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

   1 /*
   2  *  ============LICENSE_START=======================================================
   3  *  Copyright (C) 2021-2023 Nordix Foundation
   4  *  Modifications Copyright (C) 2021 Pantheon.tech
   5  *  Modifications Copyright (C) 2020-2022 Bell Canada.
   6  *  Modifications Copyright (C) 2022-2023 TechMahindra Ltd.
   7  *  ================================================================================
   8  *  Licensed under the Apache License, Version 2.0 (the "License");
   9  *  you may not use this file except in compliance with the License.
  10  *  You may obtain a copy of the License at
  11  *
  12  *        http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  *  Unless required by applicable law or agreed to in writing, software
  15  *  distributed under the License is distributed on an "AS IS" BASIS,
  16  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  *  See the License for the specific language governing permissions and
  18  *  limitations under the License.
  19  *
  20  *  SPDX-License-Identifier: Apache-2.0
  21  *  ============LICENSE_END=========================================================
  22  */
  23
  24 package org.onap.cps.spi.impl;
  25
  26 import com.google.common.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.exceptions.DataNodeNotFoundExceptionBatch;
  61 import org.onap.cps.spi.model.DataNode;
  62 import org.onap.cps.spi.model.DataNodeBuilder;
  63 import org.onap.cps.spi.repository.AnchorRepository;
  64 import org.onap.cps.spi.repository.DataspaceRepository;
  65 import org.onap.cps.spi.repository.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
  83     private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@[\\s\\S]+?])?)";
  84
  85     @Override
  86     public void addChildDataNode(final String dataspaceName, final String anchorName, final String parentNodeXpath,
  87                                  final DataNode newChildDataNode) {
  88         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
  89         addNewChildDataNode(anchorEntity, 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         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
  96         addChildrenDataNodes(anchorEntity, parentNodeXpath, dataNodes);
  97     }
  98
  99     @Override
 100     public void addListElements(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 101                                 final Collection<DataNode> newListElements) {
 102         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 103         addChildrenDataNodes(anchorEntity, parentNodeXpath, newListElements);
 104     }
 105
 106     @Override
 107     public void addMultipleLists(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 108                                  final Collection<Collection<DataNode>> newLists) {
 109         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 110         final Collection<String> failedXpaths = new HashSet<>();
 111         for (final Collection<DataNode> newList : newLists) {
 112             try {
 113                 addChildrenDataNodes(anchorEntity, parentNodeXpath, newList);
 114             } catch (final AlreadyDefinedExceptionBatch e) {
 115                 failedXpaths.addAll(e.getAlreadyDefinedXpaths());
 116             }
 117         }
 118         if (!failedXpaths.isEmpty()) {
 119             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 120         }
 121     }
 122
 123     private void addNewChildDataNode(final AnchorEntity anchorEntity, final String parentNodeXpath,
 124                                      final DataNode newChild) {
 125         final FragmentEntity parentFragmentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 126         final FragmentEntity newChildAsFragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, newChild);
 127         newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 128         try {
 129             fragmentRepository.save(newChildAsFragmentEntity);
 130         } catch (final DataIntegrityViolationException e) {
 131             throw AlreadyDefinedException.forDataNode(newChild.getXpath(), anchorEntity.getName(), e);
 132         }
 133     }
 134
 135     private void addChildrenDataNodes(final AnchorEntity anchorEntity, final String parentNodeXpath,
 136                                       final Collection<DataNode> newChildren) {
 137         final FragmentEntity parentFragmentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 138         final List<FragmentEntity> fragmentEntities = new ArrayList<>(newChildren.size());
 139         try {
 140             for (final DataNode newChildAsDataNode : newChildren) {
 141                 final FragmentEntity newChildAsFragmentEntity =
 142                     convertToFragmentWithAllDescendants(anchorEntity, newChildAsDataNode);
 143                 newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 144                 fragmentEntities.add(newChildAsFragmentEntity);
 145             }
 146             fragmentRepository.saveAll(fragmentEntities);
 147         } catch (final DataIntegrityViolationException e) {
