Refactor and Move NCMP Data Request Handlers

- Simplified NCMP Rest Request Handlers
- Moved responsEntity wrapping to Controller so most handler methods can have clear return types
- Moved NCMP Rest Request Handlers  to Service Layer
- Moved related exceptions and utils to Service Layer
- Used Lombok for constructors
- Improved related testware

Issue-ID: CPS-2266
Change-Id: I0025fab1c92e0d613825093b6e4b43dae044c01a
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>

13 files changed, 126 insertions, 157 deletions

diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/NetworkCmProxyController.java b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/NetworkCmProxyController.java
index 5b54ac243e..58d6ce7108 100755
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/NetworkCmProxyController.java
+++ b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/NetworkCmProxyController.java
@@ -39,6 +39,9 @@ import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.onap.cps.ncmp.api.NetworkCmProxyDataService;
+import org.onap.cps.ncmp.api.impl.NcmpCachedResourceRequestHandler;
+import org.onap.cps.ncmp.api.impl.NcmpDatastoreRequestHandler;
+import org.onap.cps.ncmp.api.impl.NcmpPassthroughResourceRequestHandler;
 import org.onap.cps.ncmp.api.impl.config.embeddedcache.TrustLevelCacheConfig;
 import org.onap.cps.ncmp.api.impl.exception.InvalidDatastoreException;
 import org.onap.cps.ncmp.api.impl.inventory.CompositeState;
@@ -48,9 +51,6 @@ import org.onap.cps.ncmp.api.models.CmHandleQueryApiParameters;
 import org.onap.cps.ncmp.api.models.CmResourceAddress;
 import org.onap.cps.ncmp.api.models.NcmpServiceCmHandle;
 import org.onap.cps.ncmp.rest.api.NetworkCmProxyApi;
-import org.onap.cps.ncmp.rest.controller.handlers.NcmpCachedResourceRequestHandler;
-import org.onap.cps.ncmp.rest.controller.handlers.NcmpDatastoreRequestHandler;
-import org.onap.cps.ncmp.rest.controller.handlers.NcmpPassthroughResourceRequestHandler;
 import org.onap.cps.ncmp.rest.mapper.CmHandleStateMapper;
 import org.onap.cps.ncmp.rest.mapper.DataOperationRequestMapper;
 import org.onap.cps.ncmp.rest.model.CmHandlePublicProperties;
@@ -62,6 +62,7 @@ import org.onap.cps.ncmp.rest.model.RestOutputCmHandle;
 import org.onap.cps.ncmp.rest.model.RestOutputCmHandleCompositeState;
 import org.onap.cps.ncmp.rest.model.RestOutputCmHandlePublicProperties;
 import org.onap.cps.ncmp.rest.util.DeprecationHelper;
+import org.onap.cps.spi.model.DataNode;
 import org.onap.cps.spi.model.ModuleDefinition;
 import org.onap.cps.utils.JsonObjectMapper;
 import org.springframework.beans.factory.annotation.Qualifier;
@@ -112,16 +113,18 @@ public class NetworkCmProxyController implements NetworkCmProxyApi {
                                                              final String authorization) {
         final NcmpDatastoreRequestHandler ncmpDatastoreRequestHandler = getNcmpDatastoreRequestHandler(datastoreName);
         final CmResourceAddress cmResourceAddress = new CmResourceAddress(datastoreName, cmHandle, resourceIdentifier);
-        return ncmpDatastoreRequestHandler.executeRequest(cmResourceAddress, optionsParamInQuery, topicParamInQuery,
-            includeDescendants, authorization);
+        final Object result = ncmpDatastoreRequestHandler.executeRequest(cmResourceAddress, optionsParamInQuery,
+            topicParamInQuery, includeDescendants, authorization);
+        return ResponseEntity.ok(result);
     }
 
     @Override
     public ResponseEntity<Object> executeDataOperationForCmHandles(final String topicParamInQuery,
                                                                    final DataOperationRequest dataOperationRequest,
                                                                    final String authorization) {
-        return ncmpPassthroughResourceRequestHandler.executeRequest(topicParamInQuery,
+        final Object result = ncmpPassthroughResourceRequestHandler.executeRequest(topicParamInQuery,
                 dataOperationRequestMapper.toDataOperationRequest(dataOperationRequest), authorization);
+        return ResponseEntity.ok(result);
     }
 
     /**
@@ -133,7 +136,7 @@ public class NetworkCmProxyController implements NetworkCmProxyApi {
      * @param optionsParamInQuery  options query parameter
      * @param topicParamInQuery    topic query parameter
      * @param includeDescendants   whether to include descendants or not
-     * @return {@code ResponseEntity} response from dmi plugin
+     * @return {@code ResponseEntity} response. Body contains a collection of DataNodes
      */
 
