Improve batch delete schemasets performance

- Bulk delete anchors and datanodes associated with schemasets.
  Improves de-registration performance by approx 10%

Issue-ID: CPS-1423
Signed-off-by: danielhanrahan <daniel.hanrahan@est.tech>
Change-Id: Ie38e8b4c64356bf5935d8c7a5d3f5bfa73fb1714

17 files changed, 221 insertions, 29 deletions

diff --git a/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsAdminPersistenceServiceImpl.java b/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsAdminPersistenceServiceImpl.java
index 2cebfc72c0..162b268d87 100755
--- a/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsAdminPersistenceServiceImpl.java
+++ b/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsAdminPersistenceServiceImpl.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * Copyright (C) 2020-2022 Nordix Foundation.
+ * Copyright (C) 2020-2023 Nordix Foundation.
  * Modifications Copyright (C) 2020-2022 Bell Canada.
  * Modifications Copyright (C) 2021 Pantheon.tech
  * Modifications Copyright (C) 2022 TechMahindra Ltd.
@@ -131,6 +131,13 @@ public class CpsAdminPersistenceServiceImpl implements CpsAdminPersistenceServic
     }
 
     @Override
+    public Collection<Anchor> getAnchors(final String dataspaceName, final Collection<String> schemaSetNames) {
+        final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
+        return anchorRepository.findAllByDataspaceAndSchemaSetNameIn(dataspaceEntity, schemaSetNames)
+            .stream().map(CpsAdminPersistenceServiceImpl::toAnchor).collect(Collectors.toSet());
+    }
+
+    @Override
     public Collection<Anchor> queryAnchors(final String dataspaceName, final Collection<String> inputModuleNames) {
         try {
             validateDataspaceAndModuleNames(dataspaceName, inputModuleNames);
@@ -157,6 +164,13 @@ public class CpsAdminPersistenceServiceImpl implements CpsAdminPersistenceServic
         anchorRepository.delete(anchorEntity);
     }
 
+    @Transactional
+    @Override
+    public void deleteAnchors(final String dataspaceName, final Collection<String> anchorNames) {
+        final var dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
+        anchorRepository.deleteAllByDataspaceAndNameIn(dataspaceEntity, anchorNames);
+    }
+
     private AnchorEntity getAnchorEntity(final String dataspaceName, final String anchorName) {
         final var dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
         return anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
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 5b310efd5d..a8e0025088 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
@@ -607,6 +607,15 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
 
     @Override
     @Transactional
+    public void deleteDataNodes(final String dataspaceName, final Collection<String> anchorNames) {
+        final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
+        final Collection<AnchorEntity> anchorEntities =
+            anchorRepository.findAllByDataspaceAndNameIn(dataspaceEntity, anchorNames);
+        fragmentRepository.deleteByAnchorIn(anchorEntities);
+    }
+
+    @Override
+    @Transactional
     public void deleteDataNodes(final String dataspaceName, final String anchorName,
                                 final Collection<String> xpathsToDelete) {
         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
diff --git a/cps-ri/src/main/java/org/onap/cps/spi/repository/AnchorRepository.java b/cps-ri/src/main/java/org/onap/cps/spi/repository/AnchorRepository.java
index 3dbd578c73..46b0fec1c2 100755
--- a/cps-ri/src/main/java/org/onap/cps/spi/repository/AnchorRepository.java
+++ b/cps-ri/src/main/java/org/onap/cps/spi/repository/AnchorRepository.java
@@ -47,6 +47,12 @@ public interface AnchorRepository extends JpaRepository<AnchorEntity, Integer> {
 
     Collection<AnchorEntity> findAllBySchemaSet(@NotNull SchemaSetEntity schemaSetEntity);
 
+    Collection<AnchorEntity> findAllByDataspaceAndNameIn(@NotNull DataspaceEntity dataspaceEntity,
+                                                         @NotNull Collection<String> anchorNames);
+
+    Collection<AnchorEntity> findAllByDataspaceAndSchemaSetNameIn(@NotNull DataspaceEntity dataspaceEntity,
+                                                                  @NotNull Collection<String> schemaSetNames);
+
     Integer countByDataspace(@NotNull DataspaceEntity dataspaceEntity);
 
