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 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.collect.ImmutableSet;
  27 import com.google.common.collect.ImmutableSet.Builder;
  28 import java.io.Serializable;
  29 import java.util.ArrayList;
  30 import java.util.Collection;
  31 import java.util.Collections;
  32 import java.util.HashMap;
  33 import java.util.HashSet;
  34 import java.util.List;
  35 import java.util.Map;
  36 import java.util.Set;
  37 import java.util.regex.Matcher;
  38 import java.util.regex.Pattern;
  39 import java.util.stream.Collectors;
  40 import javax.transaction.Transactional;
  41 import lombok.RequiredArgsConstructor;
  42 import lombok.extern.slf4j.Slf4j;
  43 import org.hibernate.StaleStateException;
  44 import org.onap.cps.cpspath.parser.CpsPathQuery;
  45 import org.onap.cps.cpspath.parser.CpsPathUtil;
  46 import org.onap.cps.cpspath.parser.PathParsingException;
  47 import org.onap.cps.spi.CpsDataPersistenceService;
  48 import org.onap.cps.spi.FetchDescendantsOption;
  49 import org.onap.cps.spi.entities.AnchorEntity;
  50 import org.onap.cps.spi.entities.DataspaceEntity;
  51 import org.onap.cps.spi.entities.FragmentEntity;
  52 import org.onap.cps.spi.entities.FragmentEntityArranger;
  53 import org.onap.cps.spi.entities.FragmentExtract;
  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.model.DataNode;
  61 import org.onap.cps.spi.model.DataNodeBuilder;
  62 import org.onap.cps.spi.repository.AnchorRepository;
  63 import org.onap.cps.spi.repository.DataspaceRepository;
  64 import org.onap.cps.spi.repository.FragmentNativeRepository;
  65 import org.onap.cps.spi.repository.FragmentQueryBuilder;
  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     private final FragmentNativeRepository fragmentNativeRepositoryImpl;
  83
  84     private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@[\\s\\S]+?]){0,1})";
  85
  86     @Override
  87     public void addChildDataNode(final String dataspaceName, final String anchorName, final String parentNodeXpath,
  88                                  final DataNode newChildDataNode) {
  89         addNewChildDataNode(dataspaceName, anchorName, parentNodeXpath, newChildDataNode);
  90     }
  91
  92     @Override
  93     public void addChildDataNodes(final String dataspaceName, final String anchorName,
  94                                   final String parentNodeXpath, final Collection<DataNode> dataNodes) {
  95         addChildrenDataNodes(dataspaceName, anchorName, parentNodeXpath, dataNodes);
  96     }
  97
  98     @Override
  99     public void addListElements(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 100                                 final Collection<DataNode> newListElements) {
 101         addChildrenDataNodes(dataspaceName, anchorName, parentNodeXpath, newListElements);
 102     }
 103
 104     @Override
 105     public void addMultipleLists(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 106                                  final Collection<Collection<DataNode>> newLists) {
 107         final Collection<String> failedXpaths = new HashSet<>();
 108         newLists.forEach(newList -> {
 109             try {
 110                 addChildrenDataNodes(dataspaceName, anchorName, parentNodeXpath, newList);
 111             } catch (final AlreadyDefinedExceptionBatch e) {
 112                 failedXpaths.addAll(e.getAlreadyDefinedXpaths());
 113             }
 114         });
 115
 116         if (!failedXpaths.isEmpty()) {
 117             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 118         }
 119
 120     }
 121
 122     private void addNewChildDataNode(final String dataspaceName, final String anchorName,
 123                                      final String parentNodeXpath, final DataNode newChild) {
 124         final FragmentEntity parentFragmentEntity =
 125             getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
 126         final FragmentEntity newChildAsFragmentEntity =
 127                 convertToFragmentWithAllDescendants(parentFragmentEntity.getDataspace(),
 128                         parentFragmentEntity.getAnchor(), newChild);
 129         newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 130         try {
 131             fragmentRepository.save(newChildAsFragmentEntity);
 132         } catch (final DataIntegrityViolationException e) {
 133             throw AlreadyDefinedException.forDataNode(newChild.getXpath(), anchorName, e);
 134         }
 135
 136     }
 137
 138     private void addChildrenDataNodes(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 139                                       final Collection<DataNode> newChildren) {
