cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java

   1 /*
   2  *  ============LICENSE_START=======================================================
   3  *  Copyright (C) 2021-2023 Nordix Foundation
   4  *  Modifications Copyright (C) 2021 Pantheon.tech
   5  *  Modifications Copyright (C) 2020-2022 Bell Canada.
   6  *  Modifications Copyright (C) 2022-2023 TechMahindra Ltd.
   7  *  ================================================================================
   8  *  Licensed under the Apache License, Version 2.0 (the "License");
   9  *  you may not use this file except in compliance with the License.
  10  *  You may obtain a copy of the License at
  11  *
  12  *        http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  *  Unless required by applicable law or agreed to in writing, software
  15  *  distributed under the License is distributed on an "AS IS" BASIS,
  16  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  *  See the License for the specific language governing permissions and
  18  *  limitations under the License.
  19  *
  20  *  SPDX-License-Identifier: Apache-2.0
  21  *  ============LICENSE_END=========================================================
  22  */
  23
  24 package org.onap.cps.spi.impl;
  25
  26 import com.google.common.base.Strings;
  27 import com.google.common.collect.ImmutableSet;
  28 import com.google.common.collect.ImmutableSet.Builder;
  29 import io.micrometer.core.annotation.Timed;
  30 import java.io.Serializable;
  31 import java.util.ArrayList;
  32 import java.util.Collection;
  33 import java.util.Collections;
  34 import java.util.HashMap;
  35 import java.util.HashSet;
  36 import java.util.List;
  37 import java.util.Map;
  38 import java.util.Set;
  39 import java.util.regex.Matcher;
  40 import java.util.regex.Pattern;
  41 import java.util.stream.Collectors;
  42 import javax.transaction.Transactional;
  43 import lombok.RequiredArgsConstructor;
  44 import lombok.extern.slf4j.Slf4j;
  45 import org.hibernate.StaleStateException;
  46 import org.onap.cps.cpspath.parser.CpsPathQuery;
  47 import org.onap.cps.cpspath.parser.CpsPathUtil;
  48 import org.onap.cps.cpspath.parser.PathParsingException;
  49 import org.onap.cps.spi.CpsDataPersistenceService;
  50 import org.onap.cps.spi.FetchDescendantsOption;
  51 import org.onap.cps.spi.entities.AnchorEntity;
  52 import org.onap.cps.spi.entities.DataspaceEntity;
  53 import org.onap.cps.spi.entities.FragmentEntity;
  54 import org.onap.cps.spi.exceptions.AlreadyDefinedException;
  55 import org.onap.cps.spi.exceptions.AlreadyDefinedExceptionBatch;
  56 import org.onap.cps.spi.exceptions.ConcurrencyException;
  57 import org.onap.cps.spi.exceptions.CpsAdminException;
  58 import org.onap.cps.spi.exceptions.CpsPathException;
  59 import org.onap.cps.spi.exceptions.DataNodeNotFoundException;
  60 import org.onap.cps.spi.exceptions.DataNodeNotFoundExceptionBatch;
  61 import org.onap.cps.spi.model.DataNode;
  62 import org.onap.cps.spi.model.DataNodeBuilder;
  63 import org.onap.cps.spi.repository.AnchorRepository;
  64 import org.onap.cps.spi.repository.DataspaceRepository;
  65 import org.onap.cps.spi.repository.FragmentRepository;
  66 import org.onap.cps.spi.utils.SessionManager;
  67 import org.onap.cps.utils.JsonObjectMapper;
  68 import org.springframework.dao.DataIntegrityViolationException;
  69 import org.springframework.stereotype.Service;
  70
  71 @Service
  72 @Slf4j
  73 @RequiredArgsConstructor
  74 public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService {
  75
  76     private final DataspaceRepository dataspaceRepository;
  77     private final AnchorRepository anchorRepository;
  78     private final FragmentRepository fragmentRepository;
  79     private final JsonObjectMapper jsonObjectMapper;
  80     private final SessionManager sessionManager;
  81
  82     private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@.+?])?)";
  83     private static final String QUERY_ACROSS_ANCHORS = null;
  84     private static final AnchorEntity ALL_ANCHORS = null;
  85
  86     @Override
  87     public void addChildDataNodes(final String dataspaceName, final String anchorName,
  88                                   final String parentNodeXpath, final Collection<DataNode> dataNodes) {
  89         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
  90         addChildrenDataNodes(anchorEntity, parentNodeXpath, dataNodes);
  91     }
  92
  93     @Override
  94     public void addListElements(final String dataspaceName, final String anchorName, final String parentNodeXpath,
  95                                 final Collection<DataNode> newListElements) {
  96         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
  97         addChildrenDataNodes(anchorEntity, parentNodeXpath, newListElements);
  98     }
  99
 100     @Override
 101     public void addMultipleLists(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 102                                  final Collection<Collection<DataNode>> newLists) {
 103         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 104         final Collection<String> failedXpaths = new HashSet<>();
