Performance Improvement: Batch Update DataNodes

Implemented methods to perform a batch operation on updating datanodes
Refactored replace data node(s) tree methods to update data node(s) and descendants

Issue-ID: CPS-1203
Signed-off-by: lukegleeson <luke.gleeson@est.tech>
Change-Id: I365d657422b19c9ce384110c9a23d041eaed06f4

11 files changed, 245 insertions, 79 deletions

diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/InventoryPersistence.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/InventoryPersistence.java
index 14fc6d698..c059ece0d 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/InventoryPersistence.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/InventoryPersistence.java
@@ -28,6 +28,8 @@ import static org.onap.cps.spi.FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS;
 
 import java.time.OffsetDateTime;
 import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.onap.cps.api.CpsDataService;
@@ -91,12 +93,27 @@ public class InventoryPersistence {
     public void saveCmHandleState(final String cmHandleId, final CompositeState compositeState) {
         final String cmHandleJsonData = String.format("{\"state\":%s}",
             jsonObjectMapper.asJsonString(compositeState));
-        cpsDataService.replaceNodeTree(NCMP_DATASPACE_NAME, NCMP_DMI_REGISTRY_ANCHOR,
+        cpsDataService.updateDataNodeAndDescendants(NCMP_DATASPACE_NAME, NCMP_DMI_REGISTRY_ANCHOR,
             String.format(CM_HANDLE_XPATH_TEMPLATE, cmHandleId),
             cmHandleJsonData, OffsetDateTime.now());
     }
 
     /**
+     * Save all cm handles states in batch.
+     *
+     * @param cmHandleStates contains cm handle id and updated state
+     */
+    public void saveCmHandleStates(final Map<String, CompositeState> cmHandleStates) {
+        final Map<String, String> cmHandlesJsonDataMap = new HashMap<>();
+        cmHandleStates.entrySet().stream().forEach(cmHandleEntry ->
+            cmHandlesJsonDataMap.put(String.format(CM_HANDLE_XPATH_TEMPLATE, cmHandleEntry.getKey()),
+                String.format("{\"state\":%s}",
+                    jsonObjectMapper.asJsonString(cmHandleEntry.getValue()))));
+        cpsDataService.updateDataNodesAndDescendants(NCMP_DATASPACE_NAME, NCMP_DMI_REGISTRY_ANCHOR,
+            cmHandlesJsonDataMap, OffsetDateTime.now());
+    }
+
+    /**
      * This method retrieves DMI service name, DMI properties and the state for a given cm handle.
      * @param cmHandleId the id of the cm handle
      * @return yang model cm handle
diff --git a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/inventory/InventoryPersistenceSpec.groovy b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/inventory/InventoryPersistenceSpec.groovy
index f9ca676f3..7ffec1ab0 100644
--- a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/inventory/InventoryPersistenceSpec.groovy
+++ b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/inventory/InventoryPersistenceSpec.groovy
@@ -43,7 +43,6 @@ import java.time.format.DateTimeFormatter
 
 import static org.onap.cps.ncmp.api.impl.constants.DmiRegistryConstants.NO_TIMESTAMP
 import static org.onap.cps.spi.FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS
-import static org.onap.cps.spi.FetchDescendantsOption.OMIT_DESCENDANTS
 
 class InventoryPersistenceSpec extends Specification {
 
@@ -146,7 +145,7 @@ class InventoryPersistenceSpec extends Specification {
         when: 'update cm handle state is invoked with the #scenario state'
             objectUnderTest.saveCmHandleState(cmHandleId, compositeState)
         then: 'update node leaves is invoked with the correct params'
-            1 * mockCpsDataService.replaceNodeTree('NCMP-Admin', 'ncmp-dmi-registry', '/dmi-registry/cm-handles[@id=\'Some-Cm-Handle\']', expectedJsonData, _ as OffsetDateTime)
+            1 * mockCpsDataService.updateDataNodeAndDescendants('NCMP-Admin', 'ncmp-dmi-registry', '/dmi-registry/cm-handles[@id=\'Some-Cm-Handle\']', expectedJsonData, _ as OffsetDateTime)
         where: 'the following states are used'
             scenario    | cmHandleState          || expectedJsonData
             'READY'     | CmHandleState.READY    || '{"state":{"cm-handle-state":"READY","last-update-time":"2022-12-31T20:30:40.000+0000"}}'
@@ -154,6 +153,22 @@ class InventoryPersistenceSpec extends Specification {
             'DELETING'  | CmHandleState.DELETING || '{"state":{"cm-handle-state":"DELETING","last-update-time":"2022-12-31T20:30:40.000+0000"}}'
     }
 
