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.regex.Matcher;
  40 import java.util.regex.Pattern;
  41 import java.util.stream.Collectors;
  42 import javax.transaction.Transactional;
  43 import lombok.RequiredArgsConstructor;
  44 import lombok.extern.slf4j.Slf4j;
  45 import org.hibernate.StaleStateException;
  46 import org.onap.cps.cpspath.parser.CpsPathQuery;
  47 import org.onap.cps.cpspath.parser.CpsPathUtil;
  48 import org.onap.cps.cpspath.parser.PathParsingException;
  49 import org.onap.cps.spi.CpsDataPersistenceService;
  50 import org.onap.cps.spi.FetchDescendantsOption;
  51 import org.onap.cps.spi.entities.AnchorEntity;
  52 import org.onap.cps.spi.entities.DataspaceEntity;
  53 import org.onap.cps.spi.entities.FragmentEntity;
  54 import org.onap.cps.spi.exceptions.AlreadyDefinedException;
  55 import org.onap.cps.spi.exceptions.ConcurrencyException;
  56 import org.onap.cps.spi.exceptions.CpsAdminException;
  57 import org.onap.cps.spi.exceptions.CpsPathException;
  58 import org.onap.cps.spi.exceptions.DataNodeNotFoundException;
  59 import org.onap.cps.spi.exceptions.DataNodeNotFoundExceptionBatch;
  60 import org.onap.cps.spi.model.DataNode;
  61 import org.onap.cps.spi.model.DataNodeBuilder;
  62 import org.onap.cps.spi.repository.AnchorRepository;
  63 import org.onap.cps.spi.repository.DataspaceRepository;
  64 import org.onap.cps.spi.repository.FragmentRepository;
  65 import org.onap.cps.spi.utils.SessionManager;
  66 import org.onap.cps.utils.JsonObjectMapper;
  67 import org.springframework.dao.DataIntegrityViolationException;
  68 import org.springframework.stereotype.Service;
  69
  70 @Service
  71 @Slf4j
  72 @RequiredArgsConstructor
  73 public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService {
  74
  75     private final DataspaceRepository dataspaceRepository;
  76     private final AnchorRepository anchorRepository;
  77     private final FragmentRepository fragmentRepository;
  78     private final JsonObjectMapper jsonObjectMapper;
  79     private final SessionManager sessionManager;
  80
  81     private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@.+?])?)";
  82     private static final String QUERY_ACROSS_ANCHORS = null;
  83     private static final AnchorEntity ALL_ANCHORS = null;
  84
  85     @Override
  86     public void addChildDataNodes(final String dataspaceName, final String anchorName,
  87                                   final String parentNodeXpath, final Collection<DataNode> dataNodes) {
  88         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
  89         addChildrenDataNodes(anchorEntity, parentNodeXpath, dataNodes);
  90     }
  91
  92     @Override
  93     public void addListElements(final String dataspaceName, final String anchorName, final String parentNodeXpath,
  94                                 final Collection<DataNode> newListElements) {
  95         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
  96         addChildrenDataNodes(anchorEntity, parentNodeXpath, newListElements);
  97     }
  98
  99     @Override
 100     public void addMultipleLists(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 101                                  final Collection<Collection<DataNode>> newLists) {
 102         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 103         final Collection<String> failedXpaths = new HashSet<>();
 104         for (final Collection<DataNode> newList : newLists) {
 105             try {
 106                 addChildrenDataNodes(anchorEntity, parentNodeXpath, newList);
 107             } catch (final AlreadyDefinedException alreadyDefinedException) {
 108                 failedXpaths.addAll(alreadyDefinedException.getAlreadyDefinedObjectNames());
 109             }
 110         }
 111         if (!failedXpaths.isEmpty()) {
 112             throw AlreadyDefinedException.forDataNodes(failedXpaths, anchorEntity.getName());
 113         }
 114     }
 115
 116     private void addNewChildDataNode(final AnchorEntity anchorEntity, final String parentNodeXpath,
 117                                      final DataNode newChild) {
 118         final FragmentEntity parentFragmentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 119         final FragmentEntity newChildAsFragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, newChild);
 120         newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 121         try {
