Allow separate registration of DMIDataPlugin and DmiModelPugin

Moved relevant code from NetworkCmProxyDataServiceImp to DmiOperations
Split DmiOperations into DMiData... and DMIModelOperations
Merged update-operation changes
Added tests for error message validation in NetworkCmProxyDataServiceImplSpec
Removede @Service from DMIOperations and added @component to
DmiDataOperations & DmiModelOperations
Verify sync robot test is now hardened
Added exitonfailure so robot tests stop after first encountered failed
test

Issue-ID: CPS-736
Change-Id: I0b40931cc8cd4fc0452328a0a7e0f60e6fc38d0a
Signed-off-by: JosephKeenan <joseph.keenan@est.tech>
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Signed-off-by: DylanB95EST <dylan.byrne@est.tech>

15 files changed, 772 insertions, 504 deletions

diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/NetworkCmProxyDataService.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/NetworkCmProxyDataService.java
index 45d5bd911..ec816ed73 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/NetworkCmProxyDataService.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/NetworkCmProxyDataService.java
@@ -22,8 +22,9 @@
 
 package org.onap.cps.ncmp.api;
 
+import static org.onap.cps.ncmp.api.impl.operations.DmiRequestBody.OperationEnum;
+
 import java.util.Collection;
-import javax.validation.constraints.NotNull;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.onap.cps.ncmp.api.models.DmiPluginRegistration;
 import org.onap.cps.spi.FetchDescendantsOption;
@@ -118,8 +119,8 @@ public interface NetworkCmProxyDataService {
      * @param optionsParamInQuery options query
      * @return {@code Object} resource data
      */
-    Object getResourceDataOperationalForCmHandle(@NotNull String cmHandle,
-                                                 @NotNull String resourceIdentifier,
+    Object getResourceDataOperationalForCmHandle(String cmHandle,
+                                                 String resourceIdentifier,
                                                  String acceptParamInHeader,
                                                  String optionsParamInQuery);
 
@@ -133,24 +134,25 @@ public interface NetworkCmProxyDataService {
      * @param optionsParamInQuery options query
      * @return {@code Object} resource data
      */
-    Object getResourceDataPassThroughRunningForCmHandle(@NotNull String cmHandle,
-                                                        @NotNull String resourceIdentifier,
+    Object getResourceDataPassThroughRunningForCmHandle(String cmHandle,
+                                                        String resourceIdentifier,
                                                         String acceptParamInHeader,
                                                         String optionsParamInQuery);
 
     /**
-     * Create resource data for data store pass-through running
+     * Write resource data for data store pass-through running
      * using dmi for given cm-handle.
-     *
-     * @param cmHandle cm handle
+     *  @param cmHandle cm handle
      * @param resourceIdentifier resource identifier
+     * @param operation required operation
      * @param requestBody request body to create resource
      * @param contentType content type in body
      */
-    void createResourceDataPassThroughRunningForCmHandle(@NotNull String cmHandle,
-                                                         @NotNull String resourceIdentifier,
-                                                         @NotNull String requestBody,
-                                                         String contentType);
+    void writeResourceDataPassThroughRunningForCmHandle(String cmHandle,
+                                                        String resourceIdentifier,
+                                                        OperationEnum operation,
+                                                        String requestBody,
+                                                        String contentType);
 
     /**
      * Retrieve module references for the given cm handle.
@@ -158,7 +160,7 @@ public interface NetworkCmProxyDataService {
      * @param cmHandle cm handle
      * @return a collection of modules names and revisions
      */
-    Collection<ModuleReference> getYangResourcesModuleReferences(@NotNull String cmHandle);
+    Collection<ModuleReference> getYangResourcesModuleReferences(String cmHandle);
 
     /**
      * Query cm handle identifiers for the given collection of module names.
@@ -169,14 +171,4 @@ public interface NetworkCmProxyDataService {
      */
     Collection<String> executeCmHandleHasAllModulesSearch(Collection<String> moduleNames);
 
-    /**
-     * Update resource data for data store pass-through running using dmi for the given cm-handle.
-     *
-     * @param cmHandle cm handle
-     * @param resourceIdentifier resource identifier
-     * @param requestBody request body to create resource
-     * @param contentType content type in body
-     */
-    void updateResourceDataPassThroughRunningForCmHandle(String cmHandle, String resourceIdentifier,
-        String requestBody, String contentType);
 }
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/NetworkCmProxyDataServiceImpl.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/NetworkCmProxyDataServiceImpl.java
index 80cd29728..fb929a234 100755
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/NetworkCmProxyDataServiceImpl.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/NetworkCmProxyDataServiceImpl.java
@@ -23,6 +23,8 @@
 
 package org.onap.cps.ncmp.api.impl;
 
+import static org.onap.cps.ncmp.api.impl.operations.DmiRequestBody.OperationEnum;
+
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.gson.Gson;
@@ -32,12 +34,9 @@ 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;
@@ -45,13 +44,12 @@ 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.impl.operations.DmiDataOperations;
+import org.onap.cps.ncmp.api.impl.operations.DmiModelOperations;
+import org.onap.cps.ncmp.api.impl.operations.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;
@@ -59,7 +57,6 @@ 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;
@@ -76,17 +73,15 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
 
     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;
 
     private ObjectMapper objectMapper;
 
     private CpsQueryService cpsQueryService;
 
-    private DmiOperations dmiOperations;
+    private DmiDataOperations dmiDataOperations;
+
+    private DmiModelOperations dmiModelOperations;
 
     private CpsModuleService cpsModuleService;
 
@@ -94,18 +89,20 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
 
     /**
      * Constructor Injection for Dependencies.
-     * @param dmiOperations DMI operation
+     * @param dmiDataOperations DMI operation
      * @param cpsDataService Data Service Interface
      * @param cpsQueryService Query Service Interface
      * @param objectMapper Object Mapper
      */
-    public NetworkCmProxyDataServiceImpl(final DmiOperations dmiOperations,
-        final CpsModuleService cpsModuleService,
-        final CpsDataService cpsDataService,
-        final CpsQueryService cpsQueryService,
-        final CpsAdminService cpsAdminService,
-        final ObjectMapper objectMapper) {
-        this.dmiOperations = dmiOperations;
+    public NetworkCmProxyDataServiceImpl(final DmiDataOperations dmiDataOperations,
+                                         final DmiModelOperations dmiModelOperations,
+                                         final CpsModuleService cpsModuleService,
+                                         final CpsDataService cpsDataService,
+                                         final CpsQueryService cpsQueryService,
+                                         final CpsAdminService cpsAdminService,
+                                         final ObjectMapper objectMapper) {
+        this.dmiDataOperations = dmiDataOperations;
+        this.dmiModelOperations = dmiModelOperations;
         this.cpsModuleService = cpsModuleService;
         this.cpsDataService = cpsDataService;
         this.cpsQueryService = cpsQueryService;
@@ -158,9 +155,10 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
 
