UTF-8"))).toString()))
 106                     .setServiceInterfacePoint(new HashMap<>())
 107                     .addAugmentation(connectivityContext)
 108                     .addAugmentation(topologyContext);
 109
 110             // todo: add notification context
 111             InstanceIdentifier<Context> contextIID = InstanceIdentifier.builder(Context.class).build();
 112             // put in datastore
 113             this.networkTransactionService.put(LogicalDatastoreType.OPERATIONAL, contextIID, contextBuilder.build());
 114             this.networkTransactionService.commit().get();
 115             LOG.info("TAPI context created successfully.");
 116         } catch (InterruptedException | ExecutionException e) {
 117             LOG.error("Failed to create TAPI context", e);
 118         }
 119     }
 120
 121     public Context getTapiContext() {
 122         // TODO: verify this is correct. Should we identify the context IID with the context UUID??
 123         //  There is no Identifiable in Context model
 124         InstanceIdentifier<Context> contextIID = InstanceIdentifier.builder(Context.class).build();
 125         try {
 126             Optional<Context> optionalContext = this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL,
 127                     contextIID).get();
 128             if (!optionalContext.isPresent()) {
 129                 LOG.error("Tapi context is not present in datastore");
 130                 return null;
 131             }
 132             return optionalContext.get();
 133         } catch (InterruptedException | ExecutionException e) {
 134             LOG.error("Couldnt read tapi context from datastore", e);
 135             return null;
 136         }
 137     }
 138
 139     public void deleteTapiContext() {
 140
 141     }
 142
 143     public void updateTopologyContext(Map<TopologyKey, Topology> topologyMap) {
 144         // TODO: solve error when merging: Topology is not a valid child of topology context?
 145         // TODO: verify this is correct. Should we identify the context IID with the context UUID??
 146         try {
 147             TopologyContext topologyContext = new TopologyContextBuilder()
 148                     //.setNwTopologyService(new NwTopologyServiceBuilder().build())
 149                     .setTopology(topologyMap)
 150                     .build();
 151             InstanceIdentifier<TopologyContext> topologycontextIID =
 152                     InstanceIdentifier.builder(Context.class).augmentation(org.opendaylight.yang.gen.v1.urn
 153                             .onf.otcc.yang.tapi.topology.rev181210.Context1.class)
 154                             .child(TopologyContext.class)
 155                             .build();
 156             // merge in datastore
 157             this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, topologycontextIID,
 158                     topologyContext);
 159             this.networkTransactionService.commit().get();
 160             LOG.info("TAPI topology merged successfully.");
 161         } catch (InterruptedException | ExecutionException e) {
 162             LOG.error("Failed to merge TAPI topology", e);
 163         }
 164     }
 165
 166     public void updateSIPContext(Map<ServiceInterfacePointKey, ServiceInterfacePoint> sipMap) {
 167         // TODO: verify this is correct. Should we identify the context IID with the context UUID??
 168         try {
 169             ContextBuilder contextBuilder = new ContextBuilder().setServiceInterfacePoint(sipMap);
 170             InstanceIdentifier<Context> contextIID = InstanceIdentifier.builder(Context.class).build();
 171             // merge in datastore
 172             this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, contextIID,
 173                     contextBuilder.build());
 174             this.networkTransactionService.commit().get();
 175             LOG.info("TAPI SIPs merged successfully.");
 176         } catch (InterruptedException | ExecutionException e) {
 177             LOG.error("Failed to merge TAPI SIPs", e);
 178         }
 179     }
 180
 181     public void updateConnectivityContext(Map<ConnectivityServiceKey, ConnectivityService> connServMap,
 182                                           Map<ConnectionKey, Connection> connectionFullMap) {
 183         // TODO: verify this is correct. Should we identify the context IID with the context UUID??
