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 java.net.URI;
  21 import java.time.Clock;
  22 import java.time.LocalDateTime;
  23 import java.time.format.DateTimeFormatter;
  24 import java.util.List;
  25 import java.util.Map.Entry;
  26 import java.util.Optional;
  27 import java.util.concurrent.ExecutionException;
  28 import javax.ws.rs.Path;
  29 import javax.ws.rs.WebApplicationException;
  30 import javax.ws.rs.core.Response;
  31 import javax.ws.rs.core.UriInfo;
  32 import org.eclipse.jdt.annotation.NonNull;
  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.DOMDataBroker;
  37 import org.opendaylight.mdsal.dom.api.DOMMountPoint;
  38 import org.opendaylight.netconf.dom.api.NetconfDataTreeService;
  39 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
  40 import org.opendaylight.restconf.common.context.NormalizedNodeContext;
  41 import org.opendaylight.restconf.common.context.WriterParameters;
  42 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
  43 import org.opendaylight.restconf.common.errors.RestconfError;
  44 import org.opendaylight.restconf.common.errors.RestconfError.ErrorTag;
  45 import org.opendaylight.restconf.common.errors.RestconfError.ErrorType;
  46 import org.opendaylight.restconf.common.patch.PatchContext;
  47 import org.opendaylight.restconf.common.patch.PatchStatusContext;
  48 import org.opendaylight.restconf.nb.rfc8040.Rfc8040;
  49 import org.opendaylight.restconf.nb.rfc8040.handlers.ActionServiceHandler;
  50 import org.opendaylight.restconf.nb.rfc8040.handlers.DOMMountPointServiceHandler;
  51 import org.opendaylight.restconf.nb.rfc8040.handlers.SchemaContextHandler;
  52 import org.opendaylight.restconf.nb.rfc8040.handlers.TransactionChainHandler;
  53 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfDataService;
  54 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfStreamsSubscriptionService;
  55 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.MdsalRestconfStrategy;
  56 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.NetconfRestconfStrategy;
  57 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.RestconfStrategy;
  58 import org.opendaylight.restconf.nb.rfc8040.rests.utils.DeleteDataTransactionUtil;
  59 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PatchDataTransactionUtil;
  60 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PlainPatchDataTransactionUtil;
  61 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PostDataTransactionUtil;
  62 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PutDataTransactionUtil;
  63 import org.opendaylight.restconf.nb.rfc8040.rests.utils.ReadDataTransactionUtil;
  64 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant;
  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.NormalizedNode;
  78 import org.opendaylight.yangtools.yang.model.api.ActionDefinition;
  79 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  80 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
  81 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
  82 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  83 import org.slf4j.Logger;
  84 import org.slf4j.LoggerFactory;
  85
  86 /**
  87  * Implementation of {@link RestconfDataService}.
  88  */
  89 @Path("/")
  90 public class RestconfDataServiceImpl implements RestconfDataService {
  91     private static final class QueryParams implements Immutable {
  92         final @Nullable String point;
  93         final @Nullable String insert;
  94
  95         QueryParams(final @Nullable String 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(instanceIdentifier, mountPoint);
 157         final NormalizedNode<?, ?> node = readData(identifier, parameters.getContent(),
 158                 strategy, parameters.getWithDefault(), schemaContextRef, uriInfo);
 159         if (identifier != null && identifier.contains(STREAM_PATH) && identifier.contains(STREAM_ACCESS_PATH_PART)
 160                 && identifier.contains(STREAM_LOCATION_PATH_PART)) {
 161             final String value = (String) node.getValue();
 162             final String streamName = value.substring(value.indexOf(NOTIFICATION_STREAM + '/'));
 163             this.delegRestconfSubscrService.subscribeToStream(streamName, uriInfo);
 164         }
 165         if (node == null) {
 166             throw new RestconfDocumentedException(
 167                     "Request could not be completed because the relevant data model content does not exist",
 168                     RestconfError.ErrorType.PROTOCOL,
 169                     RestconfError.ErrorTag.DATA_MISSING);
 170         }
 171
 172         if (parameters.getContent().equals(RestconfDataServiceConstant.ReadData.ALL)
 173                     || parameters.getContent().equals(RestconfDataServiceConstant.ReadData.CONFIG)) {
 174             final QName type = node.getNodeType();
 175             return Response.status(200)
 176                     .entity(new NormalizedNodeContext(instanceIdentifier, node, parameters))
 177                     .header("ETag", '"' + type.getModule().getRevision().map(Revision::toString).orElse(null)
 178                         + "-" + type.getLocalName() + '"')
 179                     .header("Last-Modified", FORMATTER.format(LocalDateTime.now(Clock.systemUTC())))
 180                     .build();
 181         }
 182
 183         return Response.status(200).entity(new NormalizedNodeContext(instanceIdentifier, node, parameters)).build();
 184     }
 185
 186     /**
 187      * Read specific type of data from data store via transaction and if identifier read data from
 188      * streams then put streams from actual schema context to datastore.