     @Override
     public void updateDmiRegistrationAndSyncModule(final DmiPluginRegistration dmiPluginRegistration) {
+        dmiPluginRegistration.validateDmiPluginRegistration();
         try {
             if (dmiPluginRegistration.getCreatedCmHandles() != null) {
-                parseAndCreateCmHandlesInDmiRegistrationAndSyncModule(dmiPluginRegistration);
+                parseAndCreateCmHandlesInDmiRegistrationAndSyncModules(dmiPluginRegistration);
             }
             if (dmiPluginRegistration.getUpdatedCmHandles() != null) {
                 parseAndUpdateCmHandlesInDmiRegistration(dmiPluginRegistration);
@@ -174,64 +172,44 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
     }
 
     @Override
-    public Object getResourceDataOperationalForCmHandle(final @NotNull String cmHandle,
-                                                        final @NotNull String resourceIdentifier,
+    public Object getResourceDataOperationalForCmHandle(final String cmHandle,
+                                                        final 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);
+        return handleResponse(dmiDataOperations.getResourceDataFromDmi(
+            cmHandle,
+            resourceIdentifier,
+            optionsParamInQuery,
+            acceptParamInHeader,
+            DmiOperations.DataStoreEnum.PASSTHROUGH_OPERATIONAL), "Not able to get resource data.");
     }
 
     @Override
-    public Object getResourceDataPassThroughRunningForCmHandle(final @NotNull String cmHandle,
-                                                               final @NotNull String resourceIdentifier,
+    public Object getResourceDataPassThroughRunningForCmHandle(final String cmHandle,
+                                                               final 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);
+        return handleResponse(dmiDataOperations.getResourceDataFromDmi(
+            cmHandle,
+            resourceIdentifier,
+            optionsParamInQuery,
+            acceptParamInHeader,
+            DmiOperations.DataStoreEnum.PASSTHROUGH_RUNNING), "Not able to get resource data.");
     }
 
     @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.");
+    public void writeResourceDataPassThroughRunningForCmHandle(final String cmHandle,
+                                                               final String resourceIdentifier,
+                                                               final OperationEnum operation,
+                                                               final String requestData,
+                                                               final String dataType) {
+        handleResponse(
+            dmiDataOperations.writeResourceDataPassThroughRunningFromDmi(
+                cmHandle, resourceIdentifier, operation, requestData, dataType),
+            "Not able to " + operation + " resource data.");
     }
 
+
     @Override
     public Collection<ModuleReference> getYangResourcesModuleReferences(final String cmHandle) {
         return cpsModuleService.getYangResourcesModuleReferences(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, cmHandle);
@@ -249,134 +227,46 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
     }
 
     /**
-     * Update resource data for data store pass-through running using dmi for given cm-handle.
+     * THis method registers a cm handle and intiates modules sync.
      *
-     * @param cmHandle           cm handle
-     * @param resourceIdentifier resource identifier
-     * @param requestBody        request body to create resource
-     * @param contentType        content type in body
+     * @param dmiPluginRegistration dmi plugin registration information.
+     * @throws JsonProcessingException thrown if json is malformed or missing.
      */
-    @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;
+    public void parseAndCreateCmHandlesInDmiRegistrationAndSyncModules(
+        final DmiPluginRegistration dmiPluginRegistration) throws JsonProcessingException {
+        final PersistenceCmHandlesList createdPersistenceCmHandlesList =
+            getUpdatedPersistenceCmHandlesList(dmiPluginRegistration, dmiPluginRegistration.getCreatedCmHandles());
+        registerAndSyncNewCmHandles(createdPersistenceCmHandlesList);
     }
 
-    private static Object handleResponse(final @NotNull ResponseEntity<Object> responseEntity) {
-        if (responseEntity.getStatusCode() == HttpStatus.OK) {
+    private static Object handleResponse(final ResponseEntity<?> responseEntity,
+                                         final String exceptionMessage) {
+        if (responseEntity.getStatusCode().is2xxSuccessful()) {
             return responseEntity.getBody();
         } else {
-            throw new NcmpException("Not able to get resource data.",
+            throw new NcmpException(exceptionMessage,
                     "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 PersistenceCmHandlesList updatedPersistenceCmHandlesList =
+            getUpdatedPersistenceCmHandlesList(dmiPluginRegistration, 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(
+    private PersistenceCmHandlesList getUpdatedPersistenceCmHandlesList(
+        final DmiPluginRegistration dmiPluginRegistration,
+        final List<CmHandle> updatedCmHandles) {
+        return PersistenceCmHandlesList.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;
+            dmiPluginRegistration.getDmiDataPlugin(),
+            dmiPluginRegistration.getDmiModelPlugin(),
+            updatedCmHandles);
     }
 
     private static void handleJsonProcessingException(final DmiPluginRegistration dmiPluginRegistration,
@@ -403,19 +293,6 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
         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 {
@@ -428,11 +305,9 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
     }
 
     private void fetchAndSyncModules(final PersistenceCmHandle persistenceCmHandle) {
-        final Map<String, String> cmHandlePropertiesAsMap = getCmHandlePropertiesAsMap(
-            persistenceCmHandle.getAdditionalProperties());
 
         final List<ModuleReference> moduleReferencesFromCmHandle =
-            fetchModuleReferencesFromDmi(persistenceCmHandle, cmHandlePropertiesAsMap);
+            toModuleReferences(dmiModelOperations.getModuleReferences(persistenceCmHandle));
         final List<ModuleReference> existingModuleReferences = new ArrayList<>();
         final List<ModuleReference> unknownModuleReferences = new ArrayList<>();
         prepareModuleSubsets(moduleReferencesFromCmHandle, existingModuleReferences, unknownModuleReferences);
@@ -442,7 +317,7 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
             newYangResourcesModuleNameToContentMap = new HashMap<>();
         } else {
             newYangResourcesModuleNameToContentMap = getNewYangResourcesFromDmi(persistenceCmHandle,
-                unknownModuleReferences, cmHandlePropertiesAsMap);
+                unknownModuleReferences);
         }
         cpsModuleService
             .createSchemaSetFromModules(NFP_OPERATIONAL_DATASTORE_DATASPACE_NAME, persistenceCmHandle.getId(),
@@ -465,60 +340,17 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
         }
     }
 
-    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(),
+                                                           final List<ModuleReference> unknownModuleReferences) {
+        final ResponseEntity<String> responseEntity =
+            dmiModelOperations.getNewYangResourcesFromDmi(persistenceCmHandle, unknownModuleReferences);
+
+        final JsonArray moduleResources = new Gson().fromJson(responseEntity.getBody(),
             JsonArray.class);
         final Map<String, String> newYangResourcesModuleNameToContentMap = new HashMap<>();
 