 148             log.warn("Exception occurred : {} , While saving : {} children, retrying using individual save operations",
 149                     e, fragmentEntities.size());
 150             retrySavingEachChildIndividually(anchorEntity, parentNodeXpath, newChildren);
 151         }
 152     }
 153
 154     private void retrySavingEachChildIndividually(final AnchorEntity anchorEntity, final String parentNodeXpath,
 155                                                   final Collection<DataNode> newChildren) {
 156         final Collection<String> failedXpaths = new HashSet<>();
 157         for (final DataNode newChild : newChildren) {
 158             try {
 159                 addNewChildDataNode(anchorEntity, parentNodeXpath, newChild);
 160             } catch (final AlreadyDefinedException e) {
 161                 failedXpaths.add(newChild.getXpath());
 162             }
 163         }
 164         if (!failedXpaths.isEmpty()) {
 165             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 166         }
 167     }
 168
 169     @Override
 170     public void storeDataNode(final String dataspaceName, final String anchorName, final DataNode dataNode) {
 171         storeDataNodes(dataspaceName, anchorName, Collections.singletonList(dataNode));
 172     }
 173
 174     @Override
 175     public void storeDataNodes(final String dataspaceName, final String anchorName,
 176                                final Collection<DataNode> dataNodes) {
 177         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 178         final List<FragmentEntity> fragmentEntities = new ArrayList<>(dataNodes.size());
 179         try {
 180             for (final DataNode dataNode: dataNodes) {
 181                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, dataNode);
 182                 fragmentEntities.add(fragmentEntity);
 183             }
 184             fragmentRepository.saveAll(fragmentEntities);
 185         } catch (final DataIntegrityViolationException exception) {
 186             log.warn("Exception occurred : {} , While saving : {} data nodes, Retrying saving data nodes individually",
 187                     exception, dataNodes.size());
 188             storeDataNodesIndividually(anchorEntity, dataNodes);
 189         }
 190     }
 191
 192     private void storeDataNodesIndividually(final AnchorEntity anchorEntity, final Collection<DataNode> dataNodes) {
 193         final Collection<String> failedXpaths = new HashSet<>();
 194         for (final DataNode dataNode: dataNodes) {
 195             try {
 196                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, dataNode);
 197                 fragmentRepository.save(fragmentEntity);
 198             } catch (final DataIntegrityViolationException e) {
 199                 failedXpaths.add(dataNode.getXpath());
 200             }
 201         }
 202         if (!failedXpaths.isEmpty()) {
 203             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 204         }
 205     }
 206
 207     /**
 208      * Convert DataNode object into Fragment and places the result in the fragments placeholder. Performs same action
 209      * for all DataNode children recursively.
 210      *
 211      * @param anchorEntity          anchorEntity
 212      * @param dataNodeToBeConverted dataNode
 213      * @return a Fragment built from current DataNode
 214      */
 215     private FragmentEntity convertToFragmentWithAllDescendants(final AnchorEntity anchorEntity,
 216                                                                final DataNode dataNodeToBeConverted) {
 217         final FragmentEntity parentFragment = toFragmentEntity(anchorEntity, dataNodeToBeConverted);
 218         final Builder<FragmentEntity> childFragmentsImmutableSetBuilder = ImmutableSet.builder();
 219         for (final DataNode childDataNode : dataNodeToBeConverted.getChildDataNodes()) {
 220             final FragmentEntity childFragment = convertToFragmentWithAllDescendants(anchorEntity, childDataNode);
 221             childFragmentsImmutableSetBuilder.add(childFragment);
 222         }
 223         parentFragment.setChildFragments(childFragmentsImmutableSetBuilder.build());
 224         return parentFragment;
 225     }
 226
 227     private FragmentEntity toFragmentEntity(final AnchorEntity anchorEntity, final DataNode dataNode) {
 228         return FragmentEntity.builder()
 229                 .dataspace(anchorEntity.getDataspace())
 230                 .anchor(anchorEntity)
 231                 .xpath(dataNode.getXpath())
 232                 .attributes(jsonObjectMapper.asJsonString(dataNode.getLeaves()))
 233                 .build();
 234     }
 235
 236     @Override
 237     public Collection<DataNode> getDataNodes(final String dataspaceName, final String anchorName,
 238                                              final String xpath,
 239                                              final FetchDescendantsOption fetchDescendantsOption) {
 240         final String targetXpath = getNormalizedXpath(xpath);
 241         final Collection<DataNode> dataNodes = getDataNodesForMultipleXpaths(dataspaceName, anchorName,
