Update operation passthrough running - Service Layer
[cps.git] / cps-ncmp-service / src / main / java / org / onap / cps / ncmp / api / impl / NetworkCmProxyDataServiceImpl.java
index d6d1ec7..80cd297 100755 (executable)
@@ -3,6 +3,7 @@
  *  Copyright (C) 2021 highstreet technologies GmbH
  *  Modifications Copyright (C) 2021 Nordix Foundation
  *  Modifications Copyright (C) 2021 Pantheon.tech
+ *  Modifications Copyright (C) 2021 Bell Canada
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -24,20 +25,42 @@ package org.onap.cps.ncmp.api.impl;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.gson.Gson;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import java.time.OffsetDateTime;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.List;
+import java.util.Map;
+import javax.validation.constraints.NotNull;
 import lombok.extern.slf4j.Slf4j;
+import org.onap.cps.api.CpsAdminService;
 import org.onap.cps.api.CpsDataService;
+import org.onap.cps.api.CpsModuleService;
 import org.onap.cps.api.CpsQueryService;
 import org.onap.cps.ncmp.api.NetworkCmProxyDataService;
+import org.onap.cps.ncmp.api.impl.exception.NcmpException;
+import org.onap.cps.ncmp.api.impl.operation.DmiOperations;
 import org.onap.cps.ncmp.api.models.CmHandle;
 import org.onap.cps.ncmp.api.models.DmiPluginRegistration;
+import org.onap.cps.ncmp.api.models.GenericRequestBody;
+import org.onap.cps.ncmp.api.models.GenericRequestBody.OperationEnum;
 import org.onap.cps.ncmp.api.models.PersistenceCmHandle;
+import org.onap.cps.ncmp.api.models.PersistenceCmHandle.AdditionalProperty;
 import org.onap.cps.ncmp.api.models.PersistenceCmHandlesList;
+import org.onap.cps.ncmp.api.models.YangResource;
 import org.onap.cps.spi.FetchDescendantsOption;
+import org.onap.cps.spi.exceptions.DataNodeNotFoundException;
 import org.onap.cps.spi.exceptions.DataValidationException;
 import org.onap.cps.spi.model.DataNode;
+import org.onap.cps.spi.model.ModuleReference;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
 import org.springframework.util.StringUtils;
 
@@ -45,11 +68,17 @@ import org.springframework.util.StringUtils;
 @Service
 public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService {
 
-    private static final String NF_PROXY_DATASPACE_NAME = "NFP-Operational";
+    private static final String NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME = "NFP-Operational";
 
     private static final String NCMP_DATASPACE_NAME = "NCMP-Admin";
 
-    private static final String NCMP_ANCHOR_NAME = "ncmp-dmi-registry";
+    private static final String NCMP_DMI_REGISTRY_ANCHOR = "ncmp-dmi-registry";
+
+    private static final OffsetDateTime NO_TIMESTAMP = null;
+
+    private static  final String NCMP_DMI_SERVICE_NAME = "dmi-service-name";
+
+    private  static final String REVISION = "revision";
 
     private CpsDataService cpsDataService;
 
@@ -57,80 +86,479 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
 
     private CpsQueryService cpsQueryService;
 
+    private DmiOperations dmiOperations;
+
+    private CpsModuleService cpsModuleService;
+
+    private CpsAdminService cpsAdminService;
+
     /**
      * Constructor Injection for Dependencies.
+     * @param dmiOperations DMI operation
      * @param cpsDataService Data Service Interface
      * @param cpsQueryService Query Service Interface
      * @param objectMapper Object Mapper
      */
-    public NetworkCmProxyDataServiceImpl(final CpsDataService cpsDataService,
-        final CpsQueryService cpsQueryService, final ObjectMapper objectMapper) {
+    public NetworkCmProxyDataServiceImpl(final DmiOperations dmiOperations,
+        final CpsModuleService cpsModuleService,
+        final CpsDataService cpsDataService,
+        final CpsQueryService cpsQueryService,
+        final CpsAdminService cpsAdminService,
+        final ObjectMapper objectMapper) {
+        this.dmiOperations = dmiOperations;
+        this.cpsModuleService = cpsModuleService;
         this.cpsDataService = cpsDataService;
         this.cpsQueryService = cpsQueryService;
+        this.cpsAdminService = cpsAdminService;
         this.objectMapper = objectMapper;
     }
 
