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.entities.FragmentEntityArranger;
  55 import org.onap.cps.spi.entities.FragmentExtract;
  56 import org.onap.cps.spi.exceptions.AlreadyDefinedException;
  57 import org.onap.cps.spi.exceptions.AlreadyDefinedExceptionBatch;
  58 import org.onap.cps.spi.exceptions.ConcurrencyException;
  59 import org.onap.cps.spi.exceptions.CpsAdminException;
  60 import org.onap.cps.spi.exceptions.CpsPathException;
  61 import org.onap.cps.spi.exceptions.DataNodeNotFoundException;
  62 import org.onap.cps.spi.exceptions.DataNodeNotFoundExceptionBatch;
  63 import org.onap.cps.spi.model.DataNode;
  64 import org.onap.cps.spi.model.DataNodeBuilder;
  65 import org.onap.cps.spi.repository.AnchorRepository;
  66 import org.onap.cps.spi.repository.DataspaceRepository;
  67 import org.onap.cps.spi.repository.FragmentQueryBuilder;
  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     private Collection<FragmentEntity> buildFragmentEntitiesFromFragmentExtracts(final AnchorEntity anchorEntity,
 303                                                                                  final String normalizedXpath) {
 304         final List<FragmentExtract> fragmentExtracts =
 305             fragmentRepository.findByAnchorAndParentXpath(anchorEntity, normalizedXpath);
 306         return FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
 307     }
 308
 309     @Override
 310     @Timed(value = "cps.data.persistence.service.datanode.query",
 311             description = "Time taken to query data nodes")
 312     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
 313                                          final FetchDescendantsOption fetchDescendantsOption) {
 314         final AnchorEntity anchorEntity = (Strings.isNullOrEmpty(anchorName)) ? ALL_ANCHORS
 315                 : getAnchorEntity(dataspaceName, anchorName);
 316         final CpsPathQuery cpsPathQuery;
 317         try {
 318             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 319         } catch (final PathParsingException e) {
 320             throw new CpsPathException(e.getMessage());
 321         }
 322
 323         Collection<FragmentEntity> fragmentEntities;
 324         if (canUseRegexQuickFind(fetchDescendantsOption, cpsPathQuery)) {
 325             return getDataNodesUsingRegexQuickFind(fetchDescendantsOption, anchorEntity, cpsPathQuery);
 326         }
 327         fragmentEntities = (anchorEntity == ALL_ANCHORS) ? fragmentRepository.findByCpsPath(cpsPathQuery)
 328                 : fragmentRepository.findByAnchorAndCpsPath(anchorEntity.getId(), cpsPathQuery);
 329         if (cpsPathQuery.hasAncestorAxis()) {
 330             final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 331             fragmentEntities = (anchorEntity == ALL_ANCHORS) ? getAncestorFragmentEntitiesAcrossAnchors(cpsPathQuery,
 332             fragmentEntities) : getFragmentEntities(anchorEntity, ancestorXpaths, fetchDescendantsOption);
 333         }
 334         return createDataNodesFromProxiedFragmentEntities(fetchDescendantsOption, anchorEntity, fragmentEntities);
 335     }
 336
 337     @Override
 338     public List<DataNode> queryDataNodesAcrossAnchors(final String dataspaceName, final String cpsPath,
 339                                          final FetchDescendantsOption fetchDescendantsOption) {
 340         return queryDataNodes(dataspaceName, QUERY_ACROSS_ANCHORS, cpsPath, fetchDescendantsOption);
 341     }
 342
 343     private static boolean canUseRegexQuickFind(final FetchDescendantsOption fetchDescendantsOption,
 344                                                 final CpsPathQuery cpsPathQuery) {
 345         return fetchDescendantsOption.equals(FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS)
 346             && !cpsPathQuery.hasAncestorAxis()
 347             && !cpsPathQuery.hasLeafConditions()
 348             && !cpsPathQuery.hasTextFunctionCondition()
 349             && !cpsPathQuery.hasContainsFunctionCondition();
 350     }
 351
 352     private List<DataNode> getDataNodesUsingRegexQuickFind(final FetchDescendantsOption fetchDescendantsOption,
 353                                                            final AnchorEntity anchorEntity,
 354                                                            final CpsPathQuery cpsPathQuery) {
 355         final String xpathRegex = FragmentQueryBuilder.getXpathSqlRegexForQuickFindWithDescendants(cpsPathQuery);
 356         final List<FragmentExtract> fragmentExtracts = (anchorEntity == ALL_ANCHORS)
 357             ? fragmentRepository.quickFindWithDescendantsAcrossAnchors(xpathRegex)
 358             : fragmentRepository.quickFindWithDescendants(anchorEntity.getId(), xpathRegex);
 359         final Collection<FragmentEntity> fragmentEntities =
 360             FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
