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.utils.DeleteDataTransactionUtil;
  57 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PatchDataTransactionUtil;
  58 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PlainPatchDataTransactionUtil;
  59 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PostDataTransactionUtil;
  60 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PutDataTransactionUtil;
  61 import org.opendaylight.restconf.nb.rfc8040.rests.utils.ReadDataTransactionUtil;
  62 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant;
  63 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.Insert;
  64 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfInvokeOperationsUtil;
  65 import org.opendaylight.restconf.nb.rfc8040.streams.Configuration;
  66 import org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationListenerAdapter;
  67 import org.opendaylight.restconf.nb.rfc8040.utils.mapping.RestconfMappingNodeUtil;
  68 import org.opendaylight.restconf.nb.rfc8040.utils.parser.IdentifierCodec;
  69 import org.opendaylight.restconf.nb.rfc8040.utils.parser.ParserIdentifier;
  70 import org.opendaylight.yang.gen.v1.urn.sal.restconf.event.subscription.rev140708.NotificationOutputTypeGrouping.NotificationOutputType;
  71 import org.opendaylight.yangtools.concepts.Immutable;
  72 import org.opendaylight.yangtools.yang.common.QName;
  73 import org.opendaylight.yangtools.yang.common.Revision;
  74 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  75 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  76 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  77 import org.opendaylight.yangtools.yang.model.api.ActionDefinition;
  78 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  79 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
  80 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
  81 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
  82 import org.slf4j.Logger;
  83 import org.slf4j.LoggerFactory;
  84
  85 /**
  86  * Implementation of {@link RestconfDataService}.
  87  */
  88 @Path("/")
  89 public class RestconfDataServiceImpl implements RestconfDataService {
  90     // FIXME: we should be able to interpret 'point' and refactor this class into a behavior
  91     private static final class QueryParams implements Immutable {
  92         final @Nullable String point;
  93         final @Nullable Insert insert;
  94
  95         QueryParams(final @Nullable Insert insert, final @Nullable String point) {
  96             this.insert = insert;
  97             this.point = point;
  98         }
  99     }
 100
 101     private static final Logger LOG = LoggerFactory.getLogger(RestconfDataServiceImpl.class);
 102     private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MMM-dd HH:mm:ss");
 103
 104     private final RestconfStreamsSubscriptionService delegRestconfSubscrService;
 105     private final SubscribeToStreamUtil streamUtils;
 106
 107     // FIXME: evaluate thread-safety of updates (synchronized) vs. access (mostly unsynchronized) here
 108     private SchemaContextHandler schemaContextHandler;
 109     private TransactionChainHandler transactionChainHandler;
 110     private DOMMountPointServiceHandler mountPointServiceHandler;
 111     private volatile ActionServiceHandler actionServiceHandler;
 112
 113     public RestconfDataServiceImpl(final SchemaContextHandler schemaContextHandler,
 114             final TransactionChainHandler transactionChainHandler,
 115             final DOMMountPointServiceHandler mountPointServiceHandler,
 116             final RestconfStreamsSubscriptionService delegRestconfSubscrService,
 117             final ActionServiceHandler actionServiceHandler,
 118             final Configuration configuration) {
 119         this.actionServiceHandler = requireNonNull(actionServiceHandler);
 120         this.schemaContextHandler = requireNonNull(schemaContextHandler);
 121         this.transactionChainHandler = requireNonNull(transactionChainHandler);
