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 e) {
 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 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 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 e) {
 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> 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 = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 292         final CpsPathQuery cpsPathQuery;
 293         try {
 294             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 295         } catch (final PathParsingException e) {
 296             throw new CpsPathException(e.getMessage());
 297         }
 298
 299         Collection<FragmentEntity> fragmentEntities;
 300         fragmentEntities = fragmentRepository.findByAnchorAndCpsPath(anchorEntity, cpsPathQuery);
 301         if (cpsPathQuery.hasAncestorAxis()) {
 302             final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 303             fragmentEntities = fragmentRepository.findByAnchorAndXpathIn(anchorEntity, ancestorXpaths);
 304         }
 305         fragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(fetchDescendantsOption,
 306                 fragmentEntities);
 307         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 308     }
 309
 310     @Override
 311     @Timed(value = "cps.data.persistence.service.datanode.query.anchors",
 312             description = "Time taken to query data nodes across all anchors or list of anchors")
 313     public List<DataNode> queryDataNodesAcrossAnchors(final String dataspaceName, final String cpsPath,
 314                                                       final FetchDescendantsOption fetchDescendantsOption,
 315                                                       final PaginationOption paginationOption) {
 316         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 317         final CpsPathQuery cpsPathQuery;
 318         try {
 319             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 320         } catch (final PathParsingException e) {
 321             throw new CpsPathException(e.getMessage());
 322         }
 323
 324         final List<Long> anchorIds;
 325         if (paginationOption == NO_PAGINATION) {
 326             anchorIds = Collections.EMPTY_LIST;
 327         } else {
 328             anchorIds = getAnchorIdsForPagination(dataspaceEntity, cpsPathQuery, paginationOption);
 329             if (anchorIds.isEmpty()) {
 330                 return Collections.emptyList();
 331             }
 332         }
 333         Collection<FragmentEntity> fragmentEntities =
 334             fragmentRepository.findByDataspaceAndCpsPath(dataspaceEntity, cpsPathQuery, anchorIds);
 335
 336         if (cpsPathQuery.hasAncestorAxis()) {
 337             final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 338             if (anchorIds.isEmpty()) {
 339                 fragmentEntities = fragmentRepository.findByDataspaceAndXpathIn(dataspaceEntity, ancestorXpaths);
 340             } else {
 341                 fragmentEntities = fragmentRepository.findByAnchorIdsAndXpathIn(
 342                         anchorIds.toArray(new Long[0]), ancestorXpaths.toArray(new String[0]));
 343             }
 344
 345         }
 346         fragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(fetchDescendantsOption,
 347                 fragmentEntities);
 348         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 349     }
 350
 351     private List<Long> getAnchorIdsForPagination(final DataspaceEntity dataspaceEntity, final CpsPathQuery cpsPathQuery,
 352                                                  final PaginationOption paginationOption) {
 353         return fragmentRepository.findAnchorIdsForPagination(dataspaceEntity, cpsPathQuery, paginationOption);
 354     }
 355
 356     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 357                                                                final Collection<FragmentEntity> fragmentEntities) {
 358         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 359         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 360             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 361         }
 362         return Collections.unmodifiableList(dataNodes);
 363     }
 364
 365     private static String getNormalizedXpath(final String xpathSource) {
 366         if (isRootXpath(xpathSource)) {
 367             return xpathSource;
 368         }
 369         try {
 370             return CpsPathUtil.getNormalizedXpath(xpathSource);
 371         } catch (final PathParsingException e) {
 372             throw new CpsPathException(e.getMessage());
 373         }
 374     }
 375
 376     @Override
 377     public String startSession() {
 378         return sessionManager.startSession();
 379     }
 380
 381     @Override
 382     public void closeSession(final String sessionId) {
 383         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 384     }
 385
 386     @Override
 387     public void lockAnchor(final String sessionId, final String dataspaceName,
 388                            final String anchorName, final Long timeoutInMilliseconds) {
 389         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 390     }
 391
 392     @Override
 393     public Integer countAnchorsForDataspaceAndCpsPath(final String dataspaceName, final String cpsPath) {
 394         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 395         final CpsPathQuery cpsPathQuery;
 396         try {
