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