 105         for (final Collection<DataNode> newList : newLists) {
 106             try {
 107                 addChildrenDataNodes(anchorEntity, parentNodeXpath, newList);
 108             } catch (final AlreadyDefinedExceptionBatch e) {
 109                 failedXpaths.addAll(e.getAlreadyDefinedXpaths());
 110             }
 111         }
 112         if (!failedXpaths.isEmpty()) {
 113             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 114         }
 115     }
 116
 117     private void addNewChildDataNode(final AnchorEntity anchorEntity, final String parentNodeXpath,
 118                                      final DataNode newChild) {
 119         final FragmentEntity parentFragmentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 120         final FragmentEntity newChildAsFragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, newChild);
 121         newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 122         try {
 123             fragmentRepository.save(newChildAsFragmentEntity);
 124         } catch (final DataIntegrityViolationException e) {
 125             throw AlreadyDefinedException.forDataNode(newChild.getXpath(), anchorEntity.getName(), e);
 126         }
 127     }
 128
 129     private void addChildrenDataNodes(final AnchorEntity anchorEntity, final String parentNodeXpath,
 130                                       final Collection<DataNode> newChildren) {
 131         final FragmentEntity parentFragmentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 132         final List<FragmentEntity> fragmentEntities = new ArrayList<>(newChildren.size());
 133         try {
 134             for (final DataNode newChildAsDataNode : newChildren) {
 135                 final FragmentEntity newChildAsFragmentEntity =
 136                     convertToFragmentWithAllDescendants(anchorEntity, newChildAsDataNode);
 137                 newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 138                 fragmentEntities.add(newChildAsFragmentEntity);
 139             }
 140             fragmentRepository.saveAll(fragmentEntities);
 141         } catch (final DataIntegrityViolationException e) {
 142             log.warn("Exception occurred : {} , While saving : {} children, retrying using individual save operations",
 143                     e, fragmentEntities.size());
 144             retrySavingEachChildIndividually(anchorEntity, parentNodeXpath, newChildren);
 145         }
 146     }
 147
 148     private void retrySavingEachChildIndividually(final AnchorEntity anchorEntity, final String parentNodeXpath,
 149                                                   final Collection<DataNode> newChildren) {
 150         final Collection<String> failedXpaths = new HashSet<>();
 151         for (final DataNode newChild : newChildren) {
 152             try {
 153                 addNewChildDataNode(anchorEntity, parentNodeXpath, newChild);
 154             } catch (final AlreadyDefinedException e) {
 155                 failedXpaths.add(newChild.getXpath());
 156             }
 157         }
 158         if (!failedXpaths.isEmpty()) {
 159             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 160         }
 161     }
 162
 163     @Override
 164     public void storeDataNodes(final String dataspaceName, final String anchorName,
 165                                final Collection<DataNode> dataNodes) {
 166         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 167         final List<FragmentEntity> fragmentEntities = new ArrayList<>(dataNodes.size());
 168         try {
 169             for (final DataNode dataNode: dataNodes) {
 170                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, dataNode);
 171                 fragmentEntities.add(fragmentEntity);
 172             }
 173             fragmentRepository.saveAll(fragmentEntities);
 174         } catch (final DataIntegrityViolationException exception) {
 175             log.warn("Exception occurred : {} , While saving : {} data nodes, Retrying saving data nodes individually",
 176                     exception, dataNodes.size());
 177             storeDataNodesIndividually(anchorEntity, dataNodes);
 178         }
 179     }
 180
 181     private void storeDataNodesIndividually(final AnchorEntity anchorEntity, final Collection<DataNode> dataNodes) {
 182         final Collection<String> failedXpaths = new HashSet<>();
 183         for (final DataNode dataNode: dataNodes) {
 184             try {
 185                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, dataNode);
 186                 fragmentRepository.save(fragmentEntity);
 187             } catch (final DataIntegrityViolationException e) {
 188                 failedXpaths.add(dataNode.getXpath());
 189             }
 190         }
 191         if (!failedXpaths.isEmpty()) {
 192             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 193         }
 194     }
 195
 196     /**
 197      * Convert DataNode object into Fragment and places the result in the fragments placeholder. Performs same action
 198      * for all DataNode children recursively.