-    private String getDataspaceName() {
-        return NF_PROXY_DATASPACE_NAME;
-    }
-
     @Override
     public DataNode getDataNode(final String cmHandle, final String xpath,
         final FetchDescendantsOption fetchDescendantsOption) {
-        return cpsDataService.getDataNode(getDataspaceName(), cmHandle, xpath, fetchDescendantsOption);
+        return cpsDataService
+            .getDataNode(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, cmHandle, xpath, fetchDescendantsOption);
     }
 
     @Override
     public Collection<DataNode> queryDataNodes(final String cmHandle, final String cpsPath,
         final FetchDescendantsOption fetchDescendantsOption) {
-        return cpsQueryService.queryDataNodes(getDataspaceName(), cmHandle, cpsPath, fetchDescendantsOption);
+        return cpsQueryService
+            .queryDataNodes(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, cmHandle, cpsPath, fetchDescendantsOption);
     }
 
     @Override
     public void createDataNode(final String cmHandle, final String parentNodeXpath, final String jsonData) {
         if (!StringUtils.hasText(parentNodeXpath) || "/".equals(parentNodeXpath)) {
-            cpsDataService.saveData(getDataspaceName(), cmHandle, jsonData);
+            cpsDataService.saveData(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, cmHandle, jsonData, NO_TIMESTAMP);
         } else {
-            cpsDataService.saveData(getDataspaceName(), cmHandle, parentNodeXpath, jsonData);
+            cpsDataService
+                .saveData(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, cmHandle, parentNodeXpath, jsonData, NO_TIMESTAMP);
         }
     }
 
     @Override
     public void addListNodeElements(final String cmHandle, final String parentNodeXpath, final String jsonData) {
-        cpsDataService.saveListNodeData(getDataspaceName(), cmHandle, parentNodeXpath, jsonData);
+        cpsDataService.saveListElements(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, cmHandle, parentNodeXpath, jsonData,
+            NO_TIMESTAMP);
     }
 
     @Override
     public void updateNodeLeaves(final String cmHandle, final String parentNodeXpath, final String jsonData) {
-        cpsDataService.updateNodeLeaves(getDataspaceName(), cmHandle, parentNodeXpath, jsonData);
+        cpsDataService
+            .updateNodeLeaves(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, cmHandle, parentNodeXpath, jsonData,
+                NO_TIMESTAMP);
     }
 
     @Override
     public void replaceNodeTree(final String cmHandle, final String parentNodeXpath, final String jsonData) {
-        cpsDataService.replaceNodeTree(getDataspaceName(), cmHandle, parentNodeXpath, jsonData);
+        cpsDataService.replaceNodeTree(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, cmHandle, parentNodeXpath, jsonData,
+            NO_TIMESTAMP);
     }
 