 397             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 398         } catch (final PathParsingException e) {
 399             throw new CpsPathException(e.getMessage());
 400         }
 401         final List<Long> anchorIdList = getAnchorIdsForPagination(dataspaceEntity, cpsPathQuery, NO_PAGINATION);
 402         return anchorIdList.size();
 403     }
 404
 405     private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
 406                                                     final CpsPathQuery cpsPathQuery) {
 407         final Set<String> ancestorXpath = new HashSet<>();
 408         final Pattern pattern =
 409                 Pattern.compile("(.*/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 410                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "/.*");
 411         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 412             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 413             if (matcher.matches()) {
 414                 ancestorXpath.add(matcher.group(1));
 415             }
 416         }
 417         return ancestorXpath;
 418     }
 419
 420     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 421                                 final FetchDescendantsOption fetchDescendantsOption) {
 422         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 423         Map<String, Serializable> leaves = new HashMap<>();
 424         if (fragmentEntity.getAttributes() != null) {
 425             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 426         }
 427         return new DataNodeBuilder()
 428                 .withXpath(fragmentEntity.getXpath())
 429                 .withLeaves(leaves)
 430                 .withDataspace(fragmentEntity.getAnchor().getDataspace().getName())
 431                 .withAnchor(fragmentEntity.getAnchor().getName())
 432                 .withChildDataNodes(childDataNodes).build();
 433     }
 434
 435     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
 436                                              final FetchDescendantsOption fetchDescendantsOption) {
 437         if (fetchDescendantsOption.hasNext()) {
 438             return fragmentEntity.getChildFragments().stream()
 439                     .map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
 440                     .collect(Collectors.toList());
 441         }
 442         return Collections.emptyList();
 443     }
 444
 445     @Override
 446     public void batchUpdateDataLeaves(final String dataspaceName, final String anchorName,
 447                                         final Map<String, Map<String, Serializable>> updatedLeavesPerXPath) {
 448         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 449
 450         final Collection<String> xpathsOfUpdatedLeaves = updatedLeavesPerXPath.keySet();
 451         final Collection<FragmentEntity> fragmentEntities = getFragmentEntities(anchorEntity, xpathsOfUpdatedLeaves);
 452
 453         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 454             final Map<String, Serializable> updatedLeaves = updatedLeavesPerXPath.get(fragmentEntity.getXpath());
 455             final String mergedLeaves = mergeLeaves(updatedLeaves, fragmentEntity.getAttributes());
 456             fragmentEntity.setAttributes(mergedLeaves);
 457         }
 458
 459         try {
 460             fragmentRepository.saveAll(fragmentEntities);
 461         } catch (final StaleStateException staleStateException) {
 462             retryUpdateDataNodesIndividually(anchorEntity, fragmentEntities);
 463         }
 464     }
 465
 466     @Override
 467     public void updateDataNodesAndDescendants(final String dataspaceName, final String anchorName,
 468                                               final Collection<DataNode> updatedDataNodes) {
 469         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 470
 471         final Map<String, DataNode> xpathToUpdatedDataNode = updatedDataNodes.stream()
 472             .collect(Collectors.toMap(DataNode::getXpath, dataNode -> dataNode));
 473
 474         final Collection<String> xpaths = xpathToUpdatedDataNode.keySet();
 475         Collection<FragmentEntity> existingFragmentEntities = getFragmentEntities(anchorEntity, xpaths);
 476         existingFragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(
 477                 FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS, existingFragmentEntities);
 478
 479         for (final FragmentEntity existingFragmentEntity : existingFragmentEntities) {
 480             final DataNode updatedDataNode = xpathToUpdatedDataNode.get(existingFragmentEntity.getXpath());
 481             updateFragmentEntityAndDescendantsWithDataNode(existingFragmentEntity, updatedDataNode);
 482         }
 483
 484         try {
 485             fragmentRepository.saveAll(existingFragmentEntities);
 486         } catch (final StaleStateException staleStateException) {
 487             retryUpdateDataNodesIndividually(anchorEntity, existingFragmentEntities);
 488         }
 489     }
 490
 491     private void retryUpdateDataNodesIndividually(final AnchorEntity anchorEntity,
 492                                                   final Collection<FragmentEntity> fragmentEntities) {
 493         final Collection<String> failedXpaths = new HashSet<>();
 494         for (final FragmentEntity dataNodeFragment : fragmentEntities) {
 495             try {
 496                 fragmentRepository.save(dataNodeFragment);
 497             } catch (final StaleStateException e) {
