Query data NCMP-Operational with CPSpath

New GET Endpoint: /v1/ch/{cm-handle}/data/ds/{ncmp-datastore-name}/query?cps-path={CPSPath}
Implemented error for {ncmp-datastore-name} other than operational
- (Toine) Refactored and renamed (abstract) handler for better re-use
Mainly by introducing a separate handler for OperationalQuery

Reviewers Toine, Sourabh, Priyank

Issue-ID: CPS-1002
Signed-off-by: lukegleeson <luke.gleeson@est.tech>
Change-Id: Iaca018869d95d4ce800072431baa190050a6dad0

8 files changed, 237 insertions, 129 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 2f6668a351..9f171f6094 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
@@ -39,7 +39,7 @@ import org.onap.cps.ncmp.api.models.CmHandleQueryApiParameters;
 import org.onap.cps.ncmp.api.models.NcmpServiceCmHandle;
 import org.onap.cps.ncmp.rest.api.NetworkCmProxyApi;
 import org.onap.cps.ncmp.rest.controller.handlers.DatastoreType;
-import org.onap.cps.ncmp.rest.controller.handlers.NcmpDatastoreResourceRequestHandler;
+import org.onap.cps.ncmp.rest.controller.handlers.NcmpDatastoreRequestHandler;
 import org.onap.cps.ncmp.rest.controller.handlers.NcmpDatastoreResourceRequestHandlerFactory;
 import org.onap.cps.ncmp.rest.exceptions.InvalidDatastoreException;
 import org.onap.cps.ncmp.rest.mapper.CmHandleStateMapper;
@@ -91,15 +91,42 @@ public class NetworkCmProxyController implements NetworkCmProxyApi {
                                                              final String topicParamInQuery,
                                                              final Boolean includeDescendants) {
 
-        final NcmpDatastoreResourceRequestHandler ncmpDatastoreResourceRequestHandler =
+        final NcmpDatastoreRequestHandler ncmpDatastoreRequestHandler =
                 ncmpDatastoreResourceRequestHandlerFactory.getNcmpDatastoreResourceRequestHandler(
                         DatastoreType.fromDatastoreName(datastoreName));
 
-        return ncmpDatastoreResourceRequestHandler.getResourceData(cmHandle, resourceIdentifier,
+        return ncmpDatastoreRequestHandler.executeRequest(cmHandle, resourceIdentifier,
                 optionsParamInQuery, topicParamInQuery, includeDescendants);
     }
 
     /**
+     * Query resource data from datastore.
+     *
+     * @param datastoreName       name of the datastore
+     * @param cmHandle            cm handle identifier
+     * @param cpsPath             CPS Path
+     * @param optionsParamInQuery options query parameter
+     * @param topicParamInQuery   topic query parameter
+     * @param includeDescendants  whether include descendants
+     * @return {@code ResponseEntity} response from dmi plugin
+     */
+
+    @Override
+    public ResponseEntity<Object> queryResourceDataForCmHandle(final String datastoreName,
+                                                               final String cmHandle,
+                                                               final String cpsPath,
+                                                               final String optionsParamInQuery,
+                                                               final String topicParamInQuery,
+                                                               final Boolean includeDescendants) {
+        validateDataStore(DatastoreType.OPERATIONAL, datastoreName);
+        final NcmpDatastoreRequestHandler ncmpDatastoreRequestHandler =
+            ncmpDatastoreResourceRequestHandlerFactory.getNcmpDatastoreResourceQueryHandler();
+
+        return ncmpDatastoreRequestHandler.executeRequest(cmHandle, cpsPath, optionsParamInQuery,
+            topicParamInQuery, includeDescendants);
+    }
+
+    /**
      * Patch resource data from passthrough-running.
      *
      * @param resourceIdentifier resource identifier
@@ -117,7 +144,7 @@ public class NetworkCmProxyController implements NetworkCmProxyApi {
                                                                       final Object requestBody,
                                                                       final String contentType) {
 
