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 static org.onap.cps.spi.PaginationOption.NO_PAGINATION;
  27
  28 import com.google.common.collect.ImmutableSet;
  29 import com.google.common.collect.ImmutableSet.Builder;
  30 import io.micrometer.core.annotation.Timed;
  31 import java.io.Serializable;
  32 import java.util.ArrayList;
  33 import java.util.Collection;
  34 import java.util.Collections;
  35 import java.util.HashMap;
  36 import java.util.HashSet;
  37 import java.util.List;
  38 import java.util.Map;
  39 import java.util.Set;
  40 import java.util.regex.Matcher;
  41 import java.util.regex.Pattern;
  42 import java.util.stream.Collectors;
  43 import javax.transaction.Transactional;
  44 import lombok.RequiredArgsConstructor;
  45 import lombok.extern.slf4j.Slf4j;
  46 import org.hibernate.StaleStateException;
  47 import org.onap.cps.cpspath.parser.CpsPathQuery;
  48 import org.onap.cps.cpspath.parser.CpsPathUtil;
  49 import org.onap.cps.cpspath.parser.PathParsingException;
  50 import org.onap.cps.spi.CpsDataPersistenceService;
  51 import org.onap.cps.spi.FetchDescendantsOption;
  52 import org.onap.cps.spi.PaginationOption;
  53 import org.onap.cps.spi.entities.AnchorEntity;
  54 import org.onap.cps.spi.entities.DataspaceEntity;
  55 import org.onap.cps.spi.entities.FragmentEntity;
  56 import org.onap.cps.spi.exceptions.AlreadyDefinedException;
  57 import org.onap.cps.spi.exceptions.ConcurrencyException;
  58 import org.onap.cps.spi.exceptions.CpsAdminException;
  59 import org.onap.cps.spi.exceptions.CpsPathException;
  60 import org.onap.cps.spi.exceptions.DataNodeNotFoundException;
  61 import org.onap.cps.spi.exceptions.DataNodeNotFoundExceptionBatch;
  62 import org.onap.cps.spi.model.DataNode;
  63 import org.onap.cps.spi.model.DataNodeBuilder;
  64 import org.onap.cps.spi.repository.AnchorRepository;
  65 import org.onap.cps.spi.repository.DataspaceRepository;
  66 import org.onap.cps.spi.repository.FragmentRepository;
  67 import org.onap.cps.spi.utils.SessionManager;
  68 import org.onap.cps.utils.JsonObjectMapper;
  69 import org.springframework.dao.DataIntegrityViolationException;
  70 import org.springframework.stereotype.Service;
  71
  72 @Service
  73 @Slf4j
  74 @RequiredArgsConstructor
  75 public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService {
  76
  77     private final DataspaceRepository dataspaceRepository;
  78     private final AnchorRepository anchorRepository;
  79     private final FragmentRepository fragmentRepository;
  80     private final JsonObjectMapper jsonObjectMapper;
  81     private final SessionManager sessionManager;
  82
  83     private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@.+?])?)";
  84
  85     @Override
  86     public void addChildDataNodes(final String dataspaceName, final String anchorName,
  87                                   final String parentNodeXpath, final Collection<DataNode> dataNodes) {
  88         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
  89         addChildrenDataNodes(anchorEntity, parentNodeXpath, dataNodes);
  90     }
  91
  92     @Override
  93     public void addListElements(final String dataspaceName, final String anchorName, final String parentNodeXpath,
  94                                 final Collection<DataNode> newListElements) {
  95         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
  96         addChildrenDataNodes(anchorEntity, parentNodeXpath, newListElements);
  97     }
  98
  99     @Override
 100     public void addMultipleLists(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 101                                  final Collection<Collection<DataNode>> newLists) {
 102         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 103         final Collection<String> failedXpaths = new HashSet<>();
 104         for (final Collection<DataNode> newList : newLists) {
 105             try {
 106                 addChildrenDataNodes(anchorEntity, parentNodeXpath, newList);
 107             } catch (final AlreadyDefinedException alreadyDefinedException) {
 108                 failedXpaths.addAll(alreadyDefinedException.getAlreadyDefinedObjectNames());
 109             }
 110         }
 111         if (!failedXpaths.isEmpty()) {
 112             throw AlreadyDefinedException.forDataNodes(failedXpaths, anchorEntity.getName());
 113         }
 114     }
 115
 116     private void addNewChildDataNode(final AnchorEntity anchorEntity, final String parentNodeXpath,
 117                                      final DataNode newChild) {
 118         final FragmentEntity parentFragmentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 119         final FragmentEntity newChildAsFragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, newChild);
 120         newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 121         try {
 122             fragmentRepository.save(newChildAsFragmentEntity);
 123         } catch (final DataIntegrityViolationException dataIntegrityViolationException) {