     @Override
-    public void updateDmiPluginRegistration(final DmiPluginRegistration dmiPluginRegistration) {
+    public void updateDmiRegistrationAndSyncModule(final DmiPluginRegistration dmiPluginRegistration) {
         try {
-            final List<PersistenceCmHandle> persistenceCmHandles =
-                new ArrayList<>();
-            for (final CmHandle cmHandle: dmiPluginRegistration.getCreatedCmHandles()) {
-                final var persistenceCmHandle = new PersistenceCmHandle();
-                persistenceCmHandle.setDmiServiceName(dmiPluginRegistration.getDmiPlugin());
-                persistenceCmHandle.setId(cmHandle.getCmHandleID());
-                persistenceCmHandle.setAdditionalProperties(cmHandle.getCmHandleProperties());
-                persistenceCmHandles.add(persistenceCmHandle);
+            if (dmiPluginRegistration.getCreatedCmHandles() != null) {
+                parseAndCreateCmHandlesInDmiRegistrationAndSyncModule(dmiPluginRegistration);
+            }
+            if (dmiPluginRegistration.getUpdatedCmHandles() != null) {
+                parseAndUpdateCmHandlesInDmiRegistration(dmiPluginRegistration);
+            }
+            if (dmiPluginRegistration.getRemovedCmHandles() != null) {
+                parseAndRemoveCmHandlesInDmiRegistration(dmiPluginRegistration);
             }
-            final var persistenceCmHandlesList = new PersistenceCmHandlesList();
-            persistenceCmHandlesList.setCmHandles(persistenceCmHandles);
-            final var cmHandleJsonData = objectMapper.writeValueAsString(persistenceCmHandlesList);
-            cpsDataService.saveListNodeData(NCMP_DATASPACE_NAME, NCMP_ANCHOR_NAME, "/dmi-registry",
-                cmHandleJsonData);
         } catch (final JsonProcessingException e) {
-            throw new DataValidationException(
-                "Parsing error occurred while processing DMI Plugin Registration" + dmiPluginRegistration, e
-                .getMessage(), e);
+            handleJsonProcessingException(dmiPluginRegistration, e);
         }
     }
+
+    @Override
+    public Object getResourceDataOperationalForCmHandle(final @NotNull String cmHandle,
+                                                        final @NotNull String resourceIdentifier,
+                                                        final String acceptParamInHeader,
+                                                        final String optionsParamInQuery) {
+
+        final DataNode cmHandleDataNode = fetchDataNodeFromDmiRegistryForCmHandle(cmHandle);
+        final String dmiServiceName = String.valueOf(cmHandleDataNode.getLeaves().get(NCMP_DMI_SERVICE_NAME));
+        final String dmiRequestBody = getGenericRequestBody(cmHandleDataNode);
+        final ResponseEntity<Object> response = dmiOperations.getResourceDataOperationalFromDmi(dmiServiceName,
+                cmHandle,
+                resourceIdentifier,
+                optionsParamInQuery,
+                acceptParamInHeader,
+                dmiRequestBody);
+        return handleResponse(response);
+    }
+
+    @Override
+    public Object getResourceDataPassThroughRunningForCmHandle(final @NotNull String cmHandle,
+                                                               final @NotNull String resourceIdentifier,
+                                                               final String acceptParamInHeader,
+                                                               final String optionsParamInQuery) {
+        final DataNode cmHandleDataNode = fetchDataNodeFromDmiRegistryForCmHandle(cmHandle);
+        final String dmiServiceName = String.valueOf(cmHandleDataNode.getLeaves().get(NCMP_DMI_SERVICE_NAME));
+        final String dmiRequestBody = getGenericRequestBody(cmHandleDataNode);
+        final ResponseEntity<Object> response = dmiOperations.getResourceDataPassThroughRunningFromDmi(dmiServiceName,
+                cmHandle,
+                resourceIdentifier,
+                optionsParamInQuery,
+                acceptParamInHeader,
+                dmiRequestBody);
+        return handleResponse(response);
+    }
+
+    @Override
+    public void createResourceDataPassThroughRunningForCmHandle(final @NotNull String cmHandle,
+                                                                final @NotNull String resourceIdentifier,
+                                                                final @NotNull String requestBody,
+                                                                final String contentType) {
+        final DataNode cmHandleDataNode = fetchDataNodeFromDmiRegistryForCmHandle(cmHandle);
+        final String dmiServiceName = String.valueOf(cmHandleDataNode.getLeaves().get(NCMP_DMI_SERVICE_NAME));
+        final Collection<DataNode> cmHandlePropertiesAsDataNodes     = cmHandleDataNode.getChildDataNodes();
+        final Map<String, String> cmHandlePropertiesAsMap = getCmHandlePropertiesAsMap(cmHandlePropertiesAsDataNodes);
+        final GenericRequestBody dmiRequestBodyObject = GenericRequestBody.builder()
+                .operation(GenericRequestBody.OperationEnum.CREATE)
+                .dataType(contentType)
+                .data(requestBody)
+                .cmHandleProperties(cmHandlePropertiesAsMap)
+                .build();
+        final String dmiRequestBody = prepareOperationBody(dmiRequestBodyObject);
+        final ResponseEntity<String> responseEntity = dmiOperations
+                .createResourceDataPassThroughRunningFromDmi(dmiServiceName,
+                        cmHandle,
+                        resourceIdentifier,
+                        dmiRequestBody);
+        handleResponseFromDmi(responseEntity, "Not able to create resource data.");
+    }
+
+    @Override
+    public Collection<ModuleReference> getYangResourcesModuleReferences(final String cmHandle) {
+        return cpsModuleService.getYangResourcesModuleReferences(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, cmHandle);
+    }
+
+    /**
+     * Retrieve cm handle identifiers for the given list of module names.
+     *
+     * @param moduleNames module names.
+     * @return a collection of anchor identifiers
+     */
+    @Override
+    public Collection<String> executeCmHandleHasAllModulesSearch(final Collection<String> moduleNames) {
+        return cpsAdminService.queryAnchorNames(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, moduleNames);
+    }
+
+    /**
+     * Update resource data for data store pass-through running using dmi for given cm-handle.
+     *
+     * @param cmHandle           cm handle
+     * @param resourceIdentifier resource identifier
+     * @param requestBody        request body to create resource
+     * @param contentType        content type in body
+     */
+    @Override
+    public void updateResourceDataPassThroughRunningForCmHandle(final String cmHandle, final String resourceIdentifier,
+        final String requestBody, final String contentType) {
+        final DataNode cmHandleDataNode = fetchDataNodeFromDmiRegistryForCmHandle(cmHandle);
+        final String dmiServiceName = String.valueOf(cmHandleDataNode.getLeaves().get(NCMP_DMI_SERVICE_NAME));
+        final Collection<DataNode> cmHandlePropertiesAsDataNodes = cmHandleDataNode.getChildDataNodes();
+        final Map<String, String> cmHandlePropertiesAsMap = getCmHandlePropertiesAsMap(cmHandlePropertiesAsDataNodes);
+        final GenericRequestBody dmiRequestBodyObject = GenericRequestBody.builder()
+            .operation(OperationEnum.UPDATE)
+            .dataType(contentType)
+            .data(requestBody)
+            .cmHandleProperties(cmHandlePropertiesAsMap)
+            .build();
+        final String dmiRequestBody = prepareOperationBody(dmiRequestBodyObject);
+        final ResponseEntity<String> responseEntity = dmiOperations
+            .updateResourceDataPassThroughRunningFromDmi(dmiServiceName,
+                cmHandle,
+                resourceIdentifier,