 361         return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
 362     }
 363
 364     private Collection<FragmentEntity> getAncestorFragmentEntitiesAcrossAnchors(final CpsPathQuery cpsPathQuery,
 365         final Collection<FragmentEntity> fragmentEntities) {
 366         final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 367         return ancestorXpaths.isEmpty() ? Collections.emptyList() : fragmentRepository.findAllByXpathIn(ancestorXpaths);
 368     }
 369
 370     private List<DataNode> createDataNodesFromProxiedFragmentEntities(
 371                                             final FetchDescendantsOption fetchDescendantsOption,
 372                                             final AnchorEntity anchorEntity,
 373                                             final Collection<FragmentEntity> proxiedFragmentEntities) {
 374         final List<DataNode> dataNodes = new ArrayList<>(proxiedFragmentEntities.size());
 375         for (final FragmentEntity proxiedFragmentEntity : proxiedFragmentEntities) {
 376             if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
 377                 dataNodes.add(toDataNode(proxiedFragmentEntity, fetchDescendantsOption));
 378             } else {
 379                 final String normalizedXpath = getNormalizedXpath(proxiedFragmentEntity.getXpath());
 380                 final AnchorEntity anchorEntityForFragmentExtract = (anchorEntity == ALL_ANCHORS)
 381                         ? proxiedFragmentEntity.getAnchor() : anchorEntity;
 382                 final Collection<FragmentEntity> unproxiedFragmentEntities =
 383                     buildFragmentEntitiesFromFragmentExtracts(anchorEntityForFragmentExtract, normalizedXpath);
 384                 for (final FragmentEntity unproxiedFragmentEntity : unproxiedFragmentEntities) {
 385                     dataNodes.add(toDataNode(unproxiedFragmentEntity, fetchDescendantsOption));
 386                 }
 387             }
 388         }
 389         return Collections.unmodifiableList(dataNodes);
 390     }
 391
 392     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 393                                                                final Collection<FragmentEntity> fragmentEntities) {
 394         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 395         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 396             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 397         }
 398         return Collections.unmodifiableList(dataNodes);
 399     }
 400
 401     private static String getNormalizedXpath(final String xpathSource) {
 402         if (isRootXpath(xpathSource)) {
 403             return xpathSource;
 404         }
 405         try {
 406             return CpsPathUtil.getNormalizedXpath(xpathSource);
 407         } catch (final PathParsingException e) {
 408             throw new CpsPathException(e.getMessage());
 409         }
 410     }
 411
 412     @Override
 413     public String startSession() {
 414         return sessionManager.startSession();
 415     }
 416
 417     @Override
 418     public void closeSession(final String sessionId) {
 419         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 420     }
 421
 422     @Override
 423     public void lockAnchor(final String sessionId, final String dataspaceName,
 424                            final String anchorName, final Long timeoutInMilliseconds) {
 425         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 426     }
 427
 428     private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
 429                                                     final CpsPathQuery cpsPathQuery) {
 430         final Set<String> ancestorXpath = new HashSet<>();
 431         final Pattern pattern =
 432                 Pattern.compile("(.*/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 433                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "/.*");
 434         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 435             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 436             if (matcher.matches()) {
 437                 ancestorXpath.add(matcher.group(1));
 438             }
 439         }
 440         return ancestorXpath;
 441     }
 442
 443     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 444                                 final FetchDescendantsOption fetchDescendantsOption) {
 445         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 446         Map<String, Serializable> leaves = new HashMap<>();
 447         if (fragmentEntity.getAttributes() != null) {
 448             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 449         }
 450         return new DataNodeBuilder()
 451                 .withXpath(fragmentEntity.getXpath())
 452                 .withLeaves(leaves)
 453                 .withDataspace(fragmentEntity.getAnchor().getDataspace().getName())
