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         final Collection<FragmentEntity> fragmentEntities =
 247             getFragmentEntities(anchorEntity, xpaths, fetchDescendantsOption);
 248         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 249     }
 250
 251     private Collection<FragmentEntity> getFragmentEntities(final AnchorEntity anchorEntity,
 252                                                            final Collection<String> xpaths,
 253                                                            final FetchDescendantsOption fetchDescendantsOption) {
 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         final List<FragmentEntity> fragmentEntities = fragmentRepository.findByAnchorAndXpathIn(anchorEntity,
 270                 normalizedXpaths);
 271
 272         return fragmentRepository.prefetchDescendantsOfFragmentEntities(fetchDescendantsOption, fragmentEntities);
 273     }
 274
 275     private FragmentEntity getFragmentEntity(final AnchorEntity anchorEntity, final String xpath) {
 276         final FragmentEntity fragmentEntity;
 277         if (isRootXpath(xpath)) {
 278             fragmentEntity = fragmentRepository.findOneByAnchorId(anchorEntity.getId()).orElse(null);
 279         } else {
 280             fragmentEntity = fragmentRepository.getByAnchorAndXpath(anchorEntity, getNormalizedXpath(xpath));
 281         }
 282         if (fragmentEntity == null) {
 283             throw new DataNodeNotFoundException(anchorEntity.getDataspace().getName(), anchorEntity.getName(), xpath);
 284         }
 285         return fragmentEntity;
 286     }
 287
 288     @Override
 289     @Timed(value = "cps.data.persistence.service.datanode.query",
 290             description = "Time taken to query data nodes")
 291     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
 292                                          final FetchDescendantsOption fetchDescendantsOption) {
 293         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 294         final AnchorEntity anchorEntity = Strings.isNullOrEmpty(anchorName) ? ALL_ANCHORS
 295             : anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 296         final CpsPathQuery cpsPathQuery;
 297         try {
 298             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 299         } catch (final PathParsingException e) {
 300             throw new CpsPathException(e.getMessage());
 301         }
 302
 303         Collection<FragmentEntity> fragmentEntities;
 304         if (anchorEntity == ALL_ANCHORS) {
 305             fragmentEntities = fragmentRepository.findByDataspaceAndCpsPath(dataspaceEntity, cpsPathQuery);
 306         } else {
 307             fragmentEntities = fragmentRepository.findByAnchorAndCpsPath(anchorEntity, cpsPathQuery);
 308         }
 309         if (cpsPathQuery.hasAncestorAxis()) {
 310             final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 311             if (anchorEntity == ALL_ANCHORS) {
 312                 fragmentEntities = fragmentRepository.findByDataspaceAndXpathIn(dataspaceEntity, ancestorXpaths);
 313             } else {
 314                 fragmentEntities = fragmentRepository.findByAnchorAndXpathIn(anchorEntity, ancestorXpaths);
 315             }
 316         }
 317         fragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(fetchDescendantsOption,
 318                 fragmentEntities);
 319         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 320     }
 321
 322     @Override
 323     public List<DataNode> queryDataNodesAcrossAnchors(final String dataspaceName, final String cpsPath,
 324                                                       final FetchDescendantsOption fetchDescendantsOption) {
 325         return queryDataNodes(dataspaceName, QUERY_ACROSS_ANCHORS, cpsPath, fetchDescendantsOption);
 326     }
 327
 328     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 329                                                                final Collection<FragmentEntity> fragmentEntities) {
 330         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 331         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 332             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 333         }
 334         return Collections.unmodifiableList(dataNodes);
 335     }
 336
 337     private static String getNormalizedXpath(final String xpathSource) {
 338         if (isRootXpath(xpathSource)) {
 339             return xpathSource;
 340         }
 341         try {
 342             return CpsPathUtil.getNormalizedXpath(xpathSource);
 343         } catch (final PathParsingException e) {
 344             throw new CpsPathException(e.getMessage());
 345         }
 346     }
 347
 348     @Override
 349     public String startSession() {
 350         return sessionManager.startSession();
 351     }
 352
 353     @Override
 354     public void closeSession(final String sessionId) {
 355         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 356     }
 357
 358     @Override
 359     public void lockAnchor(final String sessionId, final String dataspaceName,
 360                            final String anchorName, final Long timeoutInMilliseconds) {
 361         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 362     }
 363
 364     private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
