Fragment handling decreasing performance for large number of cmHandles

- allow fragmentEntity to set parent id (needed for optimization)
- updated addListAlement and addChildDataNode to use new common optimized metghod to add to exsiting children
- ensure methods are transactional
- Refactored test around adding list elements to clearly define test
  checking the presence of grandchild element

Issue-ID: CPS-886
Change-Id: Ic4381f0f7170ebd666d5bc8aa6ef2c4548d81766
Signed-off-by: DylanB95EST <dylan.byrne@est.tech>

3 files changed, 34 insertions, 45 deletions

diff --git a/cps-ri/src/main/java/org/onap/cps/spi/entities/FragmentEntity.java b/cps-ri/src/main/java/org/onap/cps/spi/entities/FragmentEntity.java
index 00d1d98df..2fdfa0528 100755
--- a/cps-ri/src/main/java/org/onap/cps/spi/entities/FragmentEntity.java
+++ b/cps-ri/src/main/java/org/onap/cps/spi/entities/FragmentEntity.java
@@ -70,6 +70,9 @@ public class FragmentEntity implements Serializable {
     @Column(columnDefinition = "text")
     private String xpath;
 
+    @Column(name = "parent_id")
+    private Long parentId;
+
     @Type(type = "jsonb")
     @Column(columnDefinition = "jsonb")
     private String attributes;
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 ed414fc30..04804726c 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
@@ -73,41 +73,38 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
 
     private final JsonObjectMapper jsonObjectMapper;
 
-
     private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@[\\s\\S]+?]){0,1})";
     private static final Pattern REG_EX_PATTERN_FOR_LIST_ELEMENT_KEY_PREDICATE =
             Pattern.compile("\\[(\\@([^\\/]{0,9999}))\\]$");
 
     @Override
-    public void addChildDataNode(final String dataspaceName, final String anchorName, final String parentXpath,
-        final DataNode dataNode) {
-        final FragmentEntity parentFragment = getFragmentByXpath(dataspaceName, anchorName, parentXpath);
-        final FragmentEntity fragmentEntity =
-            toFragmentEntity(parentFragment.getDataspace(), parentFragment.getAnchor(), dataNode);
-        parentFragment.getChildFragments().add(fragmentEntity);
-        try {
-            fragmentRepository.save(parentFragment);
-        } catch (final DataIntegrityViolationException exception) {
-            throw AlreadyDefinedException.forDataNode(dataNode.getXpath(), anchorName, exception);
-        }
+    @Transactional
+    public void addChildDataNode(final String dataspaceName, final String anchorName, final String parentNodeXpath,
+        final DataNode newChildDataNode) {
+        addChildDataNodes(dataspaceName, anchorName, parentNodeXpath,  Collections.singleton(newChildDataNode));
     }
 
     @Override
+    @Transactional
     public void addListElements(final String dataspaceName, final String anchorName, final String parentNodeXpath,
-        final Collection<DataNode> dataNodes) {
-        final FragmentEntity parentFragment = getFragmentByXpath(dataspaceName, anchorName, parentNodeXpath);
-        final List<FragmentEntity> newFragmentEntities =
-            dataNodes.stream().map(
-                dataNode -> toFragmentEntity(parentFragment.getDataspace(), parentFragment.getAnchor(), dataNode)
-            ).collect(Collectors.toUnmodifiableList());
-        parentFragment.getChildFragments().addAll(newFragmentEntities);
+        final Collection<DataNode> newListElements) {
+        addChildDataNodes(dataspaceName, anchorName, parentNodeXpath, newListElements);
+    }
+
+    private void addChildDataNodes(final String dataspaceName, final String anchorName, final String parentNodeXpath,
+                                final Collection<DataNode> newChildren) {
+        final FragmentEntity parentFragmentEntity = getFragmentByXpath(dataspaceName, anchorName, parentNodeXpath);
         try {
-            fragmentRepository.save(parentFragment);
-            dataNodes.forEach(
-                dataNode -> getChildFragments(dataspaceName, anchorName, dataNode)
-            );
+            for (final DataNode newChildAsDataNode : newChildren) {
+                final FragmentEntity newChildAsFragmentEntity = convertToFragmentWithAllDescendants(
+                    parentFragmentEntity.getDataspace(),
+                    parentFragmentEntity.getAnchor(),
+                    newChildAsDataNode);
+                newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
+                fragmentRepository.save(newChildAsFragmentEntity);
+            }
         } catch (final DataIntegrityViolationException exception) {
-            final List<String> conflictXpaths = dataNodes.stream()
+            final List<String> conflictXpaths = newChildren.stream()
                 .map(DataNode::getXpath)
                 .collect(Collectors.toList());
             throw AlreadyDefinedException.forDataNodes(conflictXpaths, anchorName, exception);
@@ -150,17 +147,6 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
         return parentFragment;
     }
 
