Support for Patch across multiple data nodes

- Added new method updateMultipleDataLeaves to perform Update on
  multiple data nodes
- Deprecated singular method of update data node(updateDataLeaves)
- Refactored code where singular version was used
- Updated release notes

Issue-ID: CPS-1006
Signed-off-by: <as00745003@techmahindra.com>
Change-Id: If67280e2dd3ad566de9a8217489f168415e624bc

2 files changed, 31 insertions, 13 deletions

diff --git a/cps-ri/src/main/java/org/onap/cps/spi/entities/FragmentEntityArranger.java b/cps-ri/src/main/java/org/onap/cps/spi/entities/FragmentEntityArranger.java
index 49e2dd2530..b7ce98e1ac 100644
--- a/cps-ri/src/main/java/org/onap/cps/spi/entities/FragmentEntityArranger.java
+++ b/cps-ri/src/main/java/org/onap/cps/spi/entities/FragmentEntityArranger.java
@@ -1,6 +1,7 @@
 /*
  *  ============LICENSE_START=======================================================
  *  Copyright (C) 2022 Nordix Foundation
+ *  Modifications Copyright (C) 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.
@@ -40,9 +41,11 @@ public class FragmentEntityArranger {
     public static Collection<FragmentEntity> toFragmentEntityTrees(final AnchorEntity anchorEntity,
                                                       final Collection<FragmentExtract> fragmentExtracts) {
         final Map<Long, FragmentEntity> fragmentEntityPerId = new HashMap<>();
-        for (final FragmentExtract fragmentExtract : fragmentExtracts) {
-            final FragmentEntity fragmentEntity = toFragmentEntity(anchorEntity, fragmentExtract);
-            fragmentEntityPerId.put(fragmentEntity.getId(), fragmentEntity);
+        if (fragmentExtracts !=  null) {
+            for (final FragmentExtract fragmentExtract : fragmentExtracts) {
+                final FragmentEntity fragmentEntity = toFragmentEntity(anchorEntity, fragmentExtract);
+                fragmentEntityPerId.put(fragmentEntity.getId(), fragmentEntity);
+            }
         }
         return reuniteChildrenWithTheirParents(fragmentEntityPerId);
     }
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 c26cd2fea8..3d2b87d7de 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
@@ -450,14 +450,25 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
     }
 
     @Override
-    public void updateDataLeaves(final String dataspaceName, final String anchorName, final String xpath,
-                                 final Map<String, Serializable> updateLeaves) {
+    public void batchUpdateDataLeaves(final String dataspaceName, final String anchorName,
+                                        final Map<String, Map<String, Serializable>> updatedLeavesPerXPath) {
         final AnchorEntity anchorEntity = getAnchorEntity(dataspaceName, anchorName);
-        final FragmentEntity fragmentEntity = getFragmentEntity(anchorEntity, xpath);
-        final String currentLeavesAsString = fragmentEntity.getAttributes();
-        final String mergedLeaves = mergeLeaves(updateLeaves, currentLeavesAsString);
-        fragmentEntity.setAttributes(mergedLeaves);
-        fragmentRepository.save(fragmentEntity);
+
+        final Collection<String> xpathsOfUpdatedLeaves = updatedLeavesPerXPath.keySet();
+        final Collection<FragmentEntity> fragmentEntities = getFragmentEntities(anchorEntity, xpathsOfUpdatedLeaves,
+                FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
+
+        for (final FragmentEntity fragmentEntity : fragmentEntities) {
+            final Map<String, Serializable> updatedLeaves = updatedLeavesPerXPath.get(fragmentEntity.getXpath());
+            final String mergedLeaves = mergeLeaves(updatedLeaves, fragmentEntity.getAttributes());
+            fragmentEntity.setAttributes(mergedLeaves);
+        }
+
+        try {
+            fragmentRepository.saveAll(fragmentEntities);
+        } catch (final StaleStateException staleStateException) {
+            retryUpdateDataNodesIndividually(anchorEntity, fragmentEntities);
+        }
     }
 
     @Override
@@ -687,9 +698,13 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
     }
 
     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);
+        Map<String, Serializable> currentLeavesAsMap = new HashMap<>();
+        if (currentLeavesAsString != null) {
+            currentLeavesAsMap = currentLeavesAsString.isEmpty()
+                    ? new HashMap<>() : jsonObjectMapper.convertJsonString(currentLeavesAsString, Map.class);
+            currentLeavesAsMap.putAll(updateLeaves);
+        }
+
         if (currentLeavesAsMap.isEmpty()) {
             return "";
         }