 122             fragmentRepository.save(newChildAsFragmentEntity);
 123         } catch (final DataIntegrityViolationException dataIntegrityViolationException) {
 124             throw AlreadyDefinedException.forDataNodes(Collections.singletonList(newChild.getXpath()),
 125                     anchorEntity.getName());
 126         }
 127     }
 128
 129     private void addChildrenDataNodes(final AnchorEntity anchorEntity, final String parentNodeXpath,
 130                                       final Collection<DataNode> newChildren) {
 131         final FragmentEntity parentFragmentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 132         final List<FragmentEntity> fragmentEntities = new ArrayList<>(newChildren.size());
 133         try {
 134             for (final DataNode newChildAsDataNode : newChildren) {
 135                 final FragmentEntity newChildAsFragmentEntity =
 136                     convertToFragmentWithAllDescendants(anchorEntity, newChildAsDataNode);
 137                 newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 138                 fragmentEntities.add(newChildAsFragmentEntity);
 139             }
 140             fragmentRepository.saveAll(fragmentEntities);
 141         } catch (final DataIntegrityViolationException dataIntegrityViolationException) {
 142             log.warn("Exception occurred : {} , While saving : {} children, retrying using individual save operations",
 143                     dataIntegrityViolationException, fragmentEntities.size());
 144             retrySavingEachChildIndividually(anchorEntity, parentNodeXpath, newChildren);
 145         }
 146     }
 147
 148     private void retrySavingEachChildIndividually(final AnchorEntity anchorEntity, final String parentNodeXpath,
 149                                                   final Collection<DataNode> newChildren) {
 150         final Collection<String> failedXpaths = new HashSet<>();
 151         for (final DataNode newChild : newChildren) {
 152             try {
 153                 addNewChildDataNode(anchorEntity, parentNodeXpath, newChild);
 154             } catch (final AlreadyDefinedException alreadyDefinedException) {
 155                 failedXpaths.add(newChild.getXpath());
 156             }
 157         }
 158         if (!failedXpaths.isEmpty()) {
 159             throw AlreadyDefinedException.forDataNodes(failedXpaths, anchorEntity.getName());
 160         }
 161     }
 162
 163     @Override
 164     public void storeDataNodes(final String dataspaceName, final String anchorName,
 165                                final Collection<DataNode> dataNodes) {
 166         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 167         final List<FragmentEntity> fragmentEntities = new ArrayList<>(dataNodes.size());
 168         try {
 169             for (final DataNode dataNode: dataNodes) {
 170                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, dataNode);
 171                 fragmentEntities.add(fragmentEntity);
 172             }
 173             fragmentRepository.saveAll(fragmentEntities);
 174         } catch (final DataIntegrityViolationException exception) {
 175             log.warn("Exception occurred : {} , While saving : {} data nodes, Retrying saving data nodes individually",
 176                     exception, dataNodes.size());
 177             storeDataNodesIndividually(anchorEntity, dataNodes);
 178         }
 179     }
 180
 181     private void storeDataNodesIndividually(final AnchorEntity anchorEntity, final Collection<DataNode> dataNodes) {
 182         final Collection<String> failedXpaths = new HashSet<>();
 183         for (final DataNode dataNode: dataNodes) {
 184             try {
 185                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(anchorEntity, dataNode);
 186                 fragmentRepository.save(fragmentEntity);
 187             } catch (final DataIntegrityViolationException dataIntegrityViolationException) {
 188                 failedXpaths.add(dataNode.getXpath());
 189             }
 190         }
 191         if (!failedXpaths.isEmpty()) {
 192             throw AlreadyDefinedException.forDataNodes(failedXpaths, anchorEntity.getName());
 193         }
 194     }
 195
 196     /**
 197      * Convert DataNode object into Fragment and places the result in the fragments placeholder. Performs same action
 198      * for all DataNode children recursively.