+    def 'Update Cm Handles with #scenario States'() {
+        given: 'a map of cm handles composite states'
+            def compositeState1 = new CompositeState(cmHandleState: cmHandleState, lastUpdateTime: formattedDateAndTime)
+            def compositeState2 = new CompositeState(cmHandleState: cmHandleState, lastUpdateTime: formattedDateAndTime)
+        when: 'update cm handle state is invoked with the #scenario state'
+            def cmHandleStateMap = ['Some-Cm-Handle1' : compositeState1, 'Some-Cm-Handle2' : compositeState2]
+            objectUnderTest.saveCmHandleStates(cmHandleStateMap)
+        then: 'update node leaves is invoked with the correct params'
+            1 * mockCpsDataService.updateDataNodesAndDescendants('NCMP-Admin', 'ncmp-dmi-registry', cmHandlesJsonDataMap, _ as OffsetDateTime)
+        where: 'the following states are used'
+            scenario    | cmHandleState          || cmHandlesJsonDataMap
+            'READY'     | CmHandleState.READY    || ['/dmi-registry/cm-handles[@id=\'Some-Cm-Handle1\']':'{"state":{"cm-handle-state":"READY","last-update-time":"2022-12-31T20:30:40.000+0000"}}', '/dmi-registry/cm-handles[@id=\'Some-Cm-Handle2\']':'{"state":{"cm-handle-state":"READY","last-update-time":"2022-12-31T20:30:40.000+0000"}}']
+            'LOCKED'    | CmHandleState.LOCKED   || ['/dmi-registry/cm-handles[@id=\'Some-Cm-Handle1\']':'{"state":{"cm-handle-state":"LOCKED","last-update-time":"2022-12-31T20:30:40.000+0000"}}', '/dmi-registry/cm-handles[@id=\'Some-Cm-Handle2\']':'{"state":{"cm-handle-state":"LOCKED","last-update-time":"2022-12-31T20:30:40.000+0000"}}']
+            'DELETING'  | CmHandleState.DELETING || ['/dmi-registry/cm-handles[@id=\'Some-Cm-Handle1\']':'{"state":{"cm-handle-state":"DELETING","last-update-time":"2022-12-31T20:30:40.000+0000"}}', '/dmi-registry/cm-handles[@id=\'Some-Cm-Handle2\']':'{"state":{"cm-handle-state":"DELETING","last-update-time":"2022-12-31T20:30:40.000+0000"}}']
+    }
+
     def 'Get module definitions'() {
         given: 'cps module service returns a collection of module definitions'
             def moduleDefinitions = [new ModuleDefinition('moduleName','revision','content')]
diff --git a/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java b/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java
index b78d38339..8dea2c02c 100755
--- a/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java
+++ b/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java
@@ -101,7 +101,7 @@ public class DataRestController implements CpsDataApi {
     public ResponseEntity<Object> replaceNode(final String dataspaceName, final String anchorName,
         final Object jsonData, final String parentNodeXpath, final String observedTimestamp) {
         cpsDataService
-                .replaceNodeTree(dataspaceName, anchorName, parentNodeXpath,
+                .updateDataNodeAndDescendants(dataspaceName, anchorName, parentNodeXpath,
                         jsonObjectMapper.asJsonString(jsonData), toOffsetDateTime(observedTimestamp));
         return new ResponseEntity<>(HttpStatus.OK);
     }
diff --git a/cps-rest/src/test/groovy/org/onap/cps/rest/controller/DataRestControllerSpec.groovy b/cps-rest/src/test/groovy/org/onap/cps/rest/controller/DataRestControllerSpec.groovy
index 6f415bd45..75a3fcf00 100755
--- a/cps-rest/src/test/groovy/org/onap/cps/rest/controller/DataRestControllerSpec.groovy
+++ b/cps-rest/src/test/groovy/org/onap/cps/rest/controller/DataRestControllerSpec.groovy
@@ -273,7 +273,7 @@ class DataRestControllerSpec extends Specification {
                         .param('xpath', inputXpath))
                     .andReturn().response
         then: 'the service method is invoked with expected parameters'
-            1 * mockCpsDataService.replaceNodeTree(dataspaceName, anchorName, xpathServiceParameter, expectedJsonData, noTimestamp)
+            1 * mockCpsDataService.updateDataNodeAndDescendants(dataspaceName, anchorName, xpathServiceParameter, expectedJsonData, noTimestamp)
         and: 'response status indicates success'
             response.status == HttpStatus.OK.value()
         where:
@@ -283,7 +283,7 @@ class DataRestControllerSpec extends Specification {
             'some xpath by parent' | '/some/xpath' || '/some/xpath'
     }
 
-    def 'Replace data node tree with observedTimestamp.'() {
+    def 'Update data node and descendants with observedTimestamp.'() {
         given: 'endpoint to replace node'
             def endpoint = "$dataNodeBaseEndpoint/anchors/$anchorName/nodes"
         when: 'put request is performed'
@@ -296,7 +296,7 @@ class DataRestControllerSpec extends Specification {
                         .param('observed-timestamp', observedTimestamp))
                     .andReturn().response
         then: 'the service method is invoked with expected parameters'
-            expectedApiCount * mockCpsDataService.replaceNodeTree(dataspaceName, anchorName, '/', expectedJsonData,
+            expectedApiCount * mockCpsDataService.updateDataNodeAndDescendants(dataspaceName, anchorName, '/', expectedJsonData,
                 { it == DateTimeUtility.toOffsetDateTime(observedTimestamp) })
         and: 'response status indicates success'
             response.status == expectedHttpStatus.value()
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 944335598..c4a2c2fe9 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
@@ -26,6 +26,7 @@ import static org.onap.cps.spi.FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS;
 