 365                                                     final CpsPathQuery cpsPathQuery) {
 366         final Set<String> ancestorXpath = new HashSet<>();
 367         final Pattern pattern =
 368                 Pattern.compile("(.*/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 369                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "/.*");
 370         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 371             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 372             if (matcher.matches()) {
 373                 ancestorXpath.add(matcher.group(1));
 374             }
 375         }
 376         return ancestorXpath;
 377     }
 378
 379     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 380                                 final FetchDescendantsOption fetchDescendantsOption) {
 381         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 382         Map<String, Serializable> leaves = new HashMap<>();
 383         if (fragmentEntity.getAttributes() != null) {
 384             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 385         }
 386         return new DataNodeBuilder()
 387                 .withXpath(fragmentEntity.getXpath())
 388                 .withLeaves(leaves)
 389                 .withDataspace(fragmentEntity.getAnchor().getDataspace().getName())
 390                 .withAnchor(fragmentEntity.getAnchor().getName())
 391                 .withChildDataNodes(childDataNodes).build();
 392     }
 393
 394     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
 395                                              final FetchDescendantsOption fetchDescendantsOption) {
 396         if (fetchDescendantsOption.hasNext()) {
 397             return fragmentEntity.getChildFragments().stream()
 398                     .map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
 399                     .collect(Collectors.toList());
 400         }
 401         return Collections.emptyList();
 402     }
 403
 404     @Override
 405     public void batchUpdateDataLeaves(final String dataspaceName, final String anchorName,
 406                                         final Map<String, Map<String, Serializable>> updatedLeavesPerXPath) {
 407         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 408
 409         final Collection<String> xpathsOfUpdatedLeaves = updatedLeavesPerXPath.keySet();
 410         final Collection<FragmentEntity> fragmentEntities = getFragmentEntities(anchorEntity, xpathsOfUpdatedLeaves,
 411                 FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
 412
 413         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 414             final Map<String, Serializable> updatedLeaves = updatedLeavesPerXPath.get(fragmentEntity.getXpath());
 415             final String mergedLeaves = mergeLeaves(updatedLeaves, fragmentEntity.getAttributes());
 416             fragmentEntity.setAttributes(mergedLeaves);
 417         }
 418
 419         try {
 420             fragmentRepository.saveAll(fragmentEntities);
 421         } catch (final StaleStateException staleStateException) {
 422             retryUpdateDataNodesIndividually(anchorEntity, fragmentEntities);
 423         }
 424     }
 425
 426     @Override
 427     public void updateDataNodesAndDescendants(final String dataspaceName, final String anchorName,
 428                                               final Collection<DataNode> updatedDataNodes) {
 429         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 430
 431         final Map<String, DataNode> xpathToUpdatedDataNode = updatedDataNodes.stream()
 432             .collect(Collectors.toMap(DataNode::getXpath, dataNode -> dataNode));
 433
 434         final Collection<String> xpaths = xpathToUpdatedDataNode.keySet();
 435         final Collection<FragmentEntity> existingFragmentEntities =
 436             getFragmentEntities(anchorEntity, xpaths, FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
 437
 438         for (final FragmentEntity existingFragmentEntity : existingFragmentEntities) {
 439             final DataNode updatedDataNode = xpathToUpdatedDataNode.get(existingFragmentEntity.getXpath());
 440             updateFragmentEntityAndDescendantsWithDataNode(existingFragmentEntity, updatedDataNode);
 441         }
 442
 443         try {
 444             fragmentRepository.saveAll(existingFragmentEntities);
 445         } catch (final StaleStateException staleStateException) {
 446             retryUpdateDataNodesIndividually(anchorEntity, existingFragmentEntities);
 447         }
 448     }
 449
 450     private void retryUpdateDataNodesIndividually(final AnchorEntity anchorEntity,
 451                                                   final Collection<FragmentEntity> fragmentEntities) {
 452         final Collection<String> failedXpaths = new HashSet<>();
 453         for (final FragmentEntity dataNodeFragment : fragmentEntities) {
 454             try {
 455                 fragmentRepository.save(dataNodeFragment);
 456             } catch (final StaleStateException e) {
 457                 failedXpaths.add(dataNodeFragment.getXpath());
 458             }
 459         }
 460         if (!failedXpaths.isEmpty()) {
 461             final String failedXpathsConcatenated = String.join(",", failedXpaths);
 462             throw new ConcurrencyException("Concurrent Transactions", String.format(