 199      *
 200      * @param anchorEntity          anchorEntity
 201      * @param dataNodeToBeConverted dataNode
 202      * @return a Fragment built from current DataNode
 203      */
 204     private FragmentEntity convertToFragmentWithAllDescendants(final AnchorEntity anchorEntity,
 205                                                                final DataNode dataNodeToBeConverted) {
 206         final FragmentEntity parentFragment = toFragmentEntity(anchorEntity, dataNodeToBeConverted);
 207         final Builder<FragmentEntity> childFragmentsImmutableSetBuilder = ImmutableSet.builder();
 208         for (final DataNode childDataNode : dataNodeToBeConverted.getChildDataNodes()) {
 209             final FragmentEntity childFragment = convertToFragmentWithAllDescendants(anchorEntity, childDataNode);
 210             childFragmentsImmutableSetBuilder.add(childFragment);
 211         }
 212         parentFragment.setChildFragments(childFragmentsImmutableSetBuilder.build());
 213         return parentFragment;
 214     }
 215
 216     private FragmentEntity toFragmentEntity(final AnchorEntity anchorEntity, final DataNode dataNode) {
 217         return FragmentEntity.builder()
 218                 .anchor(anchorEntity)
 219                 .xpath(dataNode.getXpath())
 220                 .attributes(jsonObjectMapper.asJsonString(dataNode.getLeaves()))
 221                 .build();
 222     }
 223
 224     @Override
 225     @Timed(value = "cps.data.persistence.service.datanode.get",
 226             description = "Time taken to get a data node")
 227     public Collection<DataNode> getDataNodes(final String dataspaceName, final String anchorName,
 228                                              final String xpath,
 229                                              final FetchDescendantsOption fetchDescendantsOption) {
 230         final String targetXpath = getNormalizedXpath(xpath);
 231         final Collection<DataNode> dataNodes = getDataNodesForMultipleXpaths(dataspaceName, anchorName,
 232                 Collections.singletonList(targetXpath), fetchDescendantsOption);
 233         if (dataNodes.isEmpty()) {
 234             throw new DataNodeNotFoundException(dataspaceName, anchorName, xpath);
 235         }
 236         return dataNodes;
 237     }
 238
 239     @Override
 240     @Timed(value = "cps.data.persistence.service.datanode.batch.get",
 241             description = "Time taken to get data nodes")
 242     public Collection<DataNode> getDataNodesForMultipleXpaths(final String dataspaceName, final String anchorName,
 243                                                               final Collection<String> xpaths,
 244                                                               final FetchDescendantsOption fetchDescendantsOption) {
 245         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 246         Collection<FragmentEntity> fragmentEntities = getFragmentEntities(anchorEntity, xpaths);
 247         fragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(fetchDescendantsOption,
 248                 fragmentEntities);
 249         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 250     }
 251
 252     private Collection<FragmentEntity> getFragmentEntities(final AnchorEntity anchorEntity,
 253                                                            final Collection<String> xpaths) {
 254         final Collection<String> nonRootXpaths = new HashSet<>(xpaths);
 255         final boolean haveRootXpath = nonRootXpaths.removeIf(CpsDataPersistenceServiceImpl::isRootXpath);
 256
 257         final Collection<String> normalizedXpaths = new HashSet<>(nonRootXpaths.size());
 258         for (final String xpath : nonRootXpaths) {
 259             try {
 260                 normalizedXpaths.add(CpsPathUtil.getNormalizedXpath(xpath));
 261             } catch (final PathParsingException e) {
 262                 log.warn("Error parsing xpath \"{}\": {}", xpath, e.getMessage());
 263             }
 264         }
 265         if (haveRootXpath) {
 266             normalizedXpaths.addAll(fragmentRepository.findAllXpathByAnchorAndParentIdIsNull(anchorEntity));
 267         }
 268
 269         return fragmentRepository.findByAnchorAndXpathIn(anchorEntity, normalizedXpaths);
 270     }
 271
 272     private FragmentEntity getFragmentEntity(final AnchorEntity anchorEntity, final String xpath) {
 273         final FragmentEntity fragmentEntity;
 274         if (isRootXpath(xpath)) {
 275             fragmentEntity = fragmentRepository.findOneByAnchorId(anchorEntity.getId()).orElse(null);
 276         } else {
 277             fragmentEntity = fragmentRepository.getByAnchorAndXpath(anchorEntity, getNormalizedXpath(xpath));
 278         }
 279         if (fragmentEntity == null) {
 280             throw new DataNodeNotFoundException(anchorEntity.getDataspace().getName(), anchorEntity.getName(), xpath);
 281         }
 282         return fragmentEntity;
 283     }
 284