 199      *
 200      * @param anchorEntity          anchorEntity
 201      * @param dataNodeToBeConverted dataNode
 202      * @return a Fragment built from current DataNode
 203      */
 204     private FragmentEntity convertToFragmentWithAllDescendants(final AnchorEntity anchorEntity,
 205                                                                final DataNode dataNodeToBeConverted) {
 206         final FragmentEntity parentFragment = toFragmentEntity(anchorEntity, dataNodeToBeConverted);
 207         final Builder<FragmentEntity> childFragmentsImmutableSetBuilder = ImmutableSet.builder();
 208         for (final DataNode childDataNode : dataNodeToBeConverted.getChildDataNodes()) {
 209             final FragmentEntity childFragment = convertToFragmentWithAllDescendants(anchorEntity, childDataNode);
 210             childFragmentsImmutableSetBuilder.add(childFragment);
 211         }
 212         parentFragment.setChildFragments(childFragmentsImmutableSetBuilder.build());
 213         return parentFragment;
 214     }
 215
 216     private FragmentEntity toFragmentEntity(final AnchorEntity anchorEntity, final DataNode dataNode) {
 217         return FragmentEntity.builder()
 218                 .anchor(anchorEntity)
 219                 .xpath(dataNode.getXpath())
 220                 .attributes(jsonObjectMapper.asJsonString(dataNode.getLeaves()))
 221                 .build();
 222     }
 223
 224     @Override
 225     @Timed(value = "cps.data.persistence.service.datanode.get",
 226             description = "Time taken to get a data node")
 227     public Collection<DataNode> getDataNodes(final String dataspaceName, final String anchorName,
 228                                              final String xpath,
 229                                              final FetchDescendantsOption fetchDescendantsOption) {
 230         final String targetXpath = getNormalizedXpath(xpath);
 231         final Collection<DataNode> dataNodes = getDataNodesForMultipleXpaths(dataspaceName, anchorName,
 232                 Collections.singletonList(targetXpath), fetchDescendantsOption);
 233         if (dataNodes.isEmpty()) {
 234             throw new DataNodeNotFoundException(dataspaceName, anchorName, xpath);
 235         }
 236         return dataNodes;
 237     }
 238
 239     @Override
 240     @Timed(value = "cps.data.persistence.service.datanode.batch.get",
 241             description = "Time taken to get data nodes")
 242     public Collection<DataNode> getDataNodesForMultipleXpaths(final String dataspaceName, final String anchorName,
 243                                                               final Collection<String> xpaths,
 244                                                               final FetchDescendantsOption fetchDescendantsOption) {
 245         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 246         Collection<FragmentEntity> fragmentEntities = getFragmentEntities(anchorEntity, xpaths);
 247         fragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(fetchDescendantsOption,
 248                 fragmentEntities);
 249         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 250     }
 251
 252     private Collection<FragmentEntity> getFragmentEntities(final AnchorEntity anchorEntity,
 253                                                            final Collection<String> xpaths) {
 254         final Collection<String> normalizedXpaths = getNormalizedXpaths(xpaths);
 255
 256         final boolean haveRootXpath = normalizedXpaths.removeIf(CpsDataPersistenceServiceImpl::isRootXpath);
 257
 258         final List<FragmentEntity> fragmentEntities = fragmentRepository.findByAnchorAndXpathIn(anchorEntity,
 259                 normalizedXpaths);
 260
 261         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 262             normalizedXpaths.remove(fragmentEntity.getXpath());
 263         }
 264
 265         for (final String xpath : normalizedXpaths) {
 266             if (!CpsPathUtil.isPathToListElement(xpath)) {
 267                 fragmentEntities.addAll(fragmentRepository.findListByAnchorAndXpath(anchorEntity, xpath));
 268             }
 269         }
 270
 271         if (haveRootXpath) {
 272             fragmentEntities.addAll(fragmentRepository.findRootsByAnchorId(anchorEntity.getId()));
 273         }
 274
 275         return fragmentEntities;
 276     }
 277
 278     private FragmentEntity getFragmentEntity(final AnchorEntity anchorEntity, final String xpath) {
 279         final FragmentEntity fragmentEntity;
 280         if (isRootXpath(xpath)) {
 281             fragmentEntity = fragmentRepository.findOneByAnchorId(anchorEntity.getId()).orElse(null);
 282         } else {
 283             fragmentEntity = fragmentRepository.getByAnchorAndXpath(anchorEntity, getNormalizedXpath(xpath));
 284         }
 285         if (fragmentEntity == null) {
 286             throw new DataNodeNotFoundException(anchorEntity.getDataspace().getName(), anchorEntity.getName(), xpath);
 287         }
 288         return fragmentEntity;
 289     }
