restconf/restconf-nb-rfc8040/src/main/java/org/opendaylight/restconf/nb/rfc8040/rests/services/impl/RestconfDataServiceImpl.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, 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.restconf.nb.rfc8040.rests.services.impl;
   9
  10 import static java.util.Objects.requireNonNull;
  11 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.INSERT;
  12 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.POINT;
  13 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.NOTIFICATION_STREAM;
  14 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAMS_PATH;
  15 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_ACCESS_PATH_PART;
  16 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_LOCATION_PATH_PART;
  17 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_PATH;
  18 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_PATH_PART;
  19
  20 import com.google.common.collect.ImmutableList;
  21 import java.net.URI;
  22 import java.time.Clock;
  23 import java.time.LocalDateTime;
  24 import java.time.format.DateTimeFormatter;
  25 import java.util.List;
  26 import java.util.Map.Entry;
  27 import java.util.Optional;
  28 import java.util.concurrent.ExecutionException;
  29 import javax.ws.rs.Path;
  30 import javax.ws.rs.WebApplicationException;
  31 import javax.ws.rs.core.Response;
  32 import javax.ws.rs.core.UriInfo;
  33 import org.eclipse.jdt.annotation.Nullable;
  34 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  35 import org.opendaylight.mdsal.dom.api.DOMActionResult;
  36 import org.opendaylight.mdsal.dom.api.DOMMountPoint;
  37 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
  38 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
  39 import org.opendaylight.restconf.common.context.NormalizedNodeContext;
  40 import org.opendaylight.restconf.common.context.WriterParameters;
  41 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
  42 import org.opendaylight.restconf.common.errors.RestconfError;
  43 import org.opendaylight.restconf.common.errors.RestconfError.ErrorTag;
  44 import org.opendaylight.restconf.common.errors.RestconfError.ErrorType;
  45 import org.opendaylight.restconf.common.patch.PatchContext;
  46 import org.opendaylight.restconf.common.patch.PatchStatusContext;
  47 import org.opendaylight.restconf.nb.rfc8040.Rfc8040;
  48 import org.opendaylight.restconf.nb.rfc8040.handlers.ActionServiceHandler;
  49 import org.opendaylight.restconf.nb.rfc8040.handlers.DOMMountPointServiceHandler;
  50 import org.opendaylight.restconf.nb.rfc8040.handlers.SchemaContextHandler;
  51 import org.opendaylight.restconf.nb.rfc8040.handlers.TransactionChainHandler;
  52 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfDataService;
  53 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfStreamsSubscriptionService;
  54 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.MdsalRestconfStrategy;
  55 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.RestconfStrategy;
  56 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.RestconfTransaction;
  57 import org.opendaylight.restconf.nb.rfc8040.rests.utils.DeleteDataTransactionUtil;
  58 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PatchDataTransactionUtil;
  59 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PlainPatchDataTransactionUtil;
  60 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PostDataTransactionUtil;
  61 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PutDataTransactionUtil;
  62 import org.opendaylight.restconf.nb.rfc8040.rests.utils.ReadDataTransactionUtil;
  63 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant;
  64 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.Insert;
  65 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfInvokeOperationsUtil;
  66 import org.opendaylight.restconf.nb.rfc8040.streams.Configuration;
  67 import org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationListenerAdapter;
  68 import org.opendaylight.restconf.nb.rfc8040.utils.mapping.RestconfMappingNodeUtil;
  69 import org.opendaylight.restconf.nb.rfc8040.utils.parser.IdentifierCodec;
  70 import org.opendaylight.restconf.nb.rfc8040.utils.parser.ParserIdentifier;
  71 import org.opendaylight.yang.gen.v1.urn.sal.restconf.event.subscription.rev140708.NotificationOutputTypeGrouping.NotificationOutputType;
  72 import org.opendaylight.yangtools.concepts.Immutable;
  73 import org.opendaylight.yangtools.yang.common.QName;
  74 import org.opendaylight.yangtools.yang.common.Revision;
  75 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  76 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  77 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  78 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  79 import org.opendaylight.yangtools.yang.model.api.ActionDefinition;
  80 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  81 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
  82 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
  83 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
  84 import org.slf4j.Logger;
  85 import org.slf4j.LoggerFactory;
  86
  87 /**
  88  * Implementation of {@link RestconfDataService}.