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.ImmutableSet.Builder;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -104,14 +105,16 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
                                    final Collection<DataNode> newChildren) {
         final FragmentEntity parentFragmentEntity = getFragmentByXpath(dataspaceName, anchorName, parentNodeXpath);
         try {
-            for (final DataNode newChildAsDataNode : newChildren) {
+            final List<FragmentEntity> fragmentEntities = new ArrayList<>();
+            newChildren.forEach(newChildAsDataNode -> {
                 final FragmentEntity newChildAsFragmentEntity = convertToFragmentWithAllDescendants(
-                        parentFragmentEntity.getDataspace(),
-                        parentFragmentEntity.getAnchor(),
-                        newChildAsDataNode);
+                    parentFragmentEntity.getDataspace(),
+                    parentFragmentEntity.getAnchor(),
+                    newChildAsDataNode);
                 newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
-                fragmentRepository.save(newChildAsFragmentEntity);
-            }
+                fragmentEntities.add(newChildAsFragmentEntity);
+            });
+            fragmentRepository.saveAll(fragmentEntities);
         } catch (final DataIntegrityViolationException exception) {
             final List<String> conflictXpaths = newChildren.stream()
                     .map(DataNode::getXpath)
@@ -288,9 +291,10 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
     }
 
     @Override
-    public void replaceDataNodeTree(final String dataspaceName, final String anchorName, final DataNode dataNode) {
+    public void updateDataNodeAndDescendants(final String dataspaceName, final String anchorName,
+                                             final DataNode dataNode) {
         final FragmentEntity fragmentEntity = getFragmentByXpath(dataspaceName, anchorName, dataNode.getXpath());
-        replaceDataNodeTree(fragmentEntity, dataNode);
+        updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode);
         try {
             fragmentRepository.save(fragmentEntity);
         } catch (final StaleStateException staleStateException) {
@@ -301,8 +305,27 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
         }
     }
 
-    private void replaceDataNodeTree(final FragmentEntity existingFragmentEntity,
-                                     final DataNode newDataNode) {
+    @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 -> getFragmentByXpath(dataspaceName, anchorName, dataNode.getXpath())));
+        dataNodeFragmentEntityMap.forEach(
+            (dataNode, fragmentEntity) -> updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode));
+        try {
+            fragmentRepository.saveAll(dataNodeFragmentEntityMap.values());
+        } catch (final StaleStateException staleStateException) {
+            throw new ConcurrencyException("Concurrent Transactions",
+                String.format("A data node in dataspace :'%s' with Anchor : '%s' is updated by another transaction.",
+                    dataspaceName, anchorName),
+                staleStateException);
+        }
+    }
+
+    private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
+                                                                final DataNode newDataNode) {
 
         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 
@@ -318,10 +341,11 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
                         existingFragmentEntity.getDataspace(), existingFragmentEntity.getAnchor(), newDataNodeChild);
             } else {
                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
-                replaceDataNodeTree(childFragment, newDataNodeChild);
+                updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
             }
             updatedChildFragments.add(childFragment);
         }
+
         existingFragmentEntity.getChildFragments().clear();
         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
     }
@@ -457,7 +481,7 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
             existingListElementEntity.getChildFragments().clear();
         } else {
-            replaceDataNodeTree(existingListElementEntity, newListElement);
+            updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
         }
         return existingListElementEntity;
     }
diff --git a/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceIntegrationSpec.groovy b/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceIntegrationSpec.groovy
index 6f780fc50..fee489d18 100755
--- a/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceIntegrationSpec.groovy
+++ b/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceIntegrationSpec.groovy
@@ -55,8 +55,8 @@ class CpsDataPersistenceServiceIntegrationSpec extends CpsPersistenceSpecBase {
     static final long ID_DATA_NODE_WITH_DESCENDANTS = 4001
     static final String XPATH_DATA_NODE_WITH_DESCENDANTS = '/parent-1'
     static final String XPATH_DATA_NODE_WITH_LEAVES = '/parent-100'
-    static final long UPDATE_DATA_NODE_FRAGMENT_ID = 4202L
-    static final long UPDATE_DATA_NODE_SUB_FRAGMENT_ID = 4203L
+    static final long DATA_NODE_202_FRAGMENT_ID = 4202L
+    static final long CHILD_OF_DATA_NODE_202_FRAGMENT_ID = 4203L
     static final long LIST_DATA_NODE_PARENT201_FRAGMENT_ID = 4206L
     static final long LIST_DATA_NODE_PARENT203_FRAGMENT_ID = 4214L
     static final long LIST_DATA_NODE_PARENT202_FRAGMENT_ID = 4211L
@@ -258,14 +258,14 @@ class CpsDataPersistenceServiceIntegrationSpec extends CpsPersistenceSpecBase {
             objectUnderTest.updateDataLeaves(DATASPACE_NAME, ANCHOR_FOR_DATA_NODES_WITH_LEAVES,
                     "/parent-200/child-201", ['leaf-value': 'new'])
         then: 'leaves are updated for selected data node'
-            def updatedFragment = fragmentRepository.getById(UPDATE_DATA_NODE_FRAGMENT_ID)
+            def updatedFragment = fragmentRepository.getById(DATA_NODE_202_FRAGMENT_ID)
             def updatedLeaves = getLeavesMap(updatedFragment)
             assert updatedLeaves.size() == 1
             assert updatedLeaves.'leaf-value' == 'new'
         and: 'existing child entry remains as is'
             def childFragment = updatedFragment.childFragments.iterator().next()
             def childLeaves = getLeavesMap(childFragment)
-            assert childFragment.id == UPDATE_DATA_NODE_SUB_FRAGMENT_ID
+            assert childFragment.id == CHILD_OF_DATA_NODE_202_FRAGMENT_ID
             assert childLeaves.'leaf-value' == 'original'
     }
 
