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

   1 /*
   2  *  ============LICENSE_START=======================================================
   3  *  Copyright (C) 2021-2023 Nordix Foundation
   4  *  Modifications Copyright (C) 2021 Pantheon.tech
   5  *  Modifications Copyright (C) 2020-2022 Bell Canada.
   6  *  Modifications Copyright (C) 2022-2023 TechMahindra Ltd.
   7  *  ================================================================================
   8  *  Licensed under the Apache License, Version 2.0 (the "License");
   9  *  you may not use this file except in compliance with the License.
  10  *  You may obtain a copy of the License at
  11  *
  12  *        http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  *  Unless required by applicable law or agreed to in writing, software
  15  *  distributed under the License is distributed on an "AS IS" BASIS,
  16  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  *  See the License for the specific language governing permissions and
  18  *  limitations under the License.
  19  *
  20  *  SPDX-License-Identifier: Apache-2.0
  21  *  ============LICENSE_END=========================================================
  22  */
  23
  24 package org.onap.cps.spi.impl;
  25
  26 import com.google.common.base.Strings;
  27 import com.google.common.collect.ImmutableSet;
  28 import com.google.common.collect.ImmutableSet.Builder;
  29 import io.micrometer.core.annotation.Timed;
  30 import java.io.Serializable;
  31 import java.util.ArrayList;
  32 import java.util.Collection;
  33 import java.util.Collections;
  34 import java.util.HashMap;
  35 import java.util.HashSet;
  36 import java.util.List;
  37 import java.util.Map;
  38 import java.util.Set;
  39 import java.util.function.Function;
  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.entities.AnchorEntity;
  53 import org.onap.cps.spi.entities.DataspaceEntity;
  54 import org.onap.cps.spi.entities.FragmentEntity;
  55 import org.onap.cps.spi.entities.FragmentEntityArranger;
  56 import org.onap.cps.spi.entities.FragmentExtract;
  57 import org.onap.cps.spi.exceptions.AlreadyDefinedException;
  58 import org.onap.cps.spi.exceptions.AlreadyDefinedExceptionBatch;
  59 import org.onap.cps.spi.exceptions.ConcurrencyException;
  60 import org.onap.cps.spi.exceptions.CpsAdminException;
  61 import org.onap.cps.spi.exceptions.CpsPathException;
  62 import org.onap.cps.spi.exceptions.DataNodeNotFoundException;
  63 import org.onap.cps.spi.exceptions.DataNodeNotFoundExceptionBatch;
  64 import org.onap.cps.spi.model.DataNode;
  65 import org.onap.cps.spi.model.DataNodeBuilder;
  66 import org.onap.cps.spi.repository.AnchorRepository;
  67 import org.onap.cps.spi.repository.DataspaceRepository;
  68 import org.onap.cps.spi.repository.FragmentRepository;
  69 import org.onap.cps.spi.utils.SessionManager;
  70 import org.onap.cps.utils.JsonObjectMapper;
  71 import org.springframework.dao.DataIntegrityViolationException;
  72 import org.springframework.stereotype.Service;
  73
  74 @Service
  75 @Slf4j
  76 @RequiredArgsConstructor
  77 public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService {
  78
  79     private final DataspaceRepository dataspaceRepository;
  80     private final AnchorRepository anchorRepository;
  81     private final FragmentRepository fragmentRepository;
  82     private final JsonObjectMapper jsonObjectMapper;
  83     private final SessionManager sessionManager;
  84
  85     private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@.+?])?)";
  86     private static final String QUERY_ACROSS_ANCHORS = null;
  87     private static final AnchorEntity ALL_ANCHORS = null;
  88
  89     @Override
  90     public void addChildDataNodes(final String dataspaceName, final String anchorName,
  91                                   final String parentNodeXpath, final Collection<DataNode> dataNodes) {
  92         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
  93         addChildrenDataNodes(anchorEntity, parentNodeXpath, dataNodes);
  94     }
  95
  96     @Override
  97     public void addListElements(final String dataspaceName, final String anchorName, final String parentNodeXpath,
  98                                 final Collection<DataNode> newListElements) {
  99         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 100         addChildrenDataNodes(anchorEntity, parentNodeXpath, newListElements);
 101     }
 102
 103     @Override
 104     public void addMultipleLists(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 105                                  final Collection<Collection<DataNode>> newLists) {
 106         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 107         final Collection<String> failedXpaths = new HashSet<>();
 108         for (final Collection<DataNode> newList : newLists) {
 109             try {
 110                 addChildrenDataNodes(anchorEntity, parentNodeXpath, newList);