-        acceptPassthroughRunningOnly(datastoreName);
+        validateDataStore(DatastoreType.PASSTHROUGH_RUNNING, datastoreName);
 
         final Object responseObject = networkCmProxyDataService
                 .writeResourceDataPassThroughRunningForCmHandle(
@@ -143,7 +170,7 @@ public class NetworkCmProxyController implements NetworkCmProxyApi {
                                                                      final Object requestBody,
                                                                      final String contentType) {
 
-        acceptPassthroughRunningOnly(datastoreName);
+        validateDataStore(DatastoreType.PASSTHROUGH_RUNNING, datastoreName);
 
         networkCmProxyDataService.writeResourceDataPassThroughRunningForCmHandle(cmHandle,
                 resourceIdentifier, CREATE, jsonObjectMapper.asJsonString(requestBody), contentType);
@@ -167,7 +194,7 @@ public class NetworkCmProxyController implements NetworkCmProxyApi {
                                                                        final String cmHandle,
                                                                        final Object requestBody,
                                                                        final String contentType) {
-        acceptPassthroughRunningOnly(datastoreName);
+        validateDataStore(DatastoreType.PASSTHROUGH_RUNNING, datastoreName);
 
         networkCmProxyDataService.writeResourceDataPassThroughRunningForCmHandle(cmHandle,
                 resourceIdentifier, UPDATE, jsonObjectMapper.asJsonString(requestBody), contentType);
@@ -189,7 +216,7 @@ public class NetworkCmProxyController implements NetworkCmProxyApi {
                                                                      final String resourceIdentifier,
                                                                      final String contentType) {
 
-        acceptPassthroughRunningOnly(datastoreName);
+        validateDataStore(DatastoreType.PASSTHROUGH_RUNNING, datastoreName);
 
         networkCmProxyDataService.writeResourceDataPassThroughRunningForCmHandle(cmHandle,
                 resourceIdentifier, DELETE, NO_BODY, contentType);
@@ -332,11 +359,11 @@ public class NetworkCmProxyController implements NetworkCmProxyApi {
         return restOutputCmHandle;
     }
 
-    private void acceptPassthroughRunningOnly(final String datastoreName) {
-        final DatastoreType datastoreType = DatastoreType.fromDatastoreName(datastoreName);
+    private void validateDataStore(final DatastoreType acceptableDataStoreType, final String requestedDatastoreName) {
+        final DatastoreType datastoreType = DatastoreType.fromDatastoreName(requestedDatastoreName);
 
-        if (DatastoreType.PASSTHROUGH_RUNNING != datastoreType) {
-            throw new InvalidDatastoreException(datastoreName + " is not supported");
+        if (acceptableDataStoreType != datastoreType) {
+            throw new InvalidDatastoreException(requestedDatastoreName + " is not supported");
         }
     }
 }
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreOperationalQueryHandler.java b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreOperationalQueryHandler.java
new file mode 100644
index 0000000000..0586d42625
--- /dev/null
+++ b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreOperationalQueryHandler.java
@@ -0,0 +1,56 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 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.rest.controller.handlers;
+
+import java.util.function.Supplier;
+import lombok.extern.slf4j.Slf4j;
+import org.onap.cps.ncmp.api.NetworkCmProxyQueryService;
+import org.onap.cps.ncmp.rest.executor.CpsNcmpTaskExecutor;
+import org.onap.cps.spi.FetchDescendantsOption;
+
+@Slf4j
+public class NcmpDatastoreOperationalQueryHandler extends NcmpDatastoreRequestHandler {
+
+    private final NetworkCmProxyQueryService networkCmProxyQueryService;
+
+    public NcmpDatastoreOperationalQueryHandler(final NetworkCmProxyQueryService networkCmProxyQueryService,
+                                                final CpsNcmpTaskExecutor cpsNcmpTaskExecutor,
+                                                final int timeOutInMilliSeconds,
+                                                final boolean notificationFeatureEnabled) {
+        super(null, cpsNcmpTaskExecutor, timeOutInMilliSeconds, notificationFeatureEnabled);
+        this.networkCmProxyQueryService = networkCmProxyQueryService;
+    }
+
+    @Override
+    public Supplier<Object> getTaskSupplier(final String cmHandle,
+                                            final String resourceIdentifier,
+                                            final String optionsParamInQuery,
+                                            final String topicParamInQuery,
+                                            final String requestId,
+                                            final Boolean includeDescendant) {
+
+        final FetchDescendantsOption fetchDescendantsOption = getFetchDescendantsOption(includeDescendant);
+
+        return () -> networkCmProxyQueryService.queryResourceDataOperational(cmHandle, resourceIdentifier,
+            fetchDescendantsOption);
+    }
+
+}
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreOperationalResourceRequestHandler.java b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreOperationalResourceRequestHandler.java
index 6ed9b8c4d1..a4720b22ff 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreOperationalResourceRequestHandler.java
+++ b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreOperationalResourceRequestHandler.java
@@ -27,7 +27,7 @@ import org.onap.cps.ncmp.rest.executor.CpsNcmpTaskExecutor;
 import org.onap.cps.spi.FetchDescendantsOption;
 
