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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021-2023 Nordix Foundation
* Modifications Copyright (C) 2021 Pantheon.tech
* Modifications Copyright (C) 2020-2022 Bell Canada.
* Modifications Copyright (C) 2022-2023 TechMahindra Ltd.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.cps.spi.impl;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSet.Builder;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import javax.transaction.Transactional;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.hibernate.StaleStateException;
import org.onap.cps.cpspath.parser.CpsPathQuery;
import org.onap.cps.cpspath.parser.CpsPathUtil;
import org.onap.cps.cpspath.parser.PathParsingException;
import org.onap.cps.spi.CpsDataPersistenceService;
import org.onap.cps.spi.FetchDescendantsOption;
import org.onap.cps.spi.entities.AnchorEntity;
import org.onap.cps.spi.entities.DataspaceEntity;
import org.onap.cps.spi.entities.FragmentEntity;
import org.onap.cps.spi.entities.FragmentEntityArranger;
import org.onap.cps.spi.entities.FragmentExtract;
import org.onap.cps.spi.exceptions.AlreadyDefinedException;
import org.onap.cps.spi.exceptions.AlreadyDefinedExceptionBatch;
import org.onap.cps.spi.exceptions.ConcurrencyException;
import org.onap.cps.spi.exceptions.CpsAdminException;
import org.onap.cps.spi.exceptions.CpsPathException;
import org.onap.cps.spi.exceptions.DataNodeNotFoundException;
import org.onap.cps.spi.model.DataNode;
import org.onap.cps.spi.model.DataNodeBuilder;
import org.onap.cps.spi.repository.AnchorRepository;
import org.onap.cps.spi.repository.DataspaceRepository;
import org.onap.cps.spi.repository.FragmentQueryBuilder;
import org.onap.cps.spi.repository.FragmentRepository;
import org.onap.cps.spi.utils.SessionManager;
import org.onap.cps.utils.JsonObjectMapper;
import org.springframework.dao.DataIntegrityViolationException;
import org.springframework.stereotype.Service;
@Service
@Slf4j
@RequiredArgsConstructor
public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService {
private final DataspaceRepository dataspaceRepository;
private final AnchorRepository anchorRepository;
private final FragmentRepository fragmentRepository;
private final JsonObjectMapper jsonObjectMapper;
private final SessionManager sessionManager;
private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@[\\s\\S]+?]){0,1})";
@Override
public void addChildDataNode(final String dataspaceName, final String anchorName, final String parentNodeXpath,
final DataNode newChildDataNode) {
addNewChildDataNode(dataspaceName, anchorName, parentNodeXpath, newChildDataNode);
}
@Override
public void addChildDataNodes(final String dataspaceName, final String anchorName,
final String parentNodeXpath, final Collection<DataNode> dataNodes) {
addChildrenDataNodes(dataspaceName, anchorName, parentNodeXpath, dataNodes);
}
@Override
public void addListElements(final String dataspaceName, final String anchorName, final String parentNodeXpath,
final Collection<DataNode> newListElements) {
addChildrenDataNodes(dataspaceName, anchorName, parentNodeXpath, newListElements);
}
@Override
public void addMultipleLists(final String dataspaceName, final String anchorName, final String parentNodeXpath,
final Collection<Collection<DataNode>> newLists) {
final Collection<String> failedXpaths = new HashSet<>();
newLists.forEach(newList -> {
try {
addChildrenDataNodes(dataspaceName, anchorName, parentNodeXpath, newList);
} catch (final AlreadyDefinedExceptionBatch e) {
failedXpaths.addAll(e.getAlreadyDefinedXpaths());
}
});
if (!failedXpaths.isEmpty()) {
throw new AlreadyDefinedExceptionBatch(failedXpaths);
}
}
private void addNewChildDataNode(final String dataspaceName, final String anchorName,
final String parentNodeXpath, final DataNode newChild) {