 122         this.mountPointServiceHandler = requireNonNull(mountPointServiceHandler);
 123         this.delegRestconfSubscrService = requireNonNull(delegRestconfSubscrService);
 124         streamUtils = configuration.isUseSSE() ? SubscribeToStreamUtil.serverSentEvents()
 125                 : SubscribeToStreamUtil.webSockets();
 126     }
 127
 128     @Override
 129     public synchronized void updateHandlers(final Object... handlers) {
 130         for (final Object object : handlers) {
 131             if (object instanceof SchemaContextHandler) {
 132                 schemaContextHandler = (SchemaContextHandler) object;
 133             } else if (object instanceof ActionServiceHandler) {
 134                 actionServiceHandler = (ActionServiceHandler) object;
 135             } else if (object instanceof DOMMountPointServiceHandler) {
 136                 mountPointServiceHandler = (DOMMountPointServiceHandler) object;
 137             } else if (object instanceof TransactionChainHandler) {
 138                 transactionChainHandler = (TransactionChainHandler) object;
 139             }
 140         }
 141     }
 142
 143     @Override
 144     public Response readData(final UriInfo uriInfo) {
 145         return readData(null, uriInfo);
 146     }
 147
 148     @Override
 149     public Response readData(final String identifier, final UriInfo uriInfo) {
 150         final EffectiveModelContext schemaContextRef = this.schemaContextHandler.get();
 151         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
 152                 identifier, schemaContextRef, Optional.of(this.mountPointServiceHandler.get()));
 153         final WriterParameters parameters = ReadDataTransactionUtil.parseUriParameters(instanceIdentifier, uriInfo);
 154
 155         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
 156         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 157         final NormalizedNode<?, ?> node = readData(identifier, parameters.getContent(),
 158                 instanceIdentifier.getInstanceIdentifier(), strategy, parameters.getWithDefault(), schemaContextRef,
 159                 uriInfo);
 160         if (identifier != null && identifier.contains(STREAM_PATH) && identifier.contains(STREAM_ACCESS_PATH_PART)
 161                 && identifier.contains(STREAM_LOCATION_PATH_PART)) {
 162             final String value = (String) node.getValue();
 163             final String streamName = value.substring(value.indexOf(NOTIFICATION_STREAM + '/'));
 164             this.delegRestconfSubscrService.subscribeToStream(streamName, uriInfo);
 165         }
 166         if (node == null) {
 167             throw new RestconfDocumentedException(
 168                     "Request could not be completed because the relevant data model content does not exist",
 169                     RestconfError.ErrorType.PROTOCOL,
 170                     RestconfError.ErrorTag.DATA_MISSING);
 171         }
 172
 173         if (parameters.getContent().equals(RestconfDataServiceConstant.ReadData.ALL)
 174                     || parameters.getContent().equals(RestconfDataServiceConstant.ReadData.CONFIG)) {
 175             final QName type = node.getNodeType();
 176             return Response.status(200)
 177                     .entity(new NormalizedNodeContext(instanceIdentifier, node, parameters))
 178                     .header("ETag", '"' + type.getModule().getRevision().map(Revision::toString).orElse(null)
 179                         + "-" + type.getLocalName() + '"')
 180                     .header("Last-Modified", FORMATTER.format(LocalDateTime.now(Clock.systemUTC())))
 181                     .build();
 182         }
 183
 184         return Response.status(200).entity(new NormalizedNodeContext(instanceIdentifier, node, parameters)).build();
 185     }
 186
 187     /**
 188      * Read specific type of data from data store via transaction and if identifier read data from
 189      * streams then put streams from actual schema context to datastore.
