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                 .anchor(anchorEntity)
 222                 .xpath(dataNode.getXpath())
 223                 .attributes(jsonObjectMapper.asJsonString(dataNode.getLeaves()))
 224                 .build();
 225     }
 226
 227     @Override
 228     @Timed(value = "cps.data.persistence.service.datanode.get",
 229             description = "Time taken to get a data node")
 230     public Collection<DataNode> getDataNodes(final String dataspaceName, final String anchorName,
 231                                              final String xpath,
 232                                              final FetchDescendantsOption fetchDescendantsOption) {
 233         final String targetXpath = getNormalizedXpath(xpath);
 234         final Collection<DataNode> dataNodes = getDataNodesForMultipleXpaths(dataspaceName, anchorName,
 235                 Collections.singletonList(targetXpath), fetchDescendantsOption);
 236         if (dataNodes.isEmpty()) {
 237             throw new DataNodeNotFoundException(dataspaceName, anchorName, xpath);
 238         }
 239         return dataNodes;
 240     }
 241
 242     @Override
 243     @Timed(value = "cps.data.persistence.service.datanode.batch.get",
 244             description = "Time taken to get data nodes")
 245     public Collection<DataNode> getDataNodesForMultipleXpaths(final String dataspaceName, final String anchorName,
 246                                                               final Collection<String> xpaths,
 247                                                               final FetchDescendantsOption fetchDescendantsOption) {
 248         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 249         final Collection<FragmentEntity> fragmentEntities =
 250             getFragmentEntities(anchorEntity, xpaths, fetchDescendantsOption);
 251         return toDataNodes(fragmentEntities, fetchDescendantsOption);
 252     }
 253
 254     private Collection<FragmentEntity> getFragmentEntities(final AnchorEntity anchorEntity,
 255                                                            final Collection<String> xpaths,
 256                                                            final FetchDescendantsOption fetchDescendantsOption) {
 257         final Collection<String> nonRootXpaths = new HashSet<>(xpaths);
 258         final boolean haveRootXpath = nonRootXpaths.removeIf(CpsDataPersistenceServiceImpl::isRootXpath);
 259
 260         final Collection<String> normalizedXpaths = new HashSet<>(nonRootXpaths.size());
 261         for (final String xpath : nonRootXpaths) {
 262             try {
 263                 normalizedXpaths.add(CpsPathUtil.getNormalizedXpath(xpath));
 264             } catch (final PathParsingException e) {
 265                 log.warn("Error parsing xpath \"{}\": {}", xpath, e.getMessage());
 266             }
 267         }
 268         if (haveRootXpath) {
 269             normalizedXpaths.addAll(fragmentRepository.findAllXpathByAnchorAndParentIdIsNull(anchorEntity));
 270         }
 271
 272         final List<FragmentExtract> fragmentExtracts =
 273             fragmentRepository.findExtractsWithDescendants(anchorEntity.getId(), normalizedXpaths,
 274                 fetchDescendantsOption.getDepth());
 275
 276         return FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
 277     }
 278
 279     private FragmentEntity getFragmentEntity(final AnchorEntity anchorEntity, final String xpath) {
 280         final FragmentEntity fragmentEntity;
 281         if (isRootXpath(xpath)) {
 282             final List<FragmentExtract> fragmentExtracts = fragmentRepository.findAllExtractsByAnchor(anchorEntity);
 283             fragmentEntity = FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts)
 284                 .stream().findFirst().orElse(null);
 285         } else {
 286             fragmentEntity = fragmentRepository.getByAnchorAndXpath(anchorEntity, getNormalizedXpath(xpath));
 287         }
 288         if (fragmentEntity == null) {
 289             throw new DataNodeNotFoundException(anchorEntity.getDataspace().getName(), anchorEntity.getName(), xpath);
 290         }
 291         return fragmentEntity;
 292     }
 293
 294     @Override
 295     @Timed(value = "cps.data.persistence.service.datanode.query",
 296             description = "Time taken to query data nodes")
 297     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
 298                                          final FetchDescendantsOption fetchDescendantsOption) {
 299         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 300         final AnchorEntity anchorEntity = Strings.isNullOrEmpty(anchorName) ? ALL_ANCHORS
 301             : anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 302         final CpsPathQuery cpsPathQuery;
 303         try {
 304             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 305         } catch (final PathParsingException e) {
 306             throw new CpsPathException(e.getMessage());
 307         }
 308
 309         Collection<FragmentEntity> fragmentEntities;
 310         if (anchorEntity == ALL_ANCHORS) {
 311             fragmentEntities = fragmentRepository.findByDataspaceAndCpsPath(dataspaceEntity, cpsPathQuery);
