tapi/src/main/java/org/opendaylight/transportpce/tapi/listeners/TapiNetworkModelNotificationHandler.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.listeners;
   9
  10 import java.nio.charset.StandardCharsets;
  11 import java.time.OffsetDateTime;
  12 import java.time.ZoneOffset;
  13 import java.time.format.DateTimeFormatter;
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.Collections;
  17 import java.util.HashMap;
  18 import java.util.List;
  19 import java.util.Map;
  20 import java.util.Objects;
  21 import java.util.Optional;
  22 import java.util.Set;
  23 import java.util.UUID;
  24 import java.util.concurrent.ExecutionException;
  25 import java.util.stream.Collectors;
  26 import org.opendaylight.mdsal.binding.api.NotificationPublishService;
  27 import org.opendaylight.mdsal.binding.api.NotificationService.CompositeListener;
  28 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  29 import org.opendaylight.transportpce.common.network.NetworkTransactionService;
  30 import org.opendaylight.transportpce.tapi.TapiStringConstants;
  31 import org.opendaylight.yang.gen.v1.http.org.openroadm.common.state.types.rev191129.State;
  32 import org.opendaylight.yang.gen.v1.nbi.notifications.rev230728.PublishTapiNotificationService;
  33 import org.opendaylight.yang.gen.v1.nbi.notifications.rev230728.PublishTapiNotificationServiceBuilder;
  34 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.AdministrativeState;
  35 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.Context;
  36 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.DateAndTime;
  37 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.LayerProtocolName;
  38 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.OBJECTTYPETAPICONTEXT;
  39 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.OperationalState;
  40 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.Uuid;
  41 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.global._class.Name;
  42 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.common.rev221121.global._class.NameKey;
  43 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.OwnedNodeEdgePoint1;
  44 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connection.LowerConnection;
  45 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.Connection;
  46 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.ConnectionBuilder;
  47 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.ConnectionKey;
  48 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.ConnectivityService;
  49 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.ConnectivityServiceBuilder;
  50 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.connectivity.context.ConnectivityServiceKey;
  51 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext;
  52 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.EventNotification;
  53 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.NOTIFICATIONTYPEATTRIBUTEVALUECHANGE;
  54 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.NameAndValueChange;
  55 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.Notification;
  56 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.notification.ChangedAttributes;
  57 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.notification.ChangedAttributesBuilder;
  58 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.notification.ChangedAttributesKey;
  59 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.notification.TargetObjectName;
  60 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.notification.TargetObjectNameBuilder;
  61 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.notification.rev221121.notification.TargetObjectNameKey;
  62 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.Context1;
  63 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.NodeEdgePointRef;
  64 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.context.TopologyContext;
  65 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.node.OwnedNodeEdgePoint;
  66 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.node.OwnedNodeEdgePointKey;
  67 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.Node;
  68 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.NodeKey;
  69 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.context.Topology;
  70 import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev221121.topology.context.TopologyKey;
  71 import org.opendaylight.yangtools.yang.binding.EnumTypeObject;
  72 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  73 import org.osgi.service.component.annotations.Activate;
  74 import org.osgi.service.component.annotations.Component;
  75 import org.osgi.service.component.annotations.Reference;
  76 import org.slf4j.Logger;
  77 import org.slf4j.LoggerFactory;
  78
  79 @Component(service = TapiNetworkModelNotificationHandler.class)
  80 public class TapiNetworkModelNotificationHandler {
  81
  82     private static final Logger LOG = LoggerFactory.getLogger(TapiNetworkModelNotificationHandler.class);
  83     private final NetworkTransactionService networkTransactionService;
  84     private final NotificationPublishService notificationPublishService;
  85     private final List<ConnectivityService> connectivityServiceChanges = new ArrayList<>();
  86     private final Uuid tapiTopoUuid = new Uuid(UUID.nameUUIDFromBytes(TapiStringConstants.T0_FULL_MULTILAYER
  87             .getBytes(StandardCharsets.UTF_8)).toString());
  88     private final List<LayerProtocolName> orderedServiceLayerList;
  89
  90     @Activate
  91     public TapiNetworkModelNotificationHandler(@Reference NetworkTransactionService networkTransactionService,
  92             @Reference NotificationPublishService notificationPublishService) {