     @Override
@@ -144,7 +147,9 @@ public class NetworkCmProxyController implements NetworkCmProxyApi {
                                                                final String topicParamInQuery,
                                                                final Boolean includeDescendants) {
         validateDataStore(OPERATIONAL, datastoreName);
-        return ncmpCachedResourceRequestHandler.executeRequest(cmHandle, cpsPath, includeDescendants);
+        final Collection<DataNode> dataNodes = ncmpCachedResourceRequestHandler.executeRequest(cmHandle, cpsPath,
+            includeDescendants);
+        return ResponseEntity.ok(dataNodes);
     }
 
     /**
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandler.java b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandler.java
index 7263000896..ba39178c7b 100755
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandler.java
+++ b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandler.java
@@ -29,6 +29,9 @@ import org.onap.cps.ncmp.api.impl.exception.InvalidDatastoreException;
 import org.onap.cps.ncmp.api.impl.exception.InvalidDmiResourceUrlException;
 import org.onap.cps.ncmp.api.impl.exception.NcmpException;
 import org.onap.cps.ncmp.api.impl.exception.ServerNcmpException;
+import org.onap.cps.ncmp.exceptions.InvalidTopicException;
+import org.onap.cps.ncmp.exceptions.OperationNotSupportedException;
+import org.onap.cps.ncmp.exceptions.PayloadTooLargeException;
 import org.onap.cps.ncmp.rest.controller.NetworkCmProxyController;
 import org.onap.cps.ncmp.rest.controller.NetworkCmProxyInventoryController;
 import org.onap.cps.ncmp.rest.model.DmiErrorMessage;
diff --git a/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/controller/NetworkCmProxyControllerSpec.groovy b/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/controller/NetworkCmProxyControllerSpec.groovy
index 3a5748f002..34b9dbe950 100644
--- a/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/controller/NetworkCmProxyControllerSpec.groovy
+++ b/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/controller/NetworkCmProxyControllerSpec.groovy
@@ -23,42 +23,26 @@
 
 package org.onap.cps.ncmp.rest.controller
 
-import static org.onap.cps.ncmp.api.impl.inventory.CompositeState.DataStores
-import static org.onap.cps.ncmp.api.impl.inventory.CompositeState.Operational
-import static org.onap.cps.ncmp.api.impl.operations.DatastoreType.OPERATIONAL
-import static org.onap.cps.ncmp.api.impl.operations.DatastoreType.PASSTHROUGH_OPERATIONAL
-import static org.onap.cps.ncmp.api.impl.operations.DatastoreType.PASSTHROUGH_RUNNING
-import static org.onap.cps.ncmp.api.impl.operations.OperationType.CREATE
-import static org.onap.cps.ncmp.api.impl.operations.OperationType.DELETE
-import static org.onap.cps.ncmp.api.impl.operations.OperationType.PATCH
-import static org.onap.cps.ncmp.api.impl.operations.OperationType.UPDATE
-import static org.onap.cps.spi.FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS
-import static org.onap.cps.spi.FetchDescendantsOption.OMIT_DESCENDANTS
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.delete
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.patch
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.put
-
 import ch.qos.logback.classic.Level
 import ch.qos.logback.classic.Logger
 import ch.qos.logback.classic.spi.ILoggingEvent
 import ch.qos.logback.core.read.ListAppender
 import com.fasterxml.jackson.databind.ObjectMapper
+import groovy.json.JsonSlurper
 import org.mapstruct.factory.Mappers
 import org.onap.cps.TestUtils
 import org.onap.cps.events.EventsPublisher
 import org.onap.cps.ncmp.api.NetworkCmProxyDataService
 import org.onap.cps.ncmp.api.NetworkCmProxyQueryService
+import org.onap.cps.ncmp.api.impl.NcmpCachedResourceRequestHandler
+import org.onap.cps.ncmp.api.impl.NcmpPassthroughResourceRequestHandler
 import org.onap.cps.ncmp.api.impl.inventory.CmHandleState
 import org.onap.cps.ncmp.api.impl.inventory.CompositeState
 import org.onap.cps.ncmp.api.impl.inventory.DataStoreSyncState
 import org.onap.cps.ncmp.api.impl.inventory.LockReasonCategory
 import org.onap.cps.ncmp.api.impl.trustlevel.TrustLevel
-import org.onap.cps.ncmp.api.models.NcmpServiceCmHandle
 import org.onap.cps.ncmp.api.models.CmResourceAddress
-import org.onap.cps.ncmp.rest.controller.handlers.NcmpCachedResourceRequestHandler
-import org.onap.cps.ncmp.rest.controller.handlers.NcmpPassthroughResourceRequestHandler
+import org.onap.cps.ncmp.api.models.NcmpServiceCmHandle
 import org.onap.cps.ncmp.rest.mapper.CmHandleStateMapper
 import org.onap.cps.ncmp.rest.mapper.DataOperationRequestMapper
 import org.onap.cps.ncmp.rest.model.DataOperationDefinition
@@ -75,15 +59,32 @@ import org.springframework.beans.factory.annotation.Value
 import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest
 import org.springframework.http.HttpStatus
 import org.springframework.http.MediaType
+import org.springframework.http.ResponseEntity
 import org.springframework.test.web.servlet.MockMvc
+import reactor.core.publisher.Mono
 import spock.lang.Shared
 import spock.lang.Specification
+
 import java.time.OffsetDateTime
 import java.time.ZoneOffset
 import java.time.format.DateTimeFormatter
-import groovy.json.JsonSlurper
-import org.springframework.http.ResponseEntity
-import reactor.core.publisher.Mono
+
+import static org.onap.cps.ncmp.api.impl.inventory.CompositeState.DataStores
+import static org.onap.cps.ncmp.api.impl.inventory.CompositeState.Operational
+import static org.onap.cps.ncmp.api.impl.operations.DatastoreType.OPERATIONAL
+import static org.onap.cps.ncmp.api.impl.operations.DatastoreType.PASSTHROUGH_OPERATIONAL
+import static org.onap.cps.ncmp.api.impl.operations.DatastoreType.PASSTHROUGH_RUNNING
+import static org.onap.cps.ncmp.api.impl.operations.OperationType.CREATE
+import static org.onap.cps.ncmp.api.impl.operations.OperationType.DELETE
+import static org.onap.cps.ncmp.api.impl.operations.OperationType.PATCH
+import static org.onap.cps.ncmp.api.impl.operations.OperationType.UPDATE
+import static org.onap.cps.spi.FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS
+import static org.onap.cps.spi.FetchDescendantsOption.OMIT_DESCENDANTS
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.delete
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.patch
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.put
 