 285     @Override
 286     @Timed(value = "cps.data.persistence.service.datanode.query",
 287             description = "Time taken to query data nodes")
 288     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
 289                                          final FetchDescendantsOption fetchDescendantsOption) {
 290         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 291         final AnchorEntity anchorEntity = Strings.isNullOrEmpty(anchorName) ? ALL_ANCHORS
 292             : anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 293         final CpsPathQuery cpsPathQuery;
 294         try {
 295             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 296         } catch (final PathParsingException e) {
 297             throw new CpsPathException(e.getMessage());
 298         }
 299
 300         Collection<FragmentEntity> fragmentEntities;
 301         if (anchorEntity == ALL_ANCHORS) {
 302             fragmentEntities = fragmentRepository.findByDataspaceAndCpsPath(dataspaceEntity, cpsPathQuery);
 303         } else {
 304             fragmentEntities = fragmentRepository.findByAnchorAndCpsPath(anchorEntity, cpsPathQuery);
 305         }
 306         if (cpsPathQuery.hasAncestorAxis()) {
 307             final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 308             if (anchorEntity == ALL_ANCHORS) {
 309                 fragmentEntities = fragmentRepository.findByDataspaceAndXpathIn(dataspaceEntity, ancestorXpaths);
 310             } else {
 311                 fragmentEntities = fragmentRepository.findByAnchorAndXpathIn(anchorEntity, ancestorXpaths);
 312             }
 313         }
 314         fragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(fetchDescendantsOption,
 315                 fragmentEntities);
 316         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 317     }
 318
 319     @Override
 320     public List<DataNode> queryDataNodesAcrossAnchors(final String dataspaceName, final String cpsPath,
 321                                                       final FetchDescendantsOption fetchDescendantsOption) {
 322         return queryDataNodes(dataspaceName, QUERY_ACROSS_ANCHORS, cpsPath, fetchDescendantsOption);
 323     }
 324
 325     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 326                                                                final Collection<FragmentEntity> fragmentEntities) {
 327         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 328         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 329             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 330         }
 331         return Collections.unmodifiableList(dataNodes);
 332     }
 333
 334     private static String getNormalizedXpath(final String xpathSource) {
 335         if (isRootXpath(xpathSource)) {
 336             return xpathSource;
 337         }
 338         try {
 339             return CpsPathUtil.getNormalizedXpath(xpathSource);
 340         } catch (final PathParsingException e) {
 341             throw new CpsPathException(e.getMessage());
 342         }
 343     }
 344
 345     @Override
 346     public String startSession() {
 347         return sessionManager.startSession();
 348     }
 349
 350     @Override
 351     public void closeSession(final String sessionId) {
 352         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 353     }
 354
 355     @Override
 356     public void lockAnchor(final String sessionId, final String dataspaceName,
 357                            final String anchorName, final Long timeoutInMilliseconds) {
 358         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 359     }
 360
 361     private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
 362                                                     final CpsPathQuery cpsPathQuery) {
 363         final Set<String> ancestorXpath = new HashSet<>();
 364         final Pattern pattern =
 365                 Pattern.compile("(.*/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 366                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "/.*");
 367         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 368             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 369             if (matcher.matches()) {
 370                 ancestorXpath.add(matcher.group(1));
 371             }
 372         }
 373         return ancestorXpath;
 374     }
 375
 376     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 377                                 final FetchDescendantsOption fetchDescendantsOption) {
 378         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 379         Map<String, Serializable> leaves = new HashMap<>();
 380         if (fragmentEntity.getAttributes() != null) {
 381             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 382         }
 383         return new DataNodeBuilder()
 384                 .withXpath(fragmentEntity.getXpath())