 190      *
 191      * @param identifier    identifier of data to read
 192      * @param content       type of data to read (config, state, all)
 193      * @param strategy      {@link RestconfStrategy} - object that perform the actual DS operations
 194      * @param withDefa      value of with-defaults parameter
 195      * @param schemaContext schema context
 196      * @param uriInfo       uri info
 197      * @return {@link NormalizedNode}
 198      */
 199     private NormalizedNode<?, ?> readData(final String identifier, final String content,
 200             final YangInstanceIdentifier path, final RestconfStrategy strategy, final String withDefa,
 201             final EffectiveModelContext schemaContext, final UriInfo uriInfo) {
 202         if (identifier != null && identifier.contains(STREAMS_PATH) && !identifier.contains(STREAM_PATH_PART)) {
 203             createAllYangNotificationStreams(strategy, schemaContext, uriInfo);
 204         }
 205         return ReadDataTransactionUtil.readData(content, path, strategy, withDefa, schemaContext);
 206     }
 207
 208     private void createAllYangNotificationStreams(final RestconfStrategy strategy,
 209             final EffectiveModelContext schemaContext, final UriInfo uriInfo) {
 210         strategy.prepareReadWriteExecution();
 211         final boolean exist = checkExist(schemaContext, strategy);
 212
 213         for (final NotificationDefinition notificationDefinition : schemaContext.getNotifications()) {
 214             final NotificationListenerAdapter notifiStreamXML =
 215                 CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
 216                     NotificationOutputType.XML);
 217             final NotificationListenerAdapter notifiStreamJSON =
 218                 CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
 219                     NotificationOutputType.JSON);
 220             writeNotificationStreamToDatastore(schemaContext, uriInfo, strategy, exist, notifiStreamXML);
 221             writeNotificationStreamToDatastore(schemaContext, uriInfo, strategy, exist, notifiStreamJSON);
 222         }
 223         try {
 224             strategy.commit().get();
 225         } catch (final InterruptedException | ExecutionException e) {
 226             throw new RestconfDocumentedException("Problem while putting data to DS.", e);
 227         }
 228     }
 229
 230     private void writeNotificationStreamToDatastore(final EffectiveModelContext schemaContext,
 231             final UriInfo uriInfo, final RestconfStrategy strategy, final boolean exist,
 232             final NotificationListenerAdapter listener) {
 233         final URI uri = streamUtils.prepareUriByStreamName(uriInfo, listener.getStreamName());
 234         final NormalizedNode<?, ?> mapToStreams =
 235             RestconfMappingNodeUtil.mapYangNotificationStreamByIetfRestconfMonitoring(
 236                 listener.getSchemaPath().lastNodeIdentifier(), schemaContext.getNotifications(), null,
 237                 listener.getOutputType(), uri, SubscribeToStreamUtil.getMonitoringModule(schemaContext), exist);
 238         writeDataToDS(schemaContext,
 239             listener.getSchemaPath().lastNodeIdentifier().getLocalName(), strategy, exist, mapToStreams);
 240     }
 241
 242     private static boolean checkExist(final EffectiveModelContext schemaContext, final RestconfStrategy strategy) {
 243         try {
 244             return strategy.exists(LogicalDatastoreType.OPERATIONAL,
 245                 IdentifierCodec.deserialize(Rfc8040.MonitoringModule.PATH_TO_STREAMS, schemaContext)).get();
 246         } catch (final InterruptedException | ExecutionException exception) {
 247             throw new RestconfDocumentedException("Problem while checking data if exists", exception);
 248         }
 249     }
 250
 251     private static void writeDataToDS(final EffectiveModelContext schemaContext, final String name,
 252                                       final RestconfStrategy strategy, final boolean exist,
 253                                       final NormalizedNode<?, ?> mapToStreams) {
 254         final String pathId;
 255         if (exist) {
 256             pathId = Rfc8040.MonitoringModule.PATH_TO_STREAM_WITHOUT_KEY + name;
 257         } else {
 258             pathId = Rfc8040.MonitoringModule.PATH_TO_STREAMS;
 259         }
 260         strategy.merge(LogicalDatastoreType.OPERATIONAL, IdentifierCodec.deserialize(pathId, schemaContext),
 261             mapToStreams);
 262     }
 263
 264     @Override
 265     public Response putData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 266         requireNonNull(payload);
 267
 268         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 269
 270         final InstanceIdentifierContext<? extends SchemaNode> iid = payload.getInstanceIdentifierContext();
 271
 272         PutDataTransactionUtil.validInputData(iid.getSchemaNode(), payload);
 273         PutDataTransactionUtil.validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
 274         PutDataTransactionUtil.validateListKeysEqualityInPayloadAndUri(payload);
 275
 276         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 277         final EffectiveModelContext ref = mountPoint == null
 278                 ? this.schemaContextHandler.get() : modelContext(mountPoint);
 279
 280         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 281         return PutDataTransactionUtil.putData(payload, ref, strategy, checkedParms.insert, checkedParms.point);
 282     }
 283
 284     private static QueryParams checkQueryParameters(final UriInfo uriInfo) {
 285         boolean insertUsed = false;
 286         boolean pointUsed = false;
 287         Insert insert = null;