 140         final FragmentEntity parentFragmentEntity =
 141             getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
 142         final List<FragmentEntity> fragmentEntities = new ArrayList<>(newChildren.size());
 143         try {
 144             newChildren.forEach(newChildAsDataNode -> {
 145                 final FragmentEntity newChildAsFragmentEntity =
 146                         convertToFragmentWithAllDescendants(parentFragmentEntity.getDataspace(),
 147                                 parentFragmentEntity.getAnchor(), newChildAsDataNode);
 148                 newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 149                 fragmentEntities.add(newChildAsFragmentEntity);
 150             });
 151             fragmentRepository.saveAll(fragmentEntities);
 152         } catch (final DataIntegrityViolationException e) {
 153             log.warn("Exception occurred : {} , While saving : {} children, retrying using individual save operations",
 154                     e, fragmentEntities.size());
 155             retrySavingEachChildIndividually(dataspaceName, anchorName, parentNodeXpath, newChildren);
 156         }
 157     }
 158
 159     private void retrySavingEachChildIndividually(final String dataspaceName, final String anchorName,
 160                                                   final String parentNodeXpath,
 161                                                   final Collection<DataNode> newChildren) {
 162         final Collection<String> failedXpaths = new HashSet<>();
 163         for (final DataNode newChild : newChildren) {
 164             try {
 165                 addNewChildDataNode(dataspaceName, anchorName, parentNodeXpath, newChild);
 166             } catch (final AlreadyDefinedException e) {
 167                 failedXpaths.add(newChild.getXpath());
 168             }
 169         }
 170         if (!failedXpaths.isEmpty()) {
 171             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 172         }
 173     }
 174
 175     @Override
 176     public void storeDataNode(final String dataspaceName, final String anchorName, final DataNode dataNode) {
 177         storeDataNodes(dataspaceName, anchorName, Collections.singletonList(dataNode));
 178     }
 179
 180     @Override
 181     public void storeDataNodes(final String dataspaceName, final String anchorName,
 182                                final Collection<DataNode> dataNodes) {
 183         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 184         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 185         final List<FragmentEntity> fragmentEntities = new ArrayList<>(dataNodes.size());
 186         try {
 187             for (final DataNode dataNode: dataNodes) {
 188                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(dataspaceEntity, anchorEntity,
 189                         dataNode);
 190                 fragmentEntities.add(fragmentEntity);
 191             }
 192             fragmentRepository.saveAll(fragmentEntities);
 193         } catch (final DataIntegrityViolationException exception) {
 194             log.warn("Exception occurred : {} , While saving : {} data nodes, Retrying saving data nodes individually",
 195                     exception, dataNodes.size());
 196             storeDataNodesIndividually(dataspaceName, anchorName, dataNodes);
 197         }
 198     }
 199
 200     private void storeDataNodesIndividually(final String dataspaceName, final String anchorName,
 201                                            final Collection<DataNode> dataNodes) {
 202         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 203         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 204         final Collection<String> failedXpaths = new HashSet<>();
 205         for (final DataNode dataNode: dataNodes) {
 206             try {
 207                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(dataspaceEntity, anchorEntity,
 208                         dataNode);
 209                 fragmentRepository.save(fragmentEntity);
 210             } catch (final DataIntegrityViolationException e) {
 211                 failedXpaths.add(dataNode.getXpath());
 212             }
 213         }
 214         if (!failedXpaths.isEmpty()) {
 215             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 216         }
 217     }
 218
 219     /**
 220      * Convert DataNode object into Fragment and places the result in the fragments placeholder. Performs same action
 221      * for all DataNode children recursively.