 @WebMvcTest(NetworkCmProxyController)
 class NetworkCmProxyControllerSpec extends Specification {
diff --git a/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandlerSpec.groovy b/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandlerSpec.groovy
index 33eb48ffa2..af8a8ea12a 100644
--- a/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandlerSpec.groovy
+++ b/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandlerSpec.groovy
@@ -21,28 +21,17 @@
 
 package org.onap.cps.ncmp.rest.exceptions
 
-import static org.springframework.http.HttpStatus.BAD_GATEWAY
-import static org.springframework.http.HttpStatus.BAD_REQUEST
-import static org.springframework.http.HttpStatus.CONFLICT
-import static org.springframework.http.HttpStatus.INTERNAL_SERVER_ERROR
-import static org.springframework.http.HttpStatus.NOT_FOUND
-import static org.springframework.http.HttpStatus.PAYLOAD_TOO_LARGE
-import static org.onap.cps.ncmp.rest.exceptions.NetworkCmProxyRestExceptionHandlerSpec.ApiType.NCMP
-import static org.onap.cps.ncmp.rest.exceptions.NetworkCmProxyRestExceptionHandlerSpec.ApiType.NCMPINVENTORY
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post
-import static org.onap.cps.ncmp.api.NcmpResponseStatus.UNABLE_TO_READ_RESOURCE_DATA
-
 import groovy.json.JsonSlurper
 import org.mapstruct.factory.Mappers
 import org.onap.cps.TestUtils
 import org.onap.cps.ncmp.api.NetworkCmProxyDataService
-import org.onap.cps.ncmp.api.impl.exception.DmiRequestException
+import org.onap.cps.ncmp.api.impl.NcmpCachedResourceRequestHandler
+import org.onap.cps.ncmp.api.impl.NcmpPassthroughResourceRequestHandler
 import org.onap.cps.ncmp.api.impl.exception.DmiClientRequestException
+import org.onap.cps.ncmp.api.impl.exception.DmiRequestException
 import org.onap.cps.ncmp.api.impl.exception.ServerNcmpException
+import org.onap.cps.ncmp.exceptions.PayloadTooLargeException
 import org.onap.cps.ncmp.rest.controller.NcmpRestInputMapper
-import org.onap.cps.ncmp.rest.controller.handlers.NcmpCachedResourceRequestHandler
-import org.onap.cps.ncmp.rest.controller.handlers.NcmpPassthroughResourceRequestHandler
 import org.onap.cps.ncmp.rest.mapper.CmHandleStateMapper
 import org.onap.cps.ncmp.rest.mapper.DataOperationRequestMapper
 import org.onap.cps.ncmp.rest.util.DeprecationHelper
@@ -60,6 +49,18 @@ import org.springframework.test.web.servlet.MockMvc
 import spock.lang.Shared
 import spock.lang.Specification
 