     @Query(value = "SELECT anchor.* FROM yang_resource\n"
@@ -58,4 +64,7 @@ public interface AnchorRepository extends JpaRepository<AnchorEntity, Integer> {
         + "HAVING COUNT(DISTINCT module_name) = :sizeOfModuleNames", nativeQuery = true)
     Collection<AnchorEntity> getAnchorsByDataspaceIdAndModuleNames(@Param("dataspaceId") int dataspaceId,
         @Param("moduleNames") Collection<String> moduleNames, @Param("sizeOfModuleNames") int sizeOfModuleNames);
-}
\ No newline at end of file
+
+    void deleteAllByDataspaceAndNameIn(@NotNull DataspaceEntity dataspaceEntity,
+                                       @NotNull Collection<String> anchorNames);
+}
diff --git a/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsAdminPersistenceServiceSpec.groovy b/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsAdminPersistenceServiceSpec.groovy
index 99d44aac89..28d3bcfa4c 100644
--- a/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsAdminPersistenceServiceSpec.groovy
+++ b/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsAdminPersistenceServiceSpec.groovy
@@ -1,6 +1,6 @@
 /*
  *  ============LICENSE_START=======================================================
- *  Copyright (C) 2021-2022 Nordix Foundation
+ *  Copyright (C) 2021-2023 Nordix Foundation
  *  Modifications Copyright (C) 2021 Pantheon.tech
  *  Modifications Copyright (C) 2022 Bell Canada
  *  Modifications Copyright (C) 2022 TechMahindra Ltd.
@@ -142,7 +142,8 @@ class CpsAdminPersistenceServiceSpec extends CpsPersistenceSpecBase {
         where: 'the following data is used'
             dataspaceName          || expectedAnchors
             DATASPACE_NAME         || [Anchor.builder().name(ANCHOR_NAME1).schemaSetName(SCHEMA_SET_NAME1).dataspaceName(DATASPACE_NAME).build(),
-                                       Anchor.builder().name(ANCHOR_NAME2).schemaSetName(SCHEMA_SET_NAME2).dataspaceName(DATASPACE_NAME).build()]
+                                       Anchor.builder().name(ANCHOR_NAME2).schemaSetName(SCHEMA_SET_NAME2).dataspaceName(DATASPACE_NAME).build(),
+                                       Anchor.builder().name(ANCHOR_NAME3).schemaSetName(SCHEMA_SET_NAME2).dataspaceName(DATASPACE_NAME).build()]
             DATASPACE_WITH_NO_DATA || []
     }
 
@@ -179,6 +180,17 @@ class CpsAdminPersistenceServiceSpec extends CpsPersistenceSpecBase {
     }
 
     @Sql([CLEAR_DATA, SET_DATA])
+    def 'Get all anchors associated with multiple schemasets in a dataspace.'() {
+        when: 'anchors are retrieved by dataspace and schema-sets'
+            def anchors = objectUnderTest.getAnchors('DATASPACE-001', ['SCHEMA-SET-001', 'SCHEMA-SET-002'])
+        then: ' the response contains expected anchors'
+            anchors == Set.of(
+                new Anchor('ANCHOR-001', 'DATASPACE-001', 'SCHEMA-SET-001'),
+                new Anchor('ANCHOR-002', 'DATASPACE-001', 'SCHEMA-SET-002'),
+                new Anchor('ANCHOR-003', 'DATASPACE-001', 'SCHEMA-SET-002'))
+    }
+
+    @Sql([CLEAR_DATA, SET_DATA])
     def 'Delete anchor'() {
         when: 'delete anchor action is invoked'
             objectUnderTest.deleteAnchor(DATASPACE_NAME, ANCHOR_NAME2)
@@ -198,6 +210,15 @@ class CpsAdminPersistenceServiceSpec extends CpsPersistenceSpecBase {
             'anchor does not exists'   | DATASPACE_NAME | 'unknown'      || AnchorNotFoundException
     }
 