final FragmentEntity parentFragmentEntity =
getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
final FragmentEntity newChildAsFragmentEntity =
convertToFragmentWithAllDescendants(parentFragmentEntity.getDataspace(),
parentFragmentEntity.getAnchor(), newChild);
newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
try {
fragmentRepository.save(newChildAsFragmentEntity);
} catch (final DataIntegrityViolationException e) {
throw AlreadyDefinedException.forDataNode(newChild.getXpath(), anchorName, e);
}
}
private void addChildrenDataNodes(final String dataspaceName, final String anchorName, final String parentNodeXpath,
final Collection<DataNode> newChildren) {
final FragmentEntity parentFragmentEntity =
getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
final List<FragmentEntity> fragmentEntities = new ArrayList<>(newChildren.size());
try {
newChildren.forEach(newChildAsDataNode -> {
final FragmentEntity newChildAsFragmentEntity =
convertToFragmentWithAllDescendants(parentFragmentEntity.getDataspace(),
parentFragmentEntity.getAnchor(), newChildAsDataNode);
newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
fragmentEntities.add(newChildAsFragmentEntity);
});
fragmentRepository.saveAll(fragmentEntities);
} catch (final DataIntegrityViolationException e) {
log.warn("Exception occurred : {} , While saving : {} children, retrying using individual save operations",
e, fragmentEntities.size());
retrySavingEachChildIndividually(dataspaceName, anchorName, parentNodeXpath, newChildren);
}
}
private void retrySavingEachChildIndividually(final String dataspaceName, final String anchorName,
final String parentNodeXpath,
final Collection<DataNode> newChildren) {
final Collection<String> failedXpaths = new HashSet<>();
for (final DataNode newChild : newChildren) {
try {
addNewChildDataNode(dataspaceName, anchorName, parentNodeXpath, newChild);
} catch (final AlreadyDefinedException e) {
failedXpaths.add(newChild.getXpath());
}
}
if (!failedXpaths.isEmpty()) {
throw new AlreadyDefinedExceptionBatch(failedXpaths);
}
}
@Override
public void storeDataNode(final String dataspaceName, final String anchorName, final DataNode dataNode) {
storeDataNodes(dataspaceName, anchorName, Collections.singletonList(dataNode));
}
@Override
public void storeDataNodes(final String dataspaceName, final String anchorName,
final Collection<DataNode> dataNodes) {
final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
final List<FragmentEntity> fragmentEntities = new ArrayList<>(dataNodes.size());
try {
for (final DataNode dataNode: dataNodes) {
final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(dataspaceEntity, anchorEntity,
dataNode);
fragmentEntities.add(fragmentEntity);
}
fragmentRepository.saveAll(fragmentEntities);
} catch (final DataIntegrityViolationException exception) {
log.warn("Exception occurred : {} , While saving : {} data nodes, Retrying saving data nodes individually",
exception, dataNodes.size());
storeDataNodesIndividually(dataspaceName, anchorName, dataNodes);
}
}
private void storeDataNodesIndividually(final String dataspaceName, final String anchorName,
final Collection<DataNode> dataNodes) {
final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
final Collection<String> failedXpaths = new HashSet<>();
for (final DataNode dataNode: dataNodes) {
try {
final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(dataspaceEntity, anchorEntity,
dataNode);
fragmentRepository.save(fragmentEntity);
} catch (final DataIntegrityViolationException e) {
failedXpaths.add(dataNode.getXpath());
}
}
if (!failedXpaths.isEmpty()) {
throw new AlreadyDefinedExceptionBatch(failedXpaths);
}
}
/**
* Convert DataNode object into Fragment and places the result in the fragments placeholder. Performs same action
* for all DataNode children recursively.