 385                 .withLeaves(leaves)
 386                 .withDataspace(fragmentEntity.getAnchor().getDataspace().getName())
 387                 .withAnchor(fragmentEntity.getAnchor().getName())
 388                 .withChildDataNodes(childDataNodes).build();
 389     }
 390
 391     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
 392                                              final FetchDescendantsOption fetchDescendantsOption) {
 393         if (fetchDescendantsOption.hasNext()) {
 394             return fragmentEntity.getChildFragments().stream()
 395                     .map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
 396                     .collect(Collectors.toList());
 397         }
 398         return Collections.emptyList();
 399     }
 400
 401     @Override
 402     public void batchUpdateDataLeaves(final String dataspaceName, final String anchorName,
 403                                         final Map<String, Map<String, Serializable>> updatedLeavesPerXPath) {
 404         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 405
 406         final Collection<String> xpathsOfUpdatedLeaves = updatedLeavesPerXPath.keySet();
 407         final Collection<FragmentEntity> fragmentEntities = getFragmentEntities(anchorEntity, xpathsOfUpdatedLeaves);
 408
 409         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 410             final Map<String, Serializable> updatedLeaves = updatedLeavesPerXPath.get(fragmentEntity.getXpath());
 411             final String mergedLeaves = mergeLeaves(updatedLeaves, fragmentEntity.getAttributes());
 412             fragmentEntity.setAttributes(mergedLeaves);
 413         }
 414
 415         try {
 416             fragmentRepository.saveAll(fragmentEntities);
 417         } catch (final StaleStateException staleStateException) {
 418             retryUpdateDataNodesIndividually(anchorEntity, fragmentEntities);
 419         }
 420     }
 421
 422     @Override
 423     public void updateDataNodesAndDescendants(final String dataspaceName, final String anchorName,
 424                                               final Collection<DataNode> updatedDataNodes) {
 425         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 426
 427         final Map<String, DataNode> xpathToUpdatedDataNode = updatedDataNodes.stream()
 428             .collect(Collectors.toMap(DataNode::getXpath, dataNode -> dataNode));
 429
 430         final Collection<String> xpaths = xpathToUpdatedDataNode.keySet();
 431         Collection<FragmentEntity> existingFragmentEntities = getFragmentEntities(anchorEntity, xpaths);
 432         existingFragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(
 433                 FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS, existingFragmentEntities);
 434
 435         for (final FragmentEntity existingFragmentEntity : existingFragmentEntities) {
 436             final DataNode updatedDataNode = xpathToUpdatedDataNode.get(existingFragmentEntity.getXpath());
 437             updateFragmentEntityAndDescendantsWithDataNode(existingFragmentEntity, updatedDataNode);
 438         }
 439
 440         try {
 441             fragmentRepository.saveAll(existingFragmentEntities);
 442         } catch (final StaleStateException staleStateException) {
 443             retryUpdateDataNodesIndividually(anchorEntity, existingFragmentEntities);
 444         }
 445     }
 446
 447     private void retryUpdateDataNodesIndividually(final AnchorEntity anchorEntity,
 448                                                   final Collection<FragmentEntity> fragmentEntities) {
 449         final Collection<String> failedXpaths = new HashSet<>();
 450         for (final FragmentEntity dataNodeFragment : fragmentEntities) {
 451             try {
 452                 fragmentRepository.save(dataNodeFragment);
 453             } catch (final StaleStateException e) {
 454                 failedXpaths.add(dataNodeFragment.getXpath());
 455             }
 456         }
 457         if (!failedXpaths.isEmpty()) {
 458             final String failedXpathsConcatenated = String.join(",", failedXpaths);
 459             throw new ConcurrencyException("Concurrent Transactions", String.format(
 460                     "DataNodes : %s in Dataspace :'%s' with Anchor : '%s'  are updated by another transaction.",
 461                     failedXpathsConcatenated, anchorEntity.getDataspace().getName(), anchorEntity.getName()));
 462         }
 463     }
 464
 465     private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
 466                                                                 final DataNode newDataNode) {
 467         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 468
 469         final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
 470                 .collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
 471
 472         final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