 312         } else {
 313             fragmentEntities = fragmentRepository.findByAnchorAndCpsPath(anchorEntity, cpsPathQuery);
 314         }
 315         if (cpsPathQuery.hasAncestorAxis()) {
 316             final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 317             if (anchorEntity == ALL_ANCHORS) {
 318                 fragmentEntities = fragmentRepository.findByDataspaceAndXpathIn(dataspaceEntity, ancestorXpaths);
 319             } else {
 320                 fragmentEntities = fragmentRepository.findByAnchorAndXpathIn(anchorEntity, ancestorXpaths);
 321             }
 322         }
 323         fragmentEntities = prefetchDescendantsForFragmentEntities(fetchDescendantsOption, anchorEntity,
 324             fragmentEntities);
 325         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 326     }
 327
 328     @Override
 329     public List<DataNode> queryDataNodesAcrossAnchors(final String dataspaceName, final String cpsPath,
 330                                                       final FetchDescendantsOption fetchDescendantsOption) {
 331         return queryDataNodes(dataspaceName, QUERY_ACROSS_ANCHORS, cpsPath, fetchDescendantsOption);
 332     }
 333
 334     private Collection<FragmentEntity> prefetchDescendantsForFragmentEntities(
 335                                             final FetchDescendantsOption fetchDescendantsOption,
 336                                             final AnchorEntity anchorEntity,
 337                                             final Collection<FragmentEntity> proxiedFragmentEntities) {
 338         if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
 339             return proxiedFragmentEntities;
 340         }
 341
 342         final List<Long> fragmentEntityIds = proxiedFragmentEntities.stream()
 343             .map(FragmentEntity::getId).collect(Collectors.toList());
 344
 345         final List<FragmentExtract> fragmentExtracts =
 346             fragmentRepository.findExtractsWithDescendantsByIds(fragmentEntityIds, fetchDescendantsOption.getDepth());
 347
 348         if (anchorEntity == ALL_ANCHORS) {
 349             final Collection<Long> anchorIds = fragmentExtracts.stream()
 350                 .map(FragmentExtract::getAnchorId).collect(Collectors.toSet());
 351             final List<AnchorEntity> anchorEntities = anchorRepository.findAllById(anchorIds);
 352             final Map<Long, AnchorEntity> anchorEntityPerId = anchorEntities.stream()
 353                 .collect(Collectors.toMap(AnchorEntity::getId, Function.identity()));
 354             return FragmentEntityArranger.toFragmentEntityTreesAcrossAnchors(anchorEntityPerId, fragmentExtracts);
 355         }
 356         return FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
 357     }
 358
 359     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 360                                                                final Collection<FragmentEntity> fragmentEntities) {
 361         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 362         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 363             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 364         }
 365         return Collections.unmodifiableList(dataNodes);
 366     }
 367
 368     private static String getNormalizedXpath(final String xpathSource) {
 369         if (isRootXpath(xpathSource)) {
 370             return xpathSource;
 371         }
 372         try {
 373             return CpsPathUtil.getNormalizedXpath(xpathSource);
 374         } catch (final PathParsingException e) {
 375             throw new CpsPathException(e.getMessage());
 376         }
 377     }
 378
 379     @Override
 380     public String startSession() {
 381         return sessionManager.startSession();
 382     }
 383
 384     @Override
 385     public void closeSession(final String sessionId) {
 386         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 387     }
 388
 389     @Override
 390     public void lockAnchor(final String sessionId, final String dataspaceName,
 391                            final String anchorName, final Long timeoutInMilliseconds) {
 392         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 393     }
 394
 395     private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
 396                                                     final CpsPathQuery cpsPathQuery) {
 397         final Set<String> ancestorXpath = new HashSet<>();
 398         final Pattern pattern =
 399                 Pattern.compile("(.*/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 400                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "/.*");
 401         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 402             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 403             if (matcher.matches()) {
 404                 ancestorXpath.add(matcher.group(1));
 405             }
 406         }
 407         return ancestorXpath;
 408     }
 409
 410     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 411                                 final FetchDescendantsOption fetchDescendantsOption) {
 412         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 413         Map<String, Serializable> leaves = new HashMap<>();