*
* @param dataspaceEntity dataspace
* @param anchorEntity anchorEntity
* @param dataNodeToBeConverted dataNode
* @return a Fragment built from current DataNode
*/
private FragmentEntity convertToFragmentWithAllDescendants(final DataspaceEntity dataspaceEntity,
final AnchorEntity anchorEntity,
final DataNode dataNodeToBeConverted) {
final FragmentEntity parentFragment = toFragmentEntity(dataspaceEntity, anchorEntity, dataNodeToBeConverted);
final Builder<FragmentEntity> childFragmentsImmutableSetBuilder = ImmutableSet.builder();
for (final DataNode childDataNode : dataNodeToBeConverted.getChildDataNodes()) {
final FragmentEntity childFragment =
convertToFragmentWithAllDescendants(parentFragment.getDataspace(), parentFragment.getAnchor(),
childDataNode);
childFragmentsImmutableSetBuilder.add(childFragment);
}
parentFragment.setChildFragments(childFragmentsImmutableSetBuilder.build());
return parentFragment;
}
private FragmentEntity toFragmentEntity(final DataspaceEntity dataspaceEntity,
final AnchorEntity anchorEntity, final DataNode dataNode) {
return FragmentEntity.builder()
.dataspace(dataspaceEntity)
.anchor(anchorEntity)
.xpath(dataNode.getXpath())
.attributes(jsonObjectMapper.asJsonString(dataNode.getLeaves()))
.build();
}
@Override
public Collection<DataNode> getDataNodes(final String dataspaceName, final String anchorName,
final String xpath,
final FetchDescendantsOption fetchDescendantsOption) {
final String targetXpath = isRootXpath(xpath) ? xpath : CpsPathUtil.getNormalizedXpath(xpath);
final Collection<DataNode> dataNodes = getDataNodesForMultipleXpaths(dataspaceName, anchorName,
Collections.singletonList(targetXpath), fetchDescendantsOption);
if (dataNodes.isEmpty()) {
throw new DataNodeNotFoundException(dataspaceName, anchorName, xpath);
}
return dataNodes;
}
@Override
public Collection<DataNode> getDataNodesForMultipleXpaths(final String dataspaceName, final String anchorName,
final Collection<String> xpaths,
final FetchDescendantsOption fetchDescendantsOption) {
final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
final Collection<String> nonRootXpaths = new HashSet<>(xpaths);
final boolean haveRootXpath = nonRootXpaths.removeIf(CpsDataPersistenceServiceImpl::isRootXpath);
final Collection<String> normalizedXpaths = new HashSet<>(nonRootXpaths.size());
for (final String xpath : nonRootXpaths) {
try {
normalizedXpaths.add(CpsPathUtil.getNormalizedXpath(xpath));
} catch (final PathParsingException e) {
log.warn("Error parsing xpath \"{}\" in getDataNodesForMultipleXpaths: {}", xpath, e.getMessage());
}
}
final Collection<FragmentEntity> fragmentEntities =
new HashSet<>(fragmentRepository.findByAnchorAndMultipleCpsPaths(anchorEntity.getId(), normalizedXpaths));
if (haveRootXpath) {
final List<FragmentExtract> fragmentExtracts = fragmentRepository.getTopLevelFragments(dataspaceEntity,
anchorEntity);
fragmentEntities.addAll(FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts));
}
return toDataNodes(fragmentEntities, fetchDescendantsOption);
}
private FragmentEntity getFragmentWithoutDescendantsByXpath(final String dataspaceName,
final String anchorName,
final String xpath) {
return getFragmentByXpath(dataspaceName, anchorName, xpath, FetchDescendantsOption.OMIT_DESCENDANTS);
}
private FragmentEntity getFragmentByXpath(final String dataspaceName, final String anchorName,
final String xpath, final FetchDescendantsOption fetchDescendantsOption) {
final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
final FragmentEntity fragmentEntity;
if (isRootXpath(xpath)) {
final List<FragmentExtract> fragmentExtracts = fragmentRepository.getTopLevelFragments(dataspaceEntity,
anchorEntity);
fragmentEntity = FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts)
.stream().findFirst().orElse(null);
} else {
final String normalizedXpath = getNormalizedXpath(xpath);
if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
fragmentEntity =
fragmentRepository.getByDataspaceAndAnchorAndXpath(dataspaceEntity, anchorEntity, normalizedXpath);
} else {
fragmentEntity = buildFragmentEntitiesFromFragmentExtracts(anchorEntity, normalizedXpath)
.stream().findFirst().orElse(null);
}
}