 473         for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
 474             final FragmentEntity childFragment;
 475             if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
 476                 childFragment = convertToFragmentWithAllDescendants(existingFragmentEntity.getAnchor(),
 477                     newDataNodeChild);
 478             } else {
 479                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
 480                 updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
 481             }
 482             updatedChildFragments.add(childFragment);
 483         }
 484
 485         existingFragmentEntity.getChildFragments().clear();
 486         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
 487     }
 488
 489     @Override
 490     @Transactional
 491     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 492                                    final Collection<DataNode> newListElements) {
 493         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 494         final FragmentEntity parentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 495         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
 496         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
 497                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
 498         parentEntity.getChildFragments().removeAll(existingListElementFragmentEntitiesByXPath.values());
 499         final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
 500         for (final DataNode newListElement : newListElements) {
 501             final FragmentEntity existingListElementEntity =
 502                     existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
 503             final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
 504                     existingListElementEntity);
 505             updatedChildFragmentEntities.add(entityToBeAdded);
 506         }
 507         parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
 508         fragmentRepository.save(parentEntity);
 509     }
 510
 511     @Override
 512     @Transactional
 513     public void deleteDataNodes(final String dataspaceName, final String anchorName) {
 514         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 515         anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
 516             .ifPresent(anchorEntity -> fragmentRepository.deleteByAnchorIn(Collections.singletonList(anchorEntity)));
 517     }
 518
 519     @Override
 520     @Transactional
 521     public void deleteDataNodes(final String dataspaceName, final Collection<String> anchorNames) {
 522         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 523         final Collection<AnchorEntity> anchorEntities =
 524             anchorRepository.findAllByDataspaceAndNameIn(dataspaceEntity, anchorNames);
 525         fragmentRepository.deleteByAnchorIn(anchorEntities);
 526     }
 527
 528     @Override
 529     @Transactional
 530     public void deleteDataNodes(final String dataspaceName, final String anchorName,
 531                                 final Collection<String> xpathsToDelete) {
 532         deleteDataNodes(dataspaceName, anchorName, xpathsToDelete, false);
 533     }
 534
 535     private void deleteDataNodes(final String dataspaceName, final String anchorName,
 536                                  final Collection<String> xpathsToDelete, final boolean onlySupportListDeletion) {
 537         final boolean haveRootXpath = xpathsToDelete.stream().anyMatch(CpsDataPersistenceServiceImpl::isRootXpath);
 538         if (haveRootXpath) {
 539             deleteDataNodes(dataspaceName, anchorName);
 540             return;
 541         }
 542
 543         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 544
 545         final Collection<String> deleteChecklist = new HashSet<>(xpathsToDelete.size());
 546         for (final String xpath : xpathsToDelete) {
 547             try {
 548                 deleteChecklist.add(CpsPathUtil.getNormalizedXpath(xpath));
 549             } catch (final PathParsingException e) {
 550                 log.warn("Error parsing xpath \"{}\": {}", xpath, e.getMessage());
 551             }
 552         }
 553
 554         final Collection<String> xpathsToExistingContainers =
 555             fragmentRepository.findAllXpathByAnchorAndXpathIn(anchorEntity, deleteChecklist);
 556         if (onlySupportListDeletion) {
 557             final Collection<String> xpathsToExistingListElements = xpathsToExistingContainers.stream()
 558                 .filter(CpsPathUtil::isPathToListElement).collect(Collectors.toList());
 559             deleteChecklist.removeAll(xpathsToExistingListElements);
 560         } else {
 561             deleteChecklist.removeAll(xpathsToExistingContainers);
 562         }
 563
 564         final Collection<String> xpathsToExistingLists = deleteChecklist.stream()
 565             .filter(xpath -> fragmentRepository.existsByAnchorAndXpathStartsWith(anchorEntity, xpath + "["))