 124             throw AlreadyDefinedException.forDataNodes(Collections.singletonList(newChild.getXpath()),
 125                     anchorEntity.getName());
 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 dataIntegrityViolationException) {
 142             log.warn("Exception occurred : {} , While saving : {} children, retrying using individual save operations",
 143                     dataIntegrityViolationException, 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 alreadyDefinedException) {
 155                 failedXpaths.add(newChild.getXpath());
 156             }
 157         }
 158         if (!failedXpaths.isEmpty()) {
 159             throw AlreadyDefinedException.forDataNodes(failedXpaths, anchorEntity.getName());
 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 dataIntegrityViolationException) {
 188                 failedXpaths.add(dataNode.getXpath());
 189             }
 190         }
 191         if (!failedXpaths.isEmpty()) {
 192             throw AlreadyDefinedException.forDataNodes(failedXpaths, anchorEntity.getName());
 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> normalizedXpaths = getNormalizedXpaths(xpaths);
 255
 256         final boolean haveRootXpath = normalizedXpaths.removeIf(CpsDataPersistenceServiceImpl::isRootXpath);
 257
 258         final List<FragmentEntity> fragmentEntities = fragmentRepository.findByAnchorAndXpathIn(anchorEntity,
 259                 normalizedXpaths);
 260
 261         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 262             normalizedXpaths.remove(fragmentEntity.getXpath());
 263         }
 264
 265         for (final String xpath : normalizedXpaths) {
 266             if (!CpsPathUtil.isPathToListElement(xpath)) {
 267                 fragmentEntities.addAll(fragmentRepository.findListByAnchorAndXpath(anchorEntity, xpath));
 268             }
 269         }
 270
 271         if (haveRootXpath) {
 272             fragmentEntities.addAll(fragmentRepository.findRootsByAnchorId(anchorEntity.getId()));
 273         }
 274
 275         return fragmentEntities;
 276     }
 277
 278     private FragmentEntity getFragmentEntity(final AnchorEntity anchorEntity, final String xpath) {
 279         final FragmentEntity fragmentEntity;
 280         if (isRootXpath(xpath)) {
 281             fragmentEntity = fragmentRepository.findOneByAnchorId(anchorEntity.getId()).orElse(null);
 282         } else {
 283             fragmentEntity = fragmentRepository.getByAnchorAndXpath(anchorEntity, getNormalizedXpath(xpath));
 284         }
 285         if (fragmentEntity == null) {
 286             throw new DataNodeNotFoundException(anchorEntity.getDataspace().getName(), anchorEntity.getName(), xpath);
 287         }
 288         return fragmentEntity;
 289     }
 290
 291     @Override
 292     @Timed(value = "cps.data.persistence.service.datanode.query",
 293             description = "Time taken to query data nodes")
 294     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
 295                                          final FetchDescendantsOption fetchDescendantsOption) {
 296         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 297         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 298         final CpsPathQuery cpsPathQuery;
 299         try {
 300             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 301         } catch (final PathParsingException pathParsingException) {
 302             throw new CpsPathException(pathParsingException.getMessage());
 303         }
 304
 305         Collection<FragmentEntity> fragmentEntities;
 306         fragmentEntities = fragmentRepository.findByAnchorAndCpsPath(anchorEntity, cpsPathQuery);
 307         if (cpsPathQuery.hasAncestorAxis()) {
 308             final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 309             fragmentEntities = fragmentRepository.findByAnchorAndXpathIn(anchorEntity, ancestorXpaths);
 310         }
 311         fragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(fetchDescendantsOption,
 312                 fragmentEntities);
 313         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 314     }
 315
 316     @Override
 317     @Timed(value = "cps.data.persistence.service.datanode.query.anchors",
 318             description = "Time taken to query data nodes across all anchors or list of anchors")
 319     public List<DataNode> queryDataNodesAcrossAnchors(final String dataspaceName, final String cpsPath,
 320                                                       final FetchDescendantsOption fetchDescendantsOption,
 321                                                       final PaginationOption paginationOption) {
 322         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 323         final CpsPathQuery cpsPathQuery;
 324         try {
 325             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 326         } catch (final PathParsingException e) {
 327             throw new CpsPathException(e.getMessage());
 328         }
 329
 330         final List<Long> anchorIds;