+    @Sql([CLEAR_DATA, SET_DATA])
+    def 'Delete multiple anchors'() {
+        when: 'delete anchors action is invoked'
+            objectUnderTest.deleteAnchors(DATASPACE_NAME, ['ANCHOR-002', 'ANCHOR-003'])
+        then: 'anchors are deleted'
+            anchorRepository.findById(3002).isEmpty()
+            anchorRepository.findById(3003).isEmpty()
+    }
+
     @Sql([CLEAR_DATA, SAMPLE_DATA_FOR_ANCHORS_WITH_MODULES])
     def 'Query anchors that have #scenario.'() {
         when: 'all anchor are retrieved for the given dataspace name and module names'
@@ -236,7 +257,7 @@ class CpsAdminPersistenceServiceSpec extends CpsPersistenceSpecBase {
         where: 'the following data is used'
             scenario                        | dataspaceName   || expectedException          | expectedMessageDetails
             'dataspace name does not exist' | 'unknown'       || DataspaceNotFoundException | 'unknown does not exist'
-            'dataspace contains an anchor'  | 'DATASPACE-001' || DataspaceInUseException    | 'contains 2 anchor(s)'
+            'dataspace contains an anchor'  | 'DATASPACE-001' || DataspaceInUseException    | 'contains 3 anchor(s)'
             'dataspace contains schemasets' | 'DATASPACE-003' || DataspaceInUseException    | 'contains 1 schemaset(s)'
     }
 }
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 e4c552978d..91024082af 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
@@ -54,8 +54,6 @@ class CpsDataPersistenceServiceIntegrationSpec extends CpsPersistenceSpecBase {
     static DataNodeBuilder dataNodeBuilder = new DataNodeBuilder()
 
     static final String SET_DATA = '/data/fragment.sql'
-    static int DATASPACE_1001_ID = 1001L
-    static int ANCHOR_3003_ID = 3003L
     static long ID_DATA_NODE_WITH_DESCENDANTS = 4001
     static String XPATH_DATA_NODE_WITH_DESCENDANTS = '/parent-1'
     static String XPATH_DATA_NODE_WITH_LEAVES = '/parent-207'
@@ -667,11 +665,23 @@ class CpsDataPersistenceServiceIntegrationSpec extends CpsPersistenceSpecBase {
     @Sql([CLEAR_DATA, SET_DATA])
     def 'Delete data node for an anchor.'() {
         given: 'a data-node exists for an anchor'
-            assert fragmentsExistInDB(DATASPACE_1001_ID, ANCHOR_3003_ID)
+            assert fragmentsExistInDB(1001, 3003)
         when: 'data nodes are deleted '
             objectUnderTest.deleteDataNodes(DATASPACE_NAME, ANCHOR_NAME3)
         then: 'all data-nodes are deleted successfully'
-            assert !fragmentsExistInDB(DATASPACE_1001_ID, ANCHOR_3003_ID)
+            assert !fragmentsExistInDB(1001, 3003)
+    }
+
+    @Sql([CLEAR_DATA, SET_DATA])
+    def 'Delete data node for multiple anchors.'() {
+        given: 'a data-node exists for an anchor'
+            assert fragmentsExistInDB(1001, 3001)
+            assert fragmentsExistInDB(1001, 3003)
+        when: 'data nodes are deleted '
+            objectUnderTest.deleteDataNodes(DATASPACE_NAME, ['ANCHOR-001', 'ANCHOR-003'])
+        then: 'all data-nodes are deleted successfully'
+            assert !fragmentsExistInDB(1001, 3001)
+            assert !fragmentsExistInDB(1001, 3003)
     }
 
     def fragmentsExistInDB(dataSpaceId, anchorId) {
diff --git a/cps-ri/src/test/groovy/org/onap/cps/spi/performance/CpsDataPersistenceServiceDeletePerfTest.groovy b/cps-ri/src/test/groovy/org/onap/cps/spi/performance/CpsDataPersistenceServiceDeletePerfTest.groovy
index 3b9338ce41..706b35ebb7 100644
--- a/cps-ri/src/test/groovy/org/onap/cps/spi/performance/CpsDataPersistenceServiceDeletePerfTest.groovy
+++ b/cps-ri/src/test/groovy/org/onap/cps/spi/performance/CpsDataPersistenceServiceDeletePerfTest.groovy
@@ -212,7 +212,7 @@ class CpsDataPersistenceServiceDeletePerfTest extends CpsPersistencePerfSpecBase
     }
 