  93         this.networkTransactionService = networkTransactionService;
  94         this.notificationPublishService = notificationPublishService;
  95         this.orderedServiceLayerList = List.of(LayerProtocolName.PHOTONICMEDIA, LayerProtocolName.ODU,
  96             LayerProtocolName.DSR, LayerProtocolName.ETH);
  97         LOG.debug("TapiNetworkModelListenerImpl instantiated");
  98     }
  99
 100     public CompositeListener getCompositeListener() {
 101         return new CompositeListener(Set.of(
 102             new CompositeListener.Component<>(Notification.class, this::onNotification)));
 103     }
 104
 105     private void onNotification(Notification notification) {
 106         LOG.info("Received network model notification {}", notification);
 107         if (notification.getNotificationType().equals(NOTIFICATIONTYPEATTRIBUTEVALUECHANGE.VALUE)
 108                 && notification.getTargetObjectType().equals(OBJECTTYPETAPICONTEXT.VALUE)) {
 109             if (notification.getChangedAttributes() == null) {
 110                 return;
 111             }
 112             // TODO: need to re-think this to update first the connections from roadm to roadm and then the others
 113             updateConnections(notification.getChangedAttributes().keySet().stream()
 114                     .map(changedAttributesKey -> new Uuid(changedAttributesKey.getValueName()))
 115                     .collect(Collectors.toList()), notification.getChangedAttributes().values().stream()
 116                     .map(NameAndValueChange::getNewValue)
 117                     .collect(Collectors.toList()));
 118             updateConnectivityServices();
 119             // todo set attributes
 120             for (ConnectivityService connService : this.connectivityServiceChanges) {
 121                 sendNbiNotification(createNbiNotification(connService));
 122             }
 123         }
 124     }
 125
 126     public void onEventNotification(EventNotification notification) {
 127         LOG.info("Received network model notification {}", notification);
 128         //TODO: see if implementation needed as this is declared as obsolete
 129     }
 130
 131     private PublishTapiNotificationService createNbiNotification(ConnectivityService connService) {
 132         if (connService == null) {
 133             LOG.error("ConnService is null");
 134             return null;
 135         }
 136         Map<ChangedAttributesKey, ChangedAttributes> changedStates = new HashMap<>();
 137         changedStates.put(new ChangedAttributesKey("administrativeState"),
 138             new ChangedAttributesBuilder()
 139                 .setNewValue(connService.getAdministrativeState().getName())
 140                 .setOldValue(connService.getAdministrativeState().equals(AdministrativeState.UNLOCKED)
 141                     ? AdministrativeState.LOCKED.getName() : AdministrativeState.UNLOCKED.getName())
 142                 .setValueName("administrativeState").build());
 143         changedStates.put(new ChangedAttributesKey("operationalState"),
 144             new ChangedAttributesBuilder()
 145                 .setNewValue(connService.getOperationalState().getName())
 146                 .setOldValue(connService.getOperationalState().equals(OperationalState.ENABLED)
 147                     ? OperationalState.DISABLED.getName() : OperationalState.ENABLED.getName())
 148                 .setValueName("operationalState").build());
 149         DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ssxxx");
 150         OffsetDateTime offsetDateTime = OffsetDateTime.now(ZoneOffset.UTC);
 151         DateAndTime datetime = new DateAndTime(dtf.format(offsetDateTime));
 152         Map<TargetObjectNameKey, TargetObjectName> targetObjectNames = new HashMap<>();
 153         if (connService.getName() != null) {
 154             for (Map.Entry<NameKey, Name> entry : connService.getName().entrySet()) {
 155                 targetObjectNames.put(new TargetObjectNameKey(entry.getKey().getValueName()),
 156                     new TargetObjectNameBuilder()
 157                         .setValueName(entry.getValue().getValueName())
 158                         .setValue(entry.getValue().getValue())
 159                         .build());
 160             }
 161         }
 162
 163         return new PublishTapiNotificationServiceBuilder()
 164             .setUuid(new Uuid(UUID.randomUUID().toString()))
 165             .setTopic(connService.getUuid().getValue())
 166             .setTargetObjectIdentifier(connService.getUuid())
 167             .setNotificationType(NOTIFICATIONTYPEATTRIBUTEVALUECHANGE.VALUE)
 168             .setChangedAttributes(changedStates)
 169             .setEventTimeStamp(datetime)
 170             .setTargetObjectName(targetObjectNames)
 171             .setTargetObjectType(OBJECTTYPETAPICONTEXT.VALUE)
 172             .setLayerProtocolName(connService.getLayerProtocolName())
 173             .build();
 174     }
 175
 176     private void sendNbiNotification(PublishTapiNotificationService service) {
 177         try {
 178             this.notificationPublishService.putNotification(service);
 179         } catch (InterruptedException e) {
 180             LOG.warn("Cannot send notification to nbi", e);
 181             Thread.currentThread().interrupt();
 182         }
 183     }
 184
 185     private void updateConnectivityServices() {
 186         try {
 187             this.connectivityServiceChanges.clear();
 188             InstanceIdentifier<ConnectivityContext> connectivityContextIID =
 189                 InstanceIdentifier.builder(Context.class).augmentation(
 190                         org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.Context1.class)
 191                     .child(ConnectivityContext.class)