 498                 failedXpaths.add(dataNodeFragment.getXpath());
 499             }
 500         }
 501         if (!failedXpaths.isEmpty()) {
 502             final String failedXpathsConcatenated = String.join(",", failedXpaths);
 503             throw new ConcurrencyException("Concurrent Transactions", String.format(
 504                     "DataNodes : %s in Dataspace :'%s' with Anchor : '%s'  are updated by another transaction.",
 505                     failedXpathsConcatenated, anchorEntity.getDataspace().getName(), anchorEntity.getName()));
 506         }
 507     }
 508
 509     private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
 510                                                                 final DataNode newDataNode) {
 511         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 512
 513         final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
 514                 .collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
 515
 516         final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
 517         for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
 518             final FragmentEntity childFragment;
 519             if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
 520                 childFragment = convertToFragmentWithAllDescendants(existingFragmentEntity.getAnchor(),
 521                     newDataNodeChild);
 522             } else {
 523                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
 524                 updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
 525             }
 526             updatedChildFragments.add(childFragment);
 527         }
 528
 529         existingFragmentEntity.getChildFragments().clear();
 530         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
 531     }
 532
 533     @Override
 534     @Transactional
 535     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 536                                    final Collection<DataNode> newListElements) {
 537         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 538         final FragmentEntity parentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 539         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
 540         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
 541                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
 542         parentEntity.getChildFragments().removeAll(existingListElementFragmentEntitiesByXPath.values());
 543         final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
 544         for (final DataNode newListElement : newListElements) {
 545             final FragmentEntity existingListElementEntity =
 546                     existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
 547             final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
 548                     existingListElementEntity);
 549             updatedChildFragmentEntities.add(entityToBeAdded);
 550         }
 551         parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
 552         fragmentRepository.save(parentEntity);
 553     }
 554
 555     @Override
 556     @Transactional
 557     public void deleteDataNodes(final String dataspaceName, final String anchorName) {
 558         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 559         anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
 560             .ifPresent(anchorEntity -> fragmentRepository.deleteByAnchorIn(Collections.singletonList(anchorEntity)));
 561     }
 562
 563     @Override
 564     @Transactional
 565     public void deleteDataNodes(final String dataspaceName, final Collection<String> anchorNames) {
 566         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 567         final Collection<AnchorEntity> anchorEntities =
 568             anchorRepository.findAllByDataspaceAndNameIn(dataspaceEntity, anchorNames);
 569         fragmentRepository.deleteByAnchorIn(anchorEntities);
 570     }
 571
 572     @Override
 573     @Transactional
 574     public void deleteDataNodes(final String dataspaceName, final String anchorName,
 575                                 final Collection<String> xpathsToDelete) {
 576         deleteDataNodes(dataspaceName, anchorName, xpathsToDelete, false);
 577     }
 578
 579     private void deleteDataNodes(final String dataspaceName, final String anchorName,
 580                                  final Collection<String> xpathsToDelete, final boolean onlySupportListDeletion) {
 581         final boolean haveRootXpath = xpathsToDelete.stream().anyMatch(CpsDataPersistenceServiceImpl::isRootXpath);
 582         if (haveRootXpath) {
 583             deleteDataNodes(dataspaceName, anchorName);
 584             return;
 585         }
 586
 587         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 588
 589         final Collection<String> deleteChecklist = new HashSet<>(xpathsToDelete.size());
 590         for (final String xpath : xpathsToDelete) {
 591             try {
 592                 deleteChecklist.add(CpsPathUtil.getNormalizedXpath(xpath));
 593             } catch (final PathParsingException e) {
 594                 log.warn("Error parsing xpath \"{}\": {}", xpath, e.getMessage());
 595             }
 596         }
 597
 598         final Collection<String> xpathsToExistingContainers =
 599             fragmentRepository.findAllXpathByAnchorAndXpathIn(anchorEntity, deleteChecklist);
 600         if (onlySupportListDeletion) {
