CPS-341 Support for multiple data tree instances under 1 anchor
[cps.git] / cps-ri / src / main / java / org / onap / cps / spi / impl / CpsDataPersistenceServiceImpl.java
index ebc851a..b7da66e 100644 (file)
@@ -3,6 +3,7 @@
  *  Copyright (C) 2021-2022 Nordix Foundation
  *  Modifications Copyright (C) 2021 Pantheon.tech
  *  Modifications Copyright (C) 2020-2022 Bell Canada.
+ *  Modifications Copyright (C) 2022 TechMahindra Ltd.
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -24,6 +25,7 @@ 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;
@@ -47,8 +49,8 @@ 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.SchemaSetEntity;
-import org.onap.cps.spi.entities.YangResourceEntity;
+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;
@@ -62,8 +64,6 @@ import org.onap.cps.spi.repository.DataspaceRepository;
 import org.onap.cps.spi.repository.FragmentRepository;
 import org.onap.cps.spi.utils.SessionManager;
 import org.onap.cps.utils.JsonObjectMapper;
-import org.onap.cps.yang.YangTextSchemaSourceSetBuilder;
-import org.opendaylight.yangtools.yang.model.api.SchemaContext;
 import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.stereotype.Service;
 
@@ -73,18 +73,15 @@ import org.springframework.stereotype.Service;
 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})";
     private static final Pattern REG_EX_PATTERN_FOR_LIST_ELEMENT_KEY_PREDICATE =
             Pattern.compile("\\[(\\@([^\\/]{0,9999}))\\]$");
+    private static final String TOP_LEVEL_MODULE_PREFIX_PROPERTY_NAME = "topLevelModulePrefix";
 
     @Override
     public void addChildDataNode(final String dataspaceName, final String anchorName, final String parentNodeXpath,
@@ -92,6 +89,12 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
         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) {
@@ -118,7 +121,8 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
 
     private void addNewChildDataNode(final String dataspaceName, final String anchorName,
                                      final String parentNodeXpath, final DataNode newChild) {
-        final FragmentEntity parentFragmentEntity = getFragmentByXpath(dataspaceName, anchorName, parentNodeXpath);
+        final FragmentEntity parentFragmentEntity =
+            getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
         final FragmentEntity newChildAsFragmentEntity =
                 convertToFragmentWithAllDescendants(parentFragmentEntity.getDataspace(),
                         parentFragmentEntity.getAnchor(), newChild);
@@ -133,7 +137,8 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
 
     private void addChildrenDataNodes(final String dataspaceName, final String anchorName, final String parentNodeXpath,
                                       final Collection<DataNode> newChildren) {
-        final FragmentEntity parentFragmentEntity = getFragmentByXpath(dataspaceName, anchorName, parentNodeXpath);
+        final FragmentEntity parentFragmentEntity =
+            getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
         final List<FragmentEntity> fragmentEntities = new ArrayList<>(newChildren.size());
         try {
             newChildren.forEach(newChildAsDataNode -> {
@@ -169,14 +174,45 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
 
     @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 FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(dataspaceEntity, anchorEntity,
-                dataNode);
+        final List<FragmentEntity> fragmentEntities = new ArrayList<>(dataNodes.size());
         try {
-            fragmentRepository.save(fragmentEntity);
+            for (final DataNode dataNode: dataNodes) {
+                final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(dataspaceEntity, anchorEntity,
+                        dataNode);
+                fragmentEntities.add(fragmentEntity);
+            }
+            fragmentRepository.saveAll(fragmentEntities);
         } catch (final DataIntegrityViolationException exception) {
-            throw AlreadyDefinedException.forDataNode(dataNode.getXpath(), anchorName, 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);
         }
     }
 