-    private void getChildFragments(final String dataspaceName, final String anchorName, final DataNode dataNode) {
-        for (final DataNode childDataNode: dataNode.getChildDataNodes()) {
-            final FragmentEntity getChildsParentFragmentByXPath =
-                getFragmentByXpath(dataspaceName, anchorName, dataNode.getXpath());
-            final FragmentEntity childFragmentEntity = toFragmentEntity(getChildsParentFragmentByXPath.getDataspace(),
-                getChildsParentFragmentByXPath.getAnchor(), childDataNode);
-            getChildsParentFragmentByXPath.getChildFragments().add(childFragmentEntity);
-            fragmentRepository.save(getChildsParentFragmentByXPath);
-        }
-    }
-
     private FragmentEntity toFragmentEntity(final DataspaceEntity dataspaceEntity,
         final AnchorEntity anchorEntity, final DataNode dataNode) {
         return FragmentEntity.builder()
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 41e7a419a..2277377a5 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
@@ -155,25 +155,25 @@ class CpsDataPersistenceServiceIntegrationSpec extends CpsPersistenceSpecBase {
     }
 
     @Sql([CLEAR_DATA, SET_DATA])
-    def 'Add multiple list elements including an element with a child datanode.'() {
-        given: 'two new data nodes for an existing list'
+    def 'Add multiple new list elements including an element with a child datanode.'() {
+        given: 'two new child list elements for an existing parent'
             def listElementXpaths = ['/parent-201/child-204[@key="NEW1"]', '/parent-201/child-204[@key="NEW2"]']
             def listElements = toDataNodes(listElementXpaths)
-        and: 'a child node for one of the new data nodes'
-            def childDataNode = buildDataNode('/parent-201/child-204[@key="NEW1"]/grand-child-204[@key2="NEW1-CHILD"]', [leave:'value'], [])
-            listElements[0].childDataNodes = [childDataNode]
-        when: 'the data nodes (list elements) are added to existing parent node'
+        and: 'a (grand)child data node for one of the new list elements'
+            def grandChild = buildDataNode('/parent-201/child-204[@key="NEW1"]/grand-child-204[@key2="NEW1-CHILD"]', [leave:'value'], [])
+            listElements[0].childDataNodes = [grandChild]
+        when: 'the new data node (list elements) are added to an existing parent node'
             objectUnderTest.addListElements(DATASPACE_NAME, ANCHOR_NAME3, '/parent-201', listElements)
-        then: 'new entries successfully persisted, parent node now contains 5 children (2 new + 3 existing before)'
+        then: 'new entries are successfully persisted, parent node now contains 5 children (2 new + 3 existing before)'
             def parentFragment = fragmentRepository.getById(LIST_DATA_NODE_PARENT201_FRAGMENT_ID)
             def allChildXpaths = parentFragment.childFragments.collect { it.xpath }
             assert allChildXpaths.size() == 5
             assert allChildXpaths.containsAll(listElementXpaths)
-        and: 'the child node of the new list entry is also present'
+        and: 'the (grand)child node of the new list entry is also present'
             def dataspaceEntity = dataspaceRepository.getByName(DATASPACE_NAME)
             def anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, ANCHOR_NAME3)
-            def listElementChild = fragmentRepository.findByDataspaceAndAnchorAndXpath(dataspaceEntity, anchorEntity, childDataNode.xpath)
-            assert listElementChild.isPresent()
+            def grandChildFragmentEntity = fragmentRepository.findByDataspaceAndAnchorAndXpath(dataspaceEntity, anchorEntity, grandChild.xpath)
+            assert grandChildFragmentEntity.isPresent()
     }
 
     @Sql([CLEAR_DATA, SET_DATA])