 414         if (fragmentEntity.getAttributes() != null) {
 415             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 416         }
 417         return new DataNodeBuilder()
 418                 .withXpath(fragmentEntity.getXpath())
 419                 .withLeaves(leaves)
 420                 .withDataspace(fragmentEntity.getAnchor().getDataspace().getName())
 421                 .withAnchor(fragmentEntity.getAnchor().getName())
 422                 .withChildDataNodes(childDataNodes).build();
 423     }
 424
 425     private Collection<DataNode> toDataNodes(final Collection<FragmentEntity> fragmentEntities,
 426                                              final FetchDescendantsOption fetchDescendantsOption) {
 427         final Collection<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 428         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 429             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 430         }
 431         return dataNodes;
 432     }
 433
 434     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
 435                                              final FetchDescendantsOption fetchDescendantsOption) {
 436         if (fetchDescendantsOption.hasNext()) {
 437             return fragmentEntity.getChildFragments().stream()
 438                     .map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
 439                     .collect(Collectors.toList());
 440         }
 441         return Collections.emptyList();
 442     }
 443
 444     @Override
 445     public void batchUpdateDataLeaves(final String dataspaceName, final String anchorName,
 446                                         final Map<String, Map<String, Serializable>> updatedLeavesPerXPath) {
 447         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 448
 449         final Collection<String> xpathsOfUpdatedLeaves = updatedLeavesPerXPath.keySet();
 450         final Collection<FragmentEntity> fragmentEntities = getFragmentEntities(anchorEntity, xpathsOfUpdatedLeaves,
 451                 FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
 452
 453         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 454             final Map<String, Serializable> updatedLeaves = updatedLeavesPerXPath.get(fragmentEntity.getXpath());
 455             final String mergedLeaves = mergeLeaves(updatedLeaves, fragmentEntity.getAttributes());
 456             fragmentEntity.setAttributes(mergedLeaves);
 457         }
 458
 459         try {
 460             fragmentRepository.saveAll(fragmentEntities);
 461         } catch (final StaleStateException staleStateException) {
 462             retryUpdateDataNodesIndividually(anchorEntity, fragmentEntities);
 463         }
 464     }
 465
 466     @Override
 467     public void updateDataNodesAndDescendants(final String dataspaceName, final String anchorName,
 468                                               final Collection<DataNode> updatedDataNodes) {
 469         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 470
 471         final Map<String, DataNode> xpathToUpdatedDataNode = updatedDataNodes.stream()
 472             .collect(Collectors.toMap(DataNode::getXpath, dataNode -> dataNode));
 473
 474         final Collection<String> xpaths = xpathToUpdatedDataNode.keySet();
 475         final Collection<FragmentEntity> existingFragmentEntities =
 476             getFragmentEntities(anchorEntity, xpaths, FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
 477
 478         for (final FragmentEntity existingFragmentEntity : existingFragmentEntities) {
 479             final DataNode updatedDataNode = xpathToUpdatedDataNode.get(existingFragmentEntity.getXpath());
 480             updateFragmentEntityAndDescendantsWithDataNode(existingFragmentEntity, updatedDataNode);
 481         }
 482
 483         try {
 484             fragmentRepository.saveAll(existingFragmentEntities);
 485         } catch (final StaleStateException staleStateException) {
 486             retryUpdateDataNodesIndividually(anchorEntity, existingFragmentEntities);
 487         }
 488     }
 489
 490     private void retryUpdateDataNodesIndividually(final AnchorEntity anchorEntity,
 491                                                   final Collection<FragmentEntity> fragmentEntities) {
 492         final Collection<String> failedXpaths = new HashSet<>();
 493         for (final FragmentEntity dataNodeFragment : fragmentEntities) {
 494             try {
 495                 fragmentRepository.save(dataNodeFragment);
 496             } catch (final StaleStateException e) {
 497                 failedXpaths.add(dataNodeFragment.getXpath());
 498             }
 499         }
 500         if (!failedXpaths.isEmpty()) {
 501             final String failedXpathsConcatenated = String.join(",", failedXpaths);
 502             throw new ConcurrencyException("Concurrent Transactions", String.format(
 503                     "DataNodes : %s in Dataspace :'%s' with Anchor : '%s'  are updated by another transaction.",
 504                     failedXpathsConcatenated, anchorEntity.getDataspace().getName(), anchorEntity.getName()));
 505         }
 506     }
 507
 508     private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
 509                                                                 final DataNode newDataNode) {
 510         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 511
 512         final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
 513                 .collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
 514
 515         final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
 516         for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
 517             final FragmentEntity childFragment;
 518             if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
 519                 childFragment = convertToFragmentWithAllDescendants(existingFragmentEntity.getAnchor(),
 520                     newDataNodeChild);
 521             } else {
 522                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
 523                 updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
 524             }
 525             updatedChildFragments.add(childFragment);
 526         }
 527
 528         existingFragmentEntity.getChildFragments().clear();
 529         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
 530     }
 531
 532     @Override
 533     @Transactional
 534     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 535                                    final Collection<DataNode> newListElements) {
 536         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 537         final FragmentEntity parentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 538         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
 539         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
 540                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
 541         parentEntity.getChildFragments().removeAll(existingListElementFragmentEntitiesByXPath.values());
 542         final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
 543         for (final DataNode newListElement : newListElements) {
 544             final FragmentEntity existingListElementEntity =
 545                     existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
 546             final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
 547                     existingListElementEntity);
 548             updatedChildFragmentEntities.add(entityToBeAdded);
 549         }
 550         parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
 551         fragmentRepository.save(parentEntity);
 552     }
 553
 554     @Override
 555     @Transactional
 556     public void deleteDataNodes(final String dataspaceName, final String anchorName) {
 557         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 558         anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
 559             .ifPresent(anchorEntity -> fragmentRepository.deleteByAnchorIn(Collections.singletonList(anchorEntity)));
 560     }
 561
 562     @Override
 563     @Transactional
 564     public void deleteDataNodes(final String dataspaceName, final Collection<String> anchorNames) {
 565         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 566         final Collection<AnchorEntity> anchorEntities =
 567             anchorRepository.findAllByDataspaceAndNameIn(dataspaceEntity, anchorNames);
 568         fragmentRepository.deleteByAnchorIn(anchorEntities);
 569     }
 570
 571     @Override
 572     @Transactional
 573     public void deleteDataNodes(final String dataspaceName, final String anchorName,
 574                                 final Collection<String> xpathsToDelete) {
 575         deleteDataNodes(dataspaceName, anchorName, xpathsToDelete, false);
 576     }
 577
 578     private void deleteDataNodes(final String dataspaceName, final String anchorName,
 579                                  final Collection<String> xpathsToDelete, final boolean onlySupportListDeletion) {
 580         final boolean haveRootXpath = xpathsToDelete.stream().anyMatch(CpsDataPersistenceServiceImpl::isRootXpath);
 581         if (haveRootXpath) {
 582             deleteDataNodes(dataspaceName, anchorName);
 583             return;
 584         }
 585
 586         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 587
 588         final Collection<String> deleteChecklist = new HashSet<>(xpathsToDelete.size());
 589         for (final String xpath : xpathsToDelete) {
 590             try {
 591                 deleteChecklist.add(CpsPathUtil.getNormalizedXpath(xpath));
 592             } catch (final PathParsingException e) {
 593                 log.warn("Error parsing xpath \"{}\": {}", xpath, e.getMessage());
 594             }
 595         }
 596
 597         final Collection<String> xpathsToExistingContainers =
 598             fragmentRepository.findAllXpathByAnchorAndXpathIn(anchorEntity, deleteChecklist);
 599         if (onlySupportListDeletion) {
 600             final Collection<String> xpathsToExistingListElements = xpathsToExistingContainers.stream()
 601                 .filter(CpsPathUtil::isPathToListElement).collect(Collectors.toList());
 602             deleteChecklist.removeAll(xpathsToExistingListElements);
 603         } else {
 604             deleteChecklist.removeAll(xpathsToExistingContainers);
 605         }