@@ -283,32 +283,32 @@ class CpsDataPersistenceServiceIntegrationSpec extends CpsPersistenceSpecBase {
     }
 
     @Sql([CLEAR_DATA, SET_DATA])
-    def 'Replace data node tree with descendants removal.'() {
+    def 'Update data node and descendants by removing descendants.'() {
         given: 'data node object with leaves updated, no children'
             def submittedDataNode = buildDataNode("/parent-200/child-201", ['leaf-value': 'new'], [])
-        when: 'replace data node tree is performed'
-            objectUnderTest.replaceDataNodeTree(DATASPACE_NAME, ANCHOR_FOR_DATA_NODES_WITH_LEAVES, submittedDataNode)
+        when: 'update data nodes and descendants is performed'
+            objectUnderTest.updateDataNodeAndDescendants(DATASPACE_NAME, ANCHOR_FOR_DATA_NODES_WITH_LEAVES, submittedDataNode)
         then: 'leaves have been updated for selected data node'
-            def updatedFragment = fragmentRepository.getById(UPDATE_DATA_NODE_FRAGMENT_ID)
+            def updatedFragment = fragmentRepository.getById(DATA_NODE_202_FRAGMENT_ID)
             def updatedLeaves = getLeavesMap(updatedFragment)
             assert updatedLeaves.size() == 1
             assert updatedLeaves.'leaf-value' == 'new'
         and: 'updated entry has no children'
             updatedFragment.childFragments.isEmpty()
         and: 'previously attached child entry is removed from database'
-            fragmentRepository.findById(UPDATE_DATA_NODE_SUB_FRAGMENT_ID).isEmpty()
+            fragmentRepository.findById(CHILD_OF_DATA_NODE_202_FRAGMENT_ID).isEmpty()
     }
 
     @Sql([CLEAR_DATA, SET_DATA])
-    def 'Replace data node tree with descendants.'() {
+    def 'Update data node and descendants with new descendants'() {
         given: 'data node object with leaves updated, having child with old content'
             def submittedDataNode = buildDataNode("/parent-200/child-201", ['leaf-value': 'new'], [
                   buildDataNode("/parent-200/child-201/grand-child", ['leaf-value': 'original'], [])
             ])
         when: 'update is performed including descendants'
-            objectUnderTest.replaceDataNodeTree(DATASPACE_NAME, ANCHOR_FOR_DATA_NODES_WITH_LEAVES, submittedDataNode)
+            objectUnderTest.updateDataNodeAndDescendants(DATASPACE_NAME, ANCHOR_FOR_DATA_NODES_WITH_LEAVES, submittedDataNode)
         then: 'leaves have been updated for selected data node'
-            def updatedFragment = fragmentRepository.getById(UPDATE_DATA_NODE_FRAGMENT_ID)
+            def updatedFragment = fragmentRepository.getById(DATA_NODE_202_FRAGMENT_ID)
             def updatedLeaves = getLeavesMap(updatedFragment)
             assert updatedLeaves.size() == 1
             assert updatedLeaves.'leaf-value' == 'new'
@@ -320,15 +320,15 @@ class CpsDataPersistenceServiceIntegrationSpec extends CpsPersistenceSpecBase {
     }
 
     @Sql([CLEAR_DATA, SET_DATA])
-    def 'Replace data node tree with same descendants but changed leaf value.'() {
+    def 'Update data node and descendants with same descendants but changed leaf value.'() {
         given: 'data node object with leaves updated, having child with old content'
             def submittedDataNode = buildDataNode("/parent-200/child-201", ['leaf-value': 'new'], [
                     buildDataNode("/parent-200/child-201/grand-child", ['leaf-value': 'new'], [])
             ])
         when: 'update is performed including descendants'
-            objectUnderTest.replaceDataNodeTree(DATASPACE_NAME, ANCHOR_FOR_DATA_NODES_WITH_LEAVES, submittedDataNode)
+            objectUnderTest.updateDataNodeAndDescendants(DATASPACE_NAME, ANCHOR_FOR_DATA_NODES_WITH_LEAVES, submittedDataNode)
         then: 'leaves have been updated for selected data node'
-            def updatedFragment = fragmentRepository.getById(UPDATE_DATA_NODE_FRAGMENT_ID)
+            def updatedFragment = fragmentRepository.getById(DATA_NODE_202_FRAGMENT_ID)
             def updatedLeaves = getLeavesMap(updatedFragment)
             assert updatedLeaves.size() == 1
             assert updatedLeaves.'leaf-value' == 'new'
@@ -340,20 +340,20 @@ class CpsDataPersistenceServiceIntegrationSpec extends CpsPersistenceSpecBase {
     }
 