+import static org.onap.cps.ncmp.api.NcmpResponseStatus.UNABLE_TO_READ_RESOURCE_DATA
+import static org.onap.cps.ncmp.rest.exceptions.NetworkCmProxyRestExceptionHandlerSpec.ApiType.NCMP
+import static org.onap.cps.ncmp.rest.exceptions.NetworkCmProxyRestExceptionHandlerSpec.ApiType.NCMPINVENTORY
+import static org.springframework.http.HttpStatus.BAD_GATEWAY
+import static org.springframework.http.HttpStatus.BAD_REQUEST
+import static org.springframework.http.HttpStatus.CONFLICT
+import static org.springframework.http.HttpStatus.INTERNAL_SERVER_ERROR
+import static org.springframework.http.HttpStatus.NOT_FOUND
+import static org.springframework.http.HttpStatus.PAYLOAD_TOO_LARGE
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post
+
 @WebMvcTest
 class NetworkCmProxyRestExceptionHandlerSpec extends Specification {
 
@@ -125,7 +126,7 @@ class NetworkCmProxyRestExceptionHandlerSpec extends Specification {
             'Data Node Not Found' | new DataNodeNotFoundException('myDataspaceName', 'myAnchorName') || NOT_FOUND             | 'DataNode not found'        | 'DataNode not found'
             'Existing entry'      | new AlreadyDefinedException('name',null)                         || CONFLICT              | 'Already defined exception' | 'name already exists'
             'Existing entries'    | AlreadyDefinedException.forDataNodes(['A', 'B'], 'myAnchorName') || CONFLICT              | 'Already defined exception' | '2 data node(s) already exist'
-            'Operation too large' | new PayloadTooLargeException(sampleErrorMessage)                 || PAYLOAD_TOO_LARGE     | sampleErrorMessage          | 'Check logs'
+            'Operation too large' | new PayloadTooLargeException(sampleErrorMessage) || PAYLOAD_TOO_LARGE | sampleErrorMessage | 'Check logs'
     }
 
     def 'Post request with exception returns correct HTTP Status.'() {
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpCachedResourceRequestHandler.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/NcmpCachedResourceRequestHandler.java
index 80e1c442e9..eb43718f02 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpCachedResourceRequestHandler.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/NcmpCachedResourceRequestHandler.java
@@ -18,50 +18,39 @@
  *  ============LICENSE_END=========================================================
  */
 
-package org.onap.cps.ncmp.rest.controller.handlers;
+package org.onap.cps.ncmp.api.impl;
 
 import java.util.Collection;
+import lombok.RequiredArgsConstructor;
 import org.onap.cps.ncmp.api.NetworkCmProxyDataService;
 import org.onap.cps.ncmp.api.NetworkCmProxyQueryService;
 import org.onap.cps.ncmp.api.models.CmResourceAddress;
 import org.onap.cps.spi.FetchDescendantsOption;
 import org.onap.cps.spi.model.DataNode;
-import org.springframework.http.ResponseEntity;
-import org.springframework.stereotype.Component;
+import org.springframework.stereotype.Service;
 import reactor.core.publisher.Mono;
 
-@Component
+@Service
+@RequiredArgsConstructor
 public class NcmpCachedResourceRequestHandler extends NcmpDatastoreRequestHandler {
 
     private final NetworkCmProxyDataService networkCmProxyDataService;
     private final NetworkCmProxyQueryService networkCmProxyQueryService;
 
     /**
-     * Constructor.
-     *
-     * @param networkCmProxyDataService  @see org.onap.cps.ncmp.api.NetworkCmProxyDataService
-     * @param networkCmProxyQueryService @see org.onap.cps.ncmp.api.NetworkCmProxyQueryService
-     */
-    public NcmpCachedResourceRequestHandler(final NetworkCmProxyDataService networkCmProxyDataService,
-                                            final NetworkCmProxyQueryService networkCmProxyQueryService) {
-        this.networkCmProxyDataService = networkCmProxyDataService;
-        this.networkCmProxyQueryService = networkCmProxyQueryService;
-    }
-
-    /**
      * Executes a synchronous query request for given cm handle.
      * Note. Currently only ncmp-datastore:operational supports query operations.
      *
      * @param cmHandleId         the cm handle
      * @param resourceIdentifier the resource identifier
      * @param includeDescendants whether include descendants
-     * @return the response entity
+     * @return a collection of data nodes
      */
-    public ResponseEntity<Object> executeRequest(final String cmHandleId, final String resourceIdentifier,
+    public Collection<DataNode> executeRequest(final String cmHandleId, final String resourceIdentifier,
                                                  final boolean includeDescendants) {
-        final Collection<DataNode> dataNodes = getTaskSupplierForQueryRequest(cmHandleId, resourceIdentifier,
-                includeDescendants);
-        return ResponseEntity.ok(dataNodes);
+        final FetchDescendantsOption fetchDescendantsOption = getFetchDescendantsOption(includeDescendants);
+        return networkCmProxyQueryService.queryResourceDataOperational(cmHandleId, resourceIdentifier,
+            fetchDescendantsOption);
     }
 