@@ -217,30 +253,53 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
     @Override
     public DataNode getDataNode(final String dataspaceName, final String anchorName, final String xpath,
                                 final FetchDescendantsOption fetchDescendantsOption) {
-        final FragmentEntity fragmentEntity = getFragmentByXpath(dataspaceName, anchorName, xpath);
+        final FragmentEntity fragmentEntity = getFragmentByXpath(dataspaceName, anchorName, xpath,
+            fetchDescendantsOption);
         return toDataNode(fragmentEntity, 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 String xpath, final FetchDescendantsOption fetchDescendantsOption) {
         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
         if (isRootXpath(xpath)) {
-            return fragmentRepository.findFirstRootByDataspaceAndAnchor(
-                    dataspaceEntity, anchorEntity);
+            final List<FragmentExtract> fragmentExtracts = fragmentRepository.getTopLevelFragments(dataspaceEntity,
+                    anchorEntity);
+            return FragmentEntityArranger.toFragmentEntityTree(anchorEntity,
+                    fragmentExtracts);
         } else {
-            final String normalizedXpath;
-            try {
-                normalizedXpath = CpsPathUtil.getNormalizedXpath(xpath);
-            } catch (final PathParsingException e) {
-                throw new CpsPathException(e.getMessage());
+            final String normalizedXpath = getNormalizedXpath(xpath);
+            final FragmentEntity fragmentEntity;
+            if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
+                fragmentEntity =
+                    fragmentRepository.getByDataspaceAndAnchorAndXpath(dataspaceEntity, anchorEntity, normalizedXpath);
+            } else {
+                fragmentEntity = buildFragmentEntityFromFragmentExtracts(anchorEntity, normalizedXpath);
             }
-
-            return fragmentRepository.getByDataspaceAndAnchorAndXpath(
-                    dataspaceEntity, anchorEntity, normalizedXpath);
+            if (fragmentEntity == null) {
+                throw new DataNodeNotFoundException(dataspaceEntity.getName(), anchorEntity.getName(), xpath);
+            }
+            return fragmentEntity;
         }
     }
 
+    private FragmentEntity buildFragmentEntityFromFragmentExtracts(final AnchorEntity anchorEntity,
+                                                                   final String normalizedXpath) {
+        final FragmentEntity fragmentEntity;
+        final List<FragmentExtract> fragmentExtracts =
+                fragmentRepository.findByAnchorIdAndParentXpath(anchorEntity.getId(), normalizedXpath);
+        log.debug("Fetched {} fragment entities by anchor {} and cps path {}.",
+                fragmentExtracts.size(), anchorEntity.getName(), normalizedXpath);
+        fragmentEntity = FragmentEntityArranger.toFragmentEntityTree(anchorEntity, fragmentExtracts);
+        return fragmentEntity;
+    }
+
     @Override
     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
                                          final FetchDescendantsOption fetchDescendantsOption) {
@@ -259,9 +318,37 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
             fragmentEntities = ancestorXpaths.isEmpty() ? Collections.emptyList()
                     : fragmentRepository.findAllByAnchorAndXpathIn(anchorEntity, ancestorXpaths);
         }
-        return fragmentEntities.stream()
-                .map(fragmentEntity -> toDataNode(fragmentEntity, fetchDescendantsOption))
-                .collect(Collectors.toUnmodifiableList());
+        return createDataNodesFromFragmentEntities(fetchDescendantsOption, anchorEntity,
+                fragmentEntities);
+    }
+
+    private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
+                                                               final AnchorEntity anchorEntity,
+                                                               final List<FragmentEntity> fragmentEntities) {
+        final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
+        for (final FragmentEntity proxiedFragmentEntity : fragmentEntities) {
+            final DataNode dataNode;
+            if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
+                dataNode = toDataNode(proxiedFragmentEntity, fetchDescendantsOption);
+            } else {
+                final String normalizedXpath = getNormalizedXpath(proxiedFragmentEntity.getXpath());
+                final FragmentEntity unproxiedFragmentEntity = buildFragmentEntityFromFragmentExtracts(anchorEntity,
+                        normalizedXpath);
+                dataNode = toDataNode(unproxiedFragmentEntity, fetchDescendantsOption);
+            }
+            dataNodes.add(dataNode);
+        }
+        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
@@ -298,27 +385,16 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
     private DataNode toDataNode(final FragmentEntity fragmentEntity,
                                 final FetchDescendantsOption fetchDescendantsOption) {
         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
-        Map<String, Object> leaves = new HashMap<>();
+        Map<String, Serializable> leaves = new HashMap<>();
         if (fragmentEntity.getAttributes() != null) {
             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
         }
         return new DataNodeBuilder()
-                .withModuleNamePrefix(getFirstModuleName(fragmentEntity))
                 .withXpath(fragmentEntity.getXpath())
                 .withLeaves(leaves)
                 .withChildDataNodes(childDataNodes).build();
     }
 
-    private String getFirstModuleName(final FragmentEntity fragmentEntity) {
-        final SchemaSetEntity schemaSetEntity = fragmentEntity.getAnchor().getSchemaSet();
-        final Map<String, String> yangResourceNameToContent =
-                schemaSetEntity.getYangResources().stream().collect(
-                        Collectors.toMap(YangResourceEntity::getFileName, YangResourceEntity::getContent));
-        final SchemaContext schemaContext = YangTextSchemaSourceSetBuilder.of(yangResourceNameToContent)
-                .getSchemaContext();
-        return schemaContext.getModules().iterator().next().getName();
-    }
-
     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
                                              final FetchDescendantsOption fetchDescendantsOption) {
         if (fetchDescendantsOption.hasNext()) {
@@ -331,8 +407,8 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
 
     @Override
     public void updateDataLeaves(final String dataspaceName, final String anchorName, final String xpath,
-                                 final Map<String, Object> leaves) {
-        final FragmentEntity fragmentEntity = getFragmentByXpath(dataspaceName, anchorName, xpath);
+                                 final Map<String, Serializable> leaves) {
+        final FragmentEntity fragmentEntity = getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, xpath);
         fragmentEntity.setAttributes(jsonObjectMapper.asJsonString(leaves));
         fragmentRepository.save(fragmentEntity);
     }
@@ -340,7 +416,8 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
     @Override
     public void updateDataNodeAndDescendants(final String dataspaceName, final String anchorName,
                                              final DataNode dataNode) {
-        final FragmentEntity fragmentEntity = getFragmentByXpath(dataspaceName, anchorName, dataNode.getXpath());
+        final FragmentEntity fragmentEntity =
+            getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, dataNode.getXpath());
         updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode);
         try {
             fragmentRepository.save(fragmentEntity);
@@ -359,7 +436,8 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
         final Map<DataNode, FragmentEntity> dataNodeFragmentEntityMap = dataNodes.stream()
                 .collect(Collectors.toMap(
                         dataNode -> dataNode,
-                        dataNode -> getFragmentByXpath(dataspaceName, anchorName, dataNode.getXpath())));
+                        dataNode ->
+                            getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, dataNode.getXpath())));
         dataNodeFragmentEntityMap.forEach(
                 (dataNode, fragmentEntity) -> updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode));
         try {
@@ -419,7 +497,8 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
     @Transactional
     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
                                    final Collection<DataNode> newListElements) {
-        final FragmentEntity parentEntity = getFragmentByXpath(dataspaceName, anchorName, parentNodeXpath);
+        final FragmentEntity parentEntity =
+            getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
@@ -463,7 +542,7 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
                                 final boolean onlySupportListNodeDeletion) {
         final String parentNodeXpath;
         FragmentEntity parentFragmentEntity = null;
-        boolean targetDeleted = false;
+        boolean targetDeleted;
         if (isRootXpath(targetXpath)) {
             deleteDataNodes(dataspaceName, anchorName);
             targetDeleted = true;
@@ -473,7 +552,7 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
             } else {
                 parentNodeXpath = targetXpath.substring(0, targetXpath.lastIndexOf('/'));
             }
-            parentFragmentEntity = getFragmentByXpath(dataspaceName, anchorName, parentNodeXpath);
+            parentFragmentEntity = getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
             final String lastXpathElement = targetXpath.substring(targetXpath.lastIndexOf('/'));
             final boolean isListElement = REG_EX_PATTERN_FOR_LIST_ELEMENT_KEY_PREDICATE
                     .matcher(lastXpathElement).find();