 222      *
 223      * @param dataspaceEntity       dataspace
 224      * @param anchorEntity          anchorEntity
 225      * @param dataNodeToBeConverted dataNode
 226      * @return a Fragment built from current DataNode
 227      */
 228     private FragmentEntity convertToFragmentWithAllDescendants(final DataspaceEntity dataspaceEntity,
 229                                                                final AnchorEntity anchorEntity,
 230                                                                final DataNode dataNodeToBeConverted) {
 231         final FragmentEntity parentFragment = toFragmentEntity(dataspaceEntity, anchorEntity, dataNodeToBeConverted);
 232         final Builder<FragmentEntity> childFragmentsImmutableSetBuilder = ImmutableSet.builder();
 233         for (final DataNode childDataNode : dataNodeToBeConverted.getChildDataNodes()) {
 234             final FragmentEntity childFragment =
 235                     convertToFragmentWithAllDescendants(parentFragment.getDataspace(), parentFragment.getAnchor(),
 236                             childDataNode);
 237             childFragmentsImmutableSetBuilder.add(childFragment);
 238         }
 239         parentFragment.setChildFragments(childFragmentsImmutableSetBuilder.build());
 240         return parentFragment;
 241     }
 242
 243     private FragmentEntity toFragmentEntity(final DataspaceEntity dataspaceEntity,
 244                                             final AnchorEntity anchorEntity, final DataNode dataNode) {
 245         return FragmentEntity.builder()
 246                 .dataspace(dataspaceEntity)
 247                 .anchor(anchorEntity)
 248                 .xpath(dataNode.getXpath())
 249                 .attributes(jsonObjectMapper.asJsonString(dataNode.getLeaves()))
 250                 .build();
 251     }
 252
 253     @Override
 254     public DataNode getDataNode(final String dataspaceName, final String anchorName, final String xpath,
 255                                 final FetchDescendantsOption fetchDescendantsOption) {
 256         final FragmentEntity fragmentEntity = getFragmentByXpath(dataspaceName, anchorName, xpath,
 257             fetchDescendantsOption);
 258         return toDataNode(fragmentEntity, fetchDescendantsOption);
 259     }
 260
 261     @Override
 262     public Collection<DataNode> getDataNodes(final String dataspaceName, final String anchorName,
 263                                              final Collection<String> xpaths,
 264                                              final FetchDescendantsOption fetchDescendantsOption) {
 265         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 266         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 267
 268         final Set<String> normalizedXpaths = new HashSet<>(xpaths.size());
 269         for (final String xpath : xpaths) {
 270             try {
 271                 normalizedXpaths.add(CpsPathUtil.getNormalizedXpath(xpath));
 272             } catch (final PathParsingException e) {
 273                 log.warn("Error parsing xpath \"{}\" in getDataNodes: {}", xpath, e.getMessage());
 274             }
 275         }
 276
 277         final List<FragmentEntity> fragmentEntities =
 278                 fragmentRepository.findByAnchorAndMultipleCpsPaths(anchorEntity.getId(), normalizedXpaths);
 279         return toDataNodes(fragmentEntities, fetchDescendantsOption);
 280     }
 281
 282     private FragmentEntity getFragmentWithoutDescendantsByXpath(final String dataspaceName,
 283                                                                 final String anchorName,
 284                                                                 final String xpath) {
 285         return getFragmentByXpath(dataspaceName, anchorName, xpath, FetchDescendantsOption.OMIT_DESCENDANTS);
 286     }
 287
 288     private FragmentEntity getFragmentByXpath(final String dataspaceName, final String anchorName,
 289                                               final String xpath, final FetchDescendantsOption fetchDescendantsOption) {
 290         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 291         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 292         final FragmentEntity fragmentEntity;
 293         if (isRootXpath(xpath)) {
 294             final List<FragmentExtract> fragmentExtracts = fragmentRepository.getTopLevelFragments(dataspaceEntity,
 295                     anchorEntity);
 296             fragmentEntity = FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts)
 297                 .stream().findFirst().orElse(null);
 298         } else {
 299             final String normalizedXpath = getNormalizedXpath(xpath);
 300             if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
 301                 fragmentEntity =
 302                     fragmentRepository.getByDataspaceAndAnchorAndXpath(dataspaceEntity, anchorEntity, normalizedXpath);
 303             } else {
 304                 fragmentEntity = buildFragmentEntitiesFromFragmentExtracts(anchorEntity, normalizedXpath)
 305                     .stream().findFirst().orElse(null);
 306             }
 307         }
 308         if (fragmentEntity == null) {
 309             throw new DataNodeNotFoundException(dataspaceEntity.getName(), anchorEntity.getName(), xpath);
 310         }
 311         return fragmentEntity;
 312
 313     }
 314
 315     private Collection<FragmentEntity> buildFragmentEntitiesFromFragmentExtracts(final AnchorEntity anchorEntity,
 316                                                                                  final String normalizedXpath) {
 317         final List<FragmentExtract> fragmentExtracts =
 318                 fragmentRepository.findByAnchorIdAndParentXpath(anchorEntity.getId(), normalizedXpath);
 319         log.debug("Fetched {} fragment entities by anchor {} and cps path {}.",
 320                 fragmentExtracts.size(), anchorEntity.getName(), normalizedXpath);
 321         return FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
 322
 323     }
 324
 325     @Override
 326     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
 327                                          final FetchDescendantsOption fetchDescendantsOption) {
 328         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 329         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 330         final CpsPathQuery cpsPathQuery;
 331         try {
 332             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 333         } catch (final PathParsingException e) {
 334             throw new CpsPathException(e.getMessage());
 335         }
 336
 337         Collection<FragmentEntity> fragmentEntities;
 338         if (canUseRegexQuickFind(fetchDescendantsOption, cpsPathQuery)) {
 339             return getDataNodesUsingRegexQuickFind(fetchDescendantsOption, anchorEntity, cpsPathQuery);
 340         }
 341         fragmentEntities = fragmentRepository.findByAnchorAndCpsPath(anchorEntity.getId(), cpsPathQuery);
 342         if (cpsPathQuery.hasAncestorAxis()) {
 343             fragmentEntities = getAncestorFragmentEntities(anchorEntity.getId(), cpsPathQuery, fragmentEntities);
 344         }
 345         return createDataNodesFromProxiedFragmentEntities(fetchDescendantsOption, anchorEntity, fragmentEntities);
 346     }
 347
 348     private static boolean canUseRegexQuickFind(final FetchDescendantsOption fetchDescendantsOption,
 349                                                 final CpsPathQuery cpsPathQuery) {
 350         return fetchDescendantsOption.equals(FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS)
 351             && !cpsPathQuery.hasLeafConditions()
 352             && !cpsPathQuery.hasTextFunctionCondition();
 353     }
 354
 355     private List<DataNode> getDataNodesUsingRegexQuickFind(final FetchDescendantsOption fetchDescendantsOption,
 356                                                            final AnchorEntity anchorEntity,
 357                                                            final CpsPathQuery cpsPathQuery) {
 358         Collection<FragmentEntity> fragmentEntities;
 359         final String xpathRegex = FragmentQueryBuilder.getXpathSqlRegex(cpsPathQuery, true);
 360         final List<FragmentExtract> fragmentExtracts =
 361             fragmentRepository.quickFindWithDescendants(anchorEntity.getId(), xpathRegex);
 362         fragmentEntities = FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
 363         if (cpsPathQuery.hasAncestorAxis()) {
 364             fragmentEntities = getAncestorFragmentEntities(anchorEntity.getId(), cpsPathQuery, fragmentEntities);
 365         }
 366         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 367     }
 368
 369     private Collection<FragmentEntity> getAncestorFragmentEntities(final int anchorId,
 370                                                                    final CpsPathQuery cpsPathQuery,
 371                                                                    final Collection<FragmentEntity> fragmentEntities) {
 372         final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 373         return ancestorXpaths.isEmpty() ? Collections.emptyList()
 374             : fragmentRepository.findByAnchorAndMultipleCpsPaths(anchorId, ancestorXpaths);
 375     }
 376
 377     private List<DataNode> createDataNodesFromProxiedFragmentEntities(
 378                                             final FetchDescendantsOption fetchDescendantsOption,
 379                                             final AnchorEntity anchorEntity,
 380                                             final Collection<FragmentEntity> proxiedFragmentEntities) {
 381         final List<DataNode> dataNodes = new ArrayList<>(proxiedFragmentEntities.size());
 382         for (final FragmentEntity proxiedFragmentEntity : proxiedFragmentEntities) {
 383             if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
 384                 dataNodes.add(toDataNode(proxiedFragmentEntity, fetchDescendantsOption));
 385             } else {
 386                 final String normalizedXpath = getNormalizedXpath(proxiedFragmentEntity.getXpath());
 387                 final Collection<FragmentEntity> unproxiedFragmentEntities =
 388                     buildFragmentEntitiesFromFragmentExtracts(anchorEntity, normalizedXpath);
 389                 for (final FragmentEntity unproxiedFragmentEntity : unproxiedFragmentEntities) {
 390                     dataNodes.add(toDataNode(unproxiedFragmentEntity, fetchDescendantsOption));
 391                 }
 392             }
 393         }
 394         return Collections.unmodifiableList(dataNodes);
 395     }
 396
 397     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 398                                                                final Collection<FragmentEntity> fragmentEntities) {
 399         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 400         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 401             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 402         }
 403         return Collections.unmodifiableList(dataNodes);
 404     }
 405
 406     private static String getNormalizedXpath(final String xpathSource) {
 407         final String normalizedXpath;
 408         try {
 409             normalizedXpath = CpsPathUtil.getNormalizedXpath(xpathSource);
