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

3 files changed, 52 insertions, 8 deletions

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 cde25a9f98..decf67d24e 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 7bdc2c166a..092fd31fcf 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 b27a2976d0..686f0f3fee 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