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.rev221121.Context;
  19 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.ContextBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.LayerProtocolName;
  21 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.Uuid;
  22 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.global._class.Name;
  23 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.global._class.NameBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.tapi.context.ServiceInterfacePoint;
  25 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.tapi.context.ServiceInterfacePointKey;
  26 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.Context1;
  27 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.Context1Builder;
  28 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.OwnedNodeEdgePoint1;
  29 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.OwnedNodeEdgePoint1Builder;
  30 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.cep.list.ConnectionEndPoint;
  31 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.cep.list.ConnectionEndPointKey;
  32 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connection.LowerConnection;
  33 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connection.LowerConnectionKey;
  34 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.Connection;
  35 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.ConnectionKey;
  36 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.ConnectivityService;
  37 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.ConnectivityServiceKey;
  38 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContextBuilder;
  39 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.context.topology.context.topology.node.owned.node.edge.point.CepList;
  40 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.context.topology.context.topology.node.owned.node.edge.point.CepListBuilder;
  41 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.context.NotificationContextBuilder;
  42 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.context.TopologyContext;
  43 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.context.TopologyContextBuilder;
  44 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.node.OwnedNodeEdgePoint;
  45 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.node.OwnedNodeEdgePointBuilder;
  46 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.node.OwnedNodeEdgePointKey;
  47 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.Link;
  48 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.LinkKey;
  49 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.Node;
  50 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.NodeBuilder;
  51 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.NodeKey;
  52 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.context.NwTopologyServiceBuilder;
  53 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.context.Topology;
  54 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.context.TopologyKey;
  55 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  56 import org.slf4j.Logger;
  57 import org.slf4j.LoggerFactory;
  58
  59 public class TapiContext {
  60
  61     private static final Logger LOG = LoggerFactory.getLogger(TapiContext.class);
  62     public static final String TAPI_CONTEXT = "T-API context";
  63     public static final String NODE_NOT_PRESENT = "Node is not present in datastore";
  64     private final NetworkTransactionService networkTransactionService;
  65
  66     public TapiContext(NetworkTransactionService networkTransactionService) {
  67         this.networkTransactionService = networkTransactionService;
  68         createTapiContext();
  69     }
  70
  71     private void createTapiContext() {
  72         try {
  73             // Augmenting tapi context to include topology and connectivity contexts
  74             Name contextName = new NameBuilder().setValue(TAPI_CONTEXT).setValueName("TAPI Context Name").build();
  75
  76             Context1 connectivityContext =
  77                 new Context1Builder()
  78                     .setConnectivityContext(
  79                         new ConnectivityContextBuilder()
  80                             .setConnection(new HashMap<>())
  81                             .setConnectivityService(new HashMap<>())
  82                             .build())
  83                     .build();
  84
  85             Name nwTopoServiceName =
  86                 new NameBuilder()
  87                     .setValue("Network Topo Service")
  88                     .setValueName("Network Topo Service Name")
  89                     .build();
  90
  91             org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.Context1 topologyContext
  92                 = new org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.Context1Builder()
  93                     .setTopologyContext(new TopologyContextBuilder()
  94                         .setNwTopologyService(new NwTopologyServiceBuilder()
  95                             .setTopology(new HashMap<>())
  96                             .setUuid(
  97                                 new Uuid(
  98                                     UUID.nameUUIDFromBytes("Network Topo Service".getBytes(Charset.forName("UTF-8")))
  99                                         .toString()))
 100                             .setName(Map.of(nwTopoServiceName.key(), nwTopoServiceName))
 101                             .build())
 102                         .setTopology(new HashMap<>())
 103                         .build())
 104                     .build();
 105
 106             org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.Context1 notificationContext
 107                 = new org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.Context1Builder()
 108                     .setNotificationContext(new NotificationContextBuilder()
 109                         .setNotification(new HashMap<>())
 110                         .setNotifSubscription(new HashMap<>())
 111                         .build())
 112                     .build();
 113
 114             ContextBuilder contextBuilder = new ContextBuilder()
 115                     .setName(Map.of(contextName.key(), contextName))
 116                     .setUuid(
 117                         new Uuid(UUID.nameUUIDFromBytes(TAPI_CONTEXT.getBytes(Charset.forName("UTF-8"))).toString()))
 118                     .setServiceInterfacePoint(new HashMap<>())
 119                     .addAugmentation(connectivityContext)
 120                     .addAugmentation(topologyContext)
 121                     .addAugmentation(notificationContext);
 122
 123             // todo: add notification context
 124             InstanceIdentifier<Context> contextIID = InstanceIdentifier.builder(Context.class).build();
 125             // put in datastore
 126             this.networkTransactionService.put(LogicalDatastoreType.OPERATIONAL, contextIID, contextBuilder.build());
 127             this.networkTransactionService.commit().get();
 128             LOG.info("TAPI context created successfully.");
 129         } catch (InterruptedException | ExecutionException e) {
 130             LOG.error("Failed to create TAPI context", e);
 131         }
 132     }
 133
 134     public Context getTapiContext() {
 135         // TODO: verify this is correct. Should we identify the context IID with the context UUID??