 184         try {
 185             org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContext
 186                 connectivityContext = new ConnectivityContextBuilder()
 187                 .setConnectivityService(connServMap)
 188                 .setConnection(connectionFullMap)
 189                 .build();
 190             InstanceIdentifier<org.opendaylight.yang.gen.v1.urn
 191                 .onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContext> connectivitycontextIID =
 192                     InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 193                         .child(org.opendaylight.yang.gen.v1.urn
 194                             .onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContext.class)
 195                         .build();
 196             // merge in datastore
 197             this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, connectivitycontextIID,
 198                 connectivityContext);
 199             this.networkTransactionService.commit().get();
 200             LOG.info("TAPI connectivity merged successfully.");
 201         } catch (InterruptedException | ExecutionException e) {
 202             LOG.error("Failed to merge TAPI connectivity", e);
 203         }
 204     }
 205
 206     public void updateTopologyWithCep(Uuid topoUuid, Uuid nodeUuid, Uuid nepUuid, ConnectionEndPoint cep) {
 207         // TODO: verify this is correct. Should we identify the context IID with the context UUID??
 208         InstanceIdentifier<OwnedNodeEdgePoint> onepIID = InstanceIdentifier.builder(Context.class)
 209             .augmentation(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.Context1.class)
 210             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.context.TopologyContext.class)
 211             .child(Topology.class, new TopologyKey(topoUuid))
 212             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.Node.class,
 213                     new NodeKey(nodeUuid))
 214             .child(OwnedNodeEdgePoint.class, new OwnedNodeEdgePointKey(nepUuid))
 215             .build();
 216         try {
 217             Optional<OwnedNodeEdgePoint> optionalOnep = this.networkTransactionService.read(
 218                     LogicalDatastoreType.OPERATIONAL, onepIID).get();
 219             if (!optionalOnep.isPresent()) {
 220                 LOG.error("ONEP is not present in datastore");
 221                 return;
 222             }
 223             OwnedNodeEdgePoint onep = optionalOnep.get();
 224             LOG.info("ONEP found = {}", onep);
 225             // TODO -> If cep exists -> skip merging to datasore
 226             OwnedNodeEdgePoint1 onep1 = onep.augmentation(OwnedNodeEdgePoint1.class);
 227             if (onep1 != null && onep1.getCepList() != null && onep1.getCepList().getConnectionEndPoint() != null
 228                     && onep1.getCepList().getConnectionEndPoint().containsKey(new ConnectionEndPointKey(cep.key()))) {
 229                 LOG.info("CEP already in topology, skipping merge");
 230                 return;
 231             }
 232             // Updated ONEP
 233             CepList cepList = new CepListBuilder().setConnectionEndPoint(Map.of(cep.key(), cep)).build();
 234             OwnedNodeEdgePoint1 onep1Bldr = new OwnedNodeEdgePoint1Builder().setCepList(cepList).build();
 235             OwnedNodeEdgePoint newOnep = new OwnedNodeEdgePointBuilder(onep)
 236                     .addAugmentation(onep1Bldr)
 237                     .build();
 238             LOG.info("New ONEP is {}", newOnep);
 239             // merge in datastore
 240             this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, onepIID,
 241                     newOnep);
 242             this.networkTransactionService.commit().get();
 243             LOG.info("CEP added successfully.");
 244         } catch (InterruptedException | ExecutionException e) {
 245             LOG.error("Couldnt update cep in topology", e);
 246         }
 247     }
 248
 249     public Node getTapiNode(Uuid topoUuid, Uuid nodeUuid) {
 250         InstanceIdentifier<Node> nodeIID = InstanceIdentifier.builder(Context.class)
 251             .augmentation(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.Context1.class)
 252             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.context.TopologyContext.class)
 253             .child(Topology.class, new TopologyKey(topoUuid))
 254             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.Node.class,
 255                         new NodeKey(nodeUuid)).build();
 256         try {
