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