 136         //  There is no Identifiable in Context model
 137         InstanceIdentifier<Context> contextIID = InstanceIdentifier.builder(Context.class).build();
 138         try {
 139             Optional<Context> optionalContext = this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL,
 140                     contextIID).get();
 141             if (!optionalContext.isPresent()) {
 142                 LOG.error("Tapi context is not present in datastore");
 143                 return null;
 144             }
 145             return optionalContext.orElseThrow();
 146         } catch (InterruptedException | ExecutionException e) {
 147             LOG.error("Couldnt read tapi context from datastore", e);
 148             return null;
 149         }
 150     }
 151
 152     public void deleteTapiContext() {
 153
 154     }
 155
 156     public void updateTopologyContext(Map<TopologyKey, Topology> topologyMap) {
 157         // TODO: solve error when merging: Topology is not a valid child of topology context?
 158         // TODO: verify this is correct. Should we identify the context IID with the context UUID??
 159         try {
 160             TopologyContext topologyContext = new TopologyContextBuilder()
 161                     //.setNwTopologyService(new NwTopologyServiceBuilder().build())
 162                     .setTopology(topologyMap)
 163                     .build();
 164             InstanceIdentifier<TopologyContext> topologycontextIID =
 165                     InstanceIdentifier.builder(Context.class).augmentation(org.opendaylight.yang.gen.v1.urn
 166                             .onf.otcc.yang.tapi.topology.rev221121.Context1.class)
 167                             .child(TopologyContext.class)
 168                             .build();
 169             // merge in datastore
 170             this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, topologycontextIID,
 171                     topologyContext);
 172             this.networkTransactionService.commit().get();
 173             LOG.info("TAPI topology merged successfully.");
 174         } catch (InterruptedException | ExecutionException e) {
 175             LOG.error("Failed to merge TAPI topology", e);
 176         }
 177     }
 178
 179     public void updateSIPContext(Map<ServiceInterfacePointKey, ServiceInterfacePoint> sipMap) {
 180         // TODO: verify this is correct. Should we identify the context IID with the context UUID??
 181         try {
 182             ContextBuilder contextBuilder = new ContextBuilder().setServiceInterfacePoint(sipMap);
 183             InstanceIdentifier<Context> contextIID = InstanceIdentifier.builder(Context.class).build();
 184             // merge in datastore
 185             this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, contextIID,
 186                     contextBuilder.build());
 187             this.networkTransactionService.commit().get();
 188             LOG.info("TAPI SIPs merged successfully.");
 189         } catch (InterruptedException | ExecutionException e) {
 190             LOG.error("Failed to merge TAPI SIPs", e);
 191         }
 192     }
 193
 194     public void updateConnectivityContext(Map<ConnectivityServiceKey, ConnectivityService> connServMap,
 195                                           Map<ConnectionKey, Connection> connectionFullMap) {
 196         // TODO: verify this is correct. Should we identify the context IID with the context UUID??