 290
 291     @Override
 292     @Timed(value = "cps.data.persistence.service.datanode.query",
 293             description = "Time taken to query data nodes")
 294     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
 295                                          final FetchDescendantsOption fetchDescendantsOption) {
 296         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 297         final AnchorEntity anchorEntity = Strings.isNullOrEmpty(anchorName) ? ALL_ANCHORS
 298             : anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 299         final CpsPathQuery cpsPathQuery;
 300         try {
 301             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 302         } catch (final PathParsingException pathParsingException) {
 303             throw new CpsPathException(pathParsingException.getMessage());
 304         }
 305
 306         Collection<FragmentEntity> fragmentEntities;
 307         if (anchorEntity == ALL_ANCHORS) {
 308             fragmentEntities = fragmentRepository.findByDataspaceAndCpsPath(dataspaceEntity, cpsPathQuery);
 309         } else {
 310             fragmentEntities = fragmentRepository.findByAnchorAndCpsPath(anchorEntity, cpsPathQuery);
 311         }
 312         if (cpsPathQuery.hasAncestorAxis()) {
 313             final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 314             if (anchorEntity == ALL_ANCHORS) {
 315                 fragmentEntities = fragmentRepository.findByDataspaceAndXpathIn(dataspaceEntity, ancestorXpaths);
 316             } else {
 317                 fragmentEntities = fragmentRepository.findByAnchorAndXpathIn(anchorEntity, ancestorXpaths);
 318             }
 319         }
 320         fragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(fetchDescendantsOption,
 321                 fragmentEntities);
 322         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 323     }
 324
 325     @Override
 326     public List<DataNode> queryDataNodesAcrossAnchors(final String dataspaceName, final String cpsPath,
 327                                                       final FetchDescendantsOption fetchDescendantsOption) {
 328         return queryDataNodes(dataspaceName, QUERY_ACROSS_ANCHORS, cpsPath, fetchDescendantsOption);
 329     }
 330
 331     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 332                                                                final Collection<FragmentEntity> fragmentEntities) {
 333         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 334         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 335             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 336         }
 337         return Collections.unmodifiableList(dataNodes);
 338     }
 339
 340     private static String getNormalizedXpath(final String xpathSource) {
 341         if (isRootXpath(xpathSource)) {
 342             return xpathSource;
 343         }
 344         try {
 345             return CpsPathUtil.getNormalizedXpath(xpathSource);
 346         } catch (final PathParsingException pathParsingException) {
 347             throw new CpsPathException(pathParsingException.getMessage());
 348         }
 349     }
 350
 351     private static Collection<String> getNormalizedXpaths(final Collection<String> xpaths) {
 352         final Collection<String> normalizedXpaths = new HashSet<>(xpaths.size());
 353         for (final String xpath : xpaths) {
 354             try {
 355                 normalizedXpaths.add(getNormalizedXpath(xpath));
 356             } catch (final CpsPathException cpsPathException) {
 357                 log.warn("Error parsing xpath \"{}\": {}", xpath, cpsPathException.getMessage());
 358             }
 359         }
 360         return normalizedXpaths;
 361     }
 362
 363     @Override
 364     public String startSession() {
 365         return sessionManager.startSession();
 366     }
 367
 368     @Override
 369     public void closeSession(final String sessionId) {
 370         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 371     }
 372
 373     @Override
 374     public void lockAnchor(final String sessionId, final String dataspaceName,
 375                            final String anchorName, final Long timeoutInMilliseconds) {
 376         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 377     }
 378
 379     private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
 380                                                     final CpsPathQuery cpsPathQuery) {
 381         final Set<String> ancestorXpath = new HashSet<>();
 382         final Pattern pattern =
 383                 Pattern.compile("(.*/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 384                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "/.*");
 385         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 386             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 387             if (matcher.matches()) {
 388                 ancestorXpath.add(matcher.group(1));
 389             }
 390         }
