Performance Improvement: Fix Insert Yang Resource IDs (Schemset)

- Add robustness to handle insertion/get of empty collection
- Fix business logic to pass down ALL module references during module Sync
- Update Java doc etc to clarify ALL module references are needed (not just new)

Issue-ID: CPS-1246
Issue-ID: CPS-1126
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Change-Id: Ic8ff4bdfef646e98ef61a6732c6d5ecb4b762e29

2 files changed, 13 insertions, 20 deletions

diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/sync/ModuleSyncService.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/sync/ModuleSyncService.java
index 7f61c476d5..7efce1ad52 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/sync/ModuleSyncService.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/inventory/sync/ModuleSyncService.java
@@ -23,9 +23,8 @@ package org.onap.cps.ncmp.api.inventory.sync;
 import static org.onap.cps.ncmp.api.impl.constants.DmiRegistryConstants.NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME;
 
 import java.util.Collection;
-import java.util.HashMap;
+import java.util.Collections;
 import java.util.Map;
-import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.onap.cps.api.CpsAdminService;
@@ -54,33 +53,28 @@ public class ModuleSyncService {
      */
     public void syncAndCreateSchemaSetAndAnchor(final YangModelCmHandle yangModelCmHandle) {
 
-        final Collection<ModuleReference> moduleReferencesFromCmHandle =
+        final Collection<ModuleReference> allModuleReferencesFromCmHandle =
                 dmiModelOperations.getModuleReferences(yangModelCmHandle);
 
         final Collection<ModuleReference> identifiedNewModuleReferencesFromCmHandle = cpsModuleService
-                .identifyNewModuleReferences(moduleReferencesFromCmHandle);
-
-        final Collection<ModuleReference> existingModuleReferencesFromCmHandle =
-                moduleReferencesFromCmHandle.stream().filter(moduleReferenceFromCmHandle ->
-                        !identifiedNewModuleReferencesFromCmHandle.contains(moduleReferenceFromCmHandle)
-                ).collect(Collectors.toList());
+                .identifyNewModuleReferences(allModuleReferencesFromCmHandle);
 
         final Map<String, String> newModuleNameToContentMap;
         if (identifiedNewModuleReferencesFromCmHandle.isEmpty()) {
-            newModuleNameToContentMap = new HashMap<>();
+            newModuleNameToContentMap = Collections.emptyMap();
         } else {
             newModuleNameToContentMap = dmiModelOperations.getNewYangResourcesFromDmi(yangModelCmHandle,
                     identifiedNewModuleReferencesFromCmHandle);
         }
-        createSchemaSetAndAnchor(yangModelCmHandle, newModuleNameToContentMap, existingModuleReferencesFromCmHandle);
+        createSchemaSetAndAnchor(yangModelCmHandle, newModuleNameToContentMap, allModuleReferencesFromCmHandle);
     }
 
     private void createSchemaSetAndAnchor(final YangModelCmHandle yangModelCmHandle,
                                           final Map<String, String> newModuleNameToContentMap,
-                                          final Collection<ModuleReference> existingModuleReferencesFromCmHandle) {
+                                          final Collection<ModuleReference> allModuleReferencesFromCmHandle) {
         final String schemaSetAndAnchorName = yangModelCmHandle.getId();
         cpsModuleService.createSchemaSetFromModules(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, schemaSetAndAnchorName,
-                        newModuleNameToContentMap, existingModuleReferencesFromCmHandle);
+                        newModuleNameToContentMap, allModuleReferencesFromCmHandle);
         cpsAdminService.createAnchor(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, schemaSetAndAnchorName,
             schemaSetAndAnchorName);
     }
diff --git a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/inventory/sync/ModuleSyncServiceSpec.groovy b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/inventory/sync/ModuleSyncServiceSpec.groovy
index 78da7eb747..3c4c6f554f 100644
--- a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/inventory/sync/ModuleSyncServiceSpec.groovy
+++ b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/inventory/sync/ModuleSyncServiceSpec.groovy
@@ -47,8 +47,7 @@ class ModuleSyncServiceSpec extends Specification {
             ncmpServiceCmHandle.cmHandleId = 'cmHandleId-1'
             def yangModelCmHandle = YangModelCmHandle.toYangModelCmHandle(dmiServiceName, '', '', ncmpServiceCmHandle)
         and: 'DMI operations returns some module references'
-            def moduleReferences =  [ new ModuleReference(moduleName:'module1',revision:'1'),
-                                                            new ModuleReference(moduleName:'module2',revision:'2') ]
+            def moduleReferences =  [ new ModuleReference('module1','1'), new ModuleReference('module2','2') ]
             mockDmiModelOperations.getModuleReferences(yangModelCmHandle) >> moduleReferences
         and: 'CPS-Core returns list of existing module resources'
             mockCpsModuleService.getYangResourceModuleReferences(expectedDataspaceName) >> toModuleReference(existingModuleResourcesInCps)
@@ -58,14 +57,14 @@ class ModuleSyncServiceSpec extends Specification {
             mockCpsModuleService.identifyNewModuleReferences(moduleReferences) >> toModuleReference(identifiedNewModuleReferences)
             objectUnderTest.syncAndCreateSchemaSetAndAnchor(yangModelCmHandle)
         then: 'create schema set from module is invoked with correct parameters'
-            1 * mockCpsModuleService.createSchemaSetFromModules('NFP-Operational', 'cmHandleId-1', newModuleNameContentToMap, existingModuleReferencesInCps)
+            1 * mockCpsModuleService.createSchemaSetFromModules('NFP-Operational', 'cmHandleId-1', newModuleNameContentToMap, moduleReferences)
         and: 'anchor is created with the correct parameters'
             1 * mockCpsAdminService.createAnchor('NFP-Operational', 'cmHandleId-1', 'cmHandleId-1')
         where: 'the following parameters are used'
-            scenario             | existingModuleResourcesInCps           | identifiedNewModuleReferences | newModuleNameContentToMap       | existingModuleReferencesInCps
-            'one new module'     | [['module2' : '2'], ['module3' : '3']] | [['module1' : '1']]           | [module1: 'some yang source']   | [new ModuleReference(moduleName:'module2',revision:'2')]
-            'no add. properties' | [['module2' : '2'], ['module3' : '3']] | [['module1' : '1']]           | [module1: 'some yang source']   | [new ModuleReference(moduleName:'module2',revision:'2')]
-            'no new module'      | [['module1' : '1'], ['module2' : '2']] | []                            | [:]                             | [new ModuleReference(moduleName:'module1',revision:'1'), new ModuleReference(moduleName:'module2',revision:'2')]
+            scenario             | existingModuleResourcesInCps           | identifiedNewModuleReferences | newModuleNameContentToMap
+            'one new module'     | [['module2' : '2'], ['module3' : '3']] | [['module1' : '1']]           | [module1: 'some yang source']
+            'no add. properties' | [['module2' : '2'], ['module3' : '3']] | [['module1' : '1']]           | [module1: 'some yang source']
+            'no new module'      | [['module1' : '1'], ['module2' : '2']] | []                            | [:]
     }
 
     def 'Delete Schema Set for CmHandle' () {