 257             Optional<Node> optNode = this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, nodeIID)
 258                     .get();
 259             if (!optNode.isPresent()) {
 260                 LOG.error(NODE_NOT_PRESENT);
 261                 return null;
 262             }
 263             // TODO -> Need to remove CEPs from NEPs. If not error from get Topology details output
 264             Node node = optNode.get();
 265             Map<OwnedNodeEdgePointKey, OwnedNodeEdgePoint> onepMap = new HashMap<>();
 266             for (OwnedNodeEdgePoint onep: node.getOwnedNodeEdgePoint().values()) {
 267                 if (onep.augmentation(OwnedNodeEdgePoint1.class) == null) {
 268                     onepMap.put(onep.key(), onep);
 269                     continue;
 270                 }
 271                 OwnedNodeEdgePointBuilder newOnepBuilder = new OwnedNodeEdgePointBuilder()
 272                     .setUuid(onep.getUuid())
 273                     .setLayerProtocolName(onep.getLayerProtocolName())
 274                     .setName(onep.getName())
 275                     .setSupportedCepLayerProtocolQualifier(onep.getSupportedCepLayerProtocolQualifier())
 276                     .setAdministrativeState(onep.getAdministrativeState())
 277                     .setOperationalState(onep.getOperationalState())
 278                     .setLifecycleState(onep.getLifecycleState())
 279                     .setTerminationDirection(onep.getTerminationDirection())
 280                     .setTerminationState(onep.getTerminationState())
 281                     .setLinkPortDirection(onep.getLinkPortDirection())
 282                     .setLinkPortRole(onep.getLinkPortRole());
 283                 if (onep.getMappedServiceInterfacePoint() != null) {
 284                     newOnepBuilder.setMappedServiceInterfacePoint(onep.getMappedServiceInterfacePoint());
 285                 }
 286                 onepMap.put(newOnepBuilder.key(), newOnepBuilder.build());
 287             }
 288             return new NodeBuilder(node)
 289                 .setOwnedNodeEdgePoint(onepMap)
 290                 .build();
 291         } catch (InterruptedException | ExecutionException e) {
 292             LOG.error("Couldnt read node in topology", e);
 293             return null;
 294         }
 295     }
 296
 297     public OwnedNodeEdgePoint getTapiNEP(Uuid topoUuid, Uuid nodeUuid, Uuid nepUuid) {
 298         InstanceIdentifier<OwnedNodeEdgePoint> nepIID = InstanceIdentifier.builder(Context.class)
 299             .augmentation(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.Context1.class)
 300             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.context.TopologyContext.class)
 301             .child(Topology.class, new TopologyKey(topoUuid))
 302             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.Node.class,
 303                 new NodeKey(nodeUuid)).child(OwnedNodeEdgePoint.class, new OwnedNodeEdgePointKey(nepUuid)).build();
 304         try {
 305             Optional<OwnedNodeEdgePoint> optNode = this.networkTransactionService
 306                     .read(LogicalDatastoreType.OPERATIONAL, nepIID)
 307                     .get();
 308             if (!optNode.isPresent()) {
 309                 LOG.error(NODE_NOT_PRESENT);
 310                 return null;
 311             }
 312             return optNode.get();
 313         } catch (InterruptedException | ExecutionException e) {
 314             LOG.error("Couldnt read NEP in topology", e);
 315             return null;
 316         }
 317     }
 318
 319     public Link getTapiLink(Uuid topoUuid, Uuid linkUuid) {
 320         InstanceIdentifier<Link> linkIID = InstanceIdentifier.builder(Context.class)
 321             .augmentation(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.Context1.class)
 322             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.context.TopologyContext.class)
 323             .child(Topology.class, new TopologyKey(topoUuid))
 324             .child(Link.class, new LinkKey(linkUuid)).build();
 325         try {
 326             Optional<Link> optLink = this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, linkIID)
 327                     .get();
 328             if (!optLink.isPresent()) {
 329                 LOG.error(NODE_NOT_PRESENT);
 330                 return null;
 331             }
 332             return optLink.get();
 333         } catch (InterruptedException | ExecutionException e) {
 334             LOG.error("Couldnt read link in topology", e);
 335             return null;
 336         }
 337     }
 338
 339     public Map<TopologyKey, Topology> getTopologyContext() {