 391         return ancestorXpath;
 392     }
 393
 394     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 395                                 final FetchDescendantsOption fetchDescendantsOption) {
 396         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 397         Map<String, Serializable> leaves = new HashMap<>();
 398         if (fragmentEntity.getAttributes() != null) {
 399             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 400         }
 401         return new DataNodeBuilder()
 402                 .withXpath(fragmentEntity.getXpath())
 403                 .withLeaves(leaves)
 404                 .withDataspace(fragmentEntity.getAnchor().getDataspace().getName())
 405                 .withAnchor(fragmentEntity.getAnchor().getName())
 406                 .withChildDataNodes(childDataNodes).build();
 407     }
 408
 409     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
 410                                              final FetchDescendantsOption fetchDescendantsOption) {
 411         if (fetchDescendantsOption.hasNext()) {
 412             return fragmentEntity.getChildFragments().stream()
 413                     .map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
 414                     .collect(Collectors.toList());
 415         }
 416         return Collections.emptyList();
 417     }
 418
 419     @Override
 420     public void batchUpdateDataLeaves(final String dataspaceName, final String anchorName,
 421                                         final Map<String, Map<String, Serializable>> updatedLeavesPerXPath) {
 422         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 423
 424         final Collection<String> xpathsOfUpdatedLeaves = updatedLeavesPerXPath.keySet();
 425         final Collection<FragmentEntity> fragmentEntities = getFragmentEntities(anchorEntity, xpathsOfUpdatedLeaves);
 426
 427         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 428             final Map<String, Serializable> updatedLeaves = updatedLeavesPerXPath.get(fragmentEntity.getXpath());
 429             final String mergedLeaves = mergeLeaves(updatedLeaves, fragmentEntity.getAttributes());
 430             fragmentEntity.setAttributes(mergedLeaves);
 431         }
 432
 433         try {
 434             fragmentRepository.saveAll(fragmentEntities);
 435         } catch (final StaleStateException staleStateException) {
 436             retryUpdateDataNodesIndividually(anchorEntity, fragmentEntities);
 437         }
 438     }
 439
 440     @Override
 441     public void updateDataNodesAndDescendants(final String dataspaceName, final String anchorName,
 442                                               final Collection<DataNode> updatedDataNodes) {
 443         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 444
 445         final Map<String, DataNode> xpathToUpdatedDataNode = updatedDataNodes.stream()
 446             .collect(Collectors.toMap(DataNode::getXpath, dataNode -> dataNode));
 447
 448         final Collection<String> xpaths = xpathToUpdatedDataNode.keySet();
 449         Collection<FragmentEntity> existingFragmentEntities = getFragmentEntities(anchorEntity, xpaths);
 450         existingFragmentEntities = fragmentRepository.prefetchDescendantsOfFragmentEntities(
 451                 FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS, existingFragmentEntities);
 452
 453         for (final FragmentEntity existingFragmentEntity : existingFragmentEntities) {
 454             final DataNode updatedDataNode = xpathToUpdatedDataNode.get(existingFragmentEntity.getXpath());
 455             updateFragmentEntityAndDescendantsWithDataNode(existingFragmentEntity, updatedDataNode);
 456         }
 457
 458         try {
 459             fragmentRepository.saveAll(existingFragmentEntities);
 460         } catch (final StaleStateException staleStateException) {
 461             retryUpdateDataNodesIndividually(anchorEntity, existingFragmentEntities);
 462         }
 463     }
 464
 465     private void retryUpdateDataNodesIndividually(final AnchorEntity anchorEntity,
 466                                                   final Collection<FragmentEntity> fragmentEntities) {
 467         final Collection<String> failedXpaths = new HashSet<>();
 468         for (final FragmentEntity dataNodeFragment : fragmentEntities) {
 469             try {
 470                 fragmentRepository.save(dataNodeFragment);
 471             } catch (final StaleStateException staleStateException) {
 472                 failedXpaths.add(dataNodeFragment.getXpath());
 473             }
 474         }
 475         if (!failedXpaths.isEmpty()) {
 476             final String failedXpathsConcatenated = String.join(",", failedXpaths);
 477             throw new ConcurrencyException("Concurrent Transactions", String.format(
 478                     "DataNodes : %s in Dataspace :'%s' with Anchor : '%s'  are updated by another transaction.",
 479                     failedXpathsConcatenated, anchorEntity.getDataspace().getName(), anchorEntity.getName()));
