CPS-341 Support for multiple data tree instances under 1 anchor

	- Updated the parseJsonData method so it can parse JSON with multiple data trees, now it returns a ContainerNode
	- ContainerNode holds a collection of NormalizedNodes
	- Updated DataNodeBuilder and FragmentRepository as well to support collection of NormalizedNodes
	- Added new methods in CpsDataPersistenceService to store multiple Data Nodes
	- Added new test cases
	- Updated existing test cases and fixed code coverage
	- Addressed comments from previous patch

Issue-ID: CPS-341
Change-Id: Ie893e91c0fbfb139a1a406e962721b0f52412ced
Signed-off-by: arpitsingh <as00745003@techmahindra.com>

1 files changed, 42 insertions, 4 deletions

diff --git a/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java b/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java
index c725b4224e..b7da66e467 100644
--- a/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java
+++ b/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java
@@ -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.
@@ -89,6 +90,12 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
     }
 
     @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);
@@ -167,14 +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);
         }
     }