 331         if (paginationOption == NO_PAGINATION) {
 332             anchorIds = Collections.emptyList();
 333         } else {
 334             anchorIds = getAnchorIdsForPagination(dataspaceEntity, cpsPathQuery, paginationOption);
 335             if (anchorIds.isEmpty()) {
 336                 return Collections.emptyList();
 337             }
 338         }
 339         Collection<FragmentEntity> fragmentEntities =
 340             fragmentRepository.findByDataspaceAndCpsPath(dataspaceEntity, cpsPathQuery, anchorIds);
 341
 342         if (cpsPathQuery.hasAncestorAxis()) {
 343             final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 344             if (anchorIds.isEmpty()) {
 345                 fragmentEntities = fragmentRepository.findByDataspaceAndXpathIn(dataspaceEntity, ancestorXpaths);
 346             } else {
 347                 fragmentEntities = fragmentRepository.findByAnchorIdsAndXpathIn(
 348                         anchorIds.toArray(new Long[0]), ancestorXpaths.toArray(new String[0]));
 349             }
 350
 351         }
 352         fragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(fetchDescendantsOption,
 353                 fragmentEntities);
 354         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 355     }
 356
 357     private List<Long> getAnchorIdsForPagination(final DataspaceEntity dataspaceEntity, final CpsPathQuery cpsPathQuery,
 358                                                  final PaginationOption paginationOption) {
 359         return fragmentRepository.findAnchorIdsForPagination(dataspaceEntity, cpsPathQuery, paginationOption);
 360     }
 361
 362     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 363                                                                final Collection<FragmentEntity> fragmentEntities) {
 364         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 365         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 366             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 367         }
 368         return Collections.unmodifiableList(dataNodes);
 369     }
 370
 371     private static String getNormalizedXpath(final String xpathSource) {
 372         if (isRootXpath(xpathSource)) {
 373             return xpathSource;
 374         }
 375         try {
 376             return CpsPathUtil.getNormalizedXpath(xpathSource);
 377         } catch (final PathParsingException pathParsingException) {
 378             throw new CpsPathException(pathParsingException.getMessage());
 379         }
 380     }
 381
 382     private static Collection<String> getNormalizedXpaths(final Collection<String> xpaths) {
 383         final Collection<String> normalizedXpaths = new HashSet<>(xpaths.size());
 384         for (final String xpath : xpaths) {
 385             try {
 386                 normalizedXpaths.add(getNormalizedXpath(xpath));
 387             } catch (final CpsPathException cpsPathException) {
 388                 log.warn("Error parsing xpath \"{}\": {}", xpath, cpsPathException.getMessage());
 389             }
 390         }
 391         return normalizedXpaths;
 392     }
 393
 394     @Override
 395     public String startSession() {
 396         return sessionManager.startSession();
 397     }
 398
 399     @Override
 400     public void closeSession(final String sessionId) {
 401         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 402     }
 403
 404     @Override
 405     public void lockAnchor(final String sessionId, final String dataspaceName,
 406                            final String anchorName, final Long timeoutInMilliseconds) {
 407         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 408     }
 409
 410     @Override
 411     public Integer countAnchorsForDataspaceAndCpsPath(final String dataspaceName, final String cpsPath) {
 412         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 413         final CpsPathQuery cpsPathQuery;
 414         try {
 415             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 416         } catch (final PathParsingException e) {
 417             throw new CpsPathException(e.getMessage());
 418         }
 419         final List<Long> anchorIdList = getAnchorIdsForPagination(dataspaceEntity, cpsPathQuery, NO_PAGINATION);
 420         return anchorIdList.size();
 421     }
 422
 423     private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
 424                                                     final CpsPathQuery cpsPathQuery) {
 425         final Set<String> ancestorXpath = new HashSet<>();
 426         final Pattern pattern =
 427                 Pattern.compile("(.*/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 428                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "/.*");
 429         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 430             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 431             if (matcher.matches()) {
 432                 ancestorXpath.add(matcher.group(1));
 433             }
 434         }