@@ -532,7 +364,7 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
     private static YangResource toYangResource(final JsonObject yangResourceAsJson) {
         final YangResource yangResource = new YangResource();
         yangResource.setModuleName(yangResourceAsJson.get("moduleName").getAsString());
-        yangResource.setRevision(yangResourceAsJson.get(REVISION).getAsString());
+        yangResource.setRevision(yangResourceAsJson.get("revision").getAsString());
         final String yangSourceJson = yangResourceAsJson.get("yangSource").getAsString();
 
         String yangSource = JsonUtils.removeWrappingTokens(yangSourceJson);
@@ -558,7 +390,7 @@ public class NetworkCmProxyDataServiceImpl implements NetworkCmProxyDataService
     private static ModuleReference toModuleReference(final JsonObject moduleReferenceAsJson) {
         final ModuleReference moduleReference = new ModuleReference();
         moduleReference.setModuleName(moduleReferenceAsJson.get("moduleName").getAsString());
-        moduleReference.setRevision(moduleReferenceAsJson.get(REVISION).getAsString());
+        moduleReference.setRevision(moduleReferenceAsJson.get("revision").getAsString());
         return moduleReference;
     }
 }
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/client/DmiRestClient.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/client/DmiRestClient.java
index fc70708f9..62eca9451 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/client/DmiRestClient.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/client/DmiRestClient.java
@@ -35,13 +35,28 @@ public class DmiRestClient {
     private RestTemplate restTemplate;
     private DmiProperties dmiProperties;
 
+    /**
+     * Constructor injection for DmiRestClient objects.
+     *
+     * @param restTemplate the rest template
+     * @param dmiProperties the DMI properties
+     */
     public DmiRestClient(final RestTemplate restTemplate, final DmiProperties dmiProperties) {
         this.restTemplate = restTemplate;
         this.dmiProperties = dmiProperties;
     }
 
+    /**
+     * Sends a PUT operation to DMI with JSON payload.
+     *
+     * @param dmiResourceUrl the DMI resource URL
+     * @param jsonData the JSON payload
+     * @param headers the HTTP headers
+     * @return response entity of type Object
+     */
     public ResponseEntity<Object> putOperationWithJsonData(final String dmiResourceUrl,
                                                             final String jsonData, final HttpHeaders headers) {
+        //TODO Toine Siebelink, should we use POST operation below instead (and return a String-Entity!)
         final var httpEntity = new HttpEntity<>(jsonData, configureHttpHeaders(headers));
         return restTemplate.exchange(dmiResourceUrl, HttpMethod.PUT, httpEntity, Object.class);
     }
@@ -76,4 +91,4 @@ public class DmiRestClient {
         final var httpEntity = new HttpEntity<>(configureHttpHeaders(httpHeaders));
         return restTemplate.exchange(dmiResourceUrl, HttpMethod.POST, httpEntity, String.class);
     }
-}
\ No newline at end of file
+}
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/config/NcmpConfiguration.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/config/NcmpConfiguration.java
index c4e82d329..81c9dff40 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/config/NcmpConfiguration.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/config/NcmpConfiguration.java
@@ -38,6 +38,8 @@ public class NcmpConfiguration {
         private String authUsername;
         @Value("${dmi.auth.password}")
         private String authPassword;
+        @Value("${dmi.api.base-path}")
+        private String dmiBasePath;
     }
 