     @Sql([CLEAR_DATA, PERF_TEST_DATA])
-    def 'Delete data nodes for an anchor'() {212
+    def 'Delete data nodes for an anchor'() {
         given: 'a node with a large number of descendants is created'
             createLineage(objectUnderTest, 50, 50, false)
             createLineage(objectUnderTest, 50, 50, true)
@@ -225,4 +225,18 @@ class CpsDataPersistenceServiceDeletePerfTest extends CpsPersistencePerfSpecBase
             recordAndAssertPerformance('Delete data nodes for anchor', 300, deleteDurationInMillis)
     }
 
+    @Sql([CLEAR_DATA, PERF_TEST_DATA])
+    def 'Delete data nodes for multiple anchors'() {
+        given: 'a node with a large number of descendants is created'
+            createLineage(objectUnderTest, 50, 50, false)
+            createLineage(objectUnderTest, 50, 50, true)
+        when: 'data nodes are deleted'
+            stopWatch.start()
+            objectUnderTest.deleteDataNodes(PERF_DATASPACE, [PERF_ANCHOR])
+            stopWatch.stop()
+            def deleteDurationInMillis = stopWatch.getTotalTimeMillis()
+        then: 'delete duration is under 300 milliseconds'
+            recordAndAssertPerformance('Delete data nodes for anchor', 300, deleteDurationInMillis)
+    }
+
 }
diff --git a/cps-ri/src/test/resources/data/anchor.sql b/cps-ri/src/test/resources/data/anchor.sql
index 40fc44c0ae..2ab7966e18 100644
--- a/cps-ri/src/test/resources/data/anchor.sql
+++ b/cps-ri/src/test/resources/data/anchor.sql
@@ -1,7 +1,7 @@
 /*
    ============LICENSE_START=======================================================
     Copyright (C) 2020 Pantheon.tech
-    Modifications Copyright (C) 2020 Nordix Foundation.
+    Modifications Copyright (C) 2020-2023 Nordix Foundation.
     Modifications Copyright (C) 2021-2022 Bell Canada.
    ================================================================================
    Licensed under the Apache License, Version 2.0 (the "License");
@@ -32,7 +32,8 @@ INSERT INTO SCHEMA_SET (ID, NAME, DATASPACE_ID) VALUES
 
 INSERT INTO ANCHOR (ID, NAME, DATASPACE_ID, SCHEMA_SET_ID) VALUES
     (3001, 'ANCHOR-001', 1001, 2001),
-    (3002, 'ANCHOR-002', 1001, 2002);
+    (3002, 'ANCHOR-002', 1001, 2002),
+    (3003, 'ANCHOR-003', 1001, 2002);
 
 INSERT INTO FRAGMENT (ID, DATASPACE_ID, ANCHOR_ID, PARENT_ID, XPATH, ATTRIBUTES) VALUES
     (4001, 1001, 3001, null, '/xpath', '{}');
diff --git a/cps-service/src/main/java/org/onap/cps/api/CpsAdminService.java b/cps-service/src/main/java/org/onap/cps/api/CpsAdminService.java
index b0e68cf8fb..fcf3f54cce 100755
--- a/cps-service/src/main/java/org/onap/cps/api/CpsAdminService.java
+++ b/cps-service/src/main/java/org/onap/cps/api/CpsAdminService.java
@@ -1,6 +1,6 @@
 /*
  *  ============LICENSE_START=======================================================
- *  Copyright (C) 2020-2022 Nordix Foundation
+ *  Copyright (C) 2020-2023 Nordix Foundation
  *  Modifications Copyright (C) 2020-2022 Bell Canada.
  *  Modifications Copyright (C) 2021 Pantheon.tech
  *  Modifications Copyright (C) 2022 TechMahindra Ltd.
@@ -84,7 +84,7 @@ public interface CpsAdminService {
     Collection<Anchor> getAnchors(String dataspaceName);
 
     /**
-     * Read all anchors associated the given schema-set in the given dataspace.
+     * Read all anchors associated with the given schema-set in the given dataspace.
      *
      * @param dataspaceName dataspace name
      * @param schemaSetName schema-set name
@@ -93,6 +93,15 @@ public interface CpsAdminService {
     Collection<Anchor> getAnchors(String dataspaceName, String schemaSetName);
 