 242                 Collections.singletonList(targetXpath), fetchDescendantsOption);
 243         if (dataNodes.isEmpty()) {
 244             throw new DataNodeNotFoundException(dataspaceName, anchorName, xpath);
 245         }
 246         return dataNodes;
 247     }
 248
 249     @Override
 250     public Collection<DataNode> getDataNodesForMultipleXpaths(final String dataspaceName, final String anchorName,
 251                                                               final Collection<String> xpaths,
 252                                                               final FetchDescendantsOption fetchDescendantsOption) {
 253         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 254         final Collection<FragmentEntity> fragmentEntities = getFragmentEntities(anchorEntity, xpaths);
 255         return toDataNodes(fragmentEntities, fetchDescendantsOption);
 256     }
 257
 258     private Collection<FragmentEntity> getFragmentEntities(final AnchorEntity anchorEntity,
 259                                                            final Collection<String> xpaths) {
 260         final Collection<String> nonRootXpaths = new HashSet<>(xpaths);
 261         final boolean haveRootXpath = nonRootXpaths.removeIf(CpsDataPersistenceServiceImpl::isRootXpath);
 262
 263         final Collection<String> normalizedXpaths = new HashSet<>(nonRootXpaths.size());
 264         for (final String xpath : nonRootXpaths) {
 265             try {
 266                 normalizedXpaths.add(CpsPathUtil.getNormalizedXpath(xpath));
 267             } catch (final PathParsingException e) {
 268                 log.warn("Error parsing xpath \"{}\": {}", xpath, e.getMessage());
 269             }
 270         }
 271         final Collection<FragmentEntity> fragmentEntities =
 272             new HashSet<>(fragmentRepository.findByAnchorAndMultipleCpsPaths(anchorEntity.getId(), normalizedXpaths));
 273
 274         if (haveRootXpath) {
 275             final List<FragmentExtract> fragmentExtracts = fragmentRepository.findAllExtractsByAnchor(anchorEntity);
 276             fragmentEntities.addAll(FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts));
 277         }
 278
 279         return fragmentEntities;
 280     }
 281
 282     private FragmentEntity getFragmentEntity(final AnchorEntity anchorEntity, final String xpath) {
 283         final FragmentEntity fragmentEntity;
 284         if (isRootXpath(xpath)) {
 285             final List<FragmentExtract> fragmentExtracts = fragmentRepository.findAllExtractsByAnchor(anchorEntity);
 286             fragmentEntity = FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts)
 287                 .stream().findFirst().orElse(null);
 288         } else {
 289             fragmentEntity = fragmentRepository.getByAnchorAndXpath(anchorEntity, getNormalizedXpath(xpath));
 290         }
 291         if (fragmentEntity == null) {
 292             throw new DataNodeNotFoundException(anchorEntity.getDataspace().getName(), anchorEntity.getName(), xpath);
 293         }
 294         return fragmentEntity;
 295     }
 296
 297     private Collection<FragmentEntity> buildFragmentEntitiesFromFragmentExtracts(final AnchorEntity anchorEntity,
 298                                                                                  final String normalizedXpath) {
 299         final List<FragmentExtract> fragmentExtracts =
 300             fragmentRepository.findByAnchorAndParentXpath(anchorEntity, normalizedXpath);
 301         return FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
 302     }
 303
 304     @Override
 305     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
 306                                          final FetchDescendantsOption fetchDescendantsOption) {
 307         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 308         final CpsPathQuery cpsPathQuery;
 309         try {
 310             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 311         } catch (final PathParsingException e) {
 312             throw new CpsPathException(e.getMessage());
 313         }
 314
 315         Collection<FragmentEntity> fragmentEntities;
 316         if (canUseRegexQuickFind(fetchDescendantsOption, cpsPathQuery)) {
 317             return getDataNodesUsingRegexQuickFind(fetchDescendantsOption, anchorEntity, cpsPathQuery);
 318         }
 319         fragmentEntities = fragmentRepository.findByAnchorAndCpsPath(anchorEntity.getId(), cpsPathQuery);
 320         if (cpsPathQuery.hasAncestorAxis()) {
 321             fragmentEntities = getAncestorFragmentEntities(anchorEntity.getId(), cpsPathQuery, fragmentEntities);
 322         }
 323         return createDataNodesFromProxiedFragmentEntities(fetchDescendantsOption, anchorEntity, fragmentEntities);
 324     }
 325
 326     private static boolean canUseRegexQuickFind(final FetchDescendantsOption fetchDescendantsOption,
 327                                                 final CpsPathQuery cpsPathQuery) {
 328         return fetchDescendantsOption.equals(FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS)
 329             && !cpsPathQuery.hasLeafConditions()
 330             && !cpsPathQuery.hasTextFunctionCondition();
 331     }
 332