 288         String point = null;
 289
 290         for (final Entry<String, List<String>> entry : uriInfo.getQueryParameters().entrySet()) {
 291             switch (entry.getKey()) {
 292                 case INSERT:
 293                     if (insertUsed) {
 294                         throw new RestconfDocumentedException("Insert parameter can be used only once.",
 295                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 296                     }
 297
 298                     insertUsed = true;
 299                     final String str = entry.getValue().get(0);
 300                     insert = Insert.forValue(str);
 301                     if (insert == null) {
 302                         throw new RestconfDocumentedException("Unrecognized insert parameter value '" + str + "'",
 303                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 304                     }
 305                     break;
 306                 case POINT:
 307                     if (pointUsed) {
 308                         throw new RestconfDocumentedException("Point parameter can be used only once.",
 309                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 310                     }
 311
 312                     pointUsed = true;
 313                     point = entry.getValue().get(0);
 314                     break;
 315                 default:
 316                     throw new RestconfDocumentedException("Bad parameter for post: " + entry.getKey(),
 317                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 318             }
 319         }
 320
 321         checkQueryParams(insertUsed, pointUsed, insert);
 322         return new QueryParams(insert, point);
 323     }
 324
 325     private static void checkQueryParams(final boolean insertUsed, final boolean pointUsed, final Insert insert) {
 326         if (pointUsed) {
 327             if (!insertUsed) {
 328                 throw new RestconfDocumentedException("Point parameter can't be used without Insert parameter.",
 329                     RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 330             }
 331
 332             if (insert != Insert.BEFORE && insert != Insert.AFTER) {
 333                 throw new RestconfDocumentedException(
 334                     "Point parameter can be used only with 'after' or 'before' values of Insert parameter.",
 335                     RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 336             }
 337         }
 338     }
 339
 340     @Override
 341     public Response postData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 342         return postData(payload, uriInfo);
 343     }
 344
 345     @Override
 346     public Response postData(final NormalizedNodeContext payload, final UriInfo uriInfo) {
 347         requireNonNull(payload);
 348         if (payload.getInstanceIdentifierContext().getSchemaNode() instanceof ActionDefinition) {
 349             return invokeAction(payload);
 350         }
 351
 352         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 353         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 354         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 355         return PostDataTransactionUtil.postData(uriInfo, payload, strategy,
 356                 getSchemaContext(mountPoint), checkedParms.insert, checkedParms.point);
 357     }
 358
 359     @Override
 360     public Response deleteData(final String identifier) {
 361         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
 362                 identifier, this.schemaContextHandler.get(), Optional.of(this.mountPointServiceHandler.get()));
 363
 364         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
 365         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 366         return DeleteDataTransactionUtil.deleteData(strategy, instanceIdentifier.getInstanceIdentifier());
 367     }
 368
 369     @Override
 370     public PatchStatusContext patchData(final String identifier, final PatchContext context, final UriInfo uriInfo) {
 371         return patchData(context, uriInfo);
 372     }
 373
 374     @Override
 375     public PatchStatusContext patchData(final PatchContext context, final UriInfo uriInfo) {
 376         final DOMMountPoint mountPoint = requireNonNull(context).getInstanceIdentifierContext().getMountPoint();
 377         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 378         return PatchDataTransactionUtil.patchData(context, strategy, getSchemaContext(mountPoint));
 379     }
 380
 381     @Override
 382     public Response patchData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 383         requireNonNull(payload);
 384
 385         final InstanceIdentifierContext<? extends SchemaNode> iid = payload
 386                 .getInstanceIdentifierContext();
 387
 388         PutDataTransactionUtil.validInputData(iid.getSchemaNode(), payload);
 389         PutDataTransactionUtil.validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
 390         PutDataTransactionUtil.validateListKeysEqualityInPayloadAndUri(payload);
 391
 392         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 393         final EffectiveModelContext ref = mountPoint == null
 394                 ? this.schemaContextHandler.get() : modelContext(mountPoint);
 395         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 396
 397         return PlainPatchDataTransactionUtil.patchData(payload, strategy, ref);
 398     }
 399
 400     private EffectiveModelContext getSchemaContext(final DOMMountPoint mountPoint) {
 401         return mountPoint == null ? schemaContextHandler.get() : modelContext(mountPoint);
 402     }
 403
 404     // FIXME: why is this synchronized?