 435         return ancestorXpath;
 436     }
 437
 438     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 439                                 final FetchDescendantsOption fetchDescendantsOption) {
 440         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 441         Map<String, Serializable> leaves = new HashMap<>();
 442         if (fragmentEntity.getAttributes() != null) {
 443             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 444         }
 445         return new DataNodeBuilder()
 446                 .withXpath(fragmentEntity.getXpath())
 447                 .withLeaves(leaves)
 448                 .withDataspace(fragmentEntity.getAnchor().getDataspace().getName())
 449                 .withAnchor(fragmentEntity.getAnchor().getName())
 450                 .withChildDataNodes(childDataNodes).build();
 451     }
 452
 453     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
 454                                              final FetchDescendantsOption fetchDescendantsOption) {
 455         if (fetchDescendantsOption.hasNext()) {
 456             return fragmentEntity.getChildFragments().stream()
 457                     .map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
 458                     .collect(Collectors.toList());
 459         }
 460         return Collections.emptyList();
 461     }
 462
 463     @Override
 464     public void batchUpdateDataLeaves(final String dataspaceName, final String anchorName,
 465                                         final Map<String, Map<String, Serializable>> updatedLeavesPerXPath) {
 466         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 467
 468         final Collection<String> xpathsOfUpdatedLeaves = updatedLeavesPerXPath.keySet();
 469         final Collection<FragmentEntity> fragmentEntities = getFragmentEntities(anchorEntity, xpathsOfUpdatedLeaves);
 470
 471         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 472             final Map<String, Serializable> updatedLeaves = updatedLeavesPerXPath.get(fragmentEntity.getXpath());
 473             final String mergedLeaves = mergeLeaves(updatedLeaves, fragmentEntity.getAttributes());
 474             fragmentEntity.setAttributes(mergedLeaves);
 475         }
 476
 477         try {
 478             fragmentRepository.saveAll(fragmentEntities);
 479         } catch (final StaleStateException staleStateException) {
 480             retryUpdateDataNodesIndividually(anchorEntity, fragmentEntities);
 481         }
 482     }
 483
 484     @Override
 485     public void updateDataNodesAndDescendants(final String dataspaceName, final String anchorName,
 486                                               final Collection<DataNode> updatedDataNodes) {
 487         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 488
 489         final Map<String, DataNode> xpathToUpdatedDataNode = updatedDataNodes.stream()
 490             .collect(Collectors.toMap(DataNode::getXpath, dataNode -> dataNode));
 491
 492         final Collection<String> xpaths = xpathToUpdatedDataNode.keySet();
 493         Collection<FragmentEntity> existingFragmentEntities = getFragmentEntities(anchorEntity, xpaths);
 494         existingFragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(
 495                 FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS, existingFragmentEntities);
 496
 497         for (final FragmentEntity existingFragmentEntity : existingFragmentEntities) {
 498             final DataNode updatedDataNode = xpathToUpdatedDataNode.get(existingFragmentEntity.getXpath());
 499             updateFragmentEntityAndDescendantsWithDataNode(existingFragmentEntity, updatedDataNode);
 500         }
 501
 502         try {
 503             fragmentRepository.saveAll(existingFragmentEntities);
 504         } catch (final StaleStateException staleStateException) {
 505             retryUpdateDataNodesIndividually(anchorEntity, existingFragmentEntities);
 506         }
 507     }
 508
 509     private void retryUpdateDataNodesIndividually(final AnchorEntity anchorEntity,
 510                                                   final Collection<FragmentEntity> fragmentEntities) {
 511         final Collection<String> failedXpaths = new HashSet<>();
 512         for (final FragmentEntity dataNodeFragment : fragmentEntities) {
 513             try {
 514                 fragmentRepository.save(dataNodeFragment);
 515             } catch (final StaleStateException staleStateException) {
 516                 failedXpaths.add(dataNodeFragment.getXpath());
 517             }
 518         }
 519         if (!failedXpaths.isEmpty()) {
 520             final String failedXpathsConcatenated = String.join(",", failedXpaths);
 521             throw new ConcurrencyException("Concurrent Transactions", String.format(
 522                     "DataNodes : %s in Dataspace :'%s' with Anchor : '%s'  are updated by another transaction.",
 523                     failedXpathsConcatenated, anchorEntity.getDataspace().getName(), anchorEntity.getName()));
 524         }
 525     }