+                dmiRequestBody);
+        handleResponseFromDmi(responseEntity, "Unable to replace resource data.");
+    }
+
+    private DataNode fetchDataNodeFromDmiRegistryForCmHandle(final String cmHandle) {
+        final String xpathForDmiRegistryToFetchCmHandle = "/dmi-registry/cm-handles[@id='" + cmHandle + "']";
+        return cpsDataService.getDataNode(NCMP_DATASPACE_NAME,
+                NCMP_DMI_REGISTRY_ANCHOR,
+                xpathForDmiRegistryToFetchCmHandle,
+                FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
+    }
+
+    private String prepareOperationBody(final GenericRequestBody requestBodyObject) {
+        try {
+            return objectMapper.writeValueAsString(requestBodyObject);
+        } catch (final JsonProcessingException e) {
+            log.error("Parsing error occurred while converting Object to JSON.");
+            throw new NcmpException("Parsing error occurred while converting given object to JSON.",
+                e.getMessage());
+        }
+    }
+
+    private static Map<String, String> getCmHandlePropertiesAsMap(
+            final Collection<DataNode> cmHandlePropertiesAsDataNode) {
+        if (cmHandlePropertiesAsDataNode.isEmpty()) {
+            return Collections.emptyMap();
+        }
+        final Map<String, String> cmHandlePropertiesAsMap = new LinkedHashMap<>();
+        for (final DataNode dataNode: cmHandlePropertiesAsDataNode) {
+            cmHandlePropertiesAsMap.put(String.valueOf(dataNode.getLeaves().get("name")),
+                    String.valueOf(dataNode.getLeaves().get("value")));
+        }
+        return cmHandlePropertiesAsMap;
+    }
+
+    private static Map<String, String> getCmHandlePropertiesAsMap(
+            final List<AdditionalProperty> cmHandlePropertiesAsList) {
+        if (cmHandlePropertiesAsList == null || cmHandlePropertiesAsList.isEmpty()) {
+            return Collections.emptyMap();
+        }
+        final Map<String, String> cmHandlePropertiesAsMap = new LinkedHashMap<>();
+        for (final AdditionalProperty additionalProperty: cmHandlePropertiesAsList) {
+            cmHandlePropertiesAsMap.put(additionalProperty.getName(),
+                    additionalProperty.getValue());
+        }
+        return cmHandlePropertiesAsMap;
+    }
+
+    private static Object handleResponse(final @NotNull ResponseEntity<Object> responseEntity) {
+        if (responseEntity.getStatusCode() == HttpStatus.OK) {
+            return responseEntity.getBody();
+        } else {
+            throw new NcmpException("Not able to get resource data.",
+                    "DMI status code: " + responseEntity.getStatusCodeValue()
+                            + ", DMI response body: " + responseEntity.getBody());
+        }
+    }
+
+    private static void handleResponseFromDmi(final @NotNull ResponseEntity<String> responseEntity,
+        final String exceptionMessage) {
+        if (!HttpStatus.valueOf(responseEntity.getStatusCodeValue()).is2xxSuccessful()) {
+            throw new NcmpException(exceptionMessage,
+                "DMI status code: " + responseEntity.getStatusCodeValue()
+                    + ", DMI response body: " + responseEntity.getBody());
+        }
+    }
+
+    private String getGenericRequestBody(final DataNode cmHandleDataNode) {
+        final Collection<DataNode> cmHandlePropertiesAsDataNodes = cmHandleDataNode.getChildDataNodes();
+        final Map<String, String> cmHandlePropertiesAsMap = getCmHandlePropertiesAsMap(cmHandlePropertiesAsDataNodes);
+        final GenericRequestBody requestBodyObject = GenericRequestBody.builder()
+                .operation(GenericRequestBody.OperationEnum.READ)
+                .cmHandleProperties(cmHandlePropertiesAsMap)
+                .build();
+        return prepareOperationBody(requestBodyObject);
+    }
+
+    private void parseAndUpdateCmHandlesInDmiRegistration(final DmiPluginRegistration dmiPluginRegistration)