     @Sql([CLEAR_DATA, SET_DATA])
-    def 'Replace data node tree with different descendants xpath'() {
+    def 'Update data node and descendants with different descendants xpath'() {
         given: 'data node object with leaves updated, having child with old content'
             def submittedDataNode = buildDataNode("/parent-200/child-201", ['leaf-value': 'new'], [
                     buildDataNode("/parent-200/child-201/grand-child-new", ['leaf-value': 'new'], [])
             ])
         when: 'update is performed including descendants'
-            objectUnderTest.replaceDataNodeTree(DATASPACE_NAME, ANCHOR_FOR_DATA_NODES_WITH_LEAVES, submittedDataNode)
+            objectUnderTest.updateDataNodeAndDescendants(DATASPACE_NAME, ANCHOR_FOR_DATA_NODES_WITH_LEAVES, submittedDataNode)
         then: 'leaves have been updated for selected data node'
-            def updatedFragment = fragmentRepository.getById(UPDATE_DATA_NODE_FRAGMENT_ID)
+            def updatedFragment = fragmentRepository.getById(DATA_NODE_202_FRAGMENT_ID)
             def updatedLeaves = getLeavesMap(updatedFragment)
             assert updatedLeaves.size() == 1
             assert updatedLeaves.'leaf-value' == 'new'
         and: 'previously attached child entry is removed from database'
-            fragmentRepository.findById(UPDATE_DATA_NODE_SUB_FRAGMENT_ID).isEmpty()
+            fragmentRepository.findById(CHILD_OF_DATA_NODE_202_FRAGMENT_ID).isEmpty()
         and: 'new child entry is persisted'
             def childFragment = updatedFragment.childFragments.iterator().next()
             childFragment.xpath == '/parent-200/child-201/grand-child-new'
@@ -362,11 +362,11 @@ class CpsDataPersistenceServiceIntegrationSpec extends CpsPersistenceSpecBase {
     }
 
     @Sql([CLEAR_DATA, SET_DATA])
-    def 'Replace data node tree error scenario: #scenario.'() {
+    def 'Update data node and descendants error scenario: #scenario.'() {
         given: 'data node object'
             def submittedDataNode = buildDataNode(xpath, ['leaf-name': 'leaf-value'], [])
         when: 'attempt to update data node for #scenario'
-            objectUnderTest.replaceDataNodeTree(dataspaceName, anchorName, submittedDataNode)
+            objectUnderTest.updateDataNodeAndDescendants(dataspaceName, anchorName, submittedDataNode)
         then: 'a #expectedException is thrown'
             thrown(expectedException)
         where: 'the following data is used'
diff --git a/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceSpec.groovy b/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceSpec.groovy
index bde2f3de9..1bbf358e5 100644
--- a/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceSpec.groovy
+++ b/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceSpec.groovy
@@ -28,6 +28,7 @@ import org.onap.cps.spi.entities.SchemaSetEntity
 import org.onap.cps.spi.entities.YangResourceEntity
 import org.onap.cps.spi.exceptions.ConcurrencyException
 import org.onap.cps.spi.exceptions.DataValidationException
+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
@@ -67,40 +68,40 @@ class CpsDataPersistenceServiceSpec extends Specification {
     )] as Set
 
 
-    def 'Handling of StaleStateException (caused by concurrent updates) during data node tree update.'() {
-
-        def parentXpath = '/parent-01'
-        def myDataspaceName = 'my-dataspace'
-        def myAnchorName = 'my-anchor'
-
-        given: 'data node object'
-            def submittedDataNode = new DataNodeBuilder()
-                    .withXpath(parentXpath)
-                    .withLeaves(['leaf-name': 'leaf-value'])
-                    .build()
-        and: 'fragment to be updated'
-            mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, _) >> {
+    def 'Handling of StaleStateException (caused by concurrent updates) during update data node and descendants.'() {
+        given: 'the fragment repository returns a fragment entity'
+            mockFragmentRepository.getByDataspaceAndAnchorAndXpath(*_) >> {
                 def fragmentEntity = new FragmentEntity()
-                fragmentEntity.setXpath(parentXpath)
-                fragmentEntity.setChildFragments(Collections.emptySet())
+                fragmentEntity.setChildFragments([new FragmentEntity()] as Set<FragmentEntity>)
                 return fragmentEntity
             }
-        and: 'data node is concurrently updated by another transaction'
+        and: 'a data node is concurrently updated by another transaction'
             mockFragmentRepository.save(_) >> { throw new StaleStateException("concurrent updates") }
+        when: 'attempt to update data node with submitted data nodes'
+            objectUnderTest.updateDataNodeAndDescendants('some-dataspace', 'some-anchor', new DataNodeBuilder().withXpath('/some/xpath').build())
+        then: 'concurrency exception is thrown'
+            def concurrencyException = thrown(ConcurrencyException)
+            assert concurrencyException.getDetails().contains('some-dataspace')
+            assert concurrencyException.getDetails().contains('some-anchor')
+            assert concurrencyException.getDetails().contains('/some/xpath')
+    }
 