 192                     .build();
 193             Optional<ConnectivityContext> optConnContext =
 194                 this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connectivityContextIID).get();
 195             if (optConnContext.isEmpty()) {
 196                 LOG.error("Could not update TAPI connectivity services");
 197                 return;
 198             }
 199             ConnectivityContext connContext = optConnContext.orElseThrow();
 200             Map<Uuid, EnumTypeObject[]> states = new HashMap<>();
 201             if (connContext.getConnectivityService() == null) {
 202                 return;
 203             }
 204             for (ConnectivityService connService : connContext.getConnectivityService().values()) {
 205                 LOG.info("Connectivity service = {}", connService);
 206                 // TODO: maybe we need to check lower connections if my new code doesnt work
 207                 states.put(connService.getUuid(), getStates(connService));
 208                 AdministrativeState adminState = (AdministrativeState) states.get(connService.getUuid())[0];
 209                 OperationalState operState = (OperationalState) states.get(connService.getUuid())[1];
 210
 211                 InstanceIdentifier<ConnectivityService> connServIID = InstanceIdentifier
 212                     .builder(Context.class).augmentation(org.opendaylight.yang.gen.v1
 213                                 .urn.onf.otcc.yang.tapi.connectivity.rev221121.Context1.class)
 214                     .child(ConnectivityContext.class)
 215                     .child(ConnectivityService.class, new ConnectivityServiceKey(connService.getUuid()))
 216                     .build();
 217                 ConnectivityService changedConnServ = new ConnectivityServiceBuilder()
 218                     .setUuid(connService.getUuid())
 219                     .setAdministrativeState(adminState)
 220                     .setOperationalState(operState)
 221                     .build();
 222                 this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, connServIID,
 223                     changedConnServ);
 224                 this.networkTransactionService.commit().get();
 225
 226                 if (connService.getAdministrativeState() != adminState
 227                     || connService.getOperationalState() != operState) {
 228                     this.connectivityServiceChanges.add(changedConnServ);
 229                 }
 230             }
 231             // TODO: this last function may need some refactoring... if the PHOT_MEDIA goes down,
 232             //  then ODU goes down and then DSR should also go down
 233             for (ConnectivityService connService : connContext.getConnectivityService().values()) {
 234                 AdministrativeState adminState = (AdministrativeState) states.get(connService.getUuid())[0];
 235                 OperationalState operState = (OperationalState) states.get(connService.getUuid())[1];
 236                 this.connectivityServiceChanges.addAll(updateSupportedConnectivityServices(
 237                     connContext.getConnectivityService().values(), connService.getUuid(), adminState, operState,
 238                     LayerProtocolName.ODU));
 239             }
 240         } catch (InterruptedException | ExecutionException e) {
 241             LOG.error("Could not update TAPI connectivity services");
 242         }
 243     }
 244
 245     private EnumTypeObject[] getStates(ConnectivityService connService)
 246             throws InterruptedException, ExecutionException {
 247         OperationalState operState = OperationalState.ENABLED;
 248         AdministrativeState adminState = AdministrativeState.UNLOCKED;
 249         if (connService.getConnection() == null) {
 250             LOG.info("No connections on service = {}", connService);
 251             return new EnumTypeObject[]{null, null};
 252         }
 253         for (org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121
 254                 .connectivity.service.Connection connection : connService.getConnection().values()) {
 255             InstanceIdentifier<Connection> connIID =
 256                 InstanceIdentifier.builder(Context.class).augmentation(org.opendaylight.yang.gen.v1.urn
 257                         .onf.otcc.yang.tapi.connectivity.rev221121.Context1.class)
 258                     .child(ConnectivityContext.class)
 259                     .child(Connection.class, new ConnectionKey(connection.getConnectionUuid()))
 260                     .build();
 261             Optional<Connection> optConn = this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL,
 262                 connIID).get();
 263             if (optConn.isEmpty()) {
 264                 LOG.error("Could not get state for a TAPI connection");
 265                 continue;
 266             }
 267             LOG.info("State of connection {} of connectivity service {} = {}", optConn.orElseThrow().getUuid()
 268                 .getValue(), connService.getUuid().getValue(), optConn.orElseThrow().getOperationalState().getName());
 269             if (optConn.orElseThrow().getOperationalState() == OperationalState.DISABLED) {
 270                 adminState = AdministrativeState.LOCKED;
 271                 operState = OperationalState.DISABLED;
 272             }
 273         }
 274         return new EnumTypeObject[]{adminState, operState};
 275     }
 276
 277     private void updateConnections(List<Uuid> changedOneps, List<String> onepStates) {
 278         LOG.info("Updating TAPI connections");
 279         LOG.info("Change in oneps = {}, new states = {}", changedOneps, onepStates);
 280         try {
 281             //should it return a list of connections?