if (fragmentEntity == null) {
throw new DataNodeNotFoundException(dataspaceEntity.getName(), anchorEntity.getName(), xpath);
}
return fragmentEntity;
}
private Collection<FragmentEntity> buildFragmentEntitiesFromFragmentExtracts(final AnchorEntity anchorEntity,
final String normalizedXpath) {
final List<FragmentExtract> fragmentExtracts =
fragmentRepository.findByAnchorIdAndParentXpath(anchorEntity.getId(), normalizedXpath);
log.debug("Fetched {} fragment entities by anchor {} and cps path {}.",
fragmentExtracts.size(), anchorEntity.getName(), normalizedXpath);
return FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
}
@Override
public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
final FetchDescendantsOption fetchDescendantsOption) {
final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
final CpsPathQuery cpsPathQuery;
try {
cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
} catch (final PathParsingException e) {
throw new CpsPathException(e.getMessage());
}
Collection<FragmentEntity> fragmentEntities;
if (canUseRegexQuickFind(fetchDescendantsOption, cpsPathQuery)) {
return getDataNodesUsingRegexQuickFind(fetchDescendantsOption, anchorEntity, cpsPathQuery);
}
fragmentEntities = fragmentRepository.findByAnchorAndCpsPath(anchorEntity.getId(), cpsPathQuery);
if (cpsPathQuery.hasAncestorAxis()) {
fragmentEntities = getAncestorFragmentEntities(anchorEntity.getId(), cpsPathQuery, fragmentEntities);
}
return createDataNodesFromProxiedFragmentEntities(fetchDescendantsOption, anchorEntity, fragmentEntities);
}
private static boolean canUseRegexQuickFind(final FetchDescendantsOption fetchDescendantsOption,
final CpsPathQuery cpsPathQuery) {
return fetchDescendantsOption.equals(FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS)
&& !cpsPathQuery.hasLeafConditions()
&& !cpsPathQuery.hasTextFunctionCondition();
}
private List<DataNode> getDataNodesUsingRegexQuickFind(final FetchDescendantsOption fetchDescendantsOption,
final AnchorEntity anchorEntity,
final CpsPathQuery cpsPathQuery) {
Collection<FragmentEntity> fragmentEntities;
final String xpathRegex = FragmentQueryBuilder.getXpathSqlRegex(cpsPathQuery, true);
final List<FragmentExtract> fragmentExtracts =
fragmentRepository.quickFindWithDescendants(anchorEntity.getId(), xpathRegex);
fragmentEntities = FragmentEntityArranger.toFragmentEntityTrees(anchorEntity, fragmentExtracts);
if (cpsPathQuery.hasAncestorAxis()) {
fragmentEntities = getAncestorFragmentEntities(anchorEntity.getId(), cpsPathQuery, fragmentEntities);
}
return createDataNodesFromFragmentEntities(fetchDescendantsOption, fragmentEntities);
}
private Collection<FragmentEntity> getAncestorFragmentEntities(final int anchorId,
final CpsPathQuery cpsPathQuery,
final Collection<FragmentEntity> fragmentEntities) {
final Collection<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
return ancestorXpaths.isEmpty() ? Collections.emptyList()
: fragmentRepository.findByAnchorAndMultipleCpsPaths(anchorId, ancestorXpaths);
}
private List<DataNode> createDataNodesFromProxiedFragmentEntities(
final FetchDescendantsOption fetchDescendantsOption,
final AnchorEntity anchorEntity,
final Collection<FragmentEntity> proxiedFragmentEntities) {
final List<DataNode> dataNodes = new ArrayList<>(proxiedFragmentEntities.size());
for (final FragmentEntity proxiedFragmentEntity : proxiedFragmentEntities) {
if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
dataNodes.add(toDataNode(proxiedFragmentEntity, fetchDescendantsOption));
} else {
final String normalizedXpath = getNormalizedXpath(proxiedFragmentEntity.getXpath());
final Collection<FragmentEntity> unproxiedFragmentEntities =
buildFragmentEntitiesFromFragmentExtracts(anchorEntity, normalizedXpath);
for (final FragmentEntity unproxiedFragmentEntity : unproxiedFragmentEntities) {
dataNodes.add(toDataNode(unproxiedFragmentEntity, fetchDescendantsOption));
}
}
}
return Collections.unmodifiableList(dataNodes);
}
private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
final Collection<FragmentEntity> fragmentEntities) {
final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
for (final FragmentEntity fragmentEntity : fragmentEntities) {
dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
}
return Collections.unmodifiableList(dataNodes);
}
private static String getNormalizedXpath(final String xpathSource) {
final String normalizedXpath;
try {
normalizedXpath = CpsPathUtil.getNormalizedXpath(xpathSource);
} catch (final PathParsingException e) {
throw new CpsPathException(e.getMessage());
}
return normalizedXpath;
}
@Override
public String startSession() {
return sessionManager.startSession();
}
@Override
public void closeSession(final String sessionId) {
sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
}
@Override
public void lockAnchor(final String sessionId, final String dataspaceName,
final String anchorName, final Long timeoutInMilliseconds) {
sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
}
private static Set<String> processAncestorXpath(final Collection<FragmentEntity> fragmentEntities,
final CpsPathQuery cpsPathQuery) {
final Set<String> ancestorXpath = new HashSet<>();
final Pattern pattern =
Pattern.compile("([\\s\\S]*\\/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
+ REG_EX_FOR_OPTIONAL_LIST_INDEX + "\\/[\\s\\S]*");
for (final FragmentEntity fragmentEntity : fragmentEntities) {
final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
if (matcher.matches()) {
ancestorXpath.add(matcher.group(1));
}
}
return ancestorXpath;
}
private DataNode toDataNode(final FragmentEntity fragmentEntity,
final FetchDescendantsOption fetchDescendantsOption) {
final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
Map<String, Serializable> leaves = new HashMap<>();
if (fragmentEntity.getAttributes() != null) {
leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
}
return new DataNodeBuilder()
.withXpath(fragmentEntity.getXpath())
.withLeaves(leaves)
.withChildDataNodes(childDataNodes).build();
}
private Collection<DataNode> toDataNodes(final Collection<FragmentEntity> fragmentEntities,
final FetchDescendantsOption fetchDescendantsOption) {
final Collection<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
for (final FragmentEntity fragmentEntity : fragmentEntities) {
dataNodes.add(toDataNode(fragmentEntity, fetchDescendantsOption));
}
return dataNodes;
}
private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
final FetchDescendantsOption fetchDescendantsOption) {
if (fetchDescendantsOption.hasNext()) {
return fragmentEntity.getChildFragments().stream()
.map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
.collect(Collectors.toList());
}
return Collections.emptyList();
}
@Override
public void updateDataLeaves(final String dataspaceName, final String anchorName, final String xpath,
final Map<String, Serializable> updateLeaves) {
final FragmentEntity fragmentEntity = getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, xpath);
final String currentLeavesAsString = fragmentEntity.getAttributes();
final String mergedLeaves = mergeLeaves(updateLeaves, currentLeavesAsString);
fragmentEntity.setAttributes(mergedLeaves);
fragmentRepository.save(fragmentEntity);
}
@Override
public void updateDataNodeAndDescendants(final String dataspaceName, final String anchorName,
final DataNode dataNode) {
final FragmentEntity fragmentEntity =
getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, dataNode.getXpath());
updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode);
try {
fragmentRepository.save(fragmentEntity);
} catch (final StaleStateException staleStateException) {
throw new ConcurrencyException("Concurrent Transactions",
String.format("dataspace :'%s', Anchor : '%s' and xpath: '%s' is updated by another transaction.",
dataspaceName, anchorName, dataNode.getXpath()));
}
}
@Override
public void updateDataNodesAndDescendants(final String dataspaceName,
final String anchorName,
final List<DataNode> dataNodes) {
final Map<DataNode, FragmentEntity> dataNodeFragmentEntityMap = dataNodes.stream()
.collect(Collectors.toMap(
dataNode -> dataNode,
dataNode ->
getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, dataNode.getXpath())));
dataNodeFragmentEntityMap.forEach(
(dataNode, fragmentEntity) -> updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode));
try {
fragmentRepository.saveAll(dataNodeFragmentEntityMap.values());