 601             final Collection<String> xpathsToExistingListElements = xpathsToExistingContainers.stream()
 602                 .filter(CpsPathUtil::isPathToListElement).collect(Collectors.toList());
 603             deleteChecklist.removeAll(xpathsToExistingListElements);
 604         } else {
 605             deleteChecklist.removeAll(xpathsToExistingContainers);
 606         }
 607
 608         final Collection<String> xpathsToExistingLists = deleteChecklist.stream()
 609             .filter(xpath -> fragmentRepository.existsByAnchorAndXpathStartsWith(anchorEntity, xpath + "["))
 610             .collect(Collectors.toList());
 611         deleteChecklist.removeAll(xpathsToExistingLists);
 612
 613         if (!deleteChecklist.isEmpty()) {
 614             throw new DataNodeNotFoundExceptionBatch(dataspaceName, anchorName, deleteChecklist);
 615         }
 616
 617         fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingContainers);
 618         fragmentRepository.deleteListsByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingLists);
 619     }
 620
 621     @Override
 622     @Transactional
 623     public void deleteListDataNode(final String dataspaceName, final String anchorName,
 624                                    final String targetXpath) {
 625         deleteDataNode(dataspaceName, anchorName, targetXpath, true);
 626     }
 627
 628     @Override
 629     @Transactional
 630     public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
 631         deleteDataNode(dataspaceName, anchorName, targetXpath, false);
 632     }
 633
 634     private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
 635                                 final boolean onlySupportListNodeDeletion) {
 636         final String normalizedXpath = getNormalizedXpath(targetXpath);
 637         try {
 638             deleteDataNodes(dataspaceName, anchorName, Collections.singletonList(normalizedXpath),
 639                 onlySupportListNodeDeletion);
 640         } catch (final DataNodeNotFoundExceptionBatch dataNodeNotFoundExceptionBatch) {
 641             throw new DataNodeNotFoundException(dataspaceName, anchorName, targetXpath);
 642         }
 643     }
 644
 645     private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
 646         if (newListElements.isEmpty()) {
 647             throw new CpsAdminException("Invalid list replacement",
 648                     "Cannot replace list elements with empty collection");
 649         }
 650         final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
 651         return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
 652     }
 653
 654     private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
 655                                                      final DataNode newListElement,
 656                                                      final FragmentEntity existingListElementEntity) {
 657         if (existingListElementEntity == null) {
 658             return convertToFragmentWithAllDescendants(parentEntity.getAnchor(), newListElement);
 659         }
 660         if (newListElement.getChildDataNodes().isEmpty()) {
 661             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
 662             existingListElementEntity.getChildFragments().clear();
 663         } else {
 664             updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
 665         }
 666         return existingListElementEntity;
 667     }
 668
 669     private static boolean isNewDataNode(final DataNode replacementDataNode,
 670                                          final Map<String, FragmentEntity> existingListElementsByXpath) {
 671         return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
 672     }
 673
 674     private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
 675                                                   final DataNode newListElement) {
 676         final FragmentEntity replacementFragmentEntity =
 677                 FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
 678                         newListElement.getLeaves())).build();
 679         existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
 680     }
 681
 682     private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
 683             final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
 684         return childEntities.stream()
 685                 .filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
 686                 .collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
 687     }
 688
 689     private static boolean isRootXpath(final String xpath) {
 690         return "/".equals(xpath) || "".equals(xpath);
 691     }
 692
 693     private String mergeLeaves(final Map<String, Serializable> updateLeaves, final String currentLeavesAsString) {
 694         Map<String, Serializable> currentLeavesAsMap = new HashMap<>();
 695         if (currentLeavesAsString != null) {
 696             currentLeavesAsMap = jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
 697             currentLeavesAsMap.putAll(updateLeaves);
 698         }
 699
 700         if (currentLeavesAsMap.isEmpty()) {
 701             return "";
 702         }
 703         return jsonObjectMapper.asJsonString(currentLeavesAsMap);
 704     }
 705
 706     private AnchorEntity getAnchorEntity(final String dataspaceName, final String anchorName) {
 707         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 708         return anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 709     }
 710 }