 566             .collect(Collectors.toList());
 567         deleteChecklist.removeAll(xpathsToExistingLists);
 568
 569         if (!deleteChecklist.isEmpty()) {
 570             throw new DataNodeNotFoundExceptionBatch(dataspaceName, anchorName, deleteChecklist);
 571         }
 572
 573         fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingContainers);
 574         fragmentRepository.deleteListsByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingLists);
 575     }
 576
 577     @Override
 578     @Transactional
 579     public void deleteListDataNode(final String dataspaceName, final String anchorName,
 580                                    final String targetXpath) {
 581         deleteDataNode(dataspaceName, anchorName, targetXpath, true);
 582     }
 583
 584     @Override
 585     @Transactional
 586     public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
 587         deleteDataNode(dataspaceName, anchorName, targetXpath, false);
 588     }
 589
 590     private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
 591                                 final boolean onlySupportListNodeDeletion) {
 592         final String normalizedXpath = getNormalizedXpath(targetXpath);
 593         try {
 594             deleteDataNodes(dataspaceName, anchorName, Collections.singletonList(normalizedXpath),
 595                 onlySupportListNodeDeletion);
 596         } catch (final DataNodeNotFoundExceptionBatch dataNodeNotFoundExceptionBatch) {
 597             throw new DataNodeNotFoundException(dataspaceName, anchorName, targetXpath);
 598         }
 599     }
 600
 601     private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
 602         if (newListElements.isEmpty()) {
 603             throw new CpsAdminException("Invalid list replacement",
 604                     "Cannot replace list elements with empty collection");
 605         }
 606         final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
 607         return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
 608     }
 609
 610     private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
 611                                                      final DataNode newListElement,
 612                                                      final FragmentEntity existingListElementEntity) {
 613         if (existingListElementEntity == null) {
 614             return convertToFragmentWithAllDescendants(parentEntity.getAnchor(), newListElement);
 615         }
 616         if (newListElement.getChildDataNodes().isEmpty()) {
 617             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
 618             existingListElementEntity.getChildFragments().clear();
 619         } else {
 620             updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
 621         }
 622         return existingListElementEntity;
 623     }
 624
 625     private static boolean isNewDataNode(final DataNode replacementDataNode,
 626                                          final Map<String, FragmentEntity> existingListElementsByXpath) {
 627         return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
 628     }
 629
 630     private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
 631                                                   final DataNode newListElement) {
 632         final FragmentEntity replacementFragmentEntity =
 633                 FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
 634                         newListElement.getLeaves())).build();
 635         existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
 636     }
 637
 638     private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
 639             final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
 640         return childEntities.stream()
 641                 .filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
 642                 .collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
 643     }
 644
 645     private static boolean isRootXpath(final String xpath) {
 646         return "/".equals(xpath) || "".equals(xpath);
 647     }
 648
 649     private String mergeLeaves(final Map<String, Serializable> updateLeaves, final String currentLeavesAsString) {
 650         Map<String, Serializable> currentLeavesAsMap = new HashMap<>();
 651         if (currentLeavesAsString != null) {
 652             currentLeavesAsMap = jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
 653             currentLeavesAsMap.putAll(updateLeaves);
 654         }
 655
 656         if (currentLeavesAsMap.isEmpty()) {
 657             return "";
 658         }
 659         return jsonObjectMapper.asJsonString(currentLeavesAsMap);
 660     }
 661
 662     private AnchorEntity getAnchorEntity(final String dataspaceName, final String anchorName) {
 663         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 664         return anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 665     }
 666 }