     /**
+     * Read all anchors associated with the given schema-sets in the given dataspace.
+     *
+     * @param dataspaceName  dataspace name
+     * @param schemaSetNames schema-set names
+     * @return a collection of anchors
+     */
+    Collection<Anchor> getAnchors(String dataspaceName, Collection<String> schemaSetNames);
+
+    /**
      * Get an anchor in the given dataspace using the anchor name.
      *
      * @param dataspaceName dataspace name
@@ -110,6 +119,14 @@ public interface CpsAdminService {
     void deleteAnchor(String dataspaceName, String anchorName);
 
     /**
+     * Delete anchors by name in given dataspace.
+     *
+     * @param dataspaceName dataspace name
+     * @param anchorNames   anchor names
+     */
+    void deleteAnchors(String dataspaceName, Collection<String> anchorNames);
+
+    /**
      * Query anchor names for the given module names in the provided dataspace.
      *
      * @param dataspaceName dataspace name
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 174d71f64d..07da5773d8 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
@@ -228,6 +228,15 @@ public interface CpsDataService {
     void deleteDataNodes(String dataspaceName, String anchorName, OffsetDateTime observedTimestamp);
 
     /**
+     * Deletes all data nodes for multiple anchors in a dataspace.
+     *
+     * @param dataspaceName     dataspace name
+     * @param anchorNames       anchor names
+     * @param observedTimestamp observed timestamp
+     */
+    void deleteDataNodes(String dataspaceName, Collection<String> anchorNames, OffsetDateTime observedTimestamp);
+
+    /**
      * Deletes a list or a list-element under given anchor and dataspace.
      *
      * @param dataspaceName dataspace name
diff --git a/cps-service/src/main/java/org/onap/cps/api/impl/CpsAdminServiceImpl.java b/cps-service/src/main/java/org/onap/cps/api/impl/CpsAdminServiceImpl.java
index ece3eb95c9..e286eea173 100755
--- a/cps-service/src/main/java/org/onap/cps/api/impl/CpsAdminServiceImpl.java
+++ b/cps-service/src/main/java/org/onap/cps/api/impl/CpsAdminServiceImpl.java
@@ -1,6 +1,6 @@
 /*
  *  ============LICENSE_START=======================================================
- *  Copyright (C) 2020-2022 Nordix Foundation
+ *  Copyright (C) 2020-2023 Nordix Foundation
  *  Modifications Copyright (C) 2020-2022 Bell Canada.
  *  Modifications Copyright (C) 2021 Pantheon.tech
  *  Modifications Copyright (C) 2022 TechMahindra Ltd.
@@ -87,6 +87,13 @@ public class CpsAdminServiceImpl implements CpsAdminService {
     }
 
     @Override
+    public Collection<Anchor> getAnchors(final String dataspaceName, final Collection<String> schemaSetNames) {
+        cpsValidator.validateNameCharacters(dataspaceName);
+        cpsValidator.validateNameCharacters(schemaSetNames);
+        return cpsAdminPersistenceService.getAnchors(dataspaceName, schemaSetNames);
+    }
+
+    @Override
     public Anchor getAnchor(final String dataspaceName, final String anchorName) {
         cpsValidator.validateNameCharacters(dataspaceName, anchorName);
         return cpsAdminPersistenceService.getAnchor(dataspaceName, anchorName);
@@ -100,6 +107,14 @@ public class CpsAdminServiceImpl implements CpsAdminService {
     }
 
     @Override
+    public void deleteAnchors(final String dataspaceName, final Collection<String> anchorNames) {
+        cpsValidator.validateNameCharacters(dataspaceName);
+        cpsValidator.validateNameCharacters(anchorNames);
+        cpsDataService.deleteDataNodes(dataspaceName, anchorNames, OffsetDateTime.now());
+        cpsAdminPersistenceService.deleteAnchors(dataspaceName, anchorNames);
+    }
+
+    @Override
     public Collection<String> queryAnchorNames(final String dataspaceName, final Collection<String> moduleNames) {
         cpsValidator.validateNameCharacters(dataspaceName);
         final Collection<Anchor> anchors = cpsAdminPersistenceService.queryAnchors(dataspaceName, moduleNames);
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 06a0845385..59de411397 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
@@ -272,8 +272,8 @@ public class CpsDataServiceImpl implements CpsDataService {
     }
 