+        throws JsonProcessingException {
+        final PersistenceCmHandlesList updatedPersistenceCmHandlesList = toPersistenceCmHandlesList(
+            dmiPluginRegistration.getDmiPlugin(),
+            dmiPluginRegistration.getUpdatedCmHandles());
+        final String cmHandlesAsJson = objectMapper.writeValueAsString(updatedPersistenceCmHandlesList);
+        cpsDataService.updateNodeLeavesAndExistingDescendantLeaves(NCMP_DATASPACE_NAME, NCMP_DMI_REGISTRY_ANCHOR,
+                "/dmi-registry", cmHandlesAsJson, NO_TIMESTAMP);
+    }
+
+    private void parseAndCreateCmHandlesInDmiRegistrationAndSyncModule(
+        final DmiPluginRegistration dmiPluginRegistration) throws JsonProcessingException {
+        final PersistenceCmHandlesList createdPersistenceCmHandlesList = toPersistenceCmHandlesList(
+            dmiPluginRegistration.getDmiPlugin(),
+            dmiPluginRegistration.getCreatedCmHandles());
+        registerAndSyncNewCmHandles(createdPersistenceCmHandlesList);
+    }
+
+    private static PersistenceCmHandlesList toPersistenceCmHandlesList(final String dmiPlugin,
+                                                                       final Collection<CmHandle> cmHandles) {
+        final PersistenceCmHandlesList persistenceCmHandlesList = new PersistenceCmHandlesList();
+        for (final CmHandle cmHandle : cmHandles) {
+            final PersistenceCmHandle persistenceCmHandle = toPersistenceCmHandle(dmiPlugin, cmHandle);
+            persistenceCmHandlesList.add(persistenceCmHandle);
+        }
+        return persistenceCmHandlesList;
+    }
+
+    private static void handleJsonProcessingException(final DmiPluginRegistration dmiPluginRegistration,
+                                                      final JsonProcessingException e) {
+        final String message = "Parsing error occurred while processing DMI Plugin Registration"
+            + dmiPluginRegistration;
+        log.error(message);
+        throw new DataValidationException(message, e.getMessage(), e);
+    }
+
+    private void registerAndSyncNewCmHandles(final PersistenceCmHandlesList persistenceCmHandlesList)
+        throws JsonProcessingException  {
+        final String cmHandleJsonData = objectMapper.writeValueAsString(persistenceCmHandlesList);
+        cpsDataService.saveListElements(NCMP_DATASPACE_NAME, NCMP_DMI_REGISTRY_ANCHOR, "/dmi-registry",
+            cmHandleJsonData, NO_TIMESTAMP);
+
+        for (final PersistenceCmHandle persistenceCmHandle : persistenceCmHandlesList.getPersistenceCmHandles()) {
+            syncModulesAndCreateAnchor(persistenceCmHandle);
+        }
+    }
+
+    protected void syncModulesAndCreateAnchor(final PersistenceCmHandle persistenceCmHandle) {
+        fetchAndSyncModules(persistenceCmHandle);
+        createAnchor(persistenceCmHandle);
+    }
+
+    private static PersistenceCmHandle toPersistenceCmHandle(final String dmiPluginService,
+                                                             final CmHandle cmHandle) {
+        final PersistenceCmHandle persistenceCmHandle = new PersistenceCmHandle();
+        persistenceCmHandle.setDmiServiceName(dmiPluginService);
+        persistenceCmHandle.setId(cmHandle.getCmHandleID());
+        if (cmHandle.getCmHandleProperties() == null) {
+            persistenceCmHandle.setAdditionalProperties(Collections.emptyMap());
+        } else {
+            persistenceCmHandle.setAdditionalProperties(cmHandle.getCmHandleProperties());
+        }
+        return persistenceCmHandle;
+    }
+
+    private void parseAndRemoveCmHandlesInDmiRegistration(final DmiPluginRegistration dmiPluginRegistration) {
+        for (final String cmHandle : dmiPluginRegistration.getRemovedCmHandles()) {
+            try {
+                cpsDataService.deleteListOrListElement(NCMP_DATASPACE_NAME, NCMP_DMI_REGISTRY_ANCHOR,
+                    "/dmi-registry/cm-handles[@id='" + cmHandle + "']", NO_TIMESTAMP);
+            } catch (final DataNodeNotFoundException e) {