 480         }
 481     }
 482
 483     private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
 484                                                                 final DataNode newDataNode) {
 485         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 486
 487         final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
 488                 .collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
 489
 490         final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
 491         for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
 492             final FragmentEntity childFragment;
 493             if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
 494                 childFragment = convertToFragmentWithAllDescendants(existingFragmentEntity.getAnchor(),
 495                     newDataNodeChild);
 496             } else {
 497                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
 498                 updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
 499             }
 500             updatedChildFragments.add(childFragment);
 501         }
 502
 503         existingFragmentEntity.getChildFragments().clear();
 504         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
 505     }
 506
 507     @Override
 508     @Transactional
 509     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 510                                    final Collection<DataNode> newListElements) {
 511         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 512         final FragmentEntity parentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 513         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
 514         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
 515                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
 516         parentEntity.getChildFragments().removeAll(existingListElementFragmentEntitiesByXPath.values());
 517         final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
 518         for (final DataNode newListElement : newListElements) {
 519             final FragmentEntity existingListElementEntity =
 520                     existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
 521             final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
 522                     existingListElementEntity);
 523             updatedChildFragmentEntities.add(entityToBeAdded);
 524         }
 525         parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
 526         fragmentRepository.save(parentEntity);
 527     }
 528
 529     @Override
 530     @Transactional
 531     public void deleteDataNodes(final String dataspaceName, final String anchorName) {
 532         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 533         anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
 534             .ifPresent(anchorEntity -> fragmentRepository.deleteByAnchorIn(Collections.singletonList(anchorEntity)));
 535     }
 536
 537     @Override
 538     @Transactional
 539     public void deleteDataNodes(final String dataspaceName, final Collection<String> anchorNames) {
 540         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 541         final Collection<AnchorEntity> anchorEntities =
 542             anchorRepository.findAllByDataspaceAndNameIn(dataspaceEntity, anchorNames);
 543         fragmentRepository.deleteByAnchorIn(anchorEntities);
 544     }
 545
 546     @Override
 547     @Transactional
 548     public void deleteDataNodes(final String dataspaceName, final String anchorName,
 549                                 final Collection<String> xpathsToDelete) {
 550         deleteDataNodes(dataspaceName, anchorName, xpathsToDelete, false);
 551     }
 552
 553     private void deleteDataNodes(final String dataspaceName, final String anchorName,
 554                                  final Collection<String> xpathsToDelete, final boolean onlySupportListDeletion) {
 555         final boolean haveRootXpath = xpathsToDelete.stream().anyMatch(CpsDataPersistenceServiceImpl::isRootXpath);
 556         if (haveRootXpath) {
 557             deleteDataNodes(dataspaceName, anchorName);
 558             return;
 559         }
 560
 561         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 562
 563         final Collection<String> deleteChecklist = getNormalizedXpaths(xpathsToDelete);
 564         final Collection<String> xpathsToExistingContainers =
 565             fragmentRepository.findAllXpathByAnchorAndXpathIn(anchorEntity, deleteChecklist);
 566         if (onlySupportListDeletion) {
 567             final Collection<String> xpathsToExistingListElements = xpathsToExistingContainers.stream()
 568                 .filter(CpsPathUtil::isPathToListElement).collect(Collectors.toList());
 569             deleteChecklist.removeAll(xpathsToExistingListElements);
 570         } else {
 571             deleteChecklist.removeAll(xpathsToExistingContainers);
 572         }
 573
 574         final Collection<String> xpathsToExistingLists = deleteChecklist.stream()