 463                     "DataNodes : %s in Dataspace :'%s' with Anchor : '%s'  are updated by another transaction.",
 464                     failedXpathsConcatenated, anchorEntity.getDataspace().getName(), anchorEntity.getName()));
 465         }
 466     }
 467
 468     private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
 469                                                                 final DataNode newDataNode) {
 470         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 471
 472         final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
 473                 .collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
 474
 475         final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
 476         for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
 477             final FragmentEntity childFragment;
 478             if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
 479                 childFragment = convertToFragmentWithAllDescendants(existingFragmentEntity.getAnchor(),
 480                     newDataNodeChild);
 481             } else {
 482                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
 483                 updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
 484             }
 485             updatedChildFragments.add(childFragment);
 486         }
 487
 488         existingFragmentEntity.getChildFragments().clear();
 489         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
 490     }
 491
 492     @Override
 493     @Transactional
 494     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 495                                    final Collection<DataNode> newListElements) {
 496         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 497         final FragmentEntity parentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 498         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
 499         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
 500                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
 501         parentEntity.getChildFragments().removeAll(existingListElementFragmentEntitiesByXPath.values());
 502         final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
 503         for (final DataNode newListElement : newListElements) {
 504             final FragmentEntity existingListElementEntity =
 505                     existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
 506             final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
 507                     existingListElementEntity);
 508             updatedChildFragmentEntities.add(entityToBeAdded);
 509         }
 510         parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
 511         fragmentRepository.save(parentEntity);
 512     }
 513
 514     @Override
 515     @Transactional
 516     public void deleteDataNodes(final String dataspaceName, final String anchorName) {
 517         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 518         anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
 519             .ifPresent(anchorEntity -> fragmentRepository.deleteByAnchorIn(Collections.singletonList(anchorEntity)));
 520     }
 521
 522     @Override
 523     @Transactional
 524     public void deleteDataNodes(final String dataspaceName, final Collection<String> anchorNames) {
 525         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 526         final Collection<AnchorEntity> anchorEntities =
 527             anchorRepository.findAllByDataspaceAndNameIn(dataspaceEntity, anchorNames);
 528         fragmentRepository.deleteByAnchorIn(anchorEntities);
 529     }
 530
 531     @Override
 532     @Transactional
 533     public void deleteDataNodes(final String dataspaceName, final String anchorName,
 534                                 final Collection<String> xpathsToDelete) {
 535         deleteDataNodes(dataspaceName, anchorName, xpathsToDelete, false);
 536     }
 537
 538     private void deleteDataNodes(final String dataspaceName, final String anchorName,
 539                                  final Collection<String> xpathsToDelete, final boolean onlySupportListDeletion) {
 540         final boolean haveRootXpath = xpathsToDelete.stream().anyMatch(CpsDataPersistenceServiceImpl::isRootXpath);
 541         if (haveRootXpath) {
 542             deleteDataNodes(dataspaceName, anchorName);
 543             return;
 544         }
 545
 546         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 547
 548         final Collection<String> deleteChecklist = new HashSet<>(xpathsToDelete.size());
 549         for (final String xpath : xpathsToDelete) {
 550             try {
 551                 deleteChecklist.add(CpsPathUtil.getNormalizedXpath(xpath));
 552             } catch (final PathParsingException e) {
 553                 log.warn("Error parsing xpath \"{}\": {}", xpath, e.getMessage());
 554             }
 555         }
 556
 557         final Collection<String> xpathsToExistingContainers =
 558             fragmentRepository.findAllXpathByAnchorAndXpathIn(anchorEntity, deleteChecklist);
 559         if (onlySupportListDeletion) {
 560             final Collection<String> xpathsToExistingListElements = xpathsToExistingContainers.stream()
 561                 .filter(CpsPathUtil::isPathToListElement).collect(Collectors.toList());