 @Slf4j
-public class NcmpDatastoreOperationalResourceRequestHandler extends NcmpDatastoreResourceRequestHandler {
+public class NcmpDatastoreOperationalResourceRequestHandler extends NcmpDatastoreRequestHandler {
 
     public NcmpDatastoreOperationalResourceRequestHandler(final NetworkCmProxyDataService networkCmProxyDataService,
                                                           final CpsNcmpTaskExecutor cpsNcmpTaskExecutor,
@@ -37,16 +37,14 @@ public class NcmpDatastoreOperationalResourceRequestHandler extends NcmpDatastor
     }
 
     @Override
-    public Supplier<Object> getTask(final String cmHandle,
-                                    final String resourceIdentifier,
-                                    final String optionsParamInQuery,
-                                    final String topicParamInQuery,
-                                    final String requestId,
-                                    final Boolean includeDescendant) {
-
-        final FetchDescendantsOption fetchDescendantsOption =
-                Boolean.TRUE.equals(includeDescendant) ? FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS
-                        : FetchDescendantsOption.OMIT_DESCENDANTS;
+    public Supplier<Object> getTaskSupplier(final String cmHandle,
+                                            final String resourceIdentifier,
+                                            final String optionsParamInQuery,
+                                            final String topicParamInQuery,
+                                            final String requestId,
+                                            final Boolean includeDescendant) {
+
+        final FetchDescendantsOption fetchDescendantsOption = getFetchDescendantsOption(includeDescendant);
 
         return () -> networkCmProxyDataService.getResourceDataOperational(cmHandle, resourceIdentifier,
                 fetchDescendantsOption);
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastorePassthroughOperationalResourceRequestHandler.java b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastorePassthroughOperationalResourceRequestHandler.java
index 196e5bd33d..1445e3e271 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastorePassthroughOperationalResourceRequestHandler.java
+++ b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastorePassthroughOperationalResourceRequestHandler.java
@@ -26,7 +26,7 @@ import org.onap.cps.ncmp.api.NetworkCmProxyDataService;
 import org.onap.cps.ncmp.rest.executor.CpsNcmpTaskExecutor;
 
 @Slf4j
-public class NcmpDatastorePassthroughOperationalResourceRequestHandler extends NcmpDatastoreResourceRequestHandler {
+public class NcmpDatastorePassthroughOperationalResourceRequestHandler extends NcmpDatastoreRequestHandler {
 
     public NcmpDatastorePassthroughOperationalResourceRequestHandler(
             final NetworkCmProxyDataService networkCmProxyDataService,
@@ -37,12 +37,12 @@ public class NcmpDatastorePassthroughOperationalResourceRequestHandler extends N
     }
 