 454                 .withAnchor(fragmentEntity.getAnchor().getName())
 455                 .withChildDataNodes(childDataNodes).build();
 456     }
 457
 458     private Collection<DataNode> toDataNodes(final Collection<FragmentEntity> fragmentEntities,
 459                                              final FetchDescendantsOption fetchDescendantsOption) {
 460         final Collection<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 461         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 462             dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
 463         }
 464         return dataNodes;
 465     }
 466
 467     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
 468                                              final FetchDescendantsOption fetchDescendantsOption) {
 469         if (fetchDescendantsOption.hasNext()) {
 470             return fragmentEntity.getChildFragments().stream()
 471                     .map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
 472                     .collect(Collectors.toList());
 473         }
 474         return Collections.emptyList();
 475     }
 476
 477     @Override
 478     public void updateDataLeaves(final String dataspaceName, final String anchorName, final String xpath,
 479                                  final Map<String, Serializable> updateLeaves) {
 480         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 481         final FragmentEntity fragmentEntity = getFragmentEntity(anchorEntity, xpath);
 482         final String currentLeavesAsString = fragmentEntity.getAttributes();
 483         final String mergedLeaves = mergeLeaves(updateLeaves, currentLeavesAsString);
 484         fragmentEntity.setAttributes(mergedLeaves);
 485         fragmentRepository.save(fragmentEntity);
 486     }
 487
 488     @Override
 489     public void updateDataNodesAndDescendants(final String dataspaceName, final String anchorName,
 490                                               final Collection<DataNode> updatedDataNodes) {
 491         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 492
 493         final Map<String, DataNode> xpathToUpdatedDataNode = updatedDataNodes.stream()
 494             .collect(Collectors.toMap(DataNode::getXpath, dataNode -> dataNode));
 495
 496         final Collection<String> xpaths = xpathToUpdatedDataNode.keySet();
 497         final Collection<FragmentEntity> existingFragmentEntities =
 498             getFragmentEntities(anchorEntity, xpaths, FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
 499
 500         for (final FragmentEntity existingFragmentEntity : existingFragmentEntities) {
 501             final DataNode updatedDataNode = xpathToUpdatedDataNode.get(existingFragmentEntity.getXpath());
 502             updateFragmentEntityAndDescendantsWithDataNode(existingFragmentEntity, updatedDataNode);
 503         }
 504
 505         try {
 506             fragmentRepository.saveAll(existingFragmentEntities);
 507         } catch (final StaleStateException staleStateException) {
 508             retryUpdateDataNodesIndividually(anchorEntity, existingFragmentEntities);
 509         }
 510     }
 511
 512     private void retryUpdateDataNodesIndividually(final AnchorEntity anchorEntity,
 513                                                   final Collection<FragmentEntity> fragmentEntities) {
 514         final Collection<String> failedXpaths = new HashSet<>();
 515         for (final FragmentEntity dataNodeFragment : fragmentEntities) {
 516             try {
 517                 fragmentRepository.save(dataNodeFragment);
 518             } catch (final StaleStateException e) {
 519                 failedXpaths.add(dataNodeFragment.getXpath());
 520             }
 521         }
 522         if (!failedXpaths.isEmpty()) {
 523             final String failedXpathsConcatenated = String.join(",", failedXpaths);
 524             throw new ConcurrencyException("Concurrent Transactions", String.format(
 525                     "DataNodes : %s in Dataspace :'%s' with Anchor : '%s'  are updated by another transaction.",
 526                     failedXpathsConcatenated, anchorEntity.getDataspace().getName(), anchorEntity.getName()));
 527         }
 528     }
 529
 530     private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
 531                                                                 final DataNode newDataNode) {
 532         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 533
 534         final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
 535                 .collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
 536
 537         final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
 538         for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
 539             final FragmentEntity childFragment;
 540             if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
 541                 childFragment = convertToFragmentWithAllDescendants(existingFragmentEntity.getAnchor(),
 542                     newDataNodeChild);
 543             } else {
 544                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
 545                 updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
 546             }
 547             updatedChildFragments.add(childFragment);
 548         }
 549
 550         existingFragmentEntity.getChildFragments().clear();
 551         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
 552     }
 553
 554     @Override
 555     @Transactional
 556     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 557                                    final Collection<DataNode> newListElements) {
 558         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 559         final FragmentEntity parentEntity = getFragmentEntity(anchorEntity, parentNodeXpath);
 560         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
 561         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
 562                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
 563         parentEntity.getChildFragments().removeAll(existingListElementFragmentEntitiesByXPath.values());
 564         final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
 565         for (final DataNode newListElement : newListElements) {
 566             final FragmentEntity existingListElementEntity =
 567                     existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
 568             final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
 569                     existingListElementEntity);
 570             updatedChildFragmentEntities.add(entityToBeAdded);
 571         }
 572         parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
 573         fragmentRepository.save(parentEntity);
 574     }
 575
 576     @Override
 577     @Transactional
 578     public void deleteDataNodes(final String dataspaceName, final String anchorName) {
 579         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 580         anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
 581             .ifPresent(anchorEntity -> fragmentRepository.deleteByAnchorIn(Collections.singletonList(anchorEntity)));
 582     }
 583
 584     @Override
 585     @Transactional
 586     public void deleteDataNodes(final String dataspaceName, final Collection<String> anchorNames) {
 587         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 588         final Collection<AnchorEntity> anchorEntities =
 589             anchorRepository.findAllByDataspaceAndNameIn(dataspaceEntity, anchorNames);
 590         fragmentRepository.deleteByAnchorIn(anchorEntities);
 591     }
 592
 593     @Override
 594     @Transactional
 595     public void deleteDataNodes(final String dataspaceName, final String anchorName,
 596                                 final Collection<String> xpathsToDelete) {
 597         deleteDataNodes(dataspaceName, anchorName, xpathsToDelete, false);
 598     }
 599
 600     private void deleteDataNodes(final String dataspaceName, final String anchorName,
 601                                  final Collection<String> xpathsToDelete, final boolean onlySupportListDeletion) {
 602         final boolean haveRootXpath = xpathsToDelete.stream().anyMatch(CpsDataPersistenceServiceImpl::isRootXpath);
 603         if (haveRootXpath) {
 604             deleteDataNodes(dataspaceName, anchorName);
 605             return;
 606         }
 607
 608         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
 609
 610         final Collection<String> deleteChecklist = new HashSet<>(xpathsToDelete.size());
 611         for (final String xpath : xpathsToDelete) {
 612             try {
 613                 deleteChecklist.add(CpsPathUtil.getNormalizedXpath(xpath));
 614             } catch (final PathParsingException e) {
 615                 log.warn("Error parsing xpath \"{}\": {}", xpath, e.getMessage());
 616             }
 617         }
 618
 619         final Collection<String> xpathsToExistingContainers =
 620             fragmentRepository.findAllXpathByAnchorAndXpathIn(anchorEntity, deleteChecklist);
 621         if (onlySupportListDeletion) {
 622             final Collection<String> xpathsToExistingListElements = xpathsToExistingContainers.stream()
 623                 .filter(CpsPathUtil::isPathToListElement).collect(Collectors.toList());
 624             deleteChecklist.removeAll(xpathsToExistingListElements);
 625         } else {
 626             deleteChecklist.removeAll(xpathsToExistingContainers);
 627         }
 628
 629         final Collection<String> xpathsToExistingLists = deleteChecklist.stream()
 630             .filter(xpath -> fragmentRepository.existsByAnchorAndXpathStartsWith(anchorEntity, xpath + "["))