  89  */
  90 @Path("/")
  91 public class RestconfDataServiceImpl implements RestconfDataService {
  92     // FIXME: we should be able to interpret 'point' and refactor this class into a behavior
  93     private static final class QueryParams implements Immutable {
  94         final @Nullable String point;
  95         final @Nullable Insert insert;
  96
  97         QueryParams(final @Nullable Insert insert, final @Nullable String point) {
  98             this.insert = insert;
  99             this.point = point;
 100         }
 101     }
 102
 103     private static final Logger LOG = LoggerFactory.getLogger(RestconfDataServiceImpl.class);
 104     private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MMM-dd HH:mm:ss");
 105
 106     private final RestconfStreamsSubscriptionService delegRestconfSubscrService;
 107     private final SubscribeToStreamUtil streamUtils;
 108
 109     // FIXME: evaluate thread-safety of updates (synchronized) vs. access (mostly unsynchronized) here
 110     private SchemaContextHandler schemaContextHandler;
 111     private TransactionChainHandler transactionChainHandler;
 112     private DOMMountPointServiceHandler mountPointServiceHandler;
 113     private volatile ActionServiceHandler actionServiceHandler;
 114
 115     public RestconfDataServiceImpl(final SchemaContextHandler schemaContextHandler,
 116             final TransactionChainHandler transactionChainHandler,
 117             final DOMMountPointServiceHandler mountPointServiceHandler,
 118             final RestconfStreamsSubscriptionService delegRestconfSubscrService,
 119             final ActionServiceHandler actionServiceHandler,
 120             final Configuration configuration) {
 121         this.actionServiceHandler = requireNonNull(actionServiceHandler);
 122         this.schemaContextHandler = requireNonNull(schemaContextHandler);
 123         this.transactionChainHandler = requireNonNull(transactionChainHandler);
 124         this.mountPointServiceHandler = requireNonNull(mountPointServiceHandler);
 125         this.delegRestconfSubscrService = requireNonNull(delegRestconfSubscrService);
 126         streamUtils = configuration.isUseSSE() ? SubscribeToStreamUtil.serverSentEvents()
 127                 : SubscribeToStreamUtil.webSockets();
 128     }
 129
 130     @Override
 131     public synchronized void updateHandlers(final Object... handlers) {
 132         for (final Object object : handlers) {
 133             if (object instanceof SchemaContextHandler) {
 134                 schemaContextHandler = (SchemaContextHandler) object;
 135             } else if (object instanceof ActionServiceHandler) {
 136                 actionServiceHandler = (ActionServiceHandler) object;
 137             } else if (object instanceof DOMMountPointServiceHandler) {
 138                 mountPointServiceHandler = (DOMMountPointServiceHandler) object;
 139             } else if (object instanceof TransactionChainHandler) {
 140                 transactionChainHandler = (TransactionChainHandler) object;
 141             }
 142         }
 143     }
 144
 145     @Override
 146     public Response readData(final UriInfo uriInfo) {
 147         return readData(null, uriInfo);
 148     }
 149
 150     @Override
 151     public Response readData(final String identifier, final UriInfo uriInfo) {
 152         final EffectiveModelContext schemaContextRef = this.schemaContextHandler.get();
 153         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
 154                 identifier, schemaContextRef, Optional.of(this.mountPointServiceHandler.get()));
 155         final WriterParameters parameters = ReadDataTransactionUtil.parseUriParameters(instanceIdentifier, uriInfo);
 156
 157         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
 158         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 159         final NormalizedNode<?, ?> node;
 160         if (parameters.getFieldPaths() != null && !parameters.getFieldPaths().isEmpty()) {
 161             node = ReadDataTransactionUtil.readData(parameters.getContent(), instanceIdentifier.getInstanceIdentifier(),
 162                     strategy, parameters.getWithDefault(), schemaContextRef, parameters.getFieldPaths());
 163         } else {
 164             node = readData(identifier, parameters.getContent(), instanceIdentifier.getInstanceIdentifier(), strategy,
 165                     parameters.getWithDefault(), schemaContextRef, uriInfo);
 166         }
 167         if (identifier != null && identifier.contains(STREAM_PATH) && identifier.contains(STREAM_ACCESS_PATH_PART)
 168                 && identifier.contains(STREAM_LOCATION_PATH_PART)) {
 169             final String value = (String) node.getValue();
 170             final String streamName = value.substring(value.indexOf(NOTIFICATION_STREAM + '/'));
 171             this.delegRestconfSubscrService.subscribeToStream(streamName, uriInfo);
 172         }
 173         if (node == null) {
 174             throw new RestconfDocumentedException(
 175                     "Request could not be completed because the relevant data model content does not exist",
 176                     RestconfError.ErrorType.PROTOCOL,
 177                     RestconfError.ErrorTag.DATA_MISSING);
 178         }
 179
 180         if (parameters.getContent().equals(RestconfDataServiceConstant.ReadData.ALL)
 181                     || parameters.getContent().equals(RestconfDataServiceConstant.ReadData.CONFIG)) {
 182             final QName type = node.getNodeType();
 183             return Response.status(200)
 184                     .entity(new NormalizedNodeContext(instanceIdentifier, node, parameters))
 185                     .header("ETag", '"' + type.getModule().getRevision().map(Revision::toString).orElse(null)
 186                         + "-" + type.getLocalName() + '"')
 187                     .header("Last-Modified", FORMATTER.format(LocalDateTime.now(Clock.systemUTC())))
 188                     .build();
 189         }
 190
 191         return Response.status(200).entity(new NormalizedNodeContext(instanceIdentifier, node, parameters)).build();
 192     }
 193
 194     /**
 195      * Read specific type of data from data store via transaction and if identifier read data from
 196      * streams then put streams from actual schema context to datastore.