     @Override
-    @Timed(value = "cps.data.service.datanode.all.delete",
-        description = "Time taken to delete all datanodes")
+    @Timed(value = "cps.data.service.datanode.delete.anchor",
+        description = "Time taken to delete all datanodes for an anchor")
     public void deleteDataNodes(final String dataspaceName, final String anchorName,
                                 final OffsetDateTime observedTimestamp) {
         cpsValidator.validateNameCharacters(dataspaceName, anchorName);
@@ -282,6 +282,19 @@ public class CpsDataServiceImpl implements CpsDataService {
     }
 
     @Override
+    @Timed(value = "cps.data.service.datanode.delete.anchor.batch",
+        description = "Time taken to delete all datanodes for multiple anchors")
+    public void deleteDataNodes(final String dataspaceName, final Collection<String> anchorNames,
+                                final OffsetDateTime observedTimestamp) {
+        cpsValidator.validateNameCharacters(dataspaceName);
+        cpsValidator.validateNameCharacters(anchorNames);
+        for (final String anchorName : anchorNames) {
+            processDataUpdatedEventAsync(dataspaceName, anchorName, ROOT_NODE_XPATH, DELETE, observedTimestamp);
+        }
+        cpsDataPersistenceService.deleteDataNodes(dataspaceName, anchorNames);
+    }
+
+    @Override
     @Timed(value = "cps.data.service.list.delete",
         description = "Time taken to delete a list or list element")
     public void deleteListOrListElement(final String dataspaceName, final String anchorName, final String listNodeXpath,
diff --git a/cps-service/src/main/java/org/onap/cps/api/impl/CpsModuleServiceImpl.java b/cps-service/src/main/java/org/onap/cps/api/impl/CpsModuleServiceImpl.java
index e71e6ce662..d6c01f7a9b 100644
--- a/cps-service/src/main/java/org/onap/cps/api/impl/CpsModuleServiceImpl.java
+++ b/cps-service/src/main/java/org/onap/cps/api/impl/CpsModuleServiceImpl.java
@@ -26,6 +26,7 @@ package org.onap.cps.api.impl;
 import io.micrometer.core.annotation.Timed;
 import java.util.Collection;
 import java.util.Map;
+import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import org.onap.cps.api.CpsAdminService;
 import org.onap.cps.api.CpsModuleService;
@@ -114,12 +115,9 @@ public class CpsModuleServiceImpl implements CpsModuleService {
     public void deleteSchemaSetsWithCascade(final String dataspaceName, final Collection<String> schemaSetNames) {
         cpsValidator.validateNameCharacters(dataspaceName);
         cpsValidator.validateNameCharacters(schemaSetNames);
-        for (final String schemaSetName : schemaSetNames) {
-            final Collection<Anchor> anchors = cpsAdminService.getAnchors(dataspaceName, schemaSetName);
-            for (final Anchor anchor : anchors) {
-                cpsAdminService.deleteAnchor(dataspaceName, anchor.getName());
-            }
-        }
+        final Collection<String> anchorNames = cpsAdminService.getAnchors(dataspaceName, schemaSetNames)
+            .stream().map(Anchor::getName).collect(Collectors.toSet());
+        cpsAdminService.deleteAnchors(dataspaceName, anchorNames);
         cpsModulePersistenceService.deleteUnusedYangResourceModules();
         cpsModulePersistenceService.deleteSchemaSets(dataspaceName, schemaSetNames);
         for (final String schemaSetName : schemaSetNames) {
diff --git a/cps-service/src/main/java/org/onap/cps/spi/CpsAdminPersistenceService.java b/cps-service/src/main/java/org/onap/cps/spi/CpsAdminPersistenceService.java
index 6bcb69844d..1c1e80a20f 100755
--- a/cps-service/src/main/java/org/onap/cps/spi/CpsAdminPersistenceService.java
+++ b/cps-service/src/main/java/org/onap/cps/spi/CpsAdminPersistenceService.java
@@ -73,7 +73,7 @@ public interface CpsAdminPersistenceService {
     void createAnchor(String dataspaceName, String schemaSetName, String anchorName);
 