     @Bean
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operation/DmiOperations.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operation/DmiOperations.java
deleted file mode 100644
index 40a47ecf6..000000000
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operation/DmiOperations.java
+++ /dev/null
@@ -1,229 +0,0 @@
-/*
- *  ============LICENSE_START=======================================================
- *  Copyright (C) 2021 Nordix Foundation
- *  ================================================================================
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- *
- *  SPDX-License-Identifier: Apache-2.0
- * ============LICENSE_END=========================================================
- */
-
-package org.onap.cps.ncmp.api.impl.operation;
-
-import com.fasterxml.jackson.annotation.JsonValue;
-import lombok.Getter;
-import org.onap.cps.ncmp.api.impl.client.DmiRestClient;
-import org.springframework.http.HttpHeaders;
-import org.springframework.http.ResponseEntity;
-import org.springframework.stereotype.Component;
-
-@Component
-public class DmiOperations {
-    @Getter
-    public enum DataStoreEnum {
-        PASSTHROUGH_OPERATIONAL("ncmp-datastore:passthrough-operational"),
-        PASSTHROUGH_RUNNING("ncmp-datastore:passthrough-running");
-        private String value;
-
-        DataStoreEnum(final String value) {
-            this.value = value;
-        }
-
-        @Override
-        @JsonValue
-        public String toString() {
-            return value;
-        }
-    }
-
-    private DmiRestClient dmiRestClient;
-    private static final String DMI_API_PATH = "/dmi";
-    private static final String DMI_CM_HANDLE_PATH = "/v1/ch/{cmHandle}";
-    private static final String DMI_CM_HANDLE_DATASTORE_PATH = DMI_CM_HANDLE_PATH + "/data/ds";
-    private static final String URL_SEPARATOR = "/";
-    private static final String RESOURCE_IDENTIFIER = "resourceIdentifier";
-    private static final String OPTIONS_QUERY_KEY = "options";
-
-
-    /**
-     * Constructor for {@code DmiOperations}. This method also manipulates url properties.
-     *
-     * @param dmiRestClient {@code DmiRestClient}
-     */
-    public DmiOperations(final DmiRestClient dmiRestClient) {
-        this.dmiRestClient = dmiRestClient;
-    }
-
-    /**
-     * Get resources from DMI.
-     *
-     * @param dmiServiceName dmi service name
-     * @param cmHandle cmHandle
-     * @param resourceName name of the resource(s)
-     * @return {@code ResponseEntity} response entity
-     */
-    public ResponseEntity<String> getResourceFromDmi(final String dmiServiceName,
-                                                     final String cmHandle,
-                                                     final String resourceName) {
-        final var dmiResourceDataUrl = getDmiResourceUrl(dmiServiceName, cmHandle, resourceName);
-        final var httpHeaders = new HttpHeaders();
-        return dmiRestClient.postOperation(dmiResourceDataUrl, httpHeaders);
-    }
-
-    /**
-     * Get resources from DMI for modules.
-     *
-     * @param dmiServiceName dmi service name
-     * @param jsonData module names and revisions as JSON
-     * @param cmHandle cmHandle
-     * @param resourceName name of the resource(s)
-     * @return {@code ResponseEntity} response entity
-     */
-    public ResponseEntity<String> getResourceFromDmiWithJsonData(final String dmiServiceName,
-                                                               final String jsonData,
-                                                               final String cmHandle,
-                                                               final String resourceName) {
-        final String dmiResourceDataUrl = getDmiResourceUrl(dmiServiceName, cmHandle, resourceName);
-        return dmiRestClient.postOperationWithJsonData(dmiResourceDataUrl, jsonData, new HttpHeaders());
-    }
-
-    /**
-     * This method fetches the resource data from operational data store for given cm handle
-     * identifier on given resource using dmi client.
-     *
-     * @param dmiServiceName dmi service name
-     * @param cmHandle    network resource identifier
-     * @param resourceId  resource identifier
-     * @param optionsParamInQuery options query
-     * @param acceptParamInHeader accept parameter
-     * @param jsonBody    json body for put operation
-     * @return {@code ResponseEntity} response entity
-     */
-    public ResponseEntity<Object> getResourceDataOperationalFromDmi(final String dmiServiceName,
-                                                                    final String cmHandle,
-                                                                    final String resourceId,
-                                                                    final String optionsParamInQuery,
-                                                                    final String acceptParamInHeader,
-                                                                    final String jsonBody) {
-        final var dmiResourceDataUrl = getDmiDatastoreUrl(dmiServiceName, cmHandle, resourceId,
-            optionsParamInQuery, DataStoreEnum.PASSTHROUGH_OPERATIONAL);
-        final var httpHeaders = prepareHeader(acceptParamInHeader);
-        return dmiRestClient.putOperationWithJsonData(dmiResourceDataUrl, jsonBody, httpHeaders);
-    }
-
-    /**
-     * This method fetches the resource data from pass-through running data store for given cm handle
-     * identifier on given resource using dmi client.
-     *
-     * @param dmiServiceName dmi service name
-     * @param cmHandle    network resource identifier
-     * @param resourceId  resource identifier
-     * @param optionsParamInQuery fields query
-     * @param acceptParamInHeader accept parameter
-     * @param jsonBody    json body for put operation
-     * @return {@code ResponseEntity} response entity
-     */
-    public ResponseEntity<Object> getResourceDataPassThroughRunningFromDmi(final String dmiServiceName,
-                                                                           final String cmHandle,
-                                                                           final String resourceId,
-                                                                           final String optionsParamInQuery,
-                                                                           final String acceptParamInHeader,
-                                                                           final String jsonBody) {
-        final var dmiResourceDataUrl = getDmiDatastoreUrl(dmiServiceName, cmHandle, resourceId,
-            optionsParamInQuery, DataStoreEnum.PASSTHROUGH_RUNNING);
-        final var httpHeaders = prepareHeader(acceptParamInHeader);
-        return dmiRestClient.putOperationWithJsonData(dmiResourceDataUrl, jsonBody, httpHeaders);
-    }
-
-    /**
-     * This method creates the resource data from pass-through running data store for given cm handle
-     * identifier on given resource using dmi client.
-     *
-     * @param dmiServiceName dmi service name
-     * @param cmHandle    network resource identifier
-     * @param resourceId  resource identifier
-     * @param jsonBody    json body for put operation
-     * @return {@code ResponseEntity} response entity
-     */
-    public ResponseEntity<String> createResourceDataPassThroughRunningFromDmi(final String dmiServiceName,
-                                                                            final String cmHandle,
-                                                                            final String resourceId,
-                                                                            final String jsonBody) {
-        final var stringBuilder = getStringBuilderForPassThroughUrl(dmiServiceName,
-            cmHandle, resourceId, DataStoreEnum.PASSTHROUGH_RUNNING);
-        return dmiRestClient.postOperationWithJsonData(stringBuilder.toString(), jsonBody, new HttpHeaders());
-    }
-
-    private String getDmiResourceUrl(final String dmiServiceName,
-                                     final String cmHandle,
-                                     final String resourceName) {
-        final var stringBuilder = new StringBuilder(dmiServiceName);
-        stringBuilder.append(DMI_API_PATH);
-        stringBuilder.append(DMI_CM_HANDLE_PATH.replace("{cmHandle}", cmHandle));
-        stringBuilder.append(URL_SEPARATOR + resourceName);
-        return stringBuilder.toString();
-    }
-
-    /**
-     * This method updates the resource data from pass-through running data store for the cm handle identifier on given
-     * resource using dmi client.
-     *
-     * @param dmiServiceName dmi service name
-     * @param cmHandle    network resource identifier
-     * @param resourceId  resource identifier
-     * @param jsonBody    json body for put operation
-     * @return {@code ResponseEntity} response entity
-     */
-    public ResponseEntity<String> updateResourceDataPassThroughRunningFromDmi(final String dmiServiceName,
-        final String cmHandle, final String resourceId, final String jsonBody) {
-        final StringBuilder stringBuilder =
-            getStringBuilderForPassThroughUrl(dmiServiceName, cmHandle, resourceId, DataStoreEnum.PASSTHROUGH_RUNNING);
-        return dmiRestClient.postOperationWithJsonData(stringBuilder.toString(), jsonBody, new HttpHeaders());
-    }
-
-    private String getDmiDatastoreUrl(final String dmiServiceName,
-                                      final String cmHandle,
-                                      final String resourceId,
-                                      final String optionsParamInQuery,
-                                      final DataStoreEnum dataStoreEnum) {
-        final var stringBuilder = getStringBuilderForPassThroughUrl(dmiServiceName,
-            cmHandle, resourceId, dataStoreEnum);
-        appendOptionsQuery(stringBuilder, optionsParamInQuery);
-        return stringBuilder.toString();
-    }
-
-    private StringBuilder getStringBuilderForPassThroughUrl(final String dmiServiceName,
-                                                            final String cmHandle,
-                                                            final String resourceId,
-                                                            final DataStoreEnum dataStoreEnum) {
-        final var stringBuilder = new StringBuilder(dmiServiceName);
-        stringBuilder.append(DMI_API_PATH);
-        stringBuilder.append(DMI_CM_HANDLE_DATASTORE_PATH.replace("{cmHandle}", cmHandle));
-        stringBuilder.append(URL_SEPARATOR + dataStoreEnum.getValue());
-        stringBuilder.append("?" + RESOURCE_IDENTIFIER + "=" + resourceId);
-        return stringBuilder;
-    }
-
-    private void appendOptionsQuery(final StringBuilder stringBuilder,
-                                    final String optionsParamInQuery) {
-        if (optionsParamInQuery != null) {
-            stringBuilder.append("&").append(OPTIONS_QUERY_KEY).append("=").append(optionsParamInQuery);
-        }
-    }
-
-    private HttpHeaders prepareHeader(final String acceptParam) {
-        final var httpHeaders = new HttpHeaders();
-        httpHeaders.set(HttpHeaders.ACCEPT, acceptParam);
-        return httpHeaders;
-    }
-}
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiDataOperations.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiDataOperations.java
new file mode 100644
index 000000000..b8336455c
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiDataOperations.java
@@ -0,0 +1,140 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation
+ *  ================================================================================
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ncmp.api.impl.operations;
+
+import static org.onap.cps.ncmp.api.impl.operations.DmiOperations.DataStoreEnum.PASSTHROUGH_RUNNING;
+import static org.onap.cps.ncmp.api.impl.operations.DmiRequestBody.OperationEnum;
+import static org.onap.cps.ncmp.api.impl.operations.DmiRequestBody.OperationEnum.READ;
+import static org.onap.cps.ncmp.api.impl.operations.RequiredDmiService.DATA;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.onap.cps.ncmp.api.impl.client.DmiRestClient;
+import org.onap.cps.ncmp.api.impl.config.NcmpConfiguration;
+import org.onap.cps.ncmp.api.models.PersistenceCmHandle;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Component;
+
+/**
+ * Operations class for DMI data.
+ */
+@Component
+public class DmiDataOperations extends DmiOperations {
+
+    /**
+     * Constructor for {@code DmiOperations}. This method also manipulates url properties.
+     *
+     * @param dmiRestClient {@code DmiRestClient}
+     */
+    public DmiDataOperations(final PersistenceCmHandleRetriever cmHandlePropertiesRetriever,
+                             final ObjectMapper objectMapper,
+                             final NcmpConfiguration.DmiProperties dmiProperties,
+                             final DmiRestClient dmiRestClient) {
+        super(cmHandlePropertiesRetriever, objectMapper, dmiProperties, dmiRestClient);
+    }
+
+    /**
+     * This method fetches the resource data from operational data store for given cm handle
+     * identifier on given resource using dmi client.
+     *
+     * @param cmHandle    network resource identifier
+     * @param resourceId  resource identifier
+     * @param optionsParamInQuery options query
+     * @param acceptParamInHeader accept parameter
+     * @param dataStore  data store enum
+     * @return {@code ResponseEntity} response entity
+     */
+    public ResponseEntity<Object> getResourceDataFromDmi(final String cmHandle,
+                                                          final String resourceId,
+                                                          final String optionsParamInQuery,
+                                                          final String acceptParamInHeader,
+                                                          final DataStoreEnum dataStore) {
+        final PersistenceCmHandle persistenceCmHandle =
+            cmHandlePropertiesRetriever.retrieveCmHandleDmiServiceNameAndProperties(cmHandle);
+        final DmiRequestBody dmiRequestBody = DmiRequestBody.builder()
+            .operation(READ)
+            .build();
+        dmiRequestBody.asCmHandleProperties(persistenceCmHandle.getAdditionalProperties());
+        final String jsonBody = getDmiRequestBodyAsString(dmiRequestBody);
+
+        final var dmiResourceDataUrl = getDmiDatastoreUrlWithOptions(
+            persistenceCmHandle.resolveDmiServiceName(DATA), cmHandle, resourceId,
+            optionsParamInQuery, dataStore);
+        final var httpHeaders = prepareHeader(acceptParamInHeader);
+        return dmiRestClient.putOperationWithJsonData(dmiResourceDataUrl, jsonBody, httpHeaders);
+    }
+
+    /**
+     * This method creates the resource data from pass-through running data store for given cm handle
+     * identifier on given resource using dmi client.
+     *
+     * @param cmHandle    network resource identifier
+     * @param resourceId  resource identifier
+     * @param operation   operation enum
+     * @param requestData the request data
+     * @param dataType    data type
+     * @return {@code ResponseEntity} response entity
+     */
+    public ResponseEntity<String> writeResourceDataPassThroughRunningFromDmi(final String cmHandle,
+                                                                             final String resourceId,
+                                                                             final OperationEnum operation,
+                                                                             final String requestData,
+                                                                             final String dataType) {
+        final PersistenceCmHandle persistenceCmHandle =
+            cmHandlePropertiesRetriever.retrieveCmHandleDmiServiceNameAndProperties(cmHandle);
+        final DmiRequestBody dmiRequestBody = DmiRequestBody.builder()
+            .operation(operation)
+            .data(requestData)
+            .dataType(dataType)
+            .build();
+        dmiRequestBody.asCmHandleProperties(persistenceCmHandle.getAdditionalProperties());
+        final String jsonBody = getDmiRequestBodyAsString(dmiRequestBody);
+        final String dmiUrl =
+            getResourceInDataStoreUrl(persistenceCmHandle.resolveDmiServiceName(DATA),
+            cmHandle, resourceId, PASSTHROUGH_RUNNING);
+        return dmiRestClient.postOperationWithJsonData(dmiUrl, jsonBody, new HttpHeaders());
+    }
+
+    private String getResourceInDataStoreUrl(final String dmiServiceName,
+                                             final String cmHandle,
+                                             final String resourceId,
+                                             final DataStoreEnum dataStoreEnum) {
+        return getCmHandleUrl(dmiServiceName, cmHandle)
+            + "data"
+            + URL_SEPARATOR
+            + "ds"
+            + URL_SEPARATOR
+            + dataStoreEnum.getValue()
+            + "?resourceIdentifier="
+            + resourceId;
+    }
+
+    private String getDmiDatastoreUrlWithOptions(final String dmiServiceName,
+                                                 final String cmHandle,
+                                                 final String resourceId,
+                                                 final String optionsParamInQuery,
+                                                 final DataStoreEnum dataStoreEnum) {
+        final String resourceInDataStoreUrl = getResourceInDataStoreUrl(dmiServiceName,
+            cmHandle, resourceId, dataStoreEnum);
+        return appendOptionsQuery(resourceInDataStoreUrl, optionsParamInQuery);
+    }
+
+}
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiModelOperations.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiModelOperations.java
new file mode 100644
index 000000000..c58258466
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiModelOperations.java
@@ -0,0 +1,133 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation
+ *  ================================================================================
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ncmp.api.impl.operations;
+
+import static org.onap.cps.ncmp.api.impl.operations.RequiredDmiService.MODEL;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+import java.util.List;
+import org.onap.cps.ncmp.api.impl.client.DmiRestClient;
+import org.onap.cps.ncmp.api.impl.config.NcmpConfiguration;
+import org.onap.cps.ncmp.api.models.PersistenceCmHandle;
+import org.onap.cps.spi.model.ModuleReference;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Component;
+
+@Component
+public class DmiModelOperations extends DmiOperations {
+
+    /**
+     * Constructor for {@code DmiOperations}. This method also manipulates url properties.
+     *
+     * @param dmiRestClient {@code DmiRestClient}
+     */
+    public DmiModelOperations(final PersistenceCmHandleRetriever cmHandlePropertiesRetriever,
+                              final ObjectMapper objectMapper,
+                              final NcmpConfiguration.DmiProperties dmiProperties,
+                              final DmiRestClient dmiRestClient) {
+        super(cmHandlePropertiesRetriever, objectMapper, dmiProperties, dmiRestClient);
+    }
+
+    /**
+     * Retrieves module references.
+     *
+     * @param persistenceCmHandle the persistence cm handle
+     * @return module references
+     */
+    public ResponseEntity<String> getModuleReferences(final PersistenceCmHandle persistenceCmHandle) {
+        final DmiRequestBody dmiRequestBody = DmiRequestBody.builder()
+            .build();
+        dmiRequestBody.asCmHandleProperties(persistenceCmHandle.getAdditionalProperties());
+        return getResourceFromDmiWithJsonData(persistenceCmHandle.resolveDmiServiceName(MODEL),
+            getDmiRequestBodyAsString(dmiRequestBody), persistenceCmHandle.getId(), "modules");
+    }
+
+    /**
+     * Retrieve yang resources from dmi for any modules that CPS-NCMP hasn't cached before.
+     *
+     * @param persistenceCmHandle the persistenceCmHandle
+     * @param unknownModuleReferences the unknown module references
+     * @return yang resources
+     */
+    public ResponseEntity<String>  getNewYangResourcesFromDmi(final PersistenceCmHandle persistenceCmHandle,
+                                                              final List<ModuleReference> unknownModuleReferences) {
+        final String jsonDataWithDataAndCmHandleProperties = getRequestBodyToFetchYangResources(
+            unknownModuleReferences, persistenceCmHandle.getAdditionalProperties());
+        return getResourceFromDmiWithJsonData(
+            persistenceCmHandle.resolveDmiServiceName(MODEL),
+            jsonDataWithDataAndCmHandleProperties,
+            persistenceCmHandle.getId(),
+            "moduleResources");
+    }
+
+    /**
+     * Get resources from DMI for modules.
+     *
+     * @param dmiServiceName dmi service name
+     * @param jsonData module names and revisions as JSON
+     * @param cmHandle cmHandle
+     * @param resourceName name of the resource(s)
+     * @return {@code ResponseEntity} response entity
+     */
+    private ResponseEntity<String> getResourceFromDmiWithJsonData(final String dmiServiceName,
+                                                                  final String jsonData,
+                                                                  final String cmHandle,
+                                                                  final String resourceName) {
+        final String dmiResourceDataUrl = getDmiResourceUrl(dmiServiceName, cmHandle, resourceName);
+        return dmiRestClient.postOperationWithJsonData(dmiResourceDataUrl, jsonData, new HttpHeaders());
+    }
+
+    private static String getRequestBodyToFetchYangResources(final List<ModuleReference> unknownModuleReferences,
+        final List<PersistenceCmHandle.AdditionalProperty> cmHandleProperties) {
+        final JsonArray moduleReferencesAsJson = getModuleReferencesAsJson(unknownModuleReferences);
+        final JsonObject data = new JsonObject();
+        data.add("modules", moduleReferencesAsJson);
+        final JsonObject jsonRequestObject = new JsonObject();
+        jsonRequestObject.add("data", data);
+        jsonRequestObject.add("cmHandleProperties", toJsonObject(cmHandleProperties));
+        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 static JsonObject toJsonObject(final List<PersistenceCmHandle.AdditionalProperty> cmHandleProperties) {
+        //TODO Toine/Joe Double check format with existing test data
+        final JsonObject asJsonObject = new JsonObject();
+        for (final PersistenceCmHandle.AdditionalProperty additionalProperty : cmHandleProperties) {
+            asJsonObject.addProperty(additionalProperty.getName(), additionalProperty.getValue());
+        }
+        return asJsonObject;
+    }
+
+}
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiOperations.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiOperations.java
new file mode 100644
index 000000000..509728061
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiOperations.java
@@ -0,0 +1,114 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation
+ *  ================================================================================
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ncmp.api.impl.operations;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.base.Strings;
+import lombok.Getter;
+import lombok.extern.slf4j.Slf4j;
+import org.onap.cps.ncmp.api.impl.client.DmiRestClient;
+import org.onap.cps.ncmp.api.impl.config.NcmpConfiguration;
+import org.onap.cps.ncmp.api.impl.exception.NcmpException;
+import org.springframework.http.HttpHeaders;
+
+@Slf4j
+public class DmiOperations {
+
+    @Getter
+    public enum DataStoreEnum {
+        PASSTHROUGH_OPERATIONAL("ncmp-datastore:passthrough-operational"),
+        PASSTHROUGH_RUNNING("ncmp-datastore:passthrough-running");
+        private String value;
+
+        DataStoreEnum(final String value) {
+            this.value = value;
+        }
+    }
+
+    protected ObjectMapper objectMapper;
+    protected PersistenceCmHandleRetriever cmHandlePropertiesRetriever;
+    protected DmiRestClient dmiRestClient;
+    protected NcmpConfiguration.DmiProperties dmiProperties;
+
+    static final String URL_SEPARATOR = "/";
+
+    /**
+     * Constructor for {@code DmiOperations}. This method also manipulates url properties.
+     *
+     * @param dmiRestClient {@code DmiRestClient}
+     */
+    public DmiOperations(final PersistenceCmHandleRetriever cmHandlePropertiesRetriever,
+                         final ObjectMapper objectMapper,
+                         final NcmpConfiguration.DmiProperties dmiProperties,
+                         final DmiRestClient dmiRestClient) {
+        this.cmHandlePropertiesRetriever = cmHandlePropertiesRetriever;
+        this.objectMapper = objectMapper;
+        this.dmiRestClient = dmiRestClient;
+        this.dmiProperties = dmiProperties;
+    }
+
+    String getCmHandleUrl(final String dmiServiceName, final String cmHandle) {
+        return dmiServiceName
+            + dmiProperties.getDmiBasePath()
+            + URL_SEPARATOR
+            + "v1"
+            + URL_SEPARATOR
+            + "ch"
+            + URL_SEPARATOR
+            + cmHandle
+            + URL_SEPARATOR;
+    }
+
+    String getDmiResourceUrl(final String dmiServiceName, final String cmHandle, final String resourceName) {
+        return getCmHandleUrl(dmiServiceName, cmHandle) + resourceName;
+    }
+
+    static String appendOptionsQuery(final String url, final String optionsParamInQuery) {
+        if (Strings.isNullOrEmpty(optionsParamInQuery)) {
+            return url;
+        }
+        return url + "&options=" + optionsParamInQuery;
+    }
+
+    static HttpHeaders prepareHeader(final String acceptParam) {
+        final var httpHeaders = new HttpHeaders();
+        httpHeaders.set(HttpHeaders.ACCEPT, acceptParam);
+        return httpHeaders;
+    }
+
+    /**
+     * Convert DmiRequestBody to JSON.
+     *
+     * @param dmiRequestBody the dmi request body
+     * @return DmiRequestBody as JSON
+     */
+    String getDmiRequestBodyAsString(final DmiRequestBody dmiRequestBody) {
+        try {
+            return objectMapper.writeValueAsString(dmiRequestBody);
+        } 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());
+        }
+    }
+
+}
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/GenericRequestBody.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiRequestBody.java
index 3e1ba4a97..13cfdcefe 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/GenericRequestBody.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/DmiRequestBody.java
@@ -18,19 +18,22 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.cps.ncmp.api.models;
+package org.onap.cps.ncmp.api.impl.operations;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonInclude.Include;
 import com.fasterxml.jackson.annotation.JsonValue;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
 import java.util.Map;
 import lombok.Builder;
 import lombok.Getter;
+import org.onap.cps.ncmp.api.models.PersistenceCmHandle;
 
