Performance Improvement:save cmhandles capability

- add saveCmHandleBatch in InventoryPersistence
- add saveListElementsBatch in CpsDataService
- have addListElementsBatch in CpsDataPersistenceService
- Test scenarios for the same

Issue-ID: CPS-1229
Issue-ID: CPS-1126
Change-Id: I0a1401818da5a4e523d7d0751cac6a526d1611b2
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>

4 files changed, 63 insertions, 0 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 decf67d24e..b2e8c5ba42 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
@@ -69,6 +69,19 @@ public interface CpsDataService {
         OffsetDateTime observedTimestamp);
 
     /**
+     * Persists child data fragment representing one or more list elements under existing data node for the
+     * given anchor and dataspace.
+     *
+     * @param dataspaceName     dataspace name
+     * @param anchorName        anchor name
+     * @param parentNodeXpath   parent node xpath
+     * @param jsonDataList      collection of json data representing list element(s)
+     * @param observedTimestamp observedTimestamp
+     */
+    void saveListElementsBatch(String dataspaceName, String anchorName, String parentNodeXpath,
+            Collection<String> jsonDataList, OffsetDateTime observedTimestamp);
+
+    /**
      * Retrieves datanode by XPath for given dataspace and anchor.
      *
      * @param dataspaceName          dataspace name
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 092fd31fcf..6bf493556e 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
@@ -92,6 +92,17 @@ public class CpsDataServiceImpl implements CpsDataService {
     }
 
     @Override
+    public void saveListElementsBatch(final String dataspaceName, final String anchorName, final String parentNodeXpath,
+            final Collection<String> jsonDataList, final OffsetDateTime observedTimestamp) {
+        CpsValidator.validateNameCharacters(dataspaceName, anchorName);
+        final Collection<Collection<DataNode>> listElementDataNodeCollections =
+                buildDataNodes(dataspaceName, anchorName, parentNodeXpath, jsonDataList);
+        cpsDataPersistenceService.addListElementsBatch(dataspaceName, anchorName, parentNodeXpath,
+                listElementDataNodeCollections);
+        processDataUpdatedEventAsync(dataspaceName, anchorName, parentNodeXpath, UPDATE, observedTimestamp);
+    }
+
+    @Override
     public DataNode getDataNode(final String dataspaceName, final String anchorName, final String xpath,
         final FetchDescendantsOption fetchDescendantsOption) {
         CpsValidator.validateNameCharacters(dataspaceName, anchorName);
@@ -252,6 +263,13 @@ public class CpsDataServiceImpl implements CpsDataService {
 
     }
 
+    private Collection<Collection<DataNode>> buildDataNodes(final String dataspaceName, final String anchorName,
+            final String parentNodeXpath, final Collection<String> jsonDataList) {
+        return jsonDataList.stream()
+                .map(jsonData -> buildDataNodes(dataspaceName, anchorName, parentNodeXpath, jsonData))
+                .collect(Collectors.toList());
+    }
+
     private void processDataUpdatedEventAsync(final String dataspaceName, final String anchorName, final String xpath,
             final Operation operation, final OffsetDateTime observedTimestamp) {
         try {
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 686f0f3fee..8b45ae78d9 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
@@ -66,6 +66,17 @@ public interface CpsDataPersistenceService {
         Collection<DataNode> listElementsCollection);
 
     /**
+     * Adds list child elements to a Fragment.
+     *
+     * @param dataspaceName           dataspace name
+     * @param anchorName              anchor name
+     * @param parentNodeXpath         parent node xpath
+     * @param listElementsCollections collections of data nodes representing list elements
+     */
+    void addListElementsBatch(String dataspaceName, String anchorName, String parentNodeXpath,
+            Collection<Collection<DataNode>> listElementsCollections);
+
+    /**
      * Retrieves datanode by XPath for given dataspace and anchor.
      *
      * @param dataspaceName          dataspace name
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 cb352bccec..ab960df6aa 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
@@ -37,6 +37,7 @@ import org.onap.cps.yang.YangTextSchemaSourceSetBuilder
 import spock.lang.Specification
 
 import java.time.OffsetDateTime
+import java.util.stream.Collectors
 
 class CpsDataServiceImplSpec extends Specification {
     def mockCpsDataPersistenceService = Mock(CpsDataPersistenceService)
@@ -135,6 +136,26 @@ class CpsDataServiceImplSpec extends Specification {
             1 * mockNotificationService.processDataUpdatedEvent(dataspaceName, anchorName, '/test-tree', Operation.UPDATE, observedTimestamp)
     }
 
+    def 'Saving collection of a batch with data fragment under existing node.'() {
+        given: 'schema set for given anchor and dataspace references test-tree model'
+            setupSchemaSetMocks('test-tree.yang')
+        when: 'save data method is invoked with list element json data'
+            def jsonData = '{"branch": [{"name": "A"}, {"name": "B"}]}'
+            objectUnderTest.saveListElementsBatch(dataspaceName, anchorName, '/test-tree', [jsonData], observedTimestamp)
+        then: 'the persistence service method is invoked with correct parameters'
+            1 * mockCpsDataPersistenceService.addListElementsBatch(dataspaceName, anchorName, '/test-tree',_) >> {
+                args -> {
+                    def listElementsCollection = args[3] as Collection<Collection<DataNode>>
+                    assert listElementsCollection.size() == 1
+                    def listOfXpaths = listElementsCollection.stream().flatMap(x -> x.stream()).map(it-> it.xpath).collect(Collectors.toList())
+                    assert listOfXpaths.size() == 2
+                    assert listOfXpaths.containsAll(['/test-tree/branch[@name=\'B\']','/test-tree/branch[@name=\'A\']'])
+                }
+            }
+        and: 'data updated event is sent to notification service'
+            1 * mockNotificationService.processDataUpdatedEvent(dataspaceName, anchorName, '/test-tree', Operation.UPDATE, observedTimestamp)
+    }
+
     def 'Saving empty list element data fragment.'() {
         given: 'schema set for given anchor and dataspace references test-tree model'
             setupSchemaSetMocks('test-tree.yang')