 631             .collect(Collectors.toList());
 632         deleteChecklist.removeAll(xpathsToExistingLists);
 633
 634         if (!deleteChecklist.isEmpty()) {
 635             throw new DataNodeNotFoundExceptionBatch(dataspaceName, anchorName, deleteChecklist);
 636         }
 637
 638         fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingContainers);
 639         fragmentRepository.deleteListsByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingLists);
 640     }
 641
 642     @Override
 643     @Transactional
 644     public void deleteListDataNode(final String dataspaceName, final String anchorName,
 645                                    final String targetXpath) {
 646         deleteDataNode(dataspaceName, anchorName, targetXpath, true);
 647     }
 648
 649     @Override
 650     @Transactional
 651     public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
 652         deleteDataNode(dataspaceName, anchorName, targetXpath, false);
 653     }
 654
 655     private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
 656                                 final boolean onlySupportListNodeDeletion) {
 657         final String normalizedXpath = getNormalizedXpath(targetXpath);
 658         try {
 659             deleteDataNodes(dataspaceName, anchorName, Collections.singletonList(normalizedXpath),
 660                 onlySupportListNodeDeletion);
 661         } catch (final DataNodeNotFoundExceptionBatch dataNodeNotFoundExceptionBatch) {
 662             throw new DataNodeNotFoundException(dataspaceName, anchorName, targetXpath);
 663         }
 664     }
 665
 666     private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
 667         if (newListElements.isEmpty()) {
 668             throw new CpsAdminException("Invalid list replacement",
 669                     "Cannot replace list elements with empty collection");
 670         }
 671         final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
 672         return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
 673     }
 674
 675     private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
 676                                                      final DataNode newListElement,
 677                                                      final FragmentEntity existingListElementEntity) {
 678         if (existingListElementEntity == null) {
 679             return convertToFragmentWithAllDescendants(parentEntity.getAnchor(), newListElement);
 680         }
 681         if (newListElement.getChildDataNodes().isEmpty()) {
 682             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
 683             existingListElementEntity.getChildFragments().clear();
 684         } else {
 685             updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
 686         }
 687         return existingListElementEntity;
 688     }
 689
 690     private static boolean isNewDataNode(final DataNode replacementDataNode,
 691                                          final Map<String, FragmentEntity> existingListElementsByXpath) {
 692         return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
 693     }
 694
 695     private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
 696                                                   final DataNode newListElement) {
 697         final FragmentEntity replacementFragmentEntity =
 698                 FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
 699                         newListElement.getLeaves())).build();
 700         existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
 701     }
 702
 703     private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
 704             final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
 705         return childEntities.stream()
 706                 .filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
 707                 .collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
 708     }
 709
 710     private static boolean isRootXpath(final String xpath) {
 711         return "/".equals(xpath) || "".equals(xpath);
 712     }
 713
 714     private String mergeLeaves(final Map<String, Serializable> updateLeaves, final String currentLeavesAsString) {
 715         final Map<String, Serializable> currentLeavesAsMap = currentLeavesAsString.isEmpty()
 716             ? new HashMap<>() : jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
 717         currentLeavesAsMap.putAll(updateLeaves);
 718         if (currentLeavesAsMap.isEmpty()) {
 719             return "";
 720         }
 721         return jsonObjectMapper.asJsonString(currentLeavesAsMap);
 722     }
 723
 724     private AnchorEntity getAnchorEntity(final String dataspaceName, final String anchorName) {
 725         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 726         return anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 727     }
 728 }