 197         try {
 198             org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext
 199                 connectivityContext = new ConnectivityContextBuilder()
 200                 .setConnectivityService(connServMap)
 201                 .setConnection(connectionFullMap)
 202                 .build();
 203             InstanceIdentifier<org.opendaylight.yang.gen.v1.urn
 204                 .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext> connectivitycontextIID =
 205                     InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 206                         .child(org.opendaylight.yang.gen.v1.urn
 207                             .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext.class)
 208                         .build();
 209             // merge in datastore
 210             this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, connectivitycontextIID,
 211                 connectivityContext);
 212             this.networkTransactionService.commit().get();
 213             LOG.info("TAPI connectivity merged successfully.");
 214         } catch (InterruptedException | ExecutionException e) {
 215             LOG.error("Failed to merge TAPI connectivity", e);
 216         }
 217     }
 218
 219     public void updateTopologyWithCep(Uuid topoUuid, Uuid nodeUuid, Uuid nepUuid, ConnectionEndPoint cep) {
 220         // TODO: verify this is correct. Should we identify the context IID with the context UUID??
 221         InstanceIdentifier<OwnedNodeEdgePoint> onepIID = InstanceIdentifier.builder(Context.class)
 222             .augmentation(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.Context1.class)
 223             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.context.TopologyContext.class)
 224             .child(Topology.class, new TopologyKey(topoUuid))
 225             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.Node.class,
 226                     new NodeKey(nodeUuid))
 227             .child(OwnedNodeEdgePoint.class, new OwnedNodeEdgePointKey(nepUuid))
 228             .build();
 229         try {
 230             Optional<OwnedNodeEdgePoint> optionalOnep = this.networkTransactionService.read(
 231                     LogicalDatastoreType.OPERATIONAL, onepIID).get();
 232             if (!optionalOnep.isPresent()) {
 233                 LOG.error("ONEP is not present in datastore");
 234                 return;
 235             }
 236             OwnedNodeEdgePoint onep = optionalOnep.orElseThrow();
 237             LOG.info("ONEP found = {}", onep);
 238             // TODO -> If cep exists -> skip merging to datasore
 239             OwnedNodeEdgePoint1 onep1 = onep.augmentation(OwnedNodeEdgePoint1.class);
 240             if (onep1 != null && onep1.getCepList() != null && onep1.getCepList().getConnectionEndPoint() != null
 241                     && onep1.getCepList().getConnectionEndPoint().containsKey(new ConnectionEndPointKey(cep.key()))) {
 242                 LOG.info("CEP already in topology, skipping merge");
 243                 return;
 244             }
 245             // Updated ONEP
 246             CepList cepList = new CepListBuilder().setConnectionEndPoint(Map.of(cep.key(), cep)).build();
 247             OwnedNodeEdgePoint1 onep1Bldr = new OwnedNodeEdgePoint1Builder().setCepList(cepList).build();
 248             OwnedNodeEdgePoint newOnep = new OwnedNodeEdgePointBuilder(onep)
 249                     .addAugmentation(onep1Bldr)
 250                     .build();
 251             LOG.info("New ONEP is {}", newOnep);
 252             // merge in datastore
 253             this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, onepIID,
 254                     newOnep);
 255             this.networkTransactionService.commit().get();
 256             LOG.info("CEP added successfully.");
 257         } catch (InterruptedException | ExecutionException e) {
 258             LOG.error("Couldnt update cep in topology", e);
 259         }
 260     }
 261
 262     public Node getTapiNode(Uuid topoUuid, Uuid nodeUuid) {
 263         InstanceIdentifier<Node> nodeIID = InstanceIdentifier.builder(Context.class)
 264             .augmentation(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.Context1.class)
 265             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.context.TopologyContext.class)
 266             .child(Topology.class, new TopologyKey(topoUuid))
 267             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.Node.class,
 268                         new NodeKey(nodeUuid)).build();
 269         try {
 270             Optional<Node> optNode = this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, nodeIID)
 271                     .get();
 272             if (!optNode.isPresent()) {
 273                 LOG.error(NODE_NOT_PRESENT);
 274                 return null;
 275             }
 276             // TODO -> Need to remove CEPs from NEPs. If not error from get Topology details output
 277             Node node = optNode.orElseThrow();
 278             LOG.debug("NEPs of node before creating map to be returned to the getTapiNode function = {}",
 279                 node.getOwnedNodeEdgePoint().size());
 280             Map<OwnedNodeEdgePointKey, OwnedNodeEdgePoint> onepMap = new HashMap<>();
 281             for (OwnedNodeEdgePoint onep: node.getOwnedNodeEdgePoint().values()) {
 282                 if (onep.augmentation(OwnedNodeEdgePoint1.class) == null) {
 283                     onepMap.put(onep.key(), onep);
 284                     continue;
 285                 }
 286                 OwnedNodeEdgePointBuilder newOnepBuilder = new OwnedNodeEdgePointBuilder()
 287                     .setUuid(onep.getUuid())
 288                     .setLayerProtocolName(onep.getLayerProtocolName())
 289                     .setName(onep.getName())
 290                     .setSupportedCepLayerProtocolQualifierInstances(
 291                         onep.getSupportedCepLayerProtocolQualifierInstances())
 292                     .setAdministrativeState(onep.getAdministrativeState())
 293                     .setOperationalState(onep.getOperationalState())
 294                     .setLifecycleState(onep.getLifecycleState())
 295 //                    .setTerminationDirection(onep.getTerminationDirection())
 296 //                    .setTerminationState(onep.getTerminationState())
 297                     .setDirection(onep.getDirection())
 298                     .setLinkPortRole(onep.getLinkPortRole());
 299                 if (onep.getMappedServiceInterfacePoint() != null) {
 300                     newOnepBuilder.setMappedServiceInterfacePoint(onep.getMappedServiceInterfacePoint());
 301                 }
 302                 OwnedNodeEdgePoint newOnep = newOnepBuilder.build();
 303                 onepMap.put(newOnep.key(), newOnep);
 304             }
 305             LOG.debug("NEPs of node after creating map to be returned to the getTapiNode function = {}",
 306                 onepMap.size());
 307             return new NodeBuilder(node)
 308                 .setOwnedNodeEdgePoint(onepMap)
 309                 .build();
 310         } catch (InterruptedException | ExecutionException e) {
 311             LOG.error("Couldnt read node in topology", e);
 312             return null;
 313         }
 314     }
 315
 316     public OwnedNodeEdgePoint getTapiNEP(Uuid topoUuid, Uuid nodeUuid, Uuid nepUuid) {
 317         InstanceIdentifier<OwnedNodeEdgePoint> nepIID = InstanceIdentifier.builder(Context.class)
 318             .augmentation(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.Context1.class)
 319             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.context.TopologyContext.class)
 320             .child(Topology.class, new TopologyKey(topoUuid))
 321             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.Node.class,
 322                 new NodeKey(nodeUuid)).child(OwnedNodeEdgePoint.class, new OwnedNodeEdgePointKey(nepUuid)).build();
 323         try {
 324             Optional<OwnedNodeEdgePoint> optNode = this.networkTransactionService
 325                     .read(LogicalDatastoreType.OPERATIONAL, nepIID)
 326                     .get();
 327             if (!optNode.isPresent()) {
 328                 LOG.error(NODE_NOT_PRESENT);
 329                 return null;
 330             }
 331             return optNode.orElseThrow();
 332         } catch (InterruptedException | ExecutionException e) {
 333             LOG.error("Couldnt read NEP in topology", e);
 334             return null;
 335         }
 336     }
 337
 338     public Link getTapiLink(Uuid topoUuid, Uuid linkUuid) {
 339         InstanceIdentifier<Link> linkIID = InstanceIdentifier.builder(Context.class)
 340             .augmentation(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.Context1.class)
 341             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.context.TopologyContext.class)
 342             .child(Topology.class, new TopologyKey(topoUuid))
 343             .child(Link.class, new LinkKey(linkUuid)).build();
 344         try {
 345             Optional<Link> optLink = this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, linkIID)
 346                     .get();
 347             if (!optLink.isPresent()) {
 348                 LOG.error(NODE_NOT_PRESENT);
 349                 return null;
 350             }
 351             return optLink.orElseThrow();
 352         } catch (InterruptedException | ExecutionException e) {
 353             LOG.error("Couldnt read link in topology", e);
 354             return null;
 355         }
 356     }
 357
 358     public Map<TopologyKey, Topology> getTopologyContext() {
 359         InstanceIdentifier<TopologyContext> topologycontextIID =