 197      *
 198      * @param identifier    identifier of data to read
 199      * @param content       type of data to read (config, state, all)
 200      * @param strategy      {@link RestconfStrategy} - object that perform the actual DS operations
 201      * @param withDefa      value of with-defaults parameter
 202      * @param schemaContext schema context
 203      * @param uriInfo       uri info
 204      * @return {@link NormalizedNode}
 205      */
 206     private NormalizedNode<?, ?> readData(final String identifier, final String content,
 207             final YangInstanceIdentifier path, final RestconfStrategy strategy, final String withDefa,
 208             final EffectiveModelContext schemaContext, final UriInfo uriInfo) {
 209         if (identifier != null && identifier.contains(STREAMS_PATH) && !identifier.contains(STREAM_PATH_PART)) {
 210             createAllYangNotificationStreams(strategy, schemaContext, uriInfo);
 211         }
 212         return ReadDataTransactionUtil.readData(content, path, strategy, withDefa, schemaContext);
 213     }
 214
 215     private void createAllYangNotificationStreams(final RestconfStrategy strategy,
 216             final EffectiveModelContext schemaContext, final UriInfo uriInfo) {
 217         final RestconfTransaction transaction = strategy.prepareWriteExecution();
 218
 219         for (final NotificationDefinition notificationDefinition : schemaContext.getNotifications()) {
 220             final NotificationListenerAdapter notifiStreamXML =
 221                 CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
 222                     NotificationOutputType.XML);
 223             final NotificationListenerAdapter notifiStreamJSON =
 224                 CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
 225                     NotificationOutputType.JSON);
 226             writeNotificationStreamToDatastore(schemaContext, uriInfo, transaction, notifiStreamXML);
 227             writeNotificationStreamToDatastore(schemaContext, uriInfo, transaction, notifiStreamJSON);
 228         }
 229         try {
 230             transaction.commit().get();
 231         } catch (final InterruptedException | ExecutionException e) {
 232             throw new RestconfDocumentedException("Problem while putting data to DS.", e);
 233         }
 234     }
 235
 236     private void writeNotificationStreamToDatastore(final EffectiveModelContext schemaContext,
 237             final UriInfo uriInfo, final RestconfTransaction transaction, final NotificationListenerAdapter listener) {
 238         final URI uri = streamUtils.prepareUriByStreamName(uriInfo, listener.getStreamName());
 239         final MapEntryNode mapToStreams = RestconfMappingNodeUtil.mapYangNotificationStreamByIetfRestconfMonitoring(
 240                 listener.getSchemaPath().lastNodeIdentifier(), schemaContext.getNotifications(), null,
 241                 listener.getOutputType(), uri, SubscribeToStreamUtil.getMonitoringModule(schemaContext));
 242
 243         final String name = listener.getSchemaPath().lastNodeIdentifier().getLocalName();
 244         transaction.merge(LogicalDatastoreType.OPERATIONAL,
 245             IdentifierCodec.deserialize(Rfc8040.MonitoringModule.PATH_TO_STREAM_WITHOUT_KEY + name, schemaContext),
 246             mapToStreams);
 247     }
 248
 249     @Override
 250     public Response putData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 251         requireNonNull(payload);
 252
 253         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 254
 255         final InstanceIdentifierContext<? extends SchemaNode> iid = payload.getInstanceIdentifierContext();
 256
 257         PutDataTransactionUtil.validInputData(iid.getSchemaNode(), payload);
 258         PutDataTransactionUtil.validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
 259         PutDataTransactionUtil.validateListKeysEqualityInPayloadAndUri(payload);
 260
 261         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 262         final EffectiveModelContext ref = mountPoint == null
 263                 ? this.schemaContextHandler.get() : modelContext(mountPoint);
 264
 265         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 266         return PutDataTransactionUtil.putData(payload, ref, strategy, checkedParms.insert, checkedParms.point);
 267     }
 268
 269     private static QueryParams checkQueryParameters(final UriInfo uriInfo) {
 270         boolean insertUsed = false;
 271         boolean pointUsed = false;
 272         Insert insert = null;
 273         String point = null;
 274
 275         for (final Entry<String, List<String>> entry : uriInfo.getQueryParameters().entrySet()) {
 276             switch (entry.getKey()) {
 277                 case INSERT:
 278                     if (insertUsed) {
 279                         throw new RestconfDocumentedException("Insert parameter can be used only once.",
 280                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 281                     }
 282
 283                     insertUsed = true;
 284                     final String str = entry.getValue().get(0);