 282             InstanceIdentifier<org.opendaylight.yang.gen.v1.urn
 283                     .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext> connectivityContextIID =
 284                 InstanceIdentifier.builder(Context.class).augmentation(
 285                             org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121.Context1.class)
 286                         .child(org.opendaylight.yang.gen.v1.urn
 287                                 .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext.class)
 288                         .build();
 289             Optional<org.opendaylight.yang.gen.v1.urn
 290                     .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext> optConnContext =
 291                 this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connectivityContextIID).get();
 292             if (optConnContext.isEmpty()) {
 293                 LOG.error(TapiStringConstants.TAPI_CONNECTION_UPDATE_ERROR);
 294                 return;
 295             }
 296             if (optConnContext.orElseThrow().getConnectivityService() == null) {
 297                 LOG.info("No TAPI connectivity service to update");
 298                 return;
 299             }
 300             // TODO: order services from lower layer to upper layer
 301             Map<ConnectivityServiceKey, ConnectivityService> connServMap
 302                     = optConnContext.orElseThrow().getConnectivityService();
 303             if (connServMap == null) {
 304                 LOG.info("No connections to update");
 305                 return;
 306             }
 307             connServMap = orderConnServiceMap(connServMap);
 308             for (ConnectivityService connService : connServMap.values()) {
 309                 LOG.info("Looping through connectivity service = {}", connService.getUuid().getValue());
 310                 if (connService.getConnection() == null) {
 311                     continue;
 312                 }
 313                 for (org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.connectivity.rev221121
 314                         .connectivity.service.Connection connection : connService.getConnection().values()) {
 315                     InstanceIdentifier<Connection> connIID =
 316                         InstanceIdentifier.builder(Context.class).augmentation(org.opendaylight.yang.gen.v1.urn
 317                             .onf.otcc.yang.tapi.connectivity.rev221121.Context1.class)
 318                                 .child(org.opendaylight.yang.gen.v1.urn
 319                                         .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext.class)
 320                                 .child(Connection.class, new ConnectionKey(connection.getConnectionUuid()))
 321                                 .build();
 322                     Optional<Connection> optConn =
 323                         this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connIID).get();
 324                     if (optConn.isEmpty()) {
 325                         LOG.error(TapiStringConstants.TAPI_CONNECTION_READ_ERROR);
 326                         continue;
 327                     }
 328                     Connection newConn = optConn.orElseThrow();
 329                     // Check LowerConnection states and if any of the lower connection is disabled then we can put
 330                     // the connection out of service. And based on the connection previous state we decide
 331                     // the update necessary
 332                     OperationalState newConnState = newConn.getOperationalState();
 333                     if (newConn.getLowerConnection() != null) {
 334                         newConnState = updateLowerConnections(changedOneps, onepStates,
 335                                 newConn.getLowerConnection().values(), newConn.getOperationalState());
 336                     }
 337                     if (newConnState.equals(newConn.getOperationalState())) {
 338                         // To check if the oneps are from the original Top connection
 339                         newConnState = getConnectionState(changedOneps, onepStates, newConn);
 340                     }
 341
 342                     LOG.info("Previous connection state = {} & New connection state = {}",
 343                             newConn.getOperationalState().getName(), newConnState.getName());
 344                     Connection changedConn = new ConnectionBuilder(newConn).setOperationalState(newConnState).build();
 345                     // TODO: the changed NEP is a DEG port which is not in any connection,
 346                     //  therefore we also need to change the cross connections,
 347                     //  the lower connections uuid and check the states.