 111             } catch (final AlreadyDefinedExceptionBatch e) {
 112                 failedXpaths.addAll(e.getAlreadyDefinedXpaths());
 113             }
 114         }
 115         if (!failedXpaths.isEmpty()) {
 116             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 117         }
 118     }
 119
 120     private void addNewChildDataNode(final AnchorEntity anchorEntity, final String parentNodeXpath,
 121                                      final DataNode newChild) {
 122         final FragmentEntity parentFragmentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 123         final FragmentEntity newChildAsFragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, newChild);
 124         newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 125         try {
 126             fragmentRepository.save(newChildAsFragmentEntity);
 127         } catch (final DataIntegrityViolationException e) {
 128             throw AlreadyDefinedException.forDataNode(newChild.getXpath(), anchorEntity.getName(), e);
 129         }
 130     }
 131
 132     private void addChildrenDataNodes(final AnchorEntity anchorEntity, final String parentNodeXpath,
 133                                       final Collection<DataNode> newChildren) {
 134         final FragmentEntity parentFragmentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 135         final List<FragmentEntity> fragmentEntities = new ArrayList<>(newChildren.size());
 136         try {
 137             for (final DataNode newChildAsDataNode : newChildren) {
 138                 final FragmentEntity newChildAsFragmentEntity =
 139                     convertToFragmentWithAllDescendants(anchorEntity, newChildAsDataNode);
 140                 newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 141                 fragmentEntities.add(newChildAsFragmentEntity);
 142             }
 143             fragmentRepository.saveAll(fragmentEntities);
 144         } catch (final DataIntegrityViolationException e) {
 145             log.warn("Exception occurred : {} , While saving : {} children, retrying using individual save operations",
 146                     e, fragmentEntities.size());
 147             retrySavingEachChildIndividually(anchorEntity, parentNodeXpath, newChildren);
 148         }
 149     }
 150
 151     private void retrySavingEachChildIndividually(final AnchorEntity anchorEntity, final String parentNodeXpath,
 152                                                   final Collection<DataNode> newChildren) {
 153         final Collection<String> failedXpaths = new HashSet<>();
 154         for (final DataNode newChild : newChildren) {
 155             try {
 156                 addNewChildDataNode(anchorEntity, parentNodeXpath, newChild);
 157             } catch (final AlreadyDefinedException e) {
 158                 failedXpaths.add(newChild.getXpath());
 159             }
 160         }
 161         if (!failedXpaths.isEmpty()) {
 162             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 163         }
 164     }
 165
 166     @Override
 167     public void storeDataNodes(final String dataspaceName, final String anchorName,
 168                                final Collection<DataNode> dataNodes) {
 169         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 170         final List<FragmentEntity> fragmentEntities = new ArrayList<>(dataNodes.size());
 171         try {
 172             for (final DataNode dataNode: dataNodes) {
 173                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, dataNode);
 174                 fragmentEntities.add(fragmentEntity);
 175             }
 176             fragmentRepository.saveAll(fragmentEntities);
 177         } catch (final DataIntegrityViolationException exception) {
 178             log.warn("Exception occurred : {} , While saving : {} data nodes, Retrying saving data nodes individually",
 179                     exception, dataNodes.size());
 180             storeDataNodesIndividually(anchorEntity, dataNodes);
 181         }
 182     }
 183
 184     private void storeDataNodesIndividually(final AnchorEntity anchorEntity, final Collection<DataNode> dataNodes) {
 185         final Collection<String> failedXpaths = new HashSet<>();
 186         for (final DataNode dataNode: dataNodes) {
 187             try {
 188                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, dataNode);
 189                 fragmentRepository.save(fragmentEntity);
 190             } catch (final DataIntegrityViolationException e) {
 191                 failedXpaths.add(dataNode.getXpath());
 192             }
 193         }
 194         if (!failedXpaths.isEmpty()) {
 195             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 196         }
 197     }
 198
 199     /**
 200      * Convert DataNode object into Fragment and places the result in the fragments placeholder. Performs same action
 201      * for all DataNode children recursively.