 340         InstanceIdentifier<TopologyContext> topologycontextIID =
 341                 InstanceIdentifier.builder(Context.class).augmentation(org.opendaylight.yang.gen.v1.urn
 342                         .onf.otcc.yang.tapi.topology.rev181210.Context1.class)
 343                         .child(TopologyContext.class)
 344                         .build();
 345         try {
 346             Optional<TopologyContext> optTopoContext = this.networkTransactionService.read(
 347                     LogicalDatastoreType.OPERATIONAL, topologycontextIID).get();
 348             if (!optTopoContext.isPresent()) {
 349                 LOG.error("Topology context is not present in datastore");
 350                 return null;
 351             }
 352             return optTopoContext.get().getTopology();
 353         } catch (InterruptedException | ExecutionException e) {
 354             LOG.error("Couldnt read topology context", e);
 355             return null;
 356         }
 357     }
 358
 359     public ConnectivityService getConnectivityService(Uuid serviceUuid) {
 360         try {
 361             // First read connectivity service with service uuid and update info
 362             InstanceIdentifier<ConnectivityService> connectivityServIID =
 363                 InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 364                     .child(org.opendaylight.yang.gen.v1.urn
 365                         .onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContext.class)
 366                     .child(ConnectivityService.class, new ConnectivityServiceKey(serviceUuid))
 367                     .build();
 368
 369             Optional<ConnectivityService> optConnServ =
 370                 this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connectivityServIID).get();
 371             if (!optConnServ.isPresent()) {
 372                 LOG.error("Connectivity service not found in tapi context");
 373                 return null;
 374             }
 375             return optConnServ.get();
 376         } catch (InterruptedException | ExecutionException e) {
 377             LOG.error("Connectivity service not found in tapi context. Error:", e);
 378             return null;
 379         }
 380     }
 381
 382     public void deleteConnectivityService(Uuid serviceUuid) {
 383         ConnectivityService connectivityService = getConnectivityService(serviceUuid);
 384         if (connectivityService == null) {
 385             LOG.error("Service doesnt exist in tapi context");
 386             return;
 387         }
 388         for (org.opendaylight.yang.gen.v1
 389                 .urn.onf.otcc.yang.tapi.connectivity.rev181210.connectivity.service.Connection connection:
 390                     connectivityService.getConnection().values()) {
 391             deleteConnection(connection.getConnectionUuid());
 392         }
 393         InstanceIdentifier<ConnectivityService> connectivityServIID =
 394                 InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 395                         .child(org.opendaylight.yang.gen.v1.urn
 396                                 .onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContext.class)
 397                         .child(ConnectivityService.class, new ConnectivityServiceKey(serviceUuid))
 398                         .build();
 399         try {
 400             this.networkTransactionService.delete(LogicalDatastoreType.OPERATIONAL, connectivityServIID);
 401             this.networkTransactionService.commit().get();
 402             LOG.info("Connectivity service deleted");
 403         } catch (InterruptedException | ExecutionException e) {
 404             LOG.error("Failed to delete Connectivity service", e);
 405         }
 406     }
 407
 408     private void deleteConnection(Uuid connectionUuid) {
 409         // First read connectivity service with service uuid and update info
 410         InstanceIdentifier<org.opendaylight.yang.gen.v1
 411             .urn.onf.otcc.yang.tapi.connectivity.rev181210.connectivity.context.Connection> connectionIID =
 412             InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 413                 .child(org.opendaylight.yang.gen.v1.urn
 414                     .onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContext.class)
 415                 .child(org.opendaylight.yang.gen.v1.urn
 416                         .onf.otcc.yang.tapi.connectivity.rev181210.connectivity.context.Connection.class,
 417                     new org.opendaylight.yang.gen.v1.urn
 418                         .onf.otcc.yang.tapi.connectivity.rev181210.connectivity.context.ConnectionKey(