 526
 527     private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
 528                                                                 final DataNode newDataNode) {
 529         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 530
 531         final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
 532                 .collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
 533
 534         final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
 535         for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
 536             final FragmentEntity childFragment;
 537             if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
 538                 childFragment = convertToFragmentWithAllDescendants(existingFragmentEntity.getAnchor(),
 539                     newDataNodeChild);
 540             } else {
 541                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
 542                 updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
 543             }
 544             updatedChildFragments.add(childFragment);
 545         }
 546
 547         existingFragmentEntity.getChildFragments().clear();
 548         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
 549     }
 550
 551     @Override
 552     @Transactional
 553     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 554                                    final Collection<DataNode> newListElements) {
 555         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 556         final FragmentEntity parentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 557         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
 558         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
 559                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
 560         parentEntity.getChildFragments().removeAll(existingListElementFragmentEntitiesByXPath.values());
 561         final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
 562         for (final DataNode newListElement : newListElements) {
 563             final FragmentEntity existingListElementEntity =
 564                     existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
 565             final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
 566                     existingListElementEntity);
 567             updatedChildFragmentEntities.add(entityToBeAdded);
 568         }
 569         parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
 570         fragmentRepository.save(parentEntity);
 571     }
 572
 573     @Override
 574     @Transactional
 575     public void deleteDataNodes(final String dataspaceName, final String anchorName) {
 576         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 577         anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
 578             .ifPresent(anchorEntity -> fragmentRepository.deleteByAnchorIn(Collections.singletonList(anchorEntity)));
 579     }
 580
 581     @Override
 582     @Transactional
 583     public void deleteDataNodes(final String dataspaceName, final Collection<String> anchorNames) {
 584         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 585         final Collection<AnchorEntity> anchorEntities =
 586             anchorRepository.findAllByDataspaceAndNameIn(dataspaceEntity, anchorNames);
 587         fragmentRepository.deleteByAnchorIn(anchorEntities);
 588     }
 589
 590     @Override
 591     @Transactional
 592     public void deleteDataNodes(final String dataspaceName, final String anchorName,
 593                                 final Collection<String> xpathsToDelete) {
 594         deleteDataNodes(dataspaceName, anchorName, xpathsToDelete, false);
 595     }
 596
 597     private void deleteDataNodes(final String dataspaceName, final String anchorName,
 598                                  final Collection<String> xpathsToDelete, final boolean onlySupportListDeletion) {
 599         final boolean haveRootXpath = xpathsToDelete.stream().anyMatch(CpsDataPersistenceServiceImpl::isRootXpath);
 600         if (haveRootXpath) {
 601             deleteDataNodes(dataspaceName, anchorName);
 602             return;
 603         }
 604
 605         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 606
 607         final Collection<String> deleteChecklist = getNormalizedXpaths(xpathsToDelete);
 608         final Collection<String> xpathsToExistingContainers =
 609             fragmentRepository.findAllXpathByAnchorAndXpathIn(anchorEntity, deleteChecklist);
 610         if (onlySupportListDeletion) {
 611             final Collection<String> xpathsToExistingListElements = xpathsToExistingContainers.stream()
 612                 .filter(CpsPathUtil::isPathToListElement).collect(Collectors.toList());
 613             deleteChecklist.removeAll(xpathsToExistingListElements);
 614         } else {
 615             deleteChecklist.removeAll(xpathsToExistingContainers);
 616         }
 617
 618         final Collection<String> xpathsToExistingLists = deleteChecklist.stream()