 405     public synchronized RestconfStrategy getRestconfStrategy(final DOMMountPoint mountPoint) {
 406         if (mountPoint == null) {
 407             return new MdsalRestconfStrategy(transactionChainHandler);
 408         }
 409
 410         return RestconfStrategy.forMountPoint(mountPoint).orElseThrow(() -> {
 411             LOG.warn("Mount point {} does not expose a suitable access interface", mountPoint.getIdentifier());
 412             return new RestconfDocumentedException("Could not find a supported access interface in mount point "
 413                 + mountPoint.getIdentifier());
 414         });
 415     }
 416
 417     /**
 418      * Invoke Action operation.
 419      *
 420      * @param payload {@link NormalizedNodeContext} - the body of the operation
 421      * @return {@link NormalizedNodeContext} wrapped in {@link Response}
 422      */
 423     public Response invokeAction(final NormalizedNodeContext payload) {
 424         final InstanceIdentifierContext<?> context = payload.getInstanceIdentifierContext();
 425         final DOMMountPoint mountPoint = context.getMountPoint();
 426         final Absolute schemaPath = Absolute.of(ImmutableList.copyOf(context.getSchemaNode().getPath()
 427             .getPathFromRoot()));
 428         final YangInstanceIdentifier yangIIdContext = context.getInstanceIdentifier();
 429         final NormalizedNode<?, ?> data = payload.getData();
 430
 431         if (yangIIdContext.isEmpty() && !RestconfDataServiceConstant.NETCONF_BASE_QNAME.equals(data.getNodeType())) {
 432             throw new RestconfDocumentedException("Instance identifier need to contain at least one path argument",
 433                 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
 434         }
 435
 436         final DOMActionResult response;
 437         final EffectiveModelContext schemaContextRef;
 438         if (mountPoint != null) {
 439             response = RestconfInvokeOperationsUtil.invokeActionViaMountPoint(mountPoint, (ContainerNode) data,
 440                 schemaPath, yangIIdContext);
 441             schemaContextRef = modelContext(mountPoint);
 442         } else {
 443             response = RestconfInvokeOperationsUtil.invokeAction((ContainerNode) data, schemaPath,
 444                 this.actionServiceHandler, yangIIdContext);
 445             schemaContextRef = this.schemaContextHandler.get();
 446         }
 447         final DOMActionResult result = RestconfInvokeOperationsUtil.checkActionResponse(response);
 448
 449         ActionDefinition resultNodeSchema = null;
 450         ContainerNode resultData = null;
 451         if (result != null) {
 452             final Optional<ContainerNode> optOutput = result.getOutput();
 453             if (optOutput.isPresent()) {
 454                 resultData = optOutput.get();
 455                 resultNodeSchema = (ActionDefinition) context.getSchemaNode();
 456             }
 457         }
 458
 459         if (resultData != null && resultData.getValue().isEmpty()) {
 460             throw new WebApplicationException(Response.Status.NO_CONTENT);
 461         }
 462
 463         return Response.status(200).entity(new NormalizedNodeContext(new InstanceIdentifierContext<>(yangIIdContext,
 464                 resultNodeSchema, mountPoint, schemaContextRef), resultData)).build();
 465     }
 466
 467     private static EffectiveModelContext modelContext(final DOMMountPoint mountPoint) {
 468         return mountPoint.getService(DOMSchemaService.class)
 469             .flatMap(svc -> Optional.ofNullable(svc.getGlobalContext()))
 470             .orElse(null);
 471     }
 472 }