 606
 607         final Collection<String> xpathsToExistingLists = deleteChecklist.stream()
 608             .filter(xpath -> fragmentRepository.existsByAnchorAndXpathStartsWith(anchorEntity, xpath + "["))
 609             .collect(Collectors.toList());
 610         deleteChecklist.removeAll(xpathsToExistingLists);
 611
 612         if (!deleteChecklist.isEmpty()) {
 613             throw new DataNodeNotFoundExceptionBatch(dataspaceName, anchorName, deleteChecklist);
 614         }
 615
 616         fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingContainers);
 617         fragmentRepository.deleteListsByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingLists);
 618     }
 619
 620     @Override
 621     @Transactional
 622     public void deleteListDataNode(final String dataspaceName, final String anchorName,
 623                                    final String targetXpath) {
 624         deleteDataNode(dataspaceName, anchorName, targetXpath, true);
 625     }
 626
 627     @Override
 628     @Transactional
 629     public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
 630         deleteDataNode(dataspaceName, anchorName, targetXpath, false);
 631     }
 632
 633     private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
 634                                 final boolean onlySupportListNodeDeletion) {
 635         final String normalizedXpath = getNormalizedXpath(targetXpath);
 636         try {
 637             deleteDataNodes(dataspaceName, anchorName, Collections.singletonList(normalizedXpath),
 638                 onlySupportListNodeDeletion);
 639         } catch (final DataNodeNotFoundExceptionBatch dataNodeNotFoundExceptionBatch) {
 640             throw new DataNodeNotFoundException(dataspaceName, anchorName, targetXpath);
 641         }
 642     }
 643
 644     private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
 645         if (newListElements.isEmpty()) {
 646             throw new CpsAdminException("Invalid list replacement",
 647                     "Cannot replace list elements with empty collection");
 648         }
 649         final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
 650         return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
 651     }
 652
 653     private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
 654                                                      final DataNode newListElement,
 655                                                      final FragmentEntity existingListElementEntity) {
 656         if (existingListElementEntity == null) {
 657             return convertToFragmentWithAllDescendants(parentEntity.getAnchor(), newListElement);
 658         }
 659         if (newListElement.getChildDataNodes().isEmpty()) {
 660             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
 661             existingListElementEntity.getChildFragments().clear();
 662         } else {
 663             updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
 664         }
 665         return existingListElementEntity;
 666     }
 667
 668     private static boolean isNewDataNode(final DataNode replacementDataNode,
 669                                          final Map<String, FragmentEntity> existingListElementsByXpath) {
 670         return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
 671     }
 672
 673     private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
 674                                                   final DataNode newListElement) {
 675         final FragmentEntity replacementFragmentEntity =
 676                 FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
 677                         newListElement.getLeaves())).build();
 678         existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
 679     }
 680
 681     private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
 682             final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
 683         return childEntities.stream()
 684                 .filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
 685                 .collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
 686     }
 687
 688     private static boolean isRootXpath(final String xpath) {
 689         return "/".equals(xpath) || "".equals(xpath);
 690     }
 691
 692     private String mergeLeaves(final Map<String, Serializable> updateLeaves, final String currentLeavesAsString) {
 693         Map<String, Serializable> currentLeavesAsMap = new HashMap<>();
 694         if (currentLeavesAsString != null) {
 695             currentLeavesAsMap = currentLeavesAsString.isEmpty()
 696                     ? new HashMap<>() : jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
 697             currentLeavesAsMap.putAll(updateLeaves);
 698         }
 699
 700         if (currentLeavesAsMap.isEmpty()) {
 701             return "";
 702         }
 703         return jsonObjectMapper.asJsonString(currentLeavesAsMap);
 704     }
 705
 706     private AnchorEntity getAnchorEntity(final String dataspaceName, final String anchorName) {
 707         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 708         return anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 709     }
 710 }