+                log.warn("Datanode {} not deleted message {}", cmHandle, e.getMessage());
+            }
+        }
+    }
+
+    private void fetchAndSyncModules(final PersistenceCmHandle persistenceCmHandle) {
+        final Map<String, String> cmHandlePropertiesAsMap = getCmHandlePropertiesAsMap(
+            persistenceCmHandle.getAdditionalProperties());
+
+        final List<ModuleReference> moduleReferencesFromCmHandle =
+            fetchModuleReferencesFromDmi(persistenceCmHandle, cmHandlePropertiesAsMap);
+        final List<ModuleReference> existingModuleReferences = new ArrayList<>();
+        final List<ModuleReference> unknownModuleReferences = new ArrayList<>();
+        prepareModuleSubsets(moduleReferencesFromCmHandle, existingModuleReferences, unknownModuleReferences);
+
+        final Map<String, String> newYangResourcesModuleNameToContentMap;
+        if (unknownModuleReferences.isEmpty()) {
+            newYangResourcesModuleNameToContentMap = new HashMap<>();
+        } else {
+            newYangResourcesModuleNameToContentMap = getNewYangResourcesFromDmi(persistenceCmHandle,
+                unknownModuleReferences, cmHandlePropertiesAsMap);
+        }
+        cpsModuleService
+            .createSchemaSetFromModules(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, persistenceCmHandle.getId(),
+                newYangResourcesModuleNameToContentMap, existingModuleReferences);
+    }
+
+    private void prepareModuleSubsets(final List<ModuleReference> moduleReferencesFromCmHandle,
+                                      final List<ModuleReference> existingModuleReferences,
+                                      final List<ModuleReference> unknownModuleReferences) {
+
+        final Collection<ModuleReference> knownModuleReferencesInCps =
+            cpsModuleService.getYangResourceModuleReferences(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME);
+
+        for (final ModuleReference moduleReferenceFromDmiForCmHandle : moduleReferencesFromCmHandle) {
+            if (knownModuleReferencesInCps.contains(moduleReferenceFromDmiForCmHandle)) {
+                existingModuleReferences.add(moduleReferenceFromDmiForCmHandle);
+            } else {
+                unknownModuleReferences.add(moduleReferenceFromDmiForCmHandle);
+            }
+        }
+    }
+
+    private List<ModuleReference> fetchModuleReferencesFromDmi(final PersistenceCmHandle persistenceCmHandle,
+                                                               final Map<String, String> cmHandlePropertiesAsMap) {
+        final GenericRequestBody genericRequestBody = GenericRequestBody.builder()
+                .cmHandleProperties(cmHandlePropertiesAsMap)
+                .build();
+        final String jsonBodyWithOnlyCmHandleProperties = prepareOperationBody(genericRequestBody);
+        final ResponseEntity<String> dmiFetchModulesResponseEntity =
+            dmiOperations.getResourceFromDmiWithJsonData(persistenceCmHandle.getDmiServiceName(),
+                    jsonBodyWithOnlyCmHandleProperties, persistenceCmHandle.getId(), "modules");
+        return toModuleReferences(dmiFetchModulesResponseEntity);
+    }
+
+    private void createAnchor(final PersistenceCmHandle persistenceCmHandle) {
+        cpsAdminService.createAnchor(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, persistenceCmHandle.getId(),
+            persistenceCmHandle.getId());
+    }
+
+    private String getRequestBodyToFetchYangResourceFromDmi(final List<ModuleReference> unknownModuleReferences,
+                                                            final Map<String, String> cmHandlePropertiesAsMap) {
+        final JsonArray moduleReferencesAsJson = getModuleReferencesAsJson(unknownModuleReferences);
+        final JsonObject data = new JsonObject();
+        data.add("modules", moduleReferencesAsJson);
+        final JsonObject jsonRequestObject = new JsonObject();
+        jsonRequestObject.add("data", data);