 575             .filter(xpath -> fragmentRepository.existsByAnchorAndXpathStartsWith(anchorEntity, xpath + "["))
 576             .collect(Collectors.toList());
 577         deleteChecklist.removeAll(xpathsToExistingLists);
 578
 579         if (!deleteChecklist.isEmpty()) {
 580             throw new DataNodeNotFoundExceptionBatch(dataspaceName, anchorName, deleteChecklist);
 581         }
 582
 583         fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingContainers);
 584         fragmentRepository.deleteListsByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingLists);
 585     }
 586
 587     @Override
 588     @Transactional
 589     public void deleteListDataNode(final String dataspaceName, final String anchorName,
 590                                    final String targetXpath) {
 591         deleteDataNode(dataspaceName, anchorName, targetXpath, true);
 592     }
 593
 594     @Override
 595     @Transactional
 596     public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
 597         deleteDataNode(dataspaceName, anchorName, targetXpath, false);
 598     }
 599
 600     private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
 601                                 final boolean onlySupportListNodeDeletion) {
 602         final String normalizedXpath = getNormalizedXpath(targetXpath);
 603         try {
 604             deleteDataNodes(dataspaceName, anchorName, Collections.singletonList(normalizedXpath),
 605                 onlySupportListNodeDeletion);
 606         } catch (final DataNodeNotFoundExceptionBatch dataNodeNotFoundExceptionBatch) {
 607             throw new DataNodeNotFoundException(dataspaceName, anchorName, targetXpath);
 608         }
 609     }
 610
 611     private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
 612         if (newListElements.isEmpty()) {
 613             throw new CpsAdminException("Invalid list replacement",
 614                     "Cannot replace list elements with empty collection");
 615         }
 616         final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
 617         return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
 618     }
 619
 620     private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
 621                                                      final DataNode newListElement,
 622                                                      final FragmentEntity existingListElementEntity) {
 623         if (existingListElementEntity == null) {
 624             return convertToFragmentWithAllDescendants(parentEntity.getAnchor(), newListElement);
 625         }
 626         if (newListElement.getChildDataNodes().isEmpty()) {
 627             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
 628             existingListElementEntity.getChildFragments().clear();
 629         } else {
 630             updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
 631         }
 632         return existingListElementEntity;
 633     }
 634
 635     private static boolean isNewDataNode(final DataNode replacementDataNode,
 636                                          final Map<String, FragmentEntity> existingListElementsByXpath) {
 637         return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
 638     }
 639
 640     private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
 641                                                   final DataNode newListElement) {
 642         final FragmentEntity replacementFragmentEntity =
 643                 FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
 644                         newListElement.getLeaves())).build();
 645         existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
 646     }
 647
 648     private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
 649             final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
 650         return childEntities.stream()
 651                 .filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
 652                 .collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
 653     }
 654
 655     private static boolean isRootXpath(final String xpath) {
 656         return "/".equals(xpath) || "".equals(xpath);
 657     }
 658
 659     private String mergeLeaves(final Map<String, Serializable> updateLeaves, final String currentLeavesAsString) {
 660         Map<String, Serializable> currentLeavesAsMap = new HashMap<>();
 661         if (currentLeavesAsString != null) {
 662             currentLeavesAsMap = jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
 663             currentLeavesAsMap.putAll(updateLeaves);
 664         }
 665
 666         if (currentLeavesAsMap.isEmpty()) {
 667             return "";
 668         }
 669         return jsonObjectMapper.asJsonString(currentLeavesAsMap);
 670     }
 671
 672     private AnchorEntity getAnchorEntity(final String dataspaceName, final String anchorName) {
 673         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 674         return anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 675     }
 676 }