 360                 InstanceIdentifier.builder(Context.class).augmentation(org.opendaylight.yang.gen.v1.urn
 361                         .onf.otcc.yang.tapi.topology.rev221121.Context1.class)
 362                         .child(TopologyContext.class)
 363                         .build();
 364         try {
 365             Optional<TopologyContext> optTopoContext = this.networkTransactionService.read(
 366                     LogicalDatastoreType.OPERATIONAL, topologycontextIID).get();
 367             if (!optTopoContext.isPresent()) {
 368                 LOG.error("Topology context is not present in datastore");
 369                 return null;
 370             }
 371             return optTopoContext.orElseThrow().getTopology();
 372         } catch (InterruptedException | ExecutionException e) {
 373             LOG.error("Couldnt read topology context", e);
 374             return null;
 375         }
 376     }
 377
 378     public ConnectivityService getConnectivityService(Uuid serviceUuid) {
 379         try {
 380             // First read connectivity service with service uuid and update info
 381             InstanceIdentifier<ConnectivityService> connectivityServIID =
 382                 InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 383                     .child(org.opendaylight.yang.gen.v1.urn
 384                         .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext.class)
 385                     .child(ConnectivityService.class, new ConnectivityServiceKey(serviceUuid))
 386                     .build();
 387
 388             Optional<ConnectivityService> optConnServ =
 389                 this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connectivityServIID).get();
 390             if (!optConnServ.isPresent()) {
 391                 LOG.error("Connectivity service not found in tapi context");
 392                 return null;
 393             }
 394             return optConnServ.orElseThrow();
 395         } catch (InterruptedException | ExecutionException e) {
 396             LOG.error("Connectivity service not found in tapi context. Error:", e);
 397             return null;
 398         }
 399     }
 400
 401     public void deleteConnectivityService(Uuid serviceUuid) {
 402         // TODO: handle case where the infrastructure service is removed before the top level service?
 403         ConnectivityService connectivityService = getConnectivityService(serviceUuid);
 404         if (connectivityService == null) {
 405             LOG.error("Service doesnt exist in tapi context");
 406             return;
 407         }
 408         for (org.opendaylight.yang.gen.v1
 409                 .urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.service.Connection connection:
 410                     connectivityService.getConnection().values()) {
 411             deleteConnection(connection.getConnectionUuid(), serviceUuid, connectivityService.getLayerProtocolName());
 412         }
 413         InstanceIdentifier<ConnectivityService> connectivityServIID =
 414                 InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 415                         .child(org.opendaylight.yang.gen.v1.urn
 416                                 .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext.class)
 417                         .child(ConnectivityService.class, new ConnectivityServiceKey(serviceUuid))
 418                         .build();
 419         try {
 420             this.networkTransactionService.delete(LogicalDatastoreType.OPERATIONAL, connectivityServIID);
 421             this.networkTransactionService.commit().get();
 422             LOG.info("Connectivity service deleted");
 423         } catch (InterruptedException | ExecutionException e) {
 424             LOG.error("Failed to delete Connectivity service", e);
 425         }
 426     }
 427
 428     private void deleteConnection(Uuid connectionUuid, Uuid serviceUuid, LayerProtocolName serviceLayer) {
 429         // First read connectivity service with service uuid and update info
 430         InstanceIdentifier<org.opendaylight.yang.gen.v1
 431             .urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.Connection> connectionIID =
 432             InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 433                 .child(org.opendaylight.yang.gen.v1.urn
 434                     .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext.class)
 435                 .child(org.opendaylight.yang.gen.v1.urn
 436                         .onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.Connection.class,
 437                     new org.opendaylight.yang.gen.v1.urn
 438                         .onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.ConnectionKey(
 439                         connectionUuid))
 440                 .build();
 441         Connection connection = getConnection(connectionUuid);