 189      *
 190      * @param identifier    identifier of data to read
 191      * @param content       type of data to read (config, state, all)
 192      * @param strategy      {@link RestconfStrategy} - object that perform the actual DS operations
 193      * @param withDefa      value of with-defaults parameter
 194      * @param schemaContext schema context
 195      * @param uriInfo       uri info
 196      * @return {@link NormalizedNode}
 197      */
 198     private NormalizedNode<?, ?> readData(final String identifier, final String content,
 199             final RestconfStrategy strategy, final String withDefa, final EffectiveModelContext schemaContext,
 200             final UriInfo uriInfo) {
 201         if (identifier != null && identifier.contains(STREAMS_PATH) && !identifier.contains(STREAM_PATH_PART)) {
 202             createAllYangNotificationStreams(strategy, schemaContext, uriInfo);
 203         }
 204         return ReadDataTransactionUtil.readData(content, strategy, withDefa, schemaContext);
 205     }
 206
 207     private void createAllYangNotificationStreams(final RestconfStrategy strategy,
 208             final EffectiveModelContext schemaContext, final UriInfo uriInfo) {
 209         strategy.prepareReadWriteExecution();
 210         final boolean exist = checkExist(schemaContext, strategy);
 211
 212         for (final NotificationDefinition notificationDefinition : schemaContext.getNotifications()) {
 213             final NotificationListenerAdapter notifiStreamXML =
 214                 CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
 215                     NotificationOutputType.XML);
 216             final NotificationListenerAdapter notifiStreamJSON =
 217                 CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
 218                     NotificationOutputType.JSON);
 219             writeNotificationStreamToDatastore(schemaContext, uriInfo, strategy, exist, notifiStreamXML);
 220             writeNotificationStreamToDatastore(schemaContext, uriInfo, strategy, exist, notifiStreamJSON);
 221         }
 222         try {
 223             strategy.commit().get();
 224         } catch (final InterruptedException | ExecutionException e) {
 225             throw new RestconfDocumentedException("Problem while putting data to DS.", e);
 226         }
 227     }
 228
 229     private void writeNotificationStreamToDatastore(final EffectiveModelContext schemaContext,
 230             final UriInfo uriInfo, final RestconfStrategy strategy, final boolean exist,
 231             final NotificationListenerAdapter listener) {
 232         final URI uri = streamUtils.prepareUriByStreamName(uriInfo, listener.getStreamName());
 233         final NormalizedNode<?, ?> mapToStreams =
 234             RestconfMappingNodeUtil.mapYangNotificationStreamByIetfRestconfMonitoring(
 235                 listener.getSchemaPath().getLastComponent(), schemaContext.getNotifications(), null,
 236                 listener.getOutputType(), uri, SubscribeToStreamUtil.getMonitoringModule(schemaContext), exist);
 237         writeDataToDS(schemaContext,
 238             listener.getSchemaPath().getLastComponent().getLocalName(), strategy, exist, mapToStreams);
 239     }
 240
 241     private static boolean checkExist(final EffectiveModelContext schemaContext, final RestconfStrategy strategy) {
 242         try {
 243             return strategy.exists(LogicalDatastoreType.OPERATIONAL,
 244                 IdentifierCodec.deserialize(Rfc8040.MonitoringModule.PATH_TO_STREAMS, schemaContext)).get();
 245         } catch (final InterruptedException | ExecutionException exception) {
 246             throw new RestconfDocumentedException("Problem while checking data if exists", exception);
 247         }
 248     }
 249
 250     private static void writeDataToDS(final EffectiveModelContext schemaContext, final String name,
 251                                       final RestconfStrategy strategy, final boolean exist,
 252                                       final NormalizedNode<?, ?> mapToStreams) {
 253         final String pathId;
 254         if (exist) {
 255             pathId = Rfc8040.MonitoringModule.PATH_TO_STREAM_WITHOUT_KEY + name;
 256         } else {
 257             pathId = Rfc8040.MonitoringModule.PATH_TO_STREAMS;
 258         }
 259         strategy.merge(LogicalDatastoreType.OPERATIONAL, IdentifierCodec.deserialize(pathId, schemaContext),
 260             mapToStreams);
 261     }
 262
 263     @Override
 264     public Response putData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 265         requireNonNull(payload);
 266
 267         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 268
 269         final InstanceIdentifierContext<? extends SchemaNode> iid = payload.getInstanceIdentifierContext();
 270
 271         PutDataTransactionUtil.validInputData(iid.getSchemaNode(), payload);
 272         PutDataTransactionUtil.validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
 273         PutDataTransactionUtil.validateListKeysEqualityInPayloadAndUri(payload);
 274
 275         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 276         final EffectiveModelContext ref = mountPoint == null
 277                 ? this.schemaContextHandler.get()
 278                 : mountPoint.getEffectiveModelContext();
 279
 280         final RestconfStrategy strategy = getRestconfStrategy(payload.getInstanceIdentifierContext(), 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         String 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                         insertUsed = true;
 295                         insert = entry.getValue().get(0);
 296                     } else {
 297                         throw new RestconfDocumentedException("Insert parameter can be used only once.",
 298                                 RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 299                     }
 300                     break;
 301                 case POINT:
 302                     if (!pointUsed) {
 303                         pointUsed = true;
 304                         point = entry.getValue().get(0);
 305                     } else {
 306                         throw new RestconfDocumentedException("Point parameter can be used only once.",
 307                                 RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 308                     }
 309                     break;
 310                 default:
 311                     throw new RestconfDocumentedException("Bad parameter for post: " + entry.getKey(),
 312                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 313             }
 314         }
 315
 316         checkQueryParams(insertUsed, pointUsed, insert);
 317         return new QueryParams(insert, point);
 318     }
 319
 320     private static void checkQueryParams(final boolean insertUsed, final boolean pointUsed, final String insert) {
 321         if (pointUsed && !insertUsed) {
 322             throw new RestconfDocumentedException("Point parameter can't be used without Insert parameter.",
 323                     RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 324         }
 325         if (pointUsed && (insert.equals("first") || insert.equals("last"))) {
 326             throw new RestconfDocumentedException(
 327                     "Point parameter can be used only with 'after' or 'before' values of Insert parameter.",
 328                     RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 329         }
 330     }
 331
 332     @Override
 333     public Response postData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 334         return postData(payload, uriInfo);
 335     }
 336
 337     @Override
 338     public Response postData(final NormalizedNodeContext payload, final UriInfo uriInfo) {
 339         requireNonNull(payload);
 340         if (payload.getInstanceIdentifierContext().getSchemaNode() instanceof ActionDefinition) {
 341             return invokeAction(payload);
 342         }
 343
 344         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 345         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 346         final RestconfStrategy strategy = getRestconfStrategy(payload.getInstanceIdentifierContext(),
 347                 payload.getInstanceIdentifierContext().getMountPoint());
 348         return PostDataTransactionUtil.postData(uriInfo, payload, strategy,
 349                 getSchemaContext(mountPoint), checkedParms.insert, checkedParms.point);
 350     }
 351
 352     @Override
 353     public Response deleteData(final String identifier) {
 354         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
 355                 identifier, this.schemaContextHandler.get(), Optional.of(this.mountPointServiceHandler.get()));
 356
 357         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
 358         final RestconfStrategy strategy = getRestconfStrategy(instanceIdentifier, mountPoint);
 359         return DeleteDataTransactionUtil.deleteData(strategy);
 360     }
 361
 362     @Override
 363     public PatchStatusContext patchData(final String identifier, final PatchContext context, final UriInfo uriInfo) {
 364         return patchData(context, uriInfo);
 365     }
 366
 367     @Override
 368     public PatchStatusContext patchData(final PatchContext context, final UriInfo uriInfo) {
 369         final DOMMountPoint mountPoint = requireNonNull(context).getInstanceIdentifierContext().getMountPoint();
 370         final RestconfStrategy strategy = getRestconfStrategy(context.getInstanceIdentifierContext(), mountPoint);
 371         return PatchDataTransactionUtil.patchData(context, strategy, getSchemaContext(mountPoint));
 372     }
 373
 374     @Override
 375     public Response patchData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 376         requireNonNull(payload);
 377
 378         final InstanceIdentifierContext<? extends SchemaNode> iid = payload
 379                 .getInstanceIdentifierContext();
 380
 381         PutDataTransactionUtil.validInputData(iid.getSchemaNode(), payload);
 382         PutDataTransactionUtil.validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
 383         PutDataTransactionUtil.validateListKeysEqualityInPayloadAndUri(payload);
 384
 385         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 386         final EffectiveModelContext ref = mountPoint == null
 387                 ? this.schemaContextHandler.get()
 388                 : mountPoint.getEffectiveModelContext();
 389         final RestconfStrategy strategy = getRestconfStrategy(payload.getInstanceIdentifierContext(), mountPoint);
 390
 391         return PlainPatchDataTransactionUtil.patchData(payload, strategy, ref);
 392     }
 393
 394     private EffectiveModelContext getSchemaContext(final DOMMountPoint mountPoint) {
 395         return mountPoint == null ? schemaContextHandler.get() : mountPoint.getEffectiveModelContext();
 396     }
 397
 398     public synchronized RestconfStrategy getRestconfStrategy(final InstanceIdentifierContext<?> instanceIdentifier,
 399                                                 final DOMMountPoint mountPoint) {
 400         if (mountPoint != null) {
 401             final Optional<NetconfDataTreeService> service = mountPoint.getService(NetconfDataTreeService.class);
 402             if (service.isPresent()) {
 403                 return new NetconfRestconfStrategy(service.get(), instanceIdentifier);
 404             }
 405         }
 406         final TransactionChainHandler transactionChain = mountPoint == null
 407                 ? transactionChainHandler : transactionChainOfMountPoint(mountPoint);
 408         return new MdsalRestconfStrategy(instanceIdentifier, transactionChain);
 409     }
 410
 411     /**
 412      * Prepare transaction chain to access data of mount point.