} catch (final StaleStateException staleStateException) {
retryUpdateDataNodesIndividually(dataspaceName, anchorName, dataNodeFragmentEntityMap.values());
}
}
private void retryUpdateDataNodesIndividually(final String dataspaceName, final String anchorName,
final Collection<FragmentEntity> fragmentEntities) {
final Collection<String> failedXpaths = new HashSet<>();
fragmentEntities.forEach(dataNodeFragment -> {
try {
fragmentRepository.save(dataNodeFragment);
} catch (final StaleStateException e) {
failedXpaths.add(dataNodeFragment.getXpath());
}
});
if (!failedXpaths.isEmpty()) {
final String failedXpathsConcatenated = String.join(",", failedXpaths);
throw new ConcurrencyException("Concurrent Transactions", String.format(
"DataNodes : %s in Dataspace :'%s' with Anchor : '%s' are updated by another transaction.",
failedXpathsConcatenated, dataspaceName, anchorName));
}
}
private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
final DataNode newDataNode) {
existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
.collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
final FragmentEntity childFragment;
if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
childFragment = convertToFragmentWithAllDescendants(
existingFragmentEntity.getDataspace(), existingFragmentEntity.getAnchor(), newDataNodeChild);
} else {
childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
}
updatedChildFragments.add(childFragment);
}
existingFragmentEntity.getChildFragments().clear();
existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
}
@Override
@Transactional
public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
final Collection<DataNode> newListElements) {
final FragmentEntity parentEntity =
getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
deleteListElements(parentEntity.getChildFragments(), existingListElementFragmentEntitiesByXPath);
final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
for (final DataNode newListElement : newListElements) {
final FragmentEntity existingListElementEntity =
existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
existingListElementEntity);
updatedChildFragmentEntities.add(entityToBeAdded);
}
parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
fragmentRepository.save(parentEntity);
}
@Override
@Transactional
public void deleteDataNodes(final String dataspaceName, final String anchorName) {
final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
.ifPresent(
anchorEntity -> fragmentRepository.deleteByAnchorIn(Set.of(anchorEntity)));
}
@Override
@Transactional
public void deleteDataNodes(final String dataspaceName, final String anchorName,
final Collection<String> xpathsToDelete) {
final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
final Collection<String> normalizedXpaths = new ArrayList<>(xpathsToDelete.size());
for (final String xpath : xpathsToDelete) {
try {
normalizedXpaths.add(CpsPathUtil.getNormalizedXpath(xpath));
} catch (final PathParsingException e) {
log.debug("Error parsing xpath \"{}\" in deleteDataNodes: {}", xpath, e.getMessage());
}
}
fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), normalizedXpaths);
fragmentRepository.deleteListsByAnchorIdAndXpaths(anchorEntity.getId(), normalizedXpaths);
}
@Override
@Transactional
public void deleteListDataNode(final String dataspaceName, final String anchorName,
final String targetXpath) {
deleteDataNode(dataspaceName, anchorName, targetXpath, true);
}
@Override
@Transactional
public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
deleteDataNode(dataspaceName, anchorName, targetXpath, false);
}
private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
final boolean onlySupportListNodeDeletion) {
final String parentNodeXpath;
FragmentEntity parentFragmentEntity = null;
boolean targetDeleted;
if (isRootXpath(targetXpath)) {
deleteDataNodes(dataspaceName, anchorName);
targetDeleted = true;
} else {
if (isRootContainerNodeXpath(targetXpath)) {
parentNodeXpath = targetXpath;
} else {
parentNodeXpath = CpsPathUtil.getNormalizedParentXpath(targetXpath);
}
parentFragmentEntity = getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
if (CpsPathUtil.isPathToListElement(targetXpath)) {
targetDeleted = deleteDataNode(parentFragmentEntity, targetXpath);
} else {
targetDeleted = deleteAllListElements(parentFragmentEntity, targetXpath);
final boolean tryToDeleteDataNode = !targetDeleted && !onlySupportListNodeDeletion;
if (tryToDeleteDataNode) {
targetDeleted = deleteDataNode(parentFragmentEntity, targetXpath);
}
}
}
if (!targetDeleted) {
final String additionalInformation = onlySupportListNodeDeletion
? "The target is probably not a List." : "";
throw new DataNodeNotFoundException(parentFragmentEntity.getDataspace().getName(),
parentFragmentEntity.getAnchor().getName(), targetXpath, additionalInformation);
}
}
private boolean deleteDataNode(final FragmentEntity parentFragmentEntity, final String targetXpath) {
final String normalizedTargetXpath = CpsPathUtil.getNormalizedXpath(targetXpath);
if (parentFragmentEntity.getXpath().equals(normalizedTargetXpath)) {
fragmentRepository.deleteFragmentEntity(parentFragmentEntity.getId());
return true;
}
if (parentFragmentEntity.getChildFragments()
.removeIf(fragment -> fragment.getXpath().equals(normalizedTargetXpath))) {
fragmentRepository.save(parentFragmentEntity);
return true;
}
return false;
}
private boolean deleteAllListElements(final FragmentEntity parentFragmentEntity, final String listXpath) {
final String normalizedListXpath = CpsPathUtil.getNormalizedXpath(listXpath);
final String deleteTargetXpathPrefix = normalizedListXpath + "[";
if (parentFragmentEntity.getChildFragments()
.removeIf(fragment -> fragment.getXpath().startsWith(deleteTargetXpathPrefix))) {
fragmentRepository.save(parentFragmentEntity);
return true;
}
return false;
}
private static void deleteListElements(
final Collection<FragmentEntity> fragmentEntities,
final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath) {
fragmentEntities.removeAll(existingListElementFragmentEntitiesByXPath.values());
}
private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
if (newListElements.isEmpty()) {
throw new CpsAdminException("Invalid list replacement",
"Cannot replace list elements with empty collection");
}
final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
}
private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
final DataNode newListElement,
final FragmentEntity existingListElementEntity) {
if (existingListElementEntity == null) {
return convertToFragmentWithAllDescendants(
parentEntity.getDataspace(), parentEntity.getAnchor(), newListElement);
}
if (newListElement.getChildDataNodes().isEmpty()) {
copyAttributesFromNewListElement(existingListElementEntity, newListElement);
existingListElementEntity.getChildFragments().clear();
} else {
updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
}
return existingListElementEntity;
}
private static boolean isNewDataNode(final DataNode replacementDataNode,
final Map<String, FragmentEntity> existingListElementsByXpath) {
return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
}
private static boolean isRootContainerNodeXpath(final String xpath) {
return 0 == xpath.lastIndexOf('/');
}
private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
final DataNode newListElement) {
final FragmentEntity replacementFragmentEntity =
FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
newListElement.getLeaves())).build();
existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
}
private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
return childEntities.stream()
.filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
.collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
}
private static boolean isRootXpath(final String xpath) {
return "/".equals(xpath) || "".equals(xpath);
}
private String mergeLeaves(final Map<String, Serializable> updateLeaves, final String currentLeavesAsString) {
final Map<String, Serializable> currentLeavesAsMap = currentLeavesAsString.isEmpty()
? new HashMap<>() : jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
currentLeavesAsMap.putAll(updateLeaves);
if (currentLeavesAsMap.isEmpty()) {
return "";
}
return jsonObjectMapper.asJsonString(currentLeavesAsMap);
}
}
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