 202      *
 203      * @param anchorEntity          anchorEntity
 204      * @param dataNodeToBeConverted dataNode
 205      * @return a Fragment built from current DataNode
 206      */
 207     private FragmentEntity convertToFragmentWithAllDescendants(final AnchorEntity anchorEntity,
 208                                                                final DataNode dataNodeToBeConverted) {
 209         final FragmentEntity parentFragment = toFragmentEntity(anchorEntity, dataNodeToBeConverted);
 210         final Builder<FragmentEntity> childFragmentsImmutableSetBuilder = ImmutableSet.builder();
 211         for (final DataNode childDataNode : dataNodeToBeConverted.getChildDataNodes()) {
 212             final FragmentEntity childFragment = convertToFragmentWithAllDescendants(anchorEntity, childDataNode);
 213             childFragmentsImmutableSetBuilder.add(childFragment);
 214         }
 215         parentFragment.setChildFragments(childFragmentsImmutableSetBuilder.build());
 216         return parentFragment;
 217     }
 218
 219     private FragmentEntity toFragmentEntity(final AnchorEntity anchorEntity, final DataNode dataNode) {
 220         return FragmentEntity.builder()
 221                 .dataspace(anchorEntity.getDataspace())
 222                 .anchor(anchorEntity)
 223                 .xpath(dataNode.getXpath())
 224                 .attributes(jsonObjectMapper.asJsonString(dataNode.getLeaves()))
 225                 .build();
 226     }
 227
 228     @Override
 229     @Timed(value = "cps.data.persistence.service.datanode.get",
 230             description = "Time taken to get a data node")
 231     public Collection<DataNode> getDataNodes(final String dataspaceName, final String anchorName,
 232                                              final String xpath,
 233                                              final FetchDescendantsOption fetchDescendantsOption) {
 234         final String targetXpath = getNormalizedXpath(xpath);
 235         final Collection<DataNode> dataNodes = getDataNodesForMultipleXpaths(dataspaceName, anchorName,
 236                 Collections.singletonList(targetXpath), fetchDescendantsOption);
 237         if (dataNodes.isEmpty()) {
 238             throw new DataNodeNotFoundException(dataspaceName, anchorName, xpath);
 239         }
 240         return dataNodes;
 241     }
 242
 243     @Override
 244     @Timed(value = "cps.data.persistence.service.datanode.batch.get",
 245             description = "Time taken to get data nodes")
 246     public Collection<DataNode> getDataNodesForMultipleXpaths(final String dataspaceName, final String anchorName,
 247                                                               final Collection<String> xpaths,
 248                                                               final FetchDescendantsOption fetchDescendantsOption) {
 249         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 250         final Collection<FragmentEntity> fragmentEntities =
 251             getFragmentEntities(anchorEntity, xpaths, fetchDescendantsOption);
 252         return toDataNodes(fragmentEntities, fetchDescendantsOption);
 253     }
 254
 255     private Collection<FragmentEntity> getFragmentEntities(final AnchorEntity anchorEntity,
 256                                                            final Collection<String> xpaths,
 257                                                            final FetchDescendantsOption fetchDescendantsOption) {
 258         final Collection<String> nonRootXpaths = new HashSet<>(xpaths);
 259         final boolean haveRootXpath = nonRootXpaths.removeIf(CpsDataPersistenceServiceImpl::isRootXpath);
 260
 261         final Collection<String> normalizedXpaths = new HashSet<>(nonRootXpaths.size());
 262         for (final String xpath : nonRootXpaths) {
 263             try {
 264                 normalizedXpaths.add(CpsPathUtil.getNormalizedXpath(xpath));
 265             } catch (final PathParsingException e) {
 266                 log.warn("Error parsing xpath \"{}\": {}", xpath, e.getMessage());
 267             }
 268         }
 269         if (haveRootXpath) {
 270             normalizedXpaths.addAll(fragmentRepository.findAllXpathByAnchorAndParentIdIsNull(anchorEntity));
 271         }
 272
 273         final List<FragmentExtract> fragmentExtracts =
 274             fragmentRepository.findExtractsWithDescendants(anchorEntity.getId(), normalizedXpaths,
 275                 fetchDescendantsOption.getDepth());
 276
 277         return FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
 278     }
 279
 280     private FragmentEntity getFragmentEntity(final AnchorEntity anchorEntity, final String xpath) {
 281         final FragmentEntity fragmentEntity;
 282         if (isRootXpath(xpath)) {
 283             final List<FragmentExtract> fragmentExtracts = fragmentRepository.findAllExtractsByAnchor(anchorEntity);
 284             fragmentEntity = FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts)