 419                             connectionUuid))
 420                 .build();
 421         try {
 422             this.networkTransactionService.delete(LogicalDatastoreType.OPERATIONAL, connectionIID);
 423             this.networkTransactionService.commit().get();
 424         } catch (InterruptedException | ExecutionException e) {
 425             LOG.error("Failed to delete TAPI Connection", e);
 426         }
 427     }
 428
 429     public Connection getConnection(Uuid connectionUuid) {
 430         try {
 431             // First read connectivity service with service uuid and update info
 432             InstanceIdentifier<Connection> connIID =
 433                 InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 434                     .child(org.opendaylight.yang.gen.v1.urn
 435                         .onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContext.class)
 436                     .child(Connection.class, new ConnectionKey(connectionUuid))
 437                     .build();
 438
 439             Optional<Connection> optConn =
 440                 this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connIID).get();
 441             if (!optConn.isPresent()) {
 442                 LOG.error("Connection not found in tapi context");
 443                 return null;
 444             }
 445             return optConn.get();
 446         } catch (InterruptedException | ExecutionException e) {
 447             LOG.error("Connection not found in tapi context. Error:", e);
 448             return null;
 449         }
 450     }
 451
 452     public Map<ConnectivityServiceKey, ConnectivityService> getConnectivityServices() {
 453         try {
 454             // First read connectivity service with service uuid and update info
 455             InstanceIdentifier<org.opendaylight.yang.gen.v1.urn
 456                 .onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContext> connectivityContextIID =
 457                 InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 458                     .child(org.opendaylight.yang.gen.v1.urn
 459                         .onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContext.class)
 460                     .build();
 461
 462             Optional<org.opendaylight.yang.gen.v1.urn
 463                 .onf.otcc.yang.tapi.connectivity.rev181210.context.ConnectivityContext> optConnContext =
 464                     this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connectivityContextIID)
 465                         .get();
 466             if (!optConnContext.isPresent()) {
 467                 LOG.error("Connectivity context not found in tapi context");
 468                 return null;
 469             }
 470             return optConnContext.get().getConnectivityService();
 471         } catch (InterruptedException | ExecutionException e) {
 472             LOG.error("Connectivity context not found in tapi context. Error:", e);
 473             return null;
 474         }
 475     }
 476
 477     public ConnectionEndPoint getTapiCEP(Uuid topoUuid, Uuid nodeUuid, Uuid nepUuid, Uuid cepUuid) {
 478         InstanceIdentifier<OwnedNodeEdgePoint> nepIID = InstanceIdentifier.builder(Context.class)
 479             .augmentation(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.Context1.class)
 480             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.context.TopologyContext.class)
 481             .child(Topology.class, new TopologyKey(topoUuid))
 482             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.topology.Node.class,
 483                 new NodeKey(nodeUuid)).child(OwnedNodeEdgePoint.class, new OwnedNodeEdgePointKey(nepUuid)).build();
 484         try {
 485             Optional<OwnedNodeEdgePoint> optNode = this.networkTransactionService
 486                 .read(LogicalDatastoreType.OPERATIONAL, nepIID).get();
 487             if (!optNode.isPresent()) {
 488                 LOG.error(NODE_NOT_PRESENT);
 489                 return null;
 490             }
 491             if (optNode.get().augmentation(OwnedNodeEdgePoint1.class) == null) {
 492                 LOG.error("Node doesnt have ceps");
 493                 return null;
 494             }
 495             return optNode.get().augmentation(OwnedNodeEdgePoint1.class).getCepList().getConnectionEndPoint()
 496                 .get(new ConnectionEndPointKey(cepUuid));
 497         } catch (InterruptedException | ExecutionException e) {
 498             LOG.error("Couldnt read node in topology", e);
 499             return null;
 500         }
 501     }
 502 }