-        when: 'attempt to update data node'
-            objectUnderTest.replaceDataNodeTree(myDataspaceName, myAnchorName, submittedDataNode)
-
+    def 'Handling of StaleStateException (caused by concurrent updates) during  update data nodes and descendants.'() {
+        given: 'the fragment repository returns a list of fragment entities'
+            mockFragmentRepository.getByDataspaceAndAnchorAndXpath(*_) >> new FragmentEntity()
+        and: 'a data node is concurrently updated by another transaction'
+            mockFragmentRepository.saveAll(*_) >> { throw new StaleStateException("concurrent updates") }
+        when: 'attempt to update data node with submitted data nodes'
+            objectUnderTest.updateDataNodesAndDescendants('some-dataspace', 'some-anchor', [])
         then: 'concurrency exception is thrown'
             def concurrencyException = thrown(ConcurrencyException)
-            assert concurrencyException.getDetails().contains(myDataspaceName)
-            assert concurrencyException.getDetails().contains(myAnchorName)
-            assert concurrencyException.getDetails().contains(parentXpath)
+            assert concurrencyException.getDetails().contains('some-dataspace')
+            assert concurrencyException.getDetails().contains('some-anchor')
     }
 
     def 'Retrieving a data node with a property JSON value of #scenario'() {
         given: 'a fragment with a property JSON value of #scenario'
-        mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, _) >> {
+        mockFragmentRepository.getByDataspaceAndAnchorAndXpath(*_) >> {
             new FragmentEntity(childFragments: Collections.emptySet(),
                     attributes: "{\"some attribute\": ${dataString}}",
                     anchor: new AnchorEntity(schemaSet: new SchemaSetEntity(yangResources: yangResourceSet )))
@@ -128,11 +129,11 @@ class CpsDataPersistenceServiceSpec extends Specification {
 
     def 'Retrieving a data node with invalid JSON'() {
         given: 'a fragment with invalid JSON'
-            mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, _) >> {
+            mockFragmentRepository.getByDataspaceAndAnchorAndXpath(*_) >> {
                 new FragmentEntity(childFragments: Collections.emptySet(), attributes: '{invalid json')
             }
         when: 'getting the data node represented by this fragment'
-            def dataNode = objectUnderTest.getDataNode('my-dataspace', 'my-anchor',
+            objectUnderTest.getDataNode('my-dataspace', 'my-anchor',
                     '/parent-01', FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS)
         then: 'a data validation exception is thrown'
             thrown(DataValidationException)
@@ -160,4 +161,36 @@ class CpsDataPersistenceServiceSpec extends Specification {
         then: 'the session manager method to lock anchor is invoked with same parameters'
             1 * mockSessionManager.lockAnchor('mySessionId', 'myDataspaceName', 'myAnchorName', 123L)
     }
+
+    def 'update data node and descendants: #scenario'(){
+        given: 'mocked responses'
+            mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, '/test/xpath') >> new FragmentEntity(xpath: '/test/xpath', childFragments: [])
+        when: 'replace data node tree'
+            objectUnderTest.updateDataNodesAndDescendants('dataspaceName', 'anchorName', dataNodes)
+        then: 'call fragment repository save all method'
+            1 * mockFragmentRepository.saveAll({fragmentEntities -> assert fragmentEntities as List == expectedFragmentEntities})
+        where: 'the following Data Type is passed'
+            scenario                         | dataNodes                                                                          || expectedFragmentEntities
+            'empty data node list'           | []                                                                                 || []
+            'one data node in list'          | [new DataNode(xpath: '/test/xpath', leaves: ['id': 'testId'], childDataNodes: [])] || [new FragmentEntity(xpath: '/test/xpath', attributes: '{"id":"testId"}', childFragments: [])]
+    }
+
+    def 'update data nodes and descendants'() {
+        given: 'the fragment repository returns a fragment entity related to the xpath input'
+            mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, '/test/xpath1') >> new FragmentEntity(xpath: '/test/xpath1', childFragments: [])
+            mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, '/test/xpath2') >> new FragmentEntity(xpath: '/test/xpath2', childFragments: [])
+        and: 'some data nodes with descendants'
+            def dataNode1 = new DataNode(xpath: '/test/xpath1', leaves: ['id': 'testId1'], childDataNodes: [new DataNode(xpath: '/test/xpath1/child', leaves: ['id': 'childTestId1'])])
+            def dataNode2 = new DataNode(xpath: '/test/xpath2', leaves: ['id': 'testId2'], childDataNodes: [new DataNode(xpath: '/test/xpath2/child', leaves: ['id': 'childTestId2'])])
+        when: 'the fragment entities are update by the data nodes'
+            objectUnderTest.updateDataNodesAndDescendants('dataspaceName', 'anchorName', [dataNode1, dataNode2])
+        then: 'call fragment repository save all method is called with the updated fragments'
+            1 * mockFragmentRepository.saveAll({fragmentEntities -> {
+                fragmentEntities.containsAll([
+                    new FragmentEntity(xpath: '/test/xpath1', attributes: '{"id":"testId1"}', childFragments: [new FragmentEntity(xpath: '/test/xpath1/child', attributes: '{"id":"childTestId1"}', childFragments: [])]),
+                    new FragmentEntity(xpath: '/test/xpath2', attributes: '{"id":"testId2"}', childFragments: [new FragmentEntity(xpath: '/test/xpath2/child', attributes: '{"id":"childTestId2"}', childFragments: [])])
+                ])
+                assert fragmentEntities.size() == 2
+            }})
+    }
 }
\ No newline at end of file
diff --git a/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java b/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
index cde25a9f9..decf67d24 100644
--- a/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
+++ b/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
@@ -24,6 +24,7 @@ package org.onap.cps.api;
 
 import java.time.OffsetDateTime;
 import java.util.Collection;
+import java.util.Map;
 import org.onap.cps.spi.FetchDescendantsOption;
 import org.onap.cps.spi.model.DataNode;
 