 285                 .stream().findFirst().orElse(null);
 286         } else {
 287             fragmentEntity = fragmentRepository.getByAnchorAndXpath(anchorEntity, getNormalizedXpath(xpath));
 288         }
 289         if (fragmentEntity == null) {
 290             throw new DataNodeNotFoundException(anchorEntity.getDataspace().getName(), anchorEntity.getName(), xpath);
 291         }
 292         return fragmentEntity;
 293     }
 294
 295     @Override
 296     @Timed(value = "cps.data.persistence.service.datanode.query",
 297             description = "Time taken to query data nodes")
 298     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
 299                                          final FetchDescendantsOption fetchDescendantsOption) {
 300         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 301         final AnchorEntity anchorEntity = Strings.isNullOrEmpty(anchorName) ? ALL_ANCHORS
 302             : anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 303         final CpsPathQuery cpsPathQuery;
 304         try {
 305             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 306         } catch (final PathParsingException e) {
 307             throw new CpsPathException(e.getMessage());
 308         }
 309
 310         Collection<FragmentEntity> fragmentEntities;
 311         if (anchorEntity == ALL_ANCHORS) {
 312             fragmentEntities = fragmentRepository.findByDataspaceAndCpsPath(dataspaceEntity, cpsPathQuery);
 313         } else {
 314             fragmentEntities = fragmentRepository.findByAnchorAndCpsPath(anchorEntity, cpsPathQuery);
 315         }
 316         if (cpsPathQuery.hasAncestorAxis()) {
 317             final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 318             if (anchorEntity == ALL_ANCHORS) {
 319                 fragmentEntities = fragmentRepository.findByDataspaceAndXpathIn(dataspaceEntity, ancestorXpaths);
 320             } else {
 321                 fragmentEntities = fragmentRepository.findByAnchorAndXpathIn(anchorEntity, ancestorXpaths);
 322             }
 323         }
 324         fragmentEntities = prefetchDescendantsForFragmentEntities(fetchDescendantsOption, anchorEntity,
 325             fragmentEntities);
 326         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 327     }
 328
 329     @Override
 330     public List<DataNode> queryDataNodesAcrossAnchors(final String dataspaceName, final String cpsPath,
 331                                                       final FetchDescendantsOption fetchDescendantsOption) {
 332         return queryDataNodes(dataspaceName, QUERY_ACROSS_ANCHORS, cpsPath, fetchDescendantsOption);
 333     }
 334
 335     private Collection<FragmentEntity> prefetchDescendantsForFragmentEntities(
 336                                             final FetchDescendantsOption fetchDescendantsOption,
 337                                             final AnchorEntity anchorEntity,
 338                                             final Collection<FragmentEntity> proxiedFragmentEntities) {
 339         if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
 340             return proxiedFragmentEntities;
 341         }
 342
 343         final List<Long> fragmentEntityIds = proxiedFragmentEntities.stream()
 344             .map(FragmentEntity::getId).collect(Collectors.toList());
 345
 346         final List<FragmentExtract> fragmentExtracts =
 347             fragmentRepository.findExtractsWithDescendantsByIds(fragmentEntityIds, fetchDescendantsOption.getDepth());
 348
 349         if (anchorEntity == ALL_ANCHORS) {
 350             final Collection<Integer> anchorIds = fragmentExtracts.stream()
 351                 .map(FragmentExtract::getAnchorId).collect(Collectors.toSet());
 352             final List<AnchorEntity> anchorEntities = anchorRepository.findAllById(anchorIds);
 353             final Map<Integer, AnchorEntity> anchorEntityPerId = anchorEntities.stream()
 354                 .collect(Collectors.toMap(AnchorEntity::getId, Function.identity()));
 355             return FragmentEntityArranger.toFragmentEntityTreesAcrossAnchors(anchorEntityPerId, fragmentExtracts);
 356         }
 357         return FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
 358     }
 359
 360     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 361                                                                final Collection<FragmentEntity> fragmentEntities) {
 362         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 363         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 364             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 365         }
 366         return Collections.unmodifiableList(dataNodes);
 367     }
 368
 369     private static String getNormalizedXpath(final String xpathSource) {
 370         if (isRootXpath(xpathSource)) {
 371             return xpathSource;
 372         }
 373         try {
 374             return CpsPathUtil.getNormalizedXpath(xpathSource);
 375         } catch (final PathParsingException e) {
 376             throw new CpsPathException(e.getMessage());
 377         }
 378     }
 379
 380     @Override
 381     public String startSession() {
 382         return sessionManager.startSession();
 383     }
 384
 385     @Override
 386     public void closeSession(final String sessionId) {
 387         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 388     }
 389
 390     @Override
 391     public void lockAnchor(final String sessionId, final String dataspaceName,
 392                            final String anchorName, final Long timeoutInMilliseconds) {
 393         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 394     }
 395
 396     private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
 397                                                     final CpsPathQuery cpsPathQuery) {
 398         final Set<String> ancestorXpath = new HashSet<>();
 399         final Pattern pattern =
 400                 Pattern.compile("(.*/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 401                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "/.*");
 402         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 403             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 404             if (matcher.matches()) {
 405                 ancestorXpath.add(matcher.group(1));
 406             }
 407         }
 408         return ancestorXpath;
 409     }
 410
 411     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 412                                 final FetchDescendantsOption fetchDescendantsOption) {
 413         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 414         Map<String, Serializable> leaves = new HashMap<>();
 415         if (fragmentEntity.getAttributes() != null) {
 416             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 417         }
 418         return new DataNodeBuilder()
 419                 .withXpath(fragmentEntity.getXpath())
 420                 .withLeaves(leaves)
 421                 .withDataspace(fragmentEntity.getAnchor().getDataspace().getName())
 422                 .withAnchor(fragmentEntity.getAnchor().getName())
 423                 .withChildDataNodes(childDataNodes).build();
 424     }
 425
 426     private Collection<DataNode> toDataNodes(final Collection<FragmentEntity> fragmentEntities,
 427                                              final FetchDescendantsOption fetchDescendantsOption) {
 428         final Collection<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 429         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 430             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 431         }
 432         return dataNodes;
 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                 FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
 453
 454         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 455             final Map<String, Serializable> updatedLeaves = updatedLeavesPerXPath.get(fragmentEntity.getXpath());
 456             final String mergedLeaves = mergeLeaves(updatedLeaves, fragmentEntity.getAttributes());
 457             fragmentEntity.setAttributes(mergedLeaves);
 458         }
 459
 460         try {
 461             fragmentRepository.saveAll(fragmentEntities);
 462         } catch (final StaleStateException staleStateException) {
 463             retryUpdateDataNodesIndividually(anchorEntity, fragmentEntities);
 464         }
 465     }
 466
 467     @Override
 468     public void updateDataNodesAndDescendants(final String dataspaceName, final String anchorName,
 469                                               final Collection<DataNode> updatedDataNodes) {
 470         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 471
 472         final Map<String, DataNode> xpathToUpdatedDataNode = updatedDataNodes.stream()
 473             .collect(Collectors.toMap(DataNode::getXpath, dataNode -> dataNode));
 474
 475         final Collection<String> xpaths = xpathToUpdatedDataNode.keySet();
 476         final Collection<FragmentEntity> existingFragmentEntities =
 477             getFragmentEntities(anchorEntity, xpaths, FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
 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 = currentLeavesAsString.isEmpty()
 697                     ? new HashMap<>() : jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
 698             currentLeavesAsMap.putAll(updateLeaves);
 699         }
 700
 701         if (currentLeavesAsMap.isEmpty()) {
 702             return "";
 703         }
 704         return jsonObjectMapper.asJsonString(currentLeavesAsMap);
 705     }
 706
 707     private AnchorEntity getAnchorEntity(final String dataspaceName, final String anchorName) {
 708         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 709         return anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 710     }
 711 }