 562             deleteChecklist.removeAll(xpathsToExistingListElements);
 563         } else {
 564             deleteChecklist.removeAll(xpathsToExistingContainers);
 565         }
 566
 567         final Collection<String> xpathsToExistingLists = deleteChecklist.stream()
 568             .filter(xpath -> fragmentRepository.existsByAnchorAndXpathStartsWith(anchorEntity, xpath + "["))
 569             .collect(Collectors.toList());
 570         deleteChecklist.removeAll(xpathsToExistingLists);
 571
 572         if (!deleteChecklist.isEmpty()) {
 573             throw new DataNodeNotFoundExceptionBatch(dataspaceName, anchorName, deleteChecklist);
 574         }
 575
 576         fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingContainers);
 577         fragmentRepository.deleteListsByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingLists);
 578     }
 579
 580     @Override
 581     @Transactional
 582     public void deleteListDataNode(final String dataspaceName, final String anchorName,
 583                                    final String targetXpath) {
 584         deleteDataNode(dataspaceName, anchorName, targetXpath, true);
 585     }
 586
 587     @Override
 588     @Transactional
 589     public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
 590         deleteDataNode(dataspaceName, anchorName, targetXpath, false);
 591     }
 592
 593     private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
 594                                 final boolean onlySupportListNodeDeletion) {
 595         final String normalizedXpath = getNormalizedXpath(targetXpath);
 596         try {
 597             deleteDataNodes(dataspaceName, anchorName, Collections.singletonList(normalizedXpath),
 598                 onlySupportListNodeDeletion);
 599         } catch (final DataNodeNotFoundExceptionBatch dataNodeNotFoundExceptionBatch) {
 600             throw new DataNodeNotFoundException(dataspaceName, anchorName, targetXpath);
 601         }
 602     }
 603
 604     private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
 605         if (newListElements.isEmpty()) {
 606             throw new CpsAdminException("Invalid list replacement",
 607                     "Cannot replace list elements with empty collection");
 608         }
 609         final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
 610         return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
 611     }
 612
 613     private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
 614                                                      final DataNode newListElement,
 615                                                      final FragmentEntity existingListElementEntity) {
 616         if (existingListElementEntity == null) {
 617             return convertToFragmentWithAllDescendants(parentEntity.getAnchor(), newListElement);
 618         }
 619         if (newListElement.getChildDataNodes().isEmpty()) {
 620             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
 621             existingListElementEntity.getChildFragments().clear();
 622         } else {
 623             updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
 624         }
 625         return existingListElementEntity;
 626     }
 627
 628     private static boolean isNewDataNode(final DataNode replacementDataNode,
 629                                          final Map<String, FragmentEntity> existingListElementsByXpath) {
 630         return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
 631     }
 632
 633     private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
 634                                                   final DataNode newListElement) {
 635         final FragmentEntity replacementFragmentEntity =
 636                 FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
 637                         newListElement.getLeaves())).build();
 638         existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
 639     }
 640
 641     private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
 642             final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
 643         return childEntities.stream()
 644                 .filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
 645                 .collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
 646     }
 647
 648     private static boolean isRootXpath(final String xpath) {
 649         return "/".equals(xpath) || "".equals(xpath);
 650     }
 651
 652     private String mergeLeaves(final Map<String, Serializable> updateLeaves, final String currentLeavesAsString) {
 653         Map<String, Serializable> currentLeavesAsMap = new HashMap<>();
 654         if (currentLeavesAsString != null) {
 655             currentLeavesAsMap = jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
 656             currentLeavesAsMap.putAll(updateLeaves);
 657         }
 658
 659         if (currentLeavesAsMap.isEmpty()) {
 660             return "";
 661         }
 662         return jsonObjectMapper.asJsonString(currentLeavesAsMap);
 663     }
 664
 665     private AnchorEntity getAnchorEntity(final String dataspaceName, final String anchorName) {
 666         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 667         return anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 668     }
 669 }