     @Override
@@ -76,14 +65,6 @@ public class NcmpCachedResourceRequestHandler extends NcmpDatastoreRequestHandle
                 () -> networkCmProxyDataService.getResourceDataForCmHandle(cmResourceAddress, fetchDescendantsOption));
     }
 
-    private Collection<DataNode> getTaskSupplierForQueryRequest(final String cmHandleId,
-                                                                final String resourceIdentifier,
-                                                                final boolean includeDescendants) {
-        final FetchDescendantsOption fetchDescendantsOption = getFetchDescendantsOption(includeDescendants);
-        return networkCmProxyQueryService.queryResourceDataOperational(cmHandleId, resourceIdentifier,
-            fetchDescendantsOption);
-    }
-
     private static FetchDescendantsOption getFetchDescendantsOption(final boolean includeDescendants) {
         return includeDescendants ? FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS
             : FetchDescendantsOption.OMIT_DESCENDANTS;
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreRequestHandler.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/NcmpDatastoreRequestHandler.java
index 20059e20f4..dbd2bb4938 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreRequestHandler.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/NcmpDatastoreRequestHandler.java
@@ -18,22 +18,19 @@
  *  ============LICENSE_END=========================================================
  */
 
-package org.onap.cps.ncmp.rest.controller.handlers;
+package org.onap.cps.ncmp.api.impl;
 
 import java.util.Map;
 import java.util.UUID;
-import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.onap.cps.ncmp.api.models.CmResourceAddress;
-import org.onap.cps.ncmp.rest.util.TopicValidator;
+import org.onap.cps.ncmp.utils.TopicValidator;
 import org.springframework.beans.factory.annotation.Value;
-import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
 import reactor.core.publisher.Mono;
 
 @Slf4j
 @Service
-@RequiredArgsConstructor
 public abstract class NcmpDatastoreRequestHandler {
 
     private static final String NO_REQUEST_ID = null;
@@ -52,9 +49,10 @@ public abstract class NcmpDatastoreRequestHandler {
      * @param topicParamInQuery   the topic param in query
      * @param includeDescendants  whether include descendants
      * @param authorization       contents of Authorization header, or null if not present
-     * @return the response entity
+     * @return the result object, depends on use op topic. With topic a map object with request id is returned
+     *         otherwise the result of the request.
      */
-    public ResponseEntity<Object> executeRequest(final CmResourceAddress cmResourceAddress,
+    public Object executeRequest(final CmResourceAddress cmResourceAddress,
                                                  final String optionsParamInQuery,
                                                  final String topicParamInQuery,
                                                  final boolean includeDescendants,
@@ -72,14 +70,10 @@ public abstract class NcmpDatastoreRequestHandler {
         }
         final Mono<Object> resourceDataMono = getResourceDataForCmHandle(cmResourceAddress, optionsParamInQuery,
                 NO_TOPIC, NO_REQUEST_ID, includeDescendants, authorization);
-        return fetchResourceDataSynchronously(resourceDataMono);
+        return resourceDataMono.block();
     }
 
-    private ResponseEntity<Object> fetchResourceDataSynchronously(final Mono<Object> resourceDataMono) {
-        return ResponseEntity.ok(resourceDataMono.block());
-    }
-
-    private ResponseEntity<Object> fetchResourceDataAsynchronously(final CmResourceAddress cmResourceAddress,
+    private Map<String, String> fetchResourceDataAsynchronously(final CmResourceAddress cmResourceAddress,
                                                                    final String optionsParamInQuery,
                                                                    final String topicParamInQuery,
                                                                    final boolean includeDescendants,
@@ -93,7 +87,7 @@ public abstract class NcmpDatastoreRequestHandler {
                         log.error("Async operation failed for request id {}: {}", requestId, error.getMessage()))
                 .subscribe();
         log.debug("Received Async request with id {}", requestId);
-        return ResponseEntity.ok(Map.of("requestId", requestId));
+        return Map.of("requestId", requestId);
     }
 
     protected abstract Mono<Object> getResourceDataForCmHandle(final CmResourceAddress cmResourceAddress,
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpPassthroughResourceRequestHandler.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/NcmpPassthroughResourceRequestHandler.java
index 53e374d30a..90d9a23d6d 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpPassthroughResourceRequestHandler.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/NcmpPassthroughResourceRequestHandler.java
@@ -18,27 +18,28 @@
  *  ============LICENSE_END=========================================================
  */
 
-package org.onap.cps.ncmp.rest.controller.handlers;
+package org.onap.cps.ncmp.api.impl;
 
 import static org.onap.cps.ncmp.api.impl.operations.DatastoreType.OPERATIONAL;
 import static org.onap.cps.ncmp.api.impl.operations.OperationType.READ;
 
 import java.util.Map;
 import java.util.UUID;
+import lombok.RequiredArgsConstructor;
 import org.onap.cps.ncmp.api.NetworkCmProxyDataService;
 import org.onap.cps.ncmp.api.impl.exception.InvalidDatastoreException;
 import org.onap.cps.ncmp.api.impl.operations.DatastoreType;
 import org.onap.cps.ncmp.api.impl.operations.OperationType;
 import org.onap.cps.ncmp.api.models.CmResourceAddress;
 import org.onap.cps.ncmp.api.models.DataOperationRequest;
-import org.onap.cps.ncmp.rest.exceptions.OperationNotSupportedException;
-import org.onap.cps.ncmp.rest.exceptions.PayloadTooLargeException;
-import org.onap.cps.ncmp.rest.util.TopicValidator;
-import org.springframework.http.ResponseEntity;
+import org.onap.cps.ncmp.exceptions.OperationNotSupportedException;
+import org.onap.cps.ncmp.exceptions.PayloadTooLargeException;
+import org.onap.cps.ncmp.utils.TopicValidator;
 import org.springframework.stereotype.Service;
 import reactor.core.publisher.Mono;
 
 @Service
+@RequiredArgsConstructor
 public class NcmpPassthroughResourceRequestHandler extends NcmpDatastoreRequestHandler {
 
     private final NetworkCmProxyDataService networkCmProxyDataService;
@@ -46,32 +47,26 @@ public class NcmpPassthroughResourceRequestHandler extends NcmpDatastoreRequestH
     private static final String PAYLOAD_TOO_LARGE_TEMPLATE = "Operation '%s' affects too many (%d) cm handles";
 
     /**
-     * Constructor.
-     *
-     * @param networkCmProxyDataService  @see org.onap.cps.ncmp.api.NetworkCmProxyDataService
-     */
-    public NcmpPassthroughResourceRequestHandler(final NetworkCmProxyDataService networkCmProxyDataService) {
-        this.networkCmProxyDataService = networkCmProxyDataService;
-    }
-
-    /**
      * Executes asynchronous request for group of cm handles to resource data.
      *
      * @param topicParamInQuery        the topic param in query
      * @param dataOperationRequest     data operation request details for resource data
      * @param authorization            contents of Authorization header, or null if not present
-     * @return the response entity
+     * @return a map with one entry of request Id for success or status and error when async feature is disabled
      */
-    public ResponseEntity<Object> executeRequest(final String topicParamInQuery,
-                                                 final DataOperationRequest dataOperationRequest,
-                                                 final String authorization) {
+    public Map<String, String> executeRequest(final String topicParamInQuery,
+                                              final DataOperationRequest dataOperationRequest,
+                                              final String authorization) {
         validateDataOperationRequest(topicParamInQuery, dataOperationRequest);
         if (!notificationFeatureEnabled) {
-            return ResponseEntity.ok(Map.of("status",
-                "Asynchronous request is unavailable as notification feature is currently disabled."));
+            return Map.of("status",
+                "Asynchronous request is unavailable as notification feature is currently disabled.");
         }
-        return getRequestIdAndSendDataOperationRequestToDmiService(topicParamInQuery, dataOperationRequest,
-                authorization);
+        final String requestId = UUID.randomUUID().toString();
+        networkCmProxyDataService.executeDataOperationForCmHandles(topicParamInQuery, dataOperationRequest, requestId,
+            authorization);
+        return Map.of("requestId", requestId);
+
     }
 
     @Override
@@ -85,16 +80,6 @@ public class NcmpPassthroughResourceRequestHandler extends NcmpDatastoreRequestH
                 topicParamInQuery, requestId, authorization);
     }
 
-    private ResponseEntity<Object> getRequestIdAndSendDataOperationRequestToDmiService(
-            final String topicParamInQuery,
-            final DataOperationRequest dataOperationRequest,
-            final String authorization) {
-        final String requestId = UUID.randomUUID().toString();
-        networkCmProxyDataService.executeDataOperationForCmHandles(topicParamInQuery, dataOperationRequest, requestId,
-                authorization);
-        return ResponseEntity.ok(Map.of("requestId", requestId));
-    }
-
     private void validateDataOperationRequest(final String topicParamInQuery,
                                               final DataOperationRequest dataOperationRequest) {
         TopicValidator.validateTopicName(topicParamInQuery);
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/InvalidTopicException.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/exceptions/InvalidTopicException.java
index 6a52d5861e..fcf2a28ccc 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/InvalidTopicException.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/exceptions/InvalidTopicException.java
@@ -18,7 +18,7 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.cps.ncmp.rest.exceptions;
+package org.onap.cps.ncmp.exceptions;
 
 import lombok.Getter;
 
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/OperationNotSupportedException.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/exceptions/OperationNotSupportedException.java
index e1daf3df6f..d75c0bd47a 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/OperationNotSupportedException.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/exceptions/OperationNotSupportedException.java
@@ -18,7 +18,7 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.cps.ncmp.rest.exceptions;
+package org.onap.cps.ncmp.exceptions;
 
 public class OperationNotSupportedException extends RuntimeException {
     /**
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/PayloadTooLargeException.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/exceptions/PayloadTooLargeException.java
index cddbd08379..dc7057af79 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/PayloadTooLargeException.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/exceptions/PayloadTooLargeException.java
@@ -18,7 +18,7 @@
  * ============LICENSE_END=========================================================
  */
 
-package org.onap.cps.ncmp.rest.exceptions;
+package org.onap.cps.ncmp.exceptions;
 
 public class PayloadTooLargeException extends RuntimeException {
 
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/util/TopicValidator.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/utils/TopicValidator.java
index 6a46fbd638..f9fed8d437 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/util/TopicValidator.java
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/utils/TopicValidator.java
@@ -18,12 +18,12 @@
  *  ============LICENSE_END=========================================================
  */
 
-package org.onap.cps.ncmp.rest.util;
+package org.onap.cps.ncmp.utils;
 
 import java.util.regex.Pattern;
 import lombok.AccessLevel;
 import lombok.NoArgsConstructor;
-import org.onap.cps.ncmp.rest.exceptions.InvalidTopicException;
+import org.onap.cps.ncmp.exceptions.InvalidTopicException;
 
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
 public class TopicValidator {
diff --git a/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreRequestHandlerSpec.groovy b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/NcmpDatastoreRequestHandlerSpec.groovy
index 00b0cb04c5..b73f9a46d4 100644
--- a/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreRequestHandlerSpec.groovy
+++ b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/NcmpDatastoreRequestHandlerSpec.groovy
@@ -18,20 +18,20 @@
  *  ============LICENSE_END=========================================================
  */
 
-package org.onap.cps.ncmp.rest.controller.handlers
+package org.onap.cps.ncmp.api.impl
 
 import org.onap.cps.ncmp.api.NetworkCmProxyDataService
 import org.onap.cps.ncmp.api.impl.exception.InvalidDatastoreException
 import org.onap.cps.ncmp.api.impl.exception.InvalidOperationException
+import org.onap.cps.ncmp.api.models.CmResourceAddress
 import org.onap.cps.ncmp.api.models.DataOperationDefinition
 import org.onap.cps.ncmp.api.models.DataOperationRequest
-import org.onap.cps.ncmp.api.models.CmResourceAddress
-import org.onap.cps.ncmp.rest.exceptions.OperationNotSupportedException
-import org.onap.cps.ncmp.rest.exceptions.PayloadTooLargeException
+import org.onap.cps.ncmp.exceptions.OperationNotSupportedException
+import org.onap.cps.ncmp.exceptions.PayloadTooLargeException
 import org.springframework.http.HttpStatus
+import org.springframework.http.ResponseEntity
 import reactor.core.publisher.Mono
 import spock.lang.Specification
-import spock.util.concurrent.PollingConditions
 
 class NcmpDatastoreRequestHandlerSpec extends Specification {
 
@@ -50,19 +50,26 @@ class NcmpDatastoreRequestHandlerSpec extends Specification {
             objectUnderTest.notificationFeatureEnabled = notificationFeatureEnabled
         and: 'a CM resource address'
             def cmResourceAddress = new CmResourceAddress('ds', 'ch1', 'resource1')
-        and: 'the (mocked) service is called with the correct parameters returns OK'
-            1 * mockNetworkCmProxyDataService.getResourceDataForCmHandle(cmResourceAddress, 'options', _, _, NO_AUTH_HEADER) >> Mono.just(HttpStatus.OK)
+        and: 'the (mocked) service when called with the correct parameters returns a response from dmi'
+            def resultFromDmi = new ResponseEntity('response from dmi',HttpStatus.I_AM_A_TEAPOT)
+            def synchronousResult = Mono.justOrEmpty(resultFromDmi)
+            mockNetworkCmProxyDataService.getResourceDataForCmHandle(cmResourceAddress, 'options', _, _, NO_AUTH_HEADER) >> synchronousResult
         when: 'get request is executed with topic = #topic'
-            def response= objectUnderTest.executeRequest(cmResourceAddress, 'options', topic, false, NO_AUTH_HEADER)
-        then: 'a successful response with/without request id is returned'
-            assert response.statusCode.value == 200
-            assert response.body instanceof Map == expectedResponseBodyIsMap
+            def response = objectUnderTest.executeRequest(cmResourceAddress, 'options', topic, false, NO_AUTH_HEADER)
+        then: 'a successful result with/without request id is returned'
+            if (expectSynchronousResponse) {
+                assert response.toString().contains('response from dmi')
+                assert response.toString().contains("I'm a teapot")
+            } else {
+                // expect request id in a map
+                assert response.keySet()[0] == 'requestId'
+            }
         where: 'the following parameters are used'
-            scenario                   | notificationFeatureEnabled | topic   || expectedCalls | expectedResponseBodyIsMap
-            'feature on, valid topic'  | true                       | 'valid' || 1             | true
-            'feature on, no topic'     | true                       | null    || 0             | false
-            'feature off, valid topic' | false                      | 'valid' || 0             | false
-            'feature off, no topic'    | false                      | null    || 0             | false
+            scenario                   | notificationFeatureEnabled | topic   || expectSynchronousResponse
+            'feature on, valid topic'  | true                       | 'valid' || false
+            'feature on, no topic'     | true                       | null    || true
+            'feature off, valid topic' | false                      | 'valid' || true
+            'feature off, no topic'    | false                      | null    || true
     }
 
     def 'Attempt to execute async data operation request with feature #scenario.'() {
@@ -86,21 +93,12 @@ class NcmpDatastoreRequestHandlerSpec extends Specification {
         and: 'a data operation request with datastore: #datastore'
             def dataOperationDefinition = new DataOperationDefinition(operation: 'read', datastore: datastore)
             def dataOperationRequest = new DataOperationRequest(dataOperationDefinitions: [dataOperationDefinition])
-        and: ' a flag to track the network service call'
-            def networkServiceMethodCalled = false
-        and: 'the (mocked) service will use the flag to indicate it is called'
-            mockNetworkCmProxyDataService.executeDataOperationForCmHandles('myTopic', dataOperationRequest, _, NO_AUTH_HEADER) >> {
-                networkServiceMethodCalled = true
-            }
         when: 'data operation request is executed'
             def response = objectUnderTest.executeRequest('myTopic', dataOperationRequest, NO_AUTH_HEADER)
-        and: 'a successful response with request id is returned'
-            assert response.statusCode.value == 200
-            assert response.body.requestId != null
+        and: 'a map with request id is returned'
+            assert response.keySet()[0] == 'requestId'
         then: 'the network service is invoked'
-            new PollingConditions().within(1) {
-                assert networkServiceMethodCalled == true
-            }
+            1 * mockNetworkCmProxyDataService.executeDataOperationForCmHandles('myTopic', dataOperationRequest, _, NO_AUTH_HEADER)
         where: 'the following datastores are used'
             datastore << ['ncmp-datastore:passthrough-running', 'ncmp-datastore:passthrough-operational']
     }
diff --git a/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/util/TopicValidatorSpec.groovy b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/utils/TopicValidatorSpec.groovy
index 15e2c1c6a0..f96502984d 100644
--- a/cps-ncmp-rest/src/test/groovy/org/onap/cps/ncmp/rest/util/TopicValidatorSpec.groovy
+++ b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/utils/TopicValidatorSpec.groovy
@@ -18,9 +18,10 @@
  *  ============LICENSE_END=========================================================
  */
 
-package org.onap.cps.ncmp.rest.util
+package org.onap.cps.ncmp.utils
 
-import org.onap.cps.ncmp.rest.exceptions.InvalidTopicException
+import org.onap.cps.ncmp.exceptions.InvalidTopicException
+import org.onap.cps.ncmp.utils.TopicValidator
 import spock.lang.Specification
 
 class TopicValidatorSpec extends Specification {