 413      *
 414      * @param mountPoint mount point reference
 415      * @return {@link TransactionChainHandler}
 416      */
 417     private static TransactionChainHandler transactionChainOfMountPoint(final @NonNull DOMMountPoint mountPoint) {
 418         final Optional<DOMDataBroker> domDataBrokerService = mountPoint.getService(DOMDataBroker.class);
 419         if (domDataBrokerService.isPresent()) {
 420             return new TransactionChainHandler(domDataBrokerService.get());
 421         }
 422
 423         final String errMsg = "DOM data broker service isn't available for mount point " + mountPoint.getIdentifier();
 424         LOG.warn(errMsg);
 425         throw new RestconfDocumentedException(errMsg);
 426     }
 427
 428     /**
 429      * Invoke Action operation.
 430      *
 431      * @param payload {@link NormalizedNodeContext} - the body of the operation
 432      * @return {@link NormalizedNodeContext} wrapped in {@link Response}
 433      */
 434     public Response invokeAction(final NormalizedNodeContext payload) {
 435         final InstanceIdentifierContext<?> context = payload.getInstanceIdentifierContext();
 436         final DOMMountPoint mountPoint = context.getMountPoint();
 437         final SchemaPath schemaPath = context.getSchemaNode().getPath();
 438         final YangInstanceIdentifier yangIIdContext = context.getInstanceIdentifier();
 439         final NormalizedNode<?, ?> data = payload.getData();
 440
 441         if (yangIIdContext.isEmpty() && !RestconfDataServiceConstant.NETCONF_BASE_QNAME.equals(data.getNodeType())) {
 442             throw new RestconfDocumentedException("Instance identifier need to contain at least one path argument",
 443                 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
 444         }
 445
 446         final DOMActionResult response;
 447         final EffectiveModelContext schemaContextRef;
 448         if (mountPoint != null) {
 449             response = RestconfInvokeOperationsUtil.invokeActionViaMountPoint(mountPoint, (ContainerNode) data,
 450                 schemaPath, yangIIdContext);
 451             schemaContextRef = mountPoint.getEffectiveModelContext();
 452         } else {
 453             response = RestconfInvokeOperationsUtil.invokeAction((ContainerNode) data, schemaPath,
 454                 this.actionServiceHandler, yangIIdContext);
 455             schemaContextRef = this.schemaContextHandler.get();
 456         }
 457         final DOMActionResult result = RestconfInvokeOperationsUtil.checkActionResponse(response);
 458
 459         ActionDefinition resultNodeSchema = null;
 460         ContainerNode resultData = null;
 461         if (result != null) {
 462             final Optional<ContainerNode> optOutput = result.getOutput();
 463             if (optOutput.isPresent()) {
 464                 resultData = optOutput.get();
 465                 resultNodeSchema = (ActionDefinition) context.getSchemaNode();
 466             }
 467         }
 468
 469         if (resultData != null && resultData.getValue().isEmpty()) {
 470             throw new WebApplicationException(Response.Status.NO_CONTENT);
 471         }
 472
 473         return Response.status(200).entity(new NormalizedNodeContext(new InstanceIdentifierContext<>(yangIIdContext,
 474                 resultNodeSchema, mountPoint, schemaContextRef), resultData)).build();
 475     }
 476 }