 348                     //  If any of the lower connections of a connection is DISABLED then the top connection is DISABLED
 349                     this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, connIID, changedConn);
 350                     this.networkTransactionService.commit().get();
 351                 }
 352             }
 353         } catch (InterruptedException | ExecutionException e) {
 354             LOG.error(TapiStringConstants.TAPI_CONNECTION_UPDATE_ERROR);
 355         }
 356     }
 357
 358     private Map<ConnectivityServiceKey, ConnectivityService> orderConnServiceMap(
 359             Map<ConnectivityServiceKey, ConnectivityService> connServMap) {
 360         Map<ConnectivityServiceKey, ConnectivityService> orderedServiceMap = new HashMap<>();
 361         for (LayerProtocolName lpn:this.orderedServiceLayerList) {
 362             for (ConnectivityService connServ:connServMap.values()) {
 363                 if (connServ.getLayerProtocolName().equals(lpn)) {
 364                     LOG.info("Layer of service is equal to entry of lpn = {}", lpn);
 365                     orderedServiceMap.put(connServ.key(), connServ);
 366                 }
 367             }
 368         }
 369         LOG.info("Ordered map of services = {}", orderedServiceMap);
 370         return orderedServiceMap;
 371     }
 372
 373     private OperationalState updateLowerConnections(List<Uuid> changedOneps, List<String> onepStates,
 374                                                     Collection<LowerConnection> lowerConnections,
 375                                                     OperationalState uppConnState) {
 376         LOG.info("Updating lower connections");
 377         OperationalState topConnectionState = uppConnState;
 378         Boolean allLowerConnEna = true;
 379         try {
 380             for (LowerConnection lowerConn:lowerConnections) {
 381                 InstanceIdentifier<Connection> connIID =
 382                     InstanceIdentifier.builder(Context.class).augmentation(org.opendaylight.yang.gen.v1.urn
 383                         .onf.otcc.yang.tapi.connectivity.rev221121.Context1.class)
 384                             .child(org.opendaylight.yang.gen.v1.urn
 385                                     .onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext.class)
 386                             .child(Connection.class, new ConnectionKey(lowerConn.getConnectionUuid()))
 387                             .build();
 388                 Optional<Connection> optConn =
 389                         this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connIID).get();
 390                 if (optConn.isEmpty()) {
 391                     LOG.error(TapiStringConstants.TAPI_CONNECTION_READ_ERROR);
 392                     continue;
 393                 }
 394                 Connection newConn = optConn.orElseThrow(); // Current state of connection
 395                 if (newConn.getLowerConnection() != null) {
 396                     // TODO: we can receive disable here because the lower connection haven been yet looped through and
 397                     //  therefore it is disabled but it has to be changed to enable before returning disable.
 398                     //  We need to recall the update Lower Connections with the lower connection we are checking now
 399                     //  and all its lower connections, until no lower connections are found in the connection
 400                     updateLowerConnections(changedOneps, onepStates, newConn.getLowerConnection().values(),
 401                             newConn.getOperationalState());
 402                 }
 403                 OperationalState newConnState = getConnectionState(changedOneps, onepStates, newConn);
 404                 // updated connection state if it contains a nep that has changed
 405                 if (!newConn.getOperationalState().equals(newConnState)) {
 406                     Connection changedConn = new ConnectionBuilder(newConn).setOperationalState(newConnState).build();
 407                     this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, connIID, changedConn);
 408                     this.networkTransactionService.commit().get();
 409                 }
 410                 if (newConnState.equals(OperationalState.DISABLED)) {
 411                     LOG.info("LowerConnection state is disable");
 412                     allLowerConnEna = false;
 413                     topConnectionState = OperationalState.DISABLED;
 414                 }
 415             }
 416             if (allLowerConnEna) {
 417                 return OperationalState.ENABLED;
 418             }
 419             return OperationalState.DISABLED;
 420         } catch (InterruptedException | ExecutionException e) {
 421             LOG.error(TapiStringConstants.TAPI_CONNECTION_UPDATE_ERROR);
 422             return topConnectionState;
 423         }
 424     }
 425