 442         if (connection != null && isNotUsedByOtherService(connection, serviceUuid)) {
 443             Map<LowerConnectionKey, LowerConnection> lowerConnectionMap = connection.getLowerConnection();
 444             if (lowerConnectionMap != null) {
 445                 for (LowerConnection lowerConnection:lowerConnectionMap.values()) {
 446                     // check layer of connection, for DSR service we only need to delete DSR layer
 447                     // connection and XC at ODU. For ODU, only need to delete ODU connections and for
 448                     // photonic media services all the photonic media. And when it is ETH we need to delete
 449                     // everything and also without checking the lower connection layer
 450                     Connection conn1 = getConnection(lowerConnection.getConnectionUuid());
 451                     if (conn1 == null) {
 452                         // connection not found in tapi context
 453                         continue;
 454                     }
 455                     LayerProtocolName lowerConnLayer = conn1.getLayerProtocolName();
 456                     switch (serviceLayer.getIntValue()) {
 457                         case 0:
 458                         case 3:
 459                             // PHOTONIC & ODU
 460                             if (lowerConnLayer.equals(serviceLayer)) {
 461                                 deleteConnection(lowerConnection.getConnectionUuid(), serviceUuid, serviceLayer);
 462                             }
 463                             break;
 464                         case 1:
 465                             // ETH
 466                             deleteConnection(lowerConnection.getConnectionUuid(), serviceUuid, serviceLayer);
 467                             break;
 468                         case 2:
 469                             // DSR
 470                             if (lowerConnLayer.equals(serviceLayer) || (lowerConnLayer.equals(LayerProtocolName.ODU)
 471                                     && conn1.getName().values().stream().anyMatch(
 472                                             name -> name.getValue().contains("XC")))) {
 473                                 deleteConnection(lowerConnection.getConnectionUuid(), serviceUuid, serviceLayer);
 474                             }
 475                             break;
 476                         default:
 477                             LOG.info("Unknown service Layer: {}", serviceLayer.getName());
 478                     }
 479                 }
 480             }
 481         }
 482         try {
 483             this.networkTransactionService.delete(LogicalDatastoreType.OPERATIONAL, connectionIID);
 484             this.networkTransactionService.commit().get();
 485         } catch (InterruptedException | ExecutionException e) {
 486             LOG.error("Failed to delete TAPI Connection", e);
 487         }
 488     }
 489
 490     private boolean isNotUsedByOtherService(Connection connection, Uuid serviceUuid) {
 491         Map<ConnectivityServiceKey, ConnectivityService> connServicesMap = getConnectivityServices();
 492         if (connServicesMap == null) {
 493             LOG.info("isNotUsedByOtherService: No service in tapi context!");
 494             return true;
 495         }
 496         for (ConnectivityService connService: connServicesMap.values()) {
 497             if (connService.getConnection() == null || connService.getUuid().equals(serviceUuid)) {
 498                 LOG.info("isNotUsedByOtherService: There are no connections in service {} or service in loop is the "
 499                         + "service to be deleted", connService.getUuid().getValue());
 500                 continue;
 501             }
 502             if (connService.getConnection().containsKey(
 503                     new org.opendaylight.yang.gen.v1
 504                         .urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.service.ConnectionKey(
 505                             connection.getUuid()))) {
 506                 LOG.info("isNotUsedByOtherService: Connection {} is in used by service {}. Cannot remove it from "
 507                         + "context", connection.getUuid().getValue(), connService.getUuid().getValue());
 508                 return false;
 509             }
 510             LOG.info("isNotUsedByOtherService: Going to check lower connections");
 511             for (org.opendaylight.yang.gen.v1.urn
 512                         .onf.otcc.yang.tapi.connectivity.rev221121.connectivity.service.Connection
 513                     conn:connService.getConnection().values()) {
 514                 Connection connection1 = getConnection(conn.getConnectionUuid());
 515                 if (connection1 == null || connection1.getLowerConnection() == null) {
 516                     continue;