-@JsonInclude(Include.NON_NULL)
+@JsonInclude(JsonInclude.Include.NON_NULL)
 @Getter
 @Builder
-public class GenericRequestBody   {
+public class DmiRequestBody {
     public enum OperationEnum {
         READ("read"),
         CREATE("create"),
@@ -52,4 +55,25 @@ public class GenericRequestBody   {
     private String dataType;
     private String data;
     private Map<String, String> cmHandleProperties;
+
+    /**
+     * Set CmHandleProperties by converting a list of PersistenceCmHandle.AdditionalProperty objects.
+     *
+     * @param cmHandlePropertiesAsList the cm handle additional properties
+     */
+    public void asCmHandleProperties(
+        final List<PersistenceCmHandle.AdditionalProperty> cmHandlePropertiesAsList) {
+        final boolean isCmHandlePropertiesNullOrEmpty =
+            cmHandlePropertiesAsList == null || cmHandlePropertiesAsList.isEmpty();
+        if (isCmHandlePropertiesNullOrEmpty) {
+            cmHandleProperties = Collections.emptyMap();
+        } else {
+            cmHandleProperties = new LinkedHashMap<>();
+            for (final PersistenceCmHandle.AdditionalProperty additionalProperty : cmHandlePropertiesAsList) {
+                cmHandleProperties.put(additionalProperty.getName(),
+                    additionalProperty.getValue());
+            }
+        }
+    }
+
 }
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/PersistenceCmHandleRetriever.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/PersistenceCmHandleRetriever.java
new file mode 100644
index 000000000..78b5c318d
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/PersistenceCmHandleRetriever.java
@@ -0,0 +1,89 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation
+ *  ================================================================================
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ncmp.api.impl.operations;
+
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import org.onap.cps.api.CpsDataService;
+import org.onap.cps.ncmp.api.models.CmHandle;
+import org.onap.cps.ncmp.api.models.PersistenceCmHandle;
+import org.onap.cps.spi.FetchDescendantsOption;
+import org.onap.cps.spi.model.DataNode;
+import org.springframework.stereotype.Component;
+
+/**
+ * Retrieves PersistenceCmHandles & properties.
+ */
+@Component
+public class PersistenceCmHandleRetriever {
+
+    private static final String NCMP_DATASPACE_NAME = "NCMP-Admin";
+    private static final String NCMP_DMI_REGISTRY_ANCHOR = "ncmp-dmi-registry";
+
+    private CpsDataService cpsDataService;
+
+    /**
+     * Constructor for PersistenceCmHandleRetriever.
+     * 
+     * @param cpsDataService the cps data service.
+     */
+    public PersistenceCmHandleRetriever(final CpsDataService cpsDataService) {
+        this.cpsDataService = cpsDataService;
+    }
+
+    /**
+     * This method retieves dmi service name and properties for a given cm handle.
+     * @param cmHandleId the id of the cm handle
+     * @return persistence cm handle
+     */
+    public PersistenceCmHandle retrieveCmHandleDmiServiceNameAndProperties(final String cmHandleId) {
+        final DataNode cmHandleDataNode = getCmHandleDataNode(cmHandleId);
+        final CmHandle cmHandle = new CmHandle(cmHandleId, getCmHandleProperties(cmHandleDataNode));
+        return PersistenceCmHandle.toPersistenceCmHandle(
+            String.valueOf(cmHandleDataNode.getLeaves().get("dmi-service-name")),
+            String.valueOf(cmHandleDataNode.getLeaves().get("dmi-data-service-name")),
+            String.valueOf(cmHandleDataNode.getLeaves().get("dmi-model-service-name")),
+            cmHandle
+        );
+    }
+
+    private DataNode getCmHandleDataNode(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 static Map<String, String> getCmHandleProperties(final DataNode cmHandleDataNode) {
+        if (cmHandleDataNode.getChildDataNodes().isEmpty()) {
+            return Collections.emptyMap();
+        }
+        final Map<String, String> cmHandlePropertiesAsMap = new LinkedHashMap<>();
+        for (final DataNode childDataNode: cmHandleDataNode.getChildDataNodes()) {
+            cmHandlePropertiesAsMap.put(String.valueOf(childDataNode.getLeaves().get("name")),
+                String.valueOf(childDataNode.getLeaves().get("value")));
+        }
+        return cmHandlePropertiesAsMap;
+    }
+
+}
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/RequiredDmiService.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/RequiredDmiService.java
new file mode 100644
index 000000000..7e39766f3
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/RequiredDmiService.java
@@ -0,0 +1,28 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation
+ *  ================================================================================
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ncmp.api.impl.operations;
+
+/**
+ * Enmm to determine if the required service is for a data or model operation.
+ */
+public enum RequiredDmiService {
+    DATA, MODEL
+}
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/CmHandle.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/CmHandle.java
index 84227ed6b..a38442b09 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/CmHandle.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/CmHandle.java
@@ -22,7 +22,9 @@ package org.onap.cps.ncmp.api.models;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import java.util.Map;
+import lombok.AllArgsConstructor;
 import lombok.Getter;
+import lombok.NoArgsConstructor;
 import lombok.Setter;
 import org.springframework.validation.annotation.Validated;
 