 426     private OperationalState getConnectionState(List<Uuid> changedOneps, List<String> operState, Connection conn)
 427             throws InterruptedException, ExecutionException {
 428         LOG.info("Getting TAPI connectionState");
 429         List<Uuid> connectionNeps = Objects.requireNonNull(conn.getConnectionEndPoint()).values().stream()
 430             .map(NodeEdgePointRef::getNodeEdgePointUuid).collect(Collectors.toList());
 431         LOG.info("Changed neps = {}", changedOneps);
 432         LOG.info("Connection NEPs = {}", connectionNeps);
 433         if (!Collections.disjoint(changedOneps, connectionNeps)) {
 434             LOG.info("Connection neps {} are included in changed oneps {}", connectionNeps, changedOneps);
 435             if ((changedOneps.contains(connectionNeps.get(0)) ? transformOperState(operState.get(
 436                     changedOneps.indexOf(connectionNeps.get(0)))) : null) == OperationalState.DISABLED
 437                         || (changedOneps.contains(connectionNeps.get(1)) ? transformOperState(operState.get(
 438                                 changedOneps.indexOf(connectionNeps.get(1)))) : null) == OperationalState.DISABLED) {
 439                 return OperationalState.DISABLED;
 440             }
 441             LOG.info("Didnt transform correctly the states");
 442             for (Uuid connectionNep : connectionNeps) {
 443                 Optional<org.opendaylight.yang.gen.v1.urn
 444                         .onf.otcc.yang.tapi.connectivity.rev221121.connection.ConnectionEndPoint> ocep
 445                     = conn.getConnectionEndPoint().values().stream()
 446                         .filter(connectionEndPoint -> connectionEndPoint.getNodeEdgePointUuid() == connectionNep)
 447                         .findFirst();
 448                 if (ocep.isEmpty()) {
 449                     continue;
 450                 }
 451                 InstanceIdentifier<OwnedNodeEdgePoint> onepIID = InstanceIdentifier.builder(Context.class)
 452                     .augmentation(Context1.class).child(TopologyContext.class)
 453                     .child(Topology.class, new TopologyKey(tapiTopoUuid))
 454                     .child(Node.class, new NodeKey(ocep.orElseThrow().getNodeUuid()))
 455                     .child(OwnedNodeEdgePoint.class, new OwnedNodeEdgePointKey(connectionNep))
 456                     .build();
 457                 Optional<OwnedNodeEdgePoint> onep =
 458                     this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, onepIID).get();
 459                 if (onep.isEmpty() || onep.orElseThrow().augmentation(OwnedNodeEdgePoint1.class) == null
 460                         || onep.orElseThrow().augmentation(OwnedNodeEdgePoint1.class).getCepList() == null) {
 461                     continue;
 462                 }
 463                 if (onep.orElseThrow().getOperationalState() == OperationalState.DISABLED
 464                         && !changedOneps.contains(onep.orElseThrow().getUuid())) {
 465                     return OperationalState.DISABLED;
 466                 }
 467             }
 468             return OperationalState.ENABLED;
 469         }
 470         LOG.info("Connection state = {}. Going to check lower connections", conn.getOperationalState());
 471         // TODO --> check all lower connections state and if all of them are enabled we return enable, otherwise disable
 472         if (conn.getLowerConnection() != null && allLowerConEnabled(conn.getLowerConnection().values())) {
 473             return OperationalState.ENABLED;
 474         }
 475         return conn.getOperationalState();
 476     }
 477
 478     private boolean allLowerConEnabled(Collection<LowerConnection> lowerConnections) {
 479         try {
 480             for (LowerConnection lowerConn:lowerConnections) {
 481                 InstanceIdentifier<Connection> connIID =
 482                     InstanceIdentifier.builder(Context.class).augmentation(org.opendaylight.yang.gen.v1.urn
 483                             .onf.otcc.yang.tapi.connectivity.rev221121.Context1.class)
 484                         .child(org.opendaylight.yang.gen.v1.urn
 485                             .onf.otcc.yang.tapi.connectivity.rev221121.context
 486                             .ConnectivityContext.class)
 487                         .child(Connection.class, new ConnectionKey(lowerConn.getConnectionUuid()))
 488                         .build();
 489                 Optional<Connection> optConn =
 490                     this.networkTransactionService.read(LogicalDatastoreType.OPERATIONAL, connIID).get();
 491                 if (optConn.isEmpty()) {
 492                     LOG.error(TapiStringConstants.TAPI_CONNECTION_READ_ERROR);
 493                     continue;
 494                 }
 495                 Connection newConn = optConn.orElseThrow(); // Current state of connection
 496                 // updated connection state if it contains a nep that has changed
 497                 if (newConn.getOperationalState().equals(OperationalState.DISABLED)) {