@@ -93,7 +94,7 @@ public interface CpsDataService {
         OffsetDateTime observedTimestamp);
 
     /**
-     * Replaces existing data node content including descendants.
+     * Replaces an existing data node's content including descendants.
      *
      * @param dataspaceName   dataspace name
      * @param anchorName      anchor name
@@ -101,8 +102,19 @@ public interface CpsDataService {
      * @param jsonData        json data
      * @param observedTimestamp observedTimestamp
      */
-    void replaceNodeTree(String dataspaceName, String anchorName, String parentNodeXpath, String jsonData,
-        OffsetDateTime observedTimestamp);
+    void updateDataNodeAndDescendants(String dataspaceName, String anchorName, String parentNodeXpath, String jsonData,
+                                       OffsetDateTime observedTimestamp);
+
+    /**
+     * Replaces multiple existing data nodes' content including descendants in a batch operation.
+     *
+     * @param dataspaceName   dataspace name
+     * @param anchorName      anchor name
+     * @param nodesJsonData   map of xpath and node JSON data
+     * @param observedTimestamp observedTimestamp
+     */
+    void updateDataNodesAndDescendants(String dataspaceName, String anchorName, Map<String, String> nodesJsonData,
+                                       OffsetDateTime observedTimestamp);
 
     /**
      * Replaces list content by removing all existing elements and inserting the given new elements as json
diff --git a/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java b/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
index 7bdc2c166..092fd31fc 100755
--- a/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
+++ b/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
@@ -28,6 +28,9 @@ import static org.onap.cps.notification.Operation.UPDATE;
 
 import java.time.OffsetDateTime;
 import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
 import lombok.AllArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.onap.cps.api.CpsAdminService;
@@ -142,15 +145,28 @@ public class CpsDataServiceImpl implements CpsDataService {
     }
 
     @Override
-    public void replaceNodeTree(final String dataspaceName, final String anchorName, final String parentNodeXpath,
-        final String jsonData, final OffsetDateTime observedTimestamp) {
+    public void updateDataNodeAndDescendants(final String dataspaceName, final String anchorName,
+                                             final String parentNodeXpath, final String jsonData,
+                                             final OffsetDateTime observedTimestamp) {
         CpsValidator.validateNameCharacters(dataspaceName, anchorName);
         final DataNode dataNode = buildDataNode(dataspaceName, anchorName, parentNodeXpath, jsonData);
-        cpsDataPersistenceService.replaceDataNodeTree(dataspaceName, anchorName, dataNode);
+        cpsDataPersistenceService.updateDataNodeAndDescendants(dataspaceName, anchorName, dataNode);
         processDataUpdatedEventAsync(dataspaceName, anchorName, parentNodeXpath, UPDATE, observedTimestamp);
     }
 
     @Override
+    public void updateDataNodesAndDescendants(final String dataspaceName, final String anchorName,
+                                              final Map<String, String> nodesJsonData,
+                                              final OffsetDateTime observedTimestamp) {
+        CpsValidator.validateNameCharacters(dataspaceName, anchorName);
+        final List<DataNode> dataNodes = buildDataNodes(dataspaceName, anchorName, nodesJsonData);
+        cpsDataPersistenceService.updateDataNodesAndDescendants(dataspaceName, anchorName, dataNodes);
+        nodesJsonData.keySet().forEach(nodeXpath ->
+            processDataUpdatedEventAsync(dataspaceName, anchorName, nodeXpath,
+                UPDATE, observedTimestamp));
+    }
+
+    @Override
     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
             final String jsonData, final OffsetDateTime observedTimestamp) {
         CpsValidator.validateNameCharacters(dataspaceName, anchorName);
@@ -209,6 +225,13 @@ public class CpsDataServiceImpl implements CpsDataService {
             .build();
     }
 
+    private List<DataNode> buildDataNodes(final String dataspaceName, final String anchorName,
+                                          final Map<String, String> nodesJsonData) {
+        return nodesJsonData.entrySet().stream().map(nodeJsonData ->
+            buildDataNode(dataspaceName, anchorName, nodeJsonData.getKey(),
+                nodeJsonData.getValue())).collect(Collectors.toList());
+    }
+
     private Collection<DataNode> buildDataNodes(final String dataspaceName,
                                                 final String anchorName,
                                                 final String parentNodeXpath,
diff --git a/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java b/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
index b27a2976d..686f0f3fe 100644
--- a/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
+++ b/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
@@ -90,13 +90,22 @@ public interface CpsDataPersistenceService {
     void updateDataLeaves(String dataspaceName, String anchorName, String xpath, Map<String, Object> leaves);
 
     /**
-     * Replaces existing data node content including descendants.
+     * Replaces an existing data node's content including descendants.
      *
      * @param dataspaceName dataspace name
      * @param anchorName    anchor name
      * @param dataNode      data node
      */
-    void replaceDataNodeTree(String dataspaceName, String anchorName, DataNode dataNode);
+    void updateDataNodeAndDescendants(String dataspaceName, String anchorName, DataNode dataNode);
+
+    /**
+     * Replaces multiple existing data nodes' content including descendants in a batch operation.
+     *
+     * @param dataspaceName dataspace name
+     * @param anchorName    anchor name
+     * @param dataNodes     data nodes
+     */
+    void updateDataNodesAndDescendants(String dataspaceName, String anchorName, final List<DataNode> dataNodes);
 