 333     private List<DataNode> getDataNodesUsingRegexQuickFind(final FetchDescendantsOption fetchDescendantsOption,
 334                                                            final AnchorEntity anchorEntity,
 335                                                            final CpsPathQuery cpsPathQuery) {
 336         Collection<FragmentEntity> fragmentEntities;
 337         final String xpathRegex = FragmentQueryBuilder.getXpathSqlRegex(cpsPathQuery, true);
 338         final List<FragmentExtract> fragmentExtracts =
 339             fragmentRepository.quickFindWithDescendants(anchorEntity.getId(), xpathRegex);
 340         fragmentEntities = FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
 341         if (cpsPathQuery.hasAncestorAxis()) {
 342             fragmentEntities = getAncestorFragmentEntities(anchorEntity.getId(), cpsPathQuery, fragmentEntities);
 343         }
 344         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 345     }
 346
 347     private Collection<FragmentEntity> getAncestorFragmentEntities(final int anchorId,
 348                                                                    final CpsPathQuery cpsPathQuery,
 349                                                                    final Collection<FragmentEntity> fragmentEntities) {
 350         final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 351         return ancestorXpaths.isEmpty() ? Collections.emptyList()
 352             : fragmentRepository.findByAnchorAndMultipleCpsPaths(anchorId, ancestorXpaths);
 353     }
 354
 355     private List<DataNode> createDataNodesFromProxiedFragmentEntities(
 356                                             final FetchDescendantsOption fetchDescendantsOption,
 357                                             final AnchorEntity anchorEntity,
 358                                             final Collection<FragmentEntity> proxiedFragmentEntities) {
 359         final List<DataNode> dataNodes = new ArrayList<>(proxiedFragmentEntities.size());
 360         for (final FragmentEntity proxiedFragmentEntity : proxiedFragmentEntities) {
 361             if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
 362                 dataNodes.add(toDataNode(proxiedFragmentEntity, fetchDescendantsOption));
 363             } else {
 364                 final String normalizedXpath = getNormalizedXpath(proxiedFragmentEntity.getXpath());
 365                 final Collection<FragmentEntity> unproxiedFragmentEntities =
 366                     buildFragmentEntitiesFromFragmentExtracts(anchorEntity, normalizedXpath);
 367                 for (final FragmentEntity unproxiedFragmentEntity : unproxiedFragmentEntities) {
 368                     dataNodes.add(toDataNode(unproxiedFragmentEntity, fetchDescendantsOption));
 369                 }
 370             }
 371         }
 372         return Collections.unmodifiableList(dataNodes);
 373     }
 374
 375     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 376                                                                final Collection<FragmentEntity> fragmentEntities) {
 377         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 378         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 379             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 380         }
 381         return Collections.unmodifiableList(dataNodes);
 382     }
 383
 384     private static String getNormalizedXpath(final String xpathSource) {
 385         if (isRootXpath(xpathSource)) {
 386             return xpathSource;
 387         }
 388         try {
 389             return CpsPathUtil.getNormalizedXpath(xpathSource);
 390         } catch (final PathParsingException e) {
 391             throw new CpsPathException(e.getMessage());
 392         }
 393     }
 394
 395     @Override
 396     public String startSession() {
 397         return sessionManager.startSession();
 398     }
 399
 400     @Override
 401     public void closeSession(final String sessionId) {
 402         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 403     }
 404
 405     @Override
 406     public void lockAnchor(final String sessionId, final String dataspaceName,
 407                            final String anchorName, final Long timeoutInMilliseconds) {
 408         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 409     }
 410
 411     private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
 412                                                     final CpsPathQuery cpsPathQuery) {
 413         final Set<String> ancestorXpath = new HashSet<>();
 414         final Pattern pattern =
 415                 Pattern.compile("([\\s\\S]*/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 416                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "/[\\s\\S]*");
 417         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 418             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 419             if (matcher.matches()) {
 420                 ancestorXpath.add(matcher.group(1));
 421             }
 422         }
 423         return ancestorXpath;
 424     }
 425