 410         } catch (final PathParsingException e) {
 411             throw new CpsPathException(e.getMessage());
 412         }
 413         return normalizedXpath;
 414     }
 415
 416     @Override
 417     public String startSession() {
 418         return sessionManager.startSession();
 419     }
 420
 421     @Override
 422     public void closeSession(final String sessionId) {
 423         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 424     }
 425
 426     @Override
 427     public void lockAnchor(final String sessionId, final String dataspaceName,
 428                            final String anchorName, final Long timeoutInMilliseconds) {
 429         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 430     }
 431
 432     private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
 433                                                     final CpsPathQuery cpsPathQuery) {
 434         final Set<String> ancestorXpath = new HashSet<>();
 435         final Pattern pattern =
 436                 Pattern.compile("([\\s\\S]*\\/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 437                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "\\/[\\s\\S]*");
 438         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 439             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 440             if (matcher.matches()) {
 441                 ancestorXpath.add(matcher.group(1));
 442             }
 443         }
 444         return ancestorXpath;
 445     }
 446
 447     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 448                                 final FetchDescendantsOption fetchDescendantsOption) {
 449         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 450         Map<String, Serializable> leaves = new HashMap<>();
 451         if (fragmentEntity.getAttributes() != null) {
 452             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 453         }
 454         return new DataNodeBuilder()
 455                 .withXpath(fragmentEntity.getXpath())
 456                 .withLeaves(leaves)
 457                 .withChildDataNodes(childDataNodes).build();
 458     }
 459
 460     private Collection<DataNode> toDataNodes(final Collection<FragmentEntity> fragmentEntities,
 461                                              final FetchDescendantsOption fetchDescendantsOption) {
 462         final Collection<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 463         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 464             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 465         }
 466         return dataNodes;
 467     }
 468
 469     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
 470                                              final FetchDescendantsOption fetchDescendantsOption) {
 471         if (fetchDescendantsOption.hasNext()) {
 472             return fragmentEntity.getChildFragments().stream()
 473                     .map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
 474                     .collect(Collectors.toList());
 475         }
 476         return Collections.emptyList();
 477     }
 478
 479     @Override
 480     public void updateDataLeaves(final String dataspaceName, final String anchorName, final String xpath,
 481                                  final Map<String, Serializable> updateLeaves) {
 482         final FragmentEntity fragmentEntity = getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, xpath);
 483         final String currentLeavesAsString = fragmentEntity.getAttributes();
 484         final String mergedLeaves = mergeLeaves(updateLeaves, currentLeavesAsString);
 485         fragmentEntity.setAttributes(mergedLeaves);
 486         fragmentRepository.save(fragmentEntity);
 487     }
 488
 489     @Override
 490     public void updateDataNodeAndDescendants(final String dataspaceName, final String anchorName,
 491                                              final DataNode dataNode) {
 492         final FragmentEntity fragmentEntity =
 493             getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, dataNode.getXpath());
 494         updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode);
 495         try {
 496             fragmentRepository.save(fragmentEntity);
 497         } catch (final StaleStateException staleStateException) {
 498             throw new ConcurrencyException("Concurrent Transactions",
 499                     String.format("dataspace :'%s', Anchor : '%s' and xpath: '%s' is updated by another transaction.",
 500                             dataspaceName, anchorName, dataNode.getXpath()));
 501         }
 502     }
 503
 504     @Override
 505     public void updateDataNodesAndDescendants(final String dataspaceName,
 506                                               final String anchorName,
 507                                               final List<DataNode> dataNodes) {
 508
 509         final Map<DataNode, FragmentEntity> dataNodeFragmentEntityMap = dataNodes.stream()
 510                 .collect(Collectors.toMap(
 511                         dataNode -> dataNode,
 512                         dataNode ->
 513                             getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, dataNode.getXpath())));
 514         dataNodeFragmentEntityMap.forEach(
 515                 (dataNode, fragmentEntity) -> updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode));
 516         try {
 517             fragmentRepository.saveAll(dataNodeFragmentEntityMap.values());
 518         } catch (final StaleStateException staleStateException) {