     /**
      * Replaces list content by removing all existing elements and inserting the given new elements
diff --git a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy
index 6c995fa85..cb352bcce 100644
--- a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy
+++ b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy
@@ -262,13 +262,13 @@ class CpsDataServiceImplSpec extends Specification {
     }
 
 
-    def 'Replace data node: #scenario.'() {
+    def 'Replace data node using singular data node: #scenario.'() {
         given: 'schema set for given anchor and dataspace references test-tree model'
             setupSchemaSetMocks('test-tree.yang')
         when: 'replace data method is invoked with json data #jsonData and parent node xpath #parentNodeXpath'
-            objectUnderTest.replaceNodeTree(dataspaceName, anchorName, parentNodeXpath, jsonData, observedTimestamp)
+            objectUnderTest.updateDataNodeAndDescendants(dataspaceName, anchorName, parentNodeXpath, jsonData, observedTimestamp)
         then: 'the persistence service method is invoked with correct parameters'
-            1 * mockCpsDataPersistenceService.replaceDataNodeTree(dataspaceName, anchorName,
+            1 * mockCpsDataPersistenceService.updateDataNodeAndDescendants(dataspaceName, anchorName,
                 { dataNode -> dataNode.xpath == expectedNodeXpath })
         and: 'data updated event is sent to notification service'
             1 * mockNotificationService.processDataUpdatedEvent(dataspaceName, anchorName, parentNodeXpath, Operation.UPDATE, observedTimestamp)
@@ -278,13 +278,46 @@ class CpsDataServiceImplSpec extends Specification {
             'level 2 node'   | '/test-tree'    | '{"branch": [{"name":"Name"}]}' || '/test-tree/branch[@name=\'Name\']'
     }
 
-    def 'Replace data node with invalid #scenario.'() {
+    def 'Replace data node using multiple data nodes: #scenario.'() {
+        given: 'schema set for given anchor and dataspace references test-tree model'
+            setupSchemaSetMocks('test-tree.yang')
+        when: 'replace data method is invoked with a map of xpaths and json data'
+            objectUnderTest.updateDataNodesAndDescendants(dataspaceName, anchorName, nodesJsonData, observedTimestamp)
+        then: 'the persistence service method is invoked with correct parameters'
+            1 * mockCpsDataPersistenceService.updateDataNodesAndDescendants(dataspaceName, anchorName,
+                { dataNode -> dataNode.xpath == expectedNodeXpath})
+        and: 'data updated event is sent to notification service'
+            1 * mockNotificationService.processDataUpdatedEvent(dataspaceName, anchorName, nodesJsonData.keySet()[0], Operation.UPDATE, observedTimestamp)
+            1 * mockNotificationService.processDataUpdatedEvent(dataspaceName, anchorName, nodesJsonData.keySet()[1], Operation.UPDATE, observedTimestamp)
+        where: 'following parameters were used'
+            scenario         | nodesJsonData                                                                                                        || expectedNodeXpath
+            'top level node' | ['/' : '{"test-tree": {"branch": []}}', '/test-tree' : '{"branch": [{"name":"Name"}]}']                              || ["/test-tree", "/test-tree/branch[@name='Name']"]
+            'level 2 node'   | ['/test-tree' : '{"branch": [{"name":"Name"}]}', '/test-tree/branch[@name=\'Name\']':'{"nest":{"name":"nestName"}}'] || ["/test-tree/branch[@name='Name']", "/test-tree/branch[@name='Name']/nest"]
+    }
+
+    def 'Replace data node using singular data node with invalid #scenario.'() {
+        when: 'replace data method is invoked with invalid #scenario'
+            objectUnderTest.updateDataNodeAndDescendants(dataspaceName, anchorName, '/', _ as String, observedTimestamp)
+        then: 'a data validation exception is thrown'
+            thrown(DataValidationException)
+        and: 'the persistence service method is not invoked'
+            0 * mockCpsDataPersistenceService.updateDataNodeAndDescendants(*_)
+        and: 'data updated event is not sent to notification service'
+            0 * mockNotificationService.processDataUpdatedEvent(*_)
+        where: 'the following parameters are used'
+            scenario                    | dataspaceName                 | anchorName
+            'dataspace name'            | 'dataspace names with spaces' | 'anchorName'
+            'anchor name'               | 'dataspaceName'               | 'anchor name with spaces'
+            'dataspace and anchor name' | 'dataspace name with spaces'  | 'anchor name with spaces'
+    }
+
+    def 'Replace data node using multiple data nodes with invalid #scenario.'() {
         when: 'replace data method is invoked with invalid #scenario'
-            objectUnderTest.replaceNodeTree(dataspaceName, anchorName, '/', _ as String, observedTimestamp)
+            objectUnderTest.updateDataNodesAndDescendants(dataspaceName, anchorName, ['/': _ as String], observedTimestamp)
         then: 'a data validation exception is thrown'
             thrown(DataValidationException)
         and: 'the persistence service method is not invoked'
-            0 * mockCpsDataPersistenceService.replaceDataNodeTree(*_)
+            0 * mockCpsDataPersistenceService.updateDataNodesAndDescendants(*_)
         and: 'data updated event is not sent to notification service'
             0 * mockNotificationService.processDataUpdatedEvent(*_)
         where: 'the following parameters are used'