     /**
-     * Read all anchors associated the given schema-set in the given dataspace.
+     * Read all anchors associated with the given schema-set in the given dataspace.
      *
      * @param dataspaceName dataspace name
      * @param schemaSetName schema-set name
@@ -82,6 +82,15 @@ public interface CpsAdminPersistenceService {
     Collection<Anchor> getAnchors(String dataspaceName, String schemaSetName);
 
     /**
+     * Read all anchors associated with multiple schema-sets in the given dataspace.
+     *
+     * @param dataspaceName  dataspace name
+     * @param schemaSetNames schema-set names
+     * @return a collection of anchors
+     */
+    Collection<Anchor> getAnchors(String dataspaceName, Collection<String> schemaSetNames);
+
+    /**
      * Read all anchors in the given a dataspace.
      *
      * @param dataspaceName dataspace name
@@ -116,4 +125,12 @@ public interface CpsAdminPersistenceService {
      * @param anchorName anchor name
      */
     void deleteAnchor(String dataspaceName, String anchorName);
+
+    /**
+     * Delete anchors by name in given dataspace.
+     *
+     * @param dataspaceName dataspace name
+     * @param anchorNames   anchor names
+     */
+    void deleteAnchors(String dataspaceName, Collection<String> anchorNames);
 }
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 3e0b4475e8..fe9cf2f698 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
@@ -191,6 +191,14 @@ public interface CpsDataPersistenceService {
     void deleteDataNodes(String dataspaceName, String anchorName);
 
     /**
+     * Deletes all dataNodes in multiple anchors.
+     *
+     * @param dataspaceName   dataspace name
+     * @param anchorNames     anchor names
+     */
+    void deleteDataNodes(String dataspaceName, Collection<String> anchorNames);
+
+    /**
      * Deletes a single existing list element or the whole list.
      *
      * @param dataspaceName   dataspace name
diff --git a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsAdminServiceImplSpec.groovy b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsAdminServiceImplSpec.groovy
index e7d4e4ddb1..4e0349d2b8 100755
--- a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsAdminServiceImplSpec.groovy
+++ b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsAdminServiceImplSpec.groovy
@@ -1,6 +1,6 @@
 /*
  *  ============LICENSE_START=======================================================
- *  Copyright (C) 2020-2022 Nordix Foundation
+ *  Copyright (C) 2020-2023 Nordix Foundation
  *  Modifications Copyright (C) 2020-2022 Bell Canada.
  *  Modifications Copyright (C) 2021 Pantheon.tech
  *  Modifications Copyright (C) 2022 TechMahindra Ltd.
@@ -79,6 +79,19 @@ class CpsAdminServiceImplSpec extends Specification {
             1 * mockCpsValidator.validateNameCharacters('someDataspace', 'someSchemaSet')
     }
 
+    def 'Retrieve all anchors for multiple schema-sets.'() {
+        given: 'that anchor is associated with the dataspace and schemasets'
+            def anchors = [new Anchor(), new Anchor()]
+            mockCpsAdminPersistenceService.getAnchors('someDataspace', _ as Collection<String>) >> anchors
+        when: 'get anchors is called for a dataspace name and schema set names'
+            def result = objectUnderTest.getAnchors('someDataspace', ['schemaSet1', 'schemaSet2'])
+        then: 'the collection provided by persistence service is returned as result'
+            result == anchors
+        and: 'the CpsValidator is called on the dataspace name and schema-set names'
+            1 * mockCpsValidator.validateNameCharacters('someDataspace')
+            1 * mockCpsValidator.validateNameCharacters(_)
+    }
+
     def 'Retrieve anchor for dataspace and provided anchor name.'() {
         given: 'that anchor name is associated with the dataspace'
             Anchor anchor = new Anchor()
@@ -118,6 +131,18 @@ class CpsAdminServiceImplSpec extends Specification {
             1 * mockCpsValidator.validateNameCharacters('someDataspace', 'someAnchor')
     }
 