@@ -32,6 +34,8 @@ import org.springframework.validation.annotation.Validated;
 @Validated
 @Getter
 @Setter
+@AllArgsConstructor
+@NoArgsConstructor
 public class CmHandle {
 
     @JsonProperty("cmHandle")
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/DmiPluginRegistration.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/DmiPluginRegistration.java
index f5a0d7954..a604f3448 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/DmiPluginRegistration.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/DmiPluginRegistration.java
@@ -18,14 +18,17 @@
  *  ============LICENSE_END=========================================================
  */
 
-
 package org.onap.cps.ncmp.api.models;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonInclude.Include;
+import com.fasterxml.jackson.annotation.JsonSetter;
+import com.fasterxml.jackson.annotation.Nulls;
+import com.google.common.base.Strings;
 import java.util.List;
 import lombok.Getter;
 import lombok.Setter;
+import org.onap.cps.ncmp.api.impl.exception.NcmpException;
 
 /**
  * Dmi Registry request object.
@@ -35,12 +38,53 @@ import lombok.Setter;
 @JsonInclude(Include.NON_NULL)
 public class DmiPluginRegistration {
 
+    @JsonSetter(nulls = Nulls.AS_EMPTY)
     private String dmiPlugin;
 
+    @JsonSetter(nulls = Nulls.AS_EMPTY)
+    private String dmiDataPlugin;
+
+    @JsonSetter(nulls = Nulls.AS_EMPTY)
+    private String dmiModelPlugin;
+
     private List<CmHandle> createdCmHandles;
 
     private List<CmHandle> updatedCmHandles;
 
     private List<String> removedCmHandles;
 