 517                 }
 518                 if (connection1.getLowerConnection().containsKey(new LowerConnectionKey(connection.getUuid()))) {
 519                     LOG.info("isNotUsedByOtherService: Lower Connection {} is in used by service {}. Cannot remove it "
 520                             + "from context", connection.getUuid().getValue(), connService.getUuid().getValue());
 521                     return false;
 522                 }
 523             }
 524         }
 525         LOG.info("isNotUsedByOtherService: No other service uses connection {}, therefore it can be safely deleted",
 526                 connection.getUuid());
 527         return true;
 528     }
 529
 530     public Connection getConnection(Uuid connectionUuid) {
 531         try {
 532             // First read connectivity service with service uuid and update info
 533             InstanceIdentifier<Connection> connIID =
 534                 InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 535                     .child(org.opendaylight.yang.gen.v1.urn
 536                         .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext.class)
 537                     .child(Connection.class, new ConnectionKey(connectionUuid))
 538                     .build();
 539
 540             Optional<Connection> optConn =
 541                 this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connIID).get();
 542             if (!optConn.isPresent()) {
 543                 LOG.error("Connection not found in tapi context");
 544                 return null;
 545             }
 546             return optConn.orElseThrow();
 547         } catch (InterruptedException | ExecutionException e) {
 548             LOG.error("Connection not found in tapi context. Error:", e);
 549             return null;
 550         }
 551     }
 552
 553     public Map<ConnectivityServiceKey, ConnectivityService> getConnectivityServices() {
 554         try {
 555             // First read connectivity service with service uuid and update info
 556             InstanceIdentifier<org.opendaylight.yang.gen.v1.urn
 557                 .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext> connectivityContextIID =
 558                 InstanceIdentifier.builder(Context.class).augmentation(Context1.class)
 559                     .child(org.opendaylight.yang.gen.v1.urn
 560                         .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext.class)
 561                     .build();
 562
 563             Optional<org.opendaylight.yang.gen.v1.urn
 564                 .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext> optConnContext =
 565                     this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connectivityContextIID)
 566                         .get();
 567             if (!optConnContext.isPresent()) {
 568                 LOG.error("Connectivity context not found in tapi context");
 569                 return null;
 570             }
 571             return optConnContext.orElseThrow().getConnectivityService();
 572         } catch (InterruptedException | ExecutionException e) {
 573             LOG.error("Connectivity context not found in tapi context. Error:", e);
 574             return null;
 575         }
 576     }
 577
 578     public ConnectionEndPoint getTapiCEP(Uuid topoUuid, Uuid nodeUuid, Uuid nepUuid, Uuid cepUuid) {
 579         InstanceIdentifier<OwnedNodeEdgePoint> nepIID = InstanceIdentifier.builder(Context.class)
 580             .augmentation(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.Context1.class)
 581             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.context.TopologyContext.class)
 582             .child(Topology.class, new TopologyKey(topoUuid))
 583             .child(org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.Node.class,
 584                 new NodeKey(nodeUuid)).child(OwnedNodeEdgePoint.class, new OwnedNodeEdgePointKey(nepUuid)).build();
 585         try {
 586             Optional<OwnedNodeEdgePoint> optNode = this.networkTransactionService
 587                 .read(LogicalDatastoreType.OPERATIONAL, nepIID).get();
 588             if (!optNode.isPresent()) {
 589                 LOG.error(NODE_NOT_PRESENT);
 590                 return null;
 591             }
 592             if (optNode.orElseThrow().augmentation(OwnedNodeEdgePoint1.class) == null) {
 593                 LOG.error("Node doesnt have ceps");
 594                 return null;
 595             }
 596             return optNode.orElseThrow().augmentation(OwnedNodeEdgePoint1.class).getCepList().getConnectionEndPoint()
 597                 .get(new ConnectionEndPointKey(cepUuid));
 598         } catch (InterruptedException | ExecutionException e) {
 599             LOG.error("Couldnt read node in topology", e);
 600             return null;
 601         }
 602     }
 603 }