 619             .filter(xpath -> fragmentRepository.existsByAnchorAndXpathStartsWith(anchorEntity, xpath + "["))
 620             .collect(Collectors.toList());
 621         deleteChecklist.removeAll(xpathsToExistingLists);
 622
 623         if (!deleteChecklist.isEmpty()) {
 624             throw new DataNodeNotFoundExceptionBatch(dataspaceName, anchorName, deleteChecklist);
 625         }
 626
 627         fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingContainers);
 628         fragmentRepository.deleteListsByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingLists);
 629     }
 630
 631     @Override
 632     @Transactional
 633     public void deleteListDataNode(final String dataspaceName, final String anchorName,
 634                                    final String targetXpath) {
 635         deleteDataNode(dataspaceName, anchorName, targetXpath, true);
 636     }
 637
 638     @Override
 639     @Transactional
 640     public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
 641         deleteDataNode(dataspaceName, anchorName, targetXpath, false);
 642     }
 643
 644     private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
 645                                 final boolean onlySupportListNodeDeletion) {
 646         final String normalizedXpath = getNormalizedXpath(targetXpath);
 647         try {
 648             deleteDataNodes(dataspaceName, anchorName, Collections.singletonList(normalizedXpath),
 649                 onlySupportListNodeDeletion);
 650         } catch (final DataNodeNotFoundExceptionBatch dataNodeNotFoundExceptionBatch) {
 651             throw new DataNodeNotFoundException(dataspaceName, anchorName, targetXpath);
 652         }
 653     }
 654
 655     private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
 656         if (newListElements.isEmpty()) {
 657             throw new CpsAdminException("Invalid list replacement",
 658                     "Cannot replace list elements with empty collection");
 659         }
 660         final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
 661         return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
 662     }
 663
 664     private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
 665                                                      final DataNode newListElement,
 666                                                      final FragmentEntity existingListElementEntity) {
 667         if (existingListElementEntity == null) {
 668             return convertToFragmentWithAllDescendants(parentEntity.getAnchor(), newListElement);
 669         }
 670         if (newListElement.getChildDataNodes().isEmpty()) {
 671             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
 672             existingListElementEntity.getChildFragments().clear();
 673         } else {
 674             updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
 675         }
 676         return existingListElementEntity;
 677     }
 678
 679     private static boolean isNewDataNode(final DataNode replacementDataNode,
 680                                          final Map<String, FragmentEntity> existingListElementsByXpath) {
 681         return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
 682     }
 683
 684     private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
 685                                                   final DataNode newListElement) {
 686         final FragmentEntity replacementFragmentEntity =
 687                 FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
 688                         newListElement.getLeaves())).build();
 689         existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
 690     }
 691
 692     private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
 693             final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
 694         return childEntities.stream()
 695                 .filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
 696                 .collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
 697     }
 698
 699     private static boolean isRootXpath(final String xpath) {
 700         return "/".equals(xpath) || "".equals(xpath);
 701     }
 702
 703     private String mergeLeaves(final Map<String, Serializable> updateLeaves, final String currentLeavesAsString) {
 704         Map<String, Serializable> currentLeavesAsMap = new HashMap<>();
 705         if (currentLeavesAsString != null) {
 706             currentLeavesAsMap = jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
 707             currentLeavesAsMap.putAll(updateLeaves);
 708         }
 709
 710         if (currentLeavesAsMap.isEmpty()) {
 711             return "";
 712         }
 713         return jsonObjectMapper.asJsonString(currentLeavesAsMap);
 714     }
 715
 716     private AnchorEntity getAnchorEntity(final String dataspaceName, final String anchorName) {
 717         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 718         return anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 719     }
 720 }