 426     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 427                                 final FetchDescendantsOption fetchDescendantsOption) {
 428         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 429         Map<String, Serializable> leaves = new HashMap<>();
 430         if (fragmentEntity.getAttributes() != null) {
 431             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 432         }
 433         return new DataNodeBuilder()
 434                 .withXpath(fragmentEntity.getXpath())
 435                 .withLeaves(leaves)
 436                 .withChildDataNodes(childDataNodes).build();
 437     }
 438
 439     private Collection<DataNode> toDataNodes(final Collection<FragmentEntity> fragmentEntities,
 440                                              final FetchDescendantsOption fetchDescendantsOption) {
 441         final Collection<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 442         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 443             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 444         }
 445         return dataNodes;
 446     }
 447
 448     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
 449                                              final FetchDescendantsOption fetchDescendantsOption) {
 450         if (fetchDescendantsOption.hasNext()) {
 451             return fragmentEntity.getChildFragments().stream()
 452                     .map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
 453                     .collect(Collectors.toList());
 454         }
 455         return Collections.emptyList();
 456     }
 457
 458     @Override
 459     public void updateDataLeaves(final String dataspaceName, final String anchorName, final String xpath,
 460                                  final Map<String, Serializable> updateLeaves) {
 461         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 462         final FragmentEntity fragmentEntity = getFragmentEntity(anchorEntity, xpath);
 463         final String currentLeavesAsString = fragmentEntity.getAttributes();
 464         final String mergedLeaves = mergeLeaves(updateLeaves, currentLeavesAsString);
 465         fragmentEntity.setAttributes(mergedLeaves);
 466         fragmentRepository.save(fragmentEntity);
 467     }
 468
 469     @Override
 470     public void updateDataNodeAndDescendants(final String dataspaceName, final String anchorName,
 471                                              final DataNode dataNode) {
 472         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 473         final FragmentEntity fragmentEntity = getFragmentEntity(anchorEntity, dataNode.getXpath());
 474         updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode);
 475         try {
 476             fragmentRepository.save(fragmentEntity);
 477         } catch (final StaleStateException staleStateException) {
 478             throw new ConcurrencyException("Concurrent Transactions",
 479                     String.format("dataspace :'%s', Anchor : '%s' and xpath: '%s' is updated by another transaction.",
 480                             dataspaceName, anchorName, dataNode.getXpath()));
 481         }
 482     }
 483
 484     @Override
 485     public void updateDataNodesAndDescendants(final String dataspaceName, final String anchorName,
 486                                               final List<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         final Collection<FragmentEntity> existingFragmentEntities = getFragmentEntities(anchorEntity, xpaths);
 494
 495         for (final FragmentEntity existingFragmentEntity : existingFragmentEntities) {
 496             final DataNode updatedDataNode = xpathToUpdatedDataNode.get(existingFragmentEntity.getXpath());
 497             updateFragmentEntityAndDescendantsWithDataNode(existingFragmentEntity, updatedDataNode);
 498         }
 499
 500         try {
 501             fragmentRepository.saveAll(existingFragmentEntities);
 502         } catch (final StaleStateException staleStateException) {
 503             retryUpdateDataNodesIndividually(anchorEntity, existingFragmentEntities);
 504         }
 505     }
 506
 507     private void retryUpdateDataNodesIndividually(final AnchorEntity anchorEntity,
 508                                                   final Collection<FragmentEntity> fragmentEntities) {
 509         final Collection<String> failedXpaths = new HashSet<>();
 510         for (final FragmentEntity dataNodeFragment : fragmentEntities) {
 511             try {
 512                 fragmentRepository.save(dataNodeFragment);
 513             } catch (final StaleStateException e) {
 514                 failedXpaths.add(dataNodeFragment.getXpath());
 515             }
 516         }
 517         if (!failedXpaths.isEmpty()) {
 518             final String failedXpathsConcatenated = String.join(",", failedXpaths);
 519             throw new ConcurrencyException("Concurrent Transactions", String.format(
 520                     "DataNodes : %s in Dataspace :'%s' with Anchor : '%s'  are updated by another transaction.",
 521                     failedXpathsConcatenated, anchorEntity.getDataspace().getName(), anchorEntity.getName()));
 522         }
 523     }
 524