 285                     insert = Insert.forValue(str);
 286                     if (insert == null) {
 287                         throw new RestconfDocumentedException("Unrecognized insert parameter value '" + str + "'",
 288                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 289                     }
 290                     break;
 291                 case POINT:
 292                     if (pointUsed) {
 293                         throw new RestconfDocumentedException("Point parameter can be used only once.",
 294                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 295                     }
 296
 297                     pointUsed = true;
 298                     point = entry.getValue().get(0);
 299                     break;
 300                 default:
 301                     throw new RestconfDocumentedException("Bad parameter for post: " + entry.getKey(),
 302                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 303             }
 304         }
 305
 306         checkQueryParams(insertUsed, pointUsed, insert);
 307         return new QueryParams(insert, point);
 308     }
 309
 310     private static void checkQueryParams(final boolean insertUsed, final boolean pointUsed, final Insert insert) {
 311         if (pointUsed) {
 312             if (!insertUsed) {
 313                 throw new RestconfDocumentedException("Point parameter can't be used without Insert parameter.",
 314                     RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 315             }
 316
 317             if (insert != Insert.BEFORE && insert != Insert.AFTER) {
 318                 throw new RestconfDocumentedException(
 319                     "Point parameter can be used only with 'after' or 'before' values of Insert parameter.",
 320                     RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 321             }
 322         }
 323     }
 324
 325     @Override
 326     public Response postData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 327         return postData(payload, uriInfo);
 328     }
 329
 330     @Override
 331     public Response postData(final NormalizedNodeContext payload, final UriInfo uriInfo) {
 332         requireNonNull(payload);
 333         if (payload.getInstanceIdentifierContext().getSchemaNode() instanceof ActionDefinition) {
 334             return invokeAction(payload);
 335         }
 336
 337         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 338         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 339         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 340         return PostDataTransactionUtil.postData(uriInfo, payload, strategy,
 341                 getSchemaContext(mountPoint), checkedParms.insert, checkedParms.point);
 342     }
 343
 344     @Override
 345     public Response deleteData(final String identifier) {
 346         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
 347                 identifier, this.schemaContextHandler.get(), Optional.of(this.mountPointServiceHandler.get()));
 348
 349         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
 350         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 351         return DeleteDataTransactionUtil.deleteData(strategy, instanceIdentifier.getInstanceIdentifier());
 352     }
 353
 354     @Override
 355     public PatchStatusContext patchData(final String identifier, final PatchContext context, final UriInfo uriInfo) {
 356         return patchData(context, uriInfo);
 357     }
 358
 359     @Override
 360     public PatchStatusContext patchData(final PatchContext context, final UriInfo uriInfo) {
 361         final DOMMountPoint mountPoint = requireNonNull(context).getInstanceIdentifierContext().getMountPoint();
 362         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 363         return PatchDataTransactionUtil.patchData(context, strategy, getSchemaContext(mountPoint));
 364     }
 365
 366     @Override
 367     public Response patchData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 368         requireNonNull(payload);
 369
 370         final InstanceIdentifierContext<? extends SchemaNode> iid = payload
 371                 .getInstanceIdentifierContext();
 372
 373         PutDataTransactionUtil.validInputData(iid.getSchemaNode(), payload);
 374         PutDataTransactionUtil.validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
 375         PutDataTransactionUtil.validateListKeysEqualityInPayloadAndUri(payload);
 376
 377         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 378         final EffectiveModelContext ref = mountPoint == null
 379                 ? this.schemaContextHandler.get() : modelContext(mountPoint);
 380         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 381
 382         return PlainPatchDataTransactionUtil.patchData(payload, strategy, ref);
 383     }
 384
 385     private EffectiveModelContext getSchemaContext(final DOMMountPoint mountPoint) {
 386         return mountPoint == null ? schemaContextHandler.get() : modelContext(mountPoint);
 387     }
 388
 389     // FIXME: why is this synchronized?