 519             retryUpdateDataNodesIndividually(dataspaceName, anchorName, dataNodeFragmentEntityMap.values());
 520         }
 521     }
 522
 523     private void retryUpdateDataNodesIndividually(final String dataspaceName, final String anchorName,
 524                                                   final Collection<FragmentEntity> fragmentEntities) {
 525         final Collection<String> failedXpaths = new HashSet<>();
 526
 527         fragmentEntities.forEach(dataNodeFragment -> {
 528             try {
 529                 fragmentRepository.save(dataNodeFragment);
 530             } catch (final StaleStateException e) {
 531                 failedXpaths.add(dataNodeFragment.getXpath());
 532             }
 533         });
 534
 535         if (!failedXpaths.isEmpty()) {
 536             final String failedXpathsConcatenated = String.join(",", failedXpaths);
 537             throw new ConcurrencyException("Concurrent Transactions", String.format(
 538                     "DataNodes : %s in Dataspace :'%s' with Anchor : '%s'  are updated by another transaction.",
 539                     failedXpathsConcatenated, dataspaceName, anchorName));
 540         }
 541     }
 542
 543     private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
 544                                                                 final DataNode newDataNode) {
 545
 546         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 547
 548         final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
 549                 .collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
 550
 551         final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
 552
 553         for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
 554             final FragmentEntity childFragment;
 555             if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
 556                 childFragment = convertToFragmentWithAllDescendants(
 557                         existingFragmentEntity.getDataspace(), existingFragmentEntity.getAnchor(), newDataNodeChild);
 558             } else {
 559                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
 560                 updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
 561             }
 562             updatedChildFragments.add(childFragment);
 563         }
 564
 565         existingFragmentEntity.getChildFragments().clear();
 566         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
 567     }
 568
 569     @Override
 570     @Transactional
 571     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 572                                    final Collection<DataNode> newListElements) {
 573         final FragmentEntity parentEntity =
 574             getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
 575         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
 576         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
 577                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
 578         deleteListElements(parentEntity.getChildFragments(), existingListElementFragmentEntitiesByXPath);
 579         final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
 580         for (final DataNode newListElement : newListElements) {
 581             final FragmentEntity existingListElementEntity =
 582                     existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
 583             final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
 584                     existingListElementEntity);
 585
 586             updatedChildFragmentEntities.add(entityToBeAdded);
 587         }
 588         parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
 589         fragmentRepository.save(parentEntity);
 590     }
 591
 592     @Override
 593     @Transactional
 594     public void deleteDataNodes(final String dataspaceName, final String anchorName) {
 595         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 596         anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
 597                 .ifPresent(
 598                         anchorEntity -> fragmentRepository.deleteByAnchorIn(Set.of(anchorEntity)));
 599     }
 600
 601     @Override
 602     @Transactional
 603     public void deleteListDataNode(final String dataspaceName, final String anchorName,
 604                                    final String targetXpath) {
 605         deleteDataNode(dataspaceName, anchorName, targetXpath, true);
 606     }
 607
 608     @Override
 609     @Transactional
 610     public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
 611         deleteDataNode(dataspaceName, anchorName, targetXpath, false);
 612     }
 613
 614     private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
 615                                 final boolean onlySupportListNodeDeletion) {
 616         final String parentNodeXpath;
 617         FragmentEntity parentFragmentEntity = null;
 618         boolean targetDeleted;
 619         if (isRootXpath(targetXpath)) {
 620             deleteDataNodes(dataspaceName, anchorName);
 621             targetDeleted = true;
 622         } else {
 623             if (isRootContainerNodeXpath(targetXpath)) {
 624                 parentNodeXpath = targetXpath;
 625             } else {
 626                 parentNodeXpath = CpsPathUtil.getNormalizedParentXpath(targetXpath);
 627             }
 628             parentFragmentEntity = getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
 629             if (CpsPathUtil.isPathToListElement(targetXpath)) {
 630                 targetDeleted = deleteDataNode(parentFragmentEntity, targetXpath);
 631             } else {