 525     private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
 526                                                                 final DataNode newDataNode) {
 527         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 528
 529         final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
 530                 .collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
 531
 532         final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
 533         for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
 534             final FragmentEntity childFragment;
 535             if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
 536                 childFragment = convertToFragmentWithAllDescendants(existingFragmentEntity.getAnchor(),
 537                     newDataNodeChild);
 538             } else {
 539                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
 540                 updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
 541             }
 542             updatedChildFragments.add(childFragment);
 543         }
 544
 545         existingFragmentEntity.getChildFragments().clear();
 546         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
 547     }
 548
 549     @Override
 550     @Transactional
 551     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 552                                    final Collection<DataNode> newListElements) {
 553         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 554         final FragmentEntity parentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 555         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
 556         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
 557                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
 558         parentEntity.getChildFragments().removeAll(existingListElementFragmentEntitiesByXPath.values());
 559         final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
 560         for (final DataNode newListElement : newListElements) {
 561             final FragmentEntity existingListElementEntity =
 562                     existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
 563             final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
 564                     existingListElementEntity);
 565             updatedChildFragmentEntities.add(entityToBeAdded);
 566         }
 567         parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
 568         fragmentRepository.save(parentEntity);
 569     }
 570
 571     @Override
 572     @Transactional
 573     public void deleteDataNodes(final String dataspaceName, final String anchorName) {
 574         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 575         anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
 576             .ifPresent(anchorEntity -> fragmentRepository.deleteByAnchorIn(Collections.singletonList(anchorEntity)));
 577     }
 578
 579     @Override
 580     @Transactional
 581     public void deleteDataNodes(final String dataspaceName, final Collection<String> anchorNames) {
 582         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 583         final Collection<AnchorEntity> anchorEntities =
 584             anchorRepository.findAllByDataspaceAndNameIn(dataspaceEntity, anchorNames);
 585         fragmentRepository.deleteByAnchorIn(anchorEntities);
 586     }
 587
 588     @Override
 589     @Transactional
 590     public void deleteDataNodes(final String dataspaceName, final String anchorName,
 591                                 final Collection<String> xpathsToDelete) {
 592         deleteDataNodes(dataspaceName, anchorName, xpathsToDelete, false);
 593     }
 594
 595     private void deleteDataNodes(final String dataspaceName, final String anchorName,
 596                                  final Collection<String> xpathsToDelete, final boolean onlySupportListDeletion) {
 597         final boolean haveRootXpath = xpathsToDelete.stream().anyMatch(CpsDataPersistenceServiceImpl::isRootXpath);
 598         if (haveRootXpath) {
 599             deleteDataNodes(dataspaceName, anchorName);
 600             return;
 601         }
 602
 603         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 604
 605         final Collection<String> deleteChecklist = new HashSet<>(xpathsToDelete.size());
 606         for (final String xpath : xpathsToDelete) {
 607             try {
 608                 deleteChecklist.add(CpsPathUtil.getNormalizedXpath(xpath));
 609             } catch (final PathParsingException e) {
 610                 log.warn("Error parsing xpath \"{}\": {}", xpath, e.getMessage());
 611             }
 612         }
 613
 614         final Collection<String> xpathsToExistingContainers =
 615             fragmentRepository.findAllXpathByAnchorAndXpathIn(anchorEntity, deleteChecklist);
 616         if (onlySupportListDeletion) {
 617             final Collection<String> xpathsToExistingListElements = xpathsToExistingContainers.stream()
 618                 .filter(CpsPathUtil::isPathToListElement).collect(Collectors.toList());
 619             deleteChecklist.removeAll(xpathsToExistingListElements);
 620         } else {