+    public static final String PLEASE_SUPPLY_CORRECT_PLUGIN_INFORMATION = "Please supply correct plugin information.";
+
+    /**
+     * Validates plugin service names.
+     *
+     * @throws NcmpException if validation fails.
+     */
+    public void validateDmiPluginRegistration() throws NcmpException {
+        final String combinedServiceName = dmiPlugin;
+        final String dataServiceName = dmiDataPlugin;
+        final String modelsServiceName = dmiModelPlugin;
+
+        String errorMessage = null;
+
+        if (isNullEmptyOrBlank(combinedServiceName)
+            && isNullEmptyOrBlank(dataServiceName)
+            && isNullEmptyOrBlank(modelsServiceName)) {
+            errorMessage = "No DMI plugin service names";
+        }
+
+        if (!isNullEmptyOrBlank(combinedServiceName)
+            && (!isNullEmptyOrBlank(dataServiceName) || !isNullEmptyOrBlank(modelsServiceName))) {
+            errorMessage = "Invalid combination of plugin service names";
+        }
+
+        if (errorMessage != null) {
+            throw new NcmpException(errorMessage, PLEASE_SUPPLY_CORRECT_PLUGIN_INFORMATION);
+        }
+    }
+
+    private static boolean isNullEmptyOrBlank(final String serviceName) {
+        return Strings.isNullOrEmpty(serviceName) || serviceName.isBlank();
+    }
+
 }
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/PersistenceCmHandle.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/PersistenceCmHandle.java
index 88d97d25f..8b959e327 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/PersistenceCmHandle.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/PersistenceCmHandle.java
@@ -22,13 +22,17 @@
 package org.onap.cps.ncmp.api.models;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.base.Strings;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import lombok.AllArgsConstructor;
+import lombok.Data;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
+import org.onap.cps.ncmp.api.impl.operations.RequiredDmiService;
 
 /**
  * DmiRegistry.
@@ -43,22 +47,72 @@ public class PersistenceCmHandle {
     @JsonProperty("dmi-service-name")
     private String dmiServiceName;
 
+    @JsonProperty("dmi-data-service-name")
+    private String dmiDataServiceName;
+
+    @JsonProperty("dmi-model-service-name")
+    private String dmiModelServiceName;
+
     @JsonProperty("additional-properties")
     private List<AdditionalProperty> additionalProperties;
 
     /**
+     * Create a persistenceCmHandle.
+     * @param dmiServiceName dmi service name
+     * @param dmiDataServiceName dmi data service name
+     * @param dmiModelServiceName dmi model service name
+     * @param cmHandle the cm handle
+     * @return instance of persistenceCmHandle
+     */
+    public static PersistenceCmHandle toPersistenceCmHandle(final String dmiServiceName,
+                                                            final String dmiDataServiceName,
+                                                            final String dmiModelServiceName,
+                                                            final CmHandle cmHandle) {
+        final PersistenceCmHandle persistenceCmHandle = new PersistenceCmHandle();
+        persistenceCmHandle.setId(cmHandle.getCmHandleID());
+        persistenceCmHandle.setDmiServiceName(dmiServiceName);
+        persistenceCmHandle.setDmiDataServiceName(dmiDataServiceName);
+        persistenceCmHandle.setDmiModelServiceName(dmiModelServiceName);
+        if (cmHandle.getCmHandleProperties() == null) {
+            persistenceCmHandle.asAdditionalProperties(Collections.emptyMap());
+        } else {
+            persistenceCmHandle.asAdditionalProperties(cmHandle.getCmHandleProperties());
+        }
+        return persistenceCmHandle;
+    }
+
+    /**
      * Set Additional Properties map, key and value pair.
      * @param additionalPropertiesAsMap Map of Additional Properties
      */
-    public void setAdditionalProperties(final Map<String, String> additionalPropertiesAsMap) {
+    public void asAdditionalProperties(final Map<String, String> additionalPropertiesAsMap) {
         additionalProperties = new ArrayList<>(additionalPropertiesAsMap.size());
         for (final Map.Entry<String, String> entry : additionalPropertiesAsMap.entrySet()) {
             additionalProperties.add(new AdditionalProperty(entry.getKey(), entry.getValue()));
         }
     }
 
+    /**
+     * Resolve a dmi service name.
+     * @param requiredService indicates what typo of service is required
+     * @return dmi service name
+     */
+    public String resolveDmiServiceName(final RequiredDmiService requiredService) {
+        if (isNullEmptyOrBlank(dmiServiceName)) {
+            if (RequiredDmiService.DATA.equals(requiredService)) {
+                return dmiDataServiceName;
+            }
+            return dmiModelServiceName;
+        }
+        return dmiServiceName;
+    }
+
+    private static boolean isNullEmptyOrBlank(final String serviceName) {
+        return Strings.isNullOrEmpty(serviceName) || serviceName.isBlank();
+    }
+
     @AllArgsConstructor
-    @Getter
+    @Data
     public static class AdditionalProperty {
 
         @JsonProperty()
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/PersistenceCmHandlesList.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/PersistenceCmHandlesList.java
index f35abf60b..d4f6e952d 100644
--- a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/PersistenceCmHandlesList.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/models/PersistenceCmHandlesList.java
@@ -22,6 +22,7 @@ package org.onap.cps.ncmp.api.models;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 import lombok.Getter;
 
@@ -32,6 +33,31 @@ public class PersistenceCmHandlesList {
     private List<PersistenceCmHandle> persistenceCmHandles = new ArrayList<>();
 
     /**
+     * Create a PersistenceCmHandleList given all service names and a collection of cmHandles.
+     * @param dmiServiceName the dmi service name
+     * @param dmiDataServiceName the dmi data service name
+     * @param dmiModelServiceName the dmi model service name
+     * @param cmHandles cm handles
+     * @return instance of PersistenceCmHandleList
+     */
+    public static PersistenceCmHandlesList toPersistenceCmHandlesList(final String dmiServiceName,
+                                                                      final String dmiDataServiceName,
+                                                                      final String dmiModelServiceName,
+                                                                      final Collection<CmHandle> cmHandles) {
+        final PersistenceCmHandlesList persistenceCmHandlesList = new PersistenceCmHandlesList();
+        for (final CmHandle cmHandle : cmHandles) {
+            final PersistenceCmHandle persistenceCmHandle =
+                PersistenceCmHandle.toPersistenceCmHandle(
+                    dmiServiceName,
+                    dmiDataServiceName,
+                    dmiModelServiceName,
+                    cmHandle);
+            persistenceCmHandlesList.add(persistenceCmHandle);
+        }
+        return persistenceCmHandlesList;
+    }
+
+    /**
      * Add a persistenceCmHandle.
      *
      * @param persistenceCmHandle the persistenceCmHandle to add