 390     public synchronized RestconfStrategy getRestconfStrategy(final DOMMountPoint mountPoint) {
 391         if (mountPoint == null) {
 392             return new MdsalRestconfStrategy(transactionChainHandler);
 393         }
 394
 395         return RestconfStrategy.forMountPoint(mountPoint).orElseThrow(() -> {
 396             LOG.warn("Mount point {} does not expose a suitable access interface", mountPoint.getIdentifier());
 397             return new RestconfDocumentedException("Could not find a supported access interface in mount point "
 398                 + mountPoint.getIdentifier());
 399         });
 400     }
 401
 402     /**
 403      * Invoke Action operation.
 404      *
 405      * @param payload {@link NormalizedNodeContext} - the body of the operation
 406      * @return {@link NormalizedNodeContext} wrapped in {@link Response}
 407      */
 408     public Response invokeAction(final NormalizedNodeContext payload) {
 409         final InstanceIdentifierContext<?> context = payload.getInstanceIdentifierContext();
 410         final DOMMountPoint mountPoint = context.getMountPoint();
 411         final Absolute schemaPath = Absolute.of(ImmutableList.copyOf(context.getSchemaNode().getPath()
 412             .getPathFromRoot()));
 413         final YangInstanceIdentifier yangIIdContext = context.getInstanceIdentifier();
 414         final NormalizedNode<?, ?> data = payload.getData();
 415
 416         if (yangIIdContext.isEmpty() && !RestconfDataServiceConstant.NETCONF_BASE_QNAME.equals(data.getNodeType())) {
 417             throw new RestconfDocumentedException("Instance identifier need to contain at least one path argument",
 418                 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
 419         }
 420
 421         final DOMActionResult response;
 422         final EffectiveModelContext schemaContextRef;
 423         if (mountPoint != null) {
 424             response = RestconfInvokeOperationsUtil.invokeActionViaMountPoint(mountPoint, (ContainerNode) data,
 425                 schemaPath, yangIIdContext);
 426             schemaContextRef = modelContext(mountPoint);
 427         } else {
 428             response = RestconfInvokeOperationsUtil.invokeAction((ContainerNode) data, schemaPath,
 429                 this.actionServiceHandler, yangIIdContext);
 430             schemaContextRef = this.schemaContextHandler.get();
 431         }
 432         final DOMActionResult result = RestconfInvokeOperationsUtil.checkActionResponse(response);
 433
 434         ActionDefinition resultNodeSchema = null;
 435         ContainerNode resultData = null;
 436         if (result != null) {
 437             final Optional<ContainerNode> optOutput = result.getOutput();
 438             if (optOutput.isPresent()) {
 439                 resultData = optOutput.get();
 440                 resultNodeSchema = (ActionDefinition) context.getSchemaNode();
 441             }
 442         }
 443
 444         if (resultData != null && resultData.getValue().isEmpty()) {
 445             throw new WebApplicationException(Response.Status.NO_CONTENT);
 446         }
 447
 448         return Response.status(200).entity(new NormalizedNodeContext(new InstanceIdentifierContext<>(yangIIdContext,
 449                 resultNodeSchema, mountPoint, schemaContextRef), resultData)).build();
 450     }
 451
 452     private static EffectiveModelContext modelContext(final DOMMountPoint mountPoint) {
 453         return mountPoint.getService(DOMSchemaService.class)
 454             .flatMap(svc -> Optional.ofNullable(svc.getGlobalContext()))
 455             .orElse(null);
 456     }
 457 }