 621             deleteChecklist.removeAll(xpathsToExistingContainers);
 622         }
 623
 624         final Collection<String> xpathsToExistingLists = deleteChecklist.stream()
 625             .filter(xpath -> fragmentRepository.existsByAnchorAndXpathStartsWith(anchorEntity, xpath + "["))
 626             .collect(Collectors.toList());
 627         deleteChecklist.removeAll(xpathsToExistingLists);
 628
 629         if (!deleteChecklist.isEmpty()) {
 630             throw new DataNodeNotFoundExceptionBatch(dataspaceName, anchorName, deleteChecklist);
 631         }
 632
 633         fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingContainers);
 634         fragmentRepository.deleteListsByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingLists);
 635     }
 636
 637     @Override
 638     @Transactional
 639     public void deleteListDataNode(final String dataspaceName, final String anchorName,
 640                                    final String targetXpath) {
 641         deleteDataNode(dataspaceName, anchorName, targetXpath, true);
 642     }
 643
 644     @Override
 645     @Transactional
 646     public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
 647         deleteDataNode(dataspaceName, anchorName, targetXpath, false);
 648     }
 649
 650     private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
 651                                 final boolean onlySupportListNodeDeletion) {
 652         final String normalizedXpath = getNormalizedXpath(targetXpath);
 653         try {
 654             deleteDataNodes(dataspaceName, anchorName, Collections.singletonList(normalizedXpath),
 655                 onlySupportListNodeDeletion);
 656         } catch (final DataNodeNotFoundExceptionBatch dataNodeNotFoundExceptionBatch) {
 657             throw new DataNodeNotFoundException(dataspaceName, anchorName, targetXpath);
 658         }
 659     }
 660
 661     private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
 662         if (newListElements.isEmpty()) {
 663             throw new CpsAdminException("Invalid list replacement",
 664                     "Cannot replace list elements with empty collection");
 665         }
 666         final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
 667         return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
 668     }
 669
 670     private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
 671                                                      final DataNode newListElement,
 672                                                      final FragmentEntity existingListElementEntity) {
 673         if (existingListElementEntity == null) {
 674             return convertToFragmentWithAllDescendants(parentEntity.getAnchor(), newListElement);
 675         }
 676         if (newListElement.getChildDataNodes().isEmpty()) {
 677             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
 678             existingListElementEntity.getChildFragments().clear();
 679         } else {
 680             updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
 681         }
 682         return existingListElementEntity;
 683     }
 684
 685     private static boolean isNewDataNode(final DataNode replacementDataNode,
 686                                          final Map<String, FragmentEntity> existingListElementsByXpath) {
 687         return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
 688     }
 689
 690     private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
 691                                                   final DataNode newListElement) {
 692         final FragmentEntity replacementFragmentEntity =
 693                 FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
 694                         newListElement.getLeaves())).build();
 695         existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
 696     }
 697
 698     private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
 699             final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
 700         return childEntities.stream()
 701                 .filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
 702                 .collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
 703     }
 704
 705     private static boolean isRootXpath(final String xpath) {
 706         return "/".equals(xpath) || "".equals(xpath);
 707     }
 708
 709     private String mergeLeaves(final Map<String, Serializable> updateLeaves, final String currentLeavesAsString) {
 710         final Map<String, Serializable> currentLeavesAsMap = currentLeavesAsString.isEmpty()
 711             ? new HashMap<>() : jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
 712         currentLeavesAsMap.putAll(updateLeaves);
 713         if (currentLeavesAsMap.isEmpty()) {
 714             return "";
 715         }
 716         return jsonObjectMapper.asJsonString(currentLeavesAsMap);
 717     }
 718
 719     private AnchorEntity getAnchorEntity(final String dataspaceName, final String anchorName) {
 720         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 721         return anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 722     }
 723 }