+        final Gson gson = new Gson();
+        jsonRequestObject.add("cmHandleProperties", gson.toJsonTree(cmHandlePropertiesAsMap));
+        return jsonRequestObject.toString();
+    }
+
+    private static JsonArray getModuleReferencesAsJson(final List<ModuleReference> unknownModuleReferences) {
+        final JsonArray moduleReferences = new JsonArray();
+
+        for (final ModuleReference moduleReference : unknownModuleReferences) {
+            final JsonObject moduleReferenceAsJson = new JsonObject();
+            moduleReferenceAsJson.addProperty("name", moduleReference.getModuleName());
+            moduleReferenceAsJson.addProperty(REVISION, moduleReference.getRevision());
+            moduleReferences.add(moduleReferenceAsJson);
+        }
+        return moduleReferences;
+    }
+
+    private Map<String, String> getNewYangResourcesFromDmi(final PersistenceCmHandle persistenceCmHandle,
+                                                           final List<ModuleReference> unknownModuleReferences,
+                                                           final Map<String, String> cmHandlePropertiesAsMap) {
+        final String jsonDataWithDataAndCmHandleProperties = getRequestBodyToFetchYangResourceFromDmi(
+                unknownModuleReferences, cmHandlePropertiesAsMap);
+
+        final ResponseEntity<String> moduleResourcesAsJsonString =  dmiOperations.getResourceFromDmiWithJsonData(
+                persistenceCmHandle.getDmiServiceName(),
+                jsonDataWithDataAndCmHandleProperties,
+                persistenceCmHandle.getId(),
+                "moduleResources");
+
+        final JsonArray moduleResources = new Gson().fromJson(moduleResourcesAsJsonString.getBody(),
+            JsonArray.class);
+        final Map<String, String> newYangResourcesModuleNameToContentMap = new HashMap<>();
+
+        for (final JsonElement moduleResource : moduleResources) {
+            final YangResource yangResource = toYangResource((JsonObject) moduleResource);
+            newYangResourcesModuleNameToContentMap.put(yangResource.getModuleName(), yangResource.getYangSource());
+        }
+        return newYangResourcesModuleNameToContentMap;
+    }
+
+    private static YangResource toYangResource(final JsonObject yangResourceAsJson) {
+        final YangResource yangResource = new YangResource();
+        yangResource.setModuleName(yangResourceAsJson.get("moduleName").getAsString());
+        yangResource.setRevision(yangResourceAsJson.get(REVISION).getAsString());
+        final String yangSourceJson = yangResourceAsJson.get("yangSource").getAsString();
+
+        String yangSource = JsonUtils.removeWrappingTokens(yangSourceJson);
+        yangSource = JsonUtils.removeRedundantEscapeCharacters(yangSource);
+        yangResource.setYangSource(yangSource);
+
+        return yangResource;
+    }
+
+    private static List<ModuleReference> toModuleReferences(
+            final ResponseEntity<String> dmiFetchModulesResponseEntity) {
+        final List<ModuleReference> moduleReferences = new ArrayList<>();
+        final JsonObject bodyAsJsonObject = new Gson().fromJson(dmiFetchModulesResponseEntity.getBody(),
+            JsonObject.class);
+        final JsonArray moduleReferencesAsJson = bodyAsJsonObject.getAsJsonArray("schemas");
+        for (final JsonElement moduleReferenceAsJson : moduleReferencesAsJson) {
+            final ModuleReference moduleReference = toModuleReference((JsonObject) moduleReferenceAsJson);
+            moduleReferences.add(moduleReference);
+        }
+        return moduleReferences;
+    }
+
+    private static ModuleReference toModuleReference(final JsonObject moduleReferenceAsJson) {
+        final ModuleReference moduleReference = new ModuleReference();
+        moduleReference.setModuleName(moduleReferenceAsJson.get("moduleName").getAsString());
+        moduleReference.setRevision(moduleReferenceAsJson.get(REVISION).getAsString());
+        return moduleReference;
+    }
 }