 632                 targetDeleted = deleteAllListElements(parentFragmentEntity, targetXpath);
 633                 final boolean tryToDeleteDataNode = !targetDeleted && !onlySupportListNodeDeletion;
 634                 if (tryToDeleteDataNode) {
 635                     targetDeleted = deleteDataNode(parentFragmentEntity, targetXpath);
 636                 }
 637             }
 638         }
 639         if (!targetDeleted) {
 640             final String additionalInformation = onlySupportListNodeDeletion
 641                     ? "The target is probably not a List." : "";
 642             throw new DataNodeNotFoundException(parentFragmentEntity.getDataspace().getName(),
 643                     parentFragmentEntity.getAnchor().getName(), targetXpath, additionalInformation);
 644         }
 645     }
 646
 647     private boolean deleteDataNode(final FragmentEntity parentFragmentEntity, final String targetXpath) {
 648         final String normalizedTargetXpath = CpsPathUtil.getNormalizedXpath(targetXpath);
 649         if (parentFragmentEntity.getXpath().equals(normalizedTargetXpath)) {
 650             fragmentNativeRepositoryImpl.deleteFragmentEntity(parentFragmentEntity.getId());
 651             return true;
 652         }
 653         if (parentFragmentEntity.getChildFragments()
 654                 .removeIf(fragment -> fragment.getXpath().equals(normalizedTargetXpath))) {
 655             fragmentRepository.save(parentFragmentEntity);
 656             return true;
 657         }
 658         return false;
 659     }
 660
 661     private boolean deleteAllListElements(final FragmentEntity parentFragmentEntity, final String listXpath) {
 662         final String normalizedListXpath = CpsPathUtil.getNormalizedXpath(listXpath);
 663         final String deleteTargetXpathPrefix = normalizedListXpath + "[";
 664         if (parentFragmentEntity.getChildFragments()
 665                 .removeIf(fragment -> fragment.getXpath().startsWith(deleteTargetXpathPrefix))) {
 666             fragmentRepository.save(parentFragmentEntity);
 667             return true;
 668         }
 669         return false;
 670     }
 671
 672     private static void deleteListElements(
 673             final Collection<FragmentEntity> fragmentEntities,
 674             final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath) {
 675         fragmentEntities.removeAll(existingListElementFragmentEntitiesByXPath.values());
 676     }
 677
 678     private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
 679         if (newListElements.isEmpty()) {
 680             throw new CpsAdminException("Invalid list replacement",
 681                     "Cannot replace list elements with empty collection");
 682         }
 683         final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
 684         return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
 685     }
 686
 687     private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
 688                                                      final DataNode newListElement,
 689                                                      final FragmentEntity existingListElementEntity) {
 690         if (existingListElementEntity == null) {
 691             return convertToFragmentWithAllDescendants(
 692                     parentEntity.getDataspace(), parentEntity.getAnchor(), newListElement);
 693         }
 694         if (newListElement.getChildDataNodes().isEmpty()) {
 695             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
 696             existingListElementEntity.getChildFragments().clear();
 697         } else {
 698             updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
 699         }
 700         return existingListElementEntity;
 701     }
 702
 703     private static boolean isNewDataNode(final DataNode replacementDataNode,
 704                                          final Map<String, FragmentEntity> existingListElementsByXpath) {
 705         return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
 706     }
 707
 708     private static boolean isRootContainerNodeXpath(final String xpath) {
 709         return 0 == xpath.lastIndexOf('/');
 710     }
 711
 712     private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
 713                                                   final DataNode newListElement) {
 714         final FragmentEntity replacementFragmentEntity =
 715                 FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
 716                         newListElement.getLeaves())).build();
 717         existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
 718     }
 719
 720     private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
 721             final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
 722         return childEntities.stream()
 723                 .filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
 724                 .collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
 725     }
 726
 727     private static boolean isRootXpath(final String xpath) {
 728         return "/".equals(xpath) || "".equals(xpath);
 729     }
 730
 731     private String mergeLeaves(final Map<String, Serializable> updateLeaves, final String currentLeavesAsString) {
 732         final Map<String, Serializable> currentLeavesAsMap = currentLeavesAsString.isEmpty()
 733             ? new HashMap<>() : jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
 734         currentLeavesAsMap.putAll(updateLeaves);
 735         if (currentLeavesAsMap.isEmpty()) {
 736             return "";
 737         }
 738         return jsonObjectMapper.asJsonString(currentLeavesAsMap);
 739     }
 740 }