+    def 'Delete multiple anchors.'() {
+        when: 'delete anchors is invoked'
+            objectUnderTest.deleteAnchors('someDataspace', ['anchor1', 'anchor2'])
+        then: 'delete data nodes is invoked on the data service with expected parameters'
+            1 * mockCpsDataService.deleteDataNodes('someDataspace', _ as Collection<String>, _ as OffsetDateTime)
+        and: 'the persistence service method is invoked with same parameters to delete anchor'
+            1 * mockCpsAdminPersistenceService.deleteAnchors('someDataspace',_ as Collection<String>)
+        and: 'the CpsValidator is called on the dataspace name and anchor names'
+            1 * mockCpsValidator.validateNameCharacters('someDataspace')
+            1 * mockCpsValidator.validateNameCharacters(_)
+    }
+
     def 'Query all anchor identifiers for a dataspace and module names.'() {
         given: 'the persistence service is invoked with the expected parameters and returns a list of anchors'
             mockCpsAdminPersistenceService.queryAnchors('some-dataspace-name', ['some-module-name']) >> [new Anchor(name:'some-anchor-identifier')]
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 8bbf4e5715..69b0c94f45 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
@@ -364,6 +364,19 @@ class CpsDataServiceImplSpec extends Specification {
             1 * mockCpsDataPersistenceService.deleteDataNodes(dataspaceName, anchorName)
     }
 
+    def 'Delete all data nodes for given dataspace and multiple anchors.'() {
+        given: 'schema set for given anchors and dataspace references test tree model'
+            setupSchemaSetMocks('test-tree.yang')
+        when: 'delete data node method is invoked with correct parameters'
+            objectUnderTest.deleteDataNodes(dataspaceName, ['anchor1', 'anchor2'], observedTimestamp)
+        then: 'data updated events are sent to notification service before the delete'
+            2 * mockNotificationService.processDataUpdatedEvent(dataspaceName, _, '/', Operation.DELETE, observedTimestamp)
+        and: 'the CpsValidator is called on the dataspace name and the anchor names'
+            2 * mockCpsValidator.validateNameCharacters(_)
+        and: 'the persistence service method is invoked with the correct parameters'
+            1 * mockCpsDataPersistenceService.deleteDataNodes(dataspaceName, _ as Collection<String>)
+    }
+
     def setupSchemaSetMocks(String... yangResources) {
         def mockYangTextSchemaSourceSet = Mock(YangTextSchemaSourceSet)
         mockYangTextSchemaSourceSetCache.get(dataspaceName, schemaSetName) >> mockYangTextSchemaSourceSet
diff --git a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsModuleServiceImplSpec.groovy b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsModuleServiceImplSpec.groovy
index 615d3af35a..3884eda661 100644
--- a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsModuleServiceImplSpec.groovy
+++ b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsModuleServiceImplSpec.groovy
@@ -169,12 +169,11 @@ class CpsModuleServiceImplSpec extends Specification {
 
     def 'Delete multiple schema-sets when cascade is allowed.'() {
         given: '#numberOfAnchors anchors are associated with each schemaset'
-            mockCpsAdminService.getAnchors('my-dataspace', 'my-schemaset1') >> createAnchors(numberOfAnchors)
-            mockCpsAdminService.getAnchors('my-dataspace', 'my-schemaset2') >> createAnchors(numberOfAnchors)
+            mockCpsAdminService.getAnchors('my-dataspace', ['my-schemaset1', 'my-schemaset2']) >> createAnchors(numberOfAnchors * 2)
         when: 'schema set deletion is requested with cascade allowed'
             objectUnderTest.deleteSchemaSetsWithCascade('my-dataspace', ['my-schemaset1', 'my-schemaset2'])
-        then: 'anchor deletion is called 2 * #numberOfAnchors times'
-            (2 * numberOfAnchors) * mockCpsAdminService.deleteAnchor('my-dataspace', _)
+        then: 'anchor deletion is called #numberOfAnchors times'
+            mockCpsAdminService.deleteAnchors('my-dataspace', _)
         and: 'persistence service method is invoked with same parameters'
             mockCpsModulePersistenceService.deleteSchemaSets('my-dataspace', _)
         and: 'schema sets will be removed from the cache'