 498                     LOG.info("LowerConnection state is disable");
 499                     return false;
 500                 }
 501             }
 502             return true;
 503         } catch (InterruptedException | ExecutionException e) {
 504             LOG.error(TapiStringConstants.TAPI_CONNECTION_UPDATE_ERROR);
 505             return false;
 506         }
 507     }
 508
 509     private List<ConnectivityService> updateSupportedConnectivityServices(Collection<ConnectivityService> connServices,
 510                                                                           Uuid supportingConnService,
 511                                                                           AdministrativeState adminState,
 512                                                                           OperationalState operState,
 513                                                                           LayerProtocolName layer) {
 514         // TODO we need to check this function
 515         List<ConnectivityService> changedServices = new ArrayList<>();
 516         if (adminState != AdministrativeState.LOCKED && operState != OperationalState.DISABLED) {
 517             return changedServices;
 518         }
 519         try {
 520             for (ConnectivityService supportedConnService : connServices) {
 521                 // TODO currently supporting service uuid is saved in service layer, replace with name as soon
 522                 // as name is implemented
 523                 if (supportedConnService.getLayerProtocolName() != layer) {
 524                     continue;
 525                 }
 526                 InstanceIdentifier<ConnectivityService> supportedConnServIID = InstanceIdentifier
 527                     .builder(Context.class).augmentation(org.opendaylight.yang.gen.v1
 528                         .urn.onf.otcc.yang.tapi.connectivity.rev221121.Context1.class)
 529                     .child(org.opendaylight.yang.gen.v1
 530                         .urn.onf.otcc.yang.tapi.connectivity.rev221121.context.ConnectivityContext.class)
 531                     .child(ConnectivityService.class, new ConnectivityServiceKey(supportedConnService.getUuid()))
 532                     .build();
 533                 Optional<ConnectivityService> optNewConnService = this.networkTransactionService.read(
 534                     LogicalDatastoreType.OPERATIONAL, supportedConnServIID).get();
 535                 if (optNewConnService.isEmpty()) {
 536                     LOG.error("Could not update TAPI connectivity service");
 537                     continue;
 538                 }
 539                 ConnectivityService newConnService = optNewConnService.orElseThrow();
 540                 if (supportedConnService.getConnectivityConstraint().getServiceLevel() != null
 541                         && supportedConnService.getConnectivityConstraint().getServiceLevel()
 542                             .equals(supportingConnService.getValue())
 543                         && newConnService.getAdministrativeState() != AdministrativeState.LOCKED
 544                         && newConnService.getOperationalState() != OperationalState.DISABLED) {
 545
 546                     ConnectivityService changedSupportedConnServ = new ConnectivityServiceBuilder()
 547                         .setUuid(supportedConnService.getUuid())
 548                         .setAdministrativeState(adminState)
 549                         .setOperationalState(operState)
 550                         .build();
 551                     // TODO: may need to update connections...
 552                     this.networkTransactionService.merge(LogicalDatastoreType.OPERATIONAL, supportedConnServIID,
 553                         changedSupportedConnServ);
 554                     this.networkTransactionService.commit().get();
 555                     changedServices.add(changedSupportedConnServ);
 556                     if (layer == LayerProtocolName.ODU) {
 557                         changedServices.addAll(updateSupportedConnectivityServices(connServices,
 558                             supportedConnService.getUuid(), adminState, operState, LayerProtocolName.DSR));
 559                     }
 560                 }
 561             }
 562         } catch (InterruptedException | ExecutionException e) {
 563             LOG.error("Could not update TAPI connectivity service");
 564         }
 565         return changedServices;
 566     }
 567
 568     private OperationalState transformOperState(String operString) {
 569         LOG.debug("Operstring to be converted = {}", operString);
 570         State operState = org.opendaylight.transportpce.networkmodel.util.TopologyUtils.setNetworkOperState(operString);
 571         LOG.debug("State received from topologyutils = {}", operState);
 572         return operState.equals(State.InService) ? OperationalState.ENABLED : OperationalState.DISABLED;
 573     }
 574
 575 }