     @Override
-    public Supplier<Object> getTask(final String cmHandle,
-                                    final String resourceIdentifier,
-                                    final String optionsParamInQuery,
-                                    final String topicParamInQuery,
-                                    final String requestId,
-                                    final Boolean includeDescendant) {
+    public Supplier<Object> getTaskSupplier(final String cmHandle,
+                                            final String resourceIdentifier,
+                                            final String optionsParamInQuery,
+                                            final String topicParamInQuery,
+                                            final String requestId,
+                                            final Boolean includeDescendant) {
 
         return () -> networkCmProxyDataService.getResourceDataOperationalForCmHandle(
                 cmHandle, resourceIdentifier, optionsParamInQuery, topicParamInQuery, requestId);
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastorePassthroughRunningResourceRequestHandler.java b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastorePassthroughRunningResourceRequestHandler.java
index 5bf16b7499..8194ec9fd5 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastorePassthroughRunningResourceRequestHandler.java
+++ b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastorePassthroughRunningResourceRequestHandler.java
@@ -26,7 +26,7 @@ import org.onap.cps.ncmp.api.NetworkCmProxyDataService;
 import org.onap.cps.ncmp.rest.executor.CpsNcmpTaskExecutor;
 
 @Slf4j
-public class NcmpDatastorePassthroughRunningResourceRequestHandler extends NcmpDatastoreResourceRequestHandler {
+public class NcmpDatastorePassthroughRunningResourceRequestHandler extends NcmpDatastoreRequestHandler {
 
     public NcmpDatastorePassthroughRunningResourceRequestHandler(
             final NetworkCmProxyDataService networkCmProxyDataService,
@@ -37,12 +37,12 @@ public class NcmpDatastorePassthroughRunningResourceRequestHandler extends NcmpD
     }
 
     @Override
-    public Supplier<Object> getTask(final String cmHandle,
-                                    final String resourceIdentifier,
-                                    final String optionsParamInQuery,
-                                    final String topicParamInQuery,
-                                    final String requestId,
-                                    final Boolean includeDescendant) {
+    public Supplier<Object> getTaskSupplier(final String cmHandle,
+                                            final String resourceIdentifier,
+                                            final String optionsParamInQuery,
+                                            final String topicParamInQuery,
+                                            final String requestId,
+                                            final Boolean includeDescendant) {
 
         return () -> networkCmProxyDataService.getResourceDataPassThroughRunningForCmHandle(
                 cmHandle, resourceIdentifier, optionsParamInQuery, topicParamInQuery, requestId);
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreRequestHandler.java b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreRequestHandler.java
new file mode 100644
index 0000000000..850200396b
--- /dev/null
+++ b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreRequestHandler.java
@@ -0,0 +1,106 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 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.rest.controller.handlers;
+
+import java.util.Map;
+import java.util.UUID;
+import java.util.function.Supplier;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.onap.cps.ncmp.api.NetworkCmProxyDataService;
+import org.onap.cps.ncmp.rest.executor.CpsNcmpTaskExecutor;
+import org.onap.cps.ncmp.rest.util.TopicValidator;
+import org.onap.cps.spi.FetchDescendantsOption;
+import org.springframework.http.ResponseEntity;
+
+@RequiredArgsConstructor
+@Slf4j
+public abstract class NcmpDatastoreRequestHandler {
+
+    private static final String NO_REQUEST_ID = null;
+    private static final String NO_TOPIC = null;
+
+    protected final NetworkCmProxyDataService networkCmProxyDataService;
+    protected final CpsNcmpTaskExecutor cpsNcmpTaskExecutor;
+    protected final int timeOutInMilliSeconds;
+    protected final boolean notificationFeatureEnabled;
+
+    protected abstract Supplier<Object> getTaskSupplier(final String cmHandle,
+                                                        final String resourceIdentifier,
+                                                        final String optionsParamInQuery,
+                                                        final String topicParamInQuery,
+                                                        final String requestId,
+                                                        final Boolean includeDescendant);
+
+    /**
+     * Execute a request on a datastore.
+     *
+     * @param cmHandleId          the cm handle
+     * @param resourceIdentifier  the resource identifier
+     * @param optionsParamInQuery the options param in query
+     * @param topicParamInQuery   the topic param in query
+     * @param includeDescendants  whether include descendants
+     * @return the response entity
+     */
+    public ResponseEntity<Object> executeRequest(final String cmHandleId,
+                                                 final String resourceIdentifier,
+                                                 final String optionsParamInQuery,
+                                                 final String topicParamInQuery,
+                                                 final Boolean includeDescendants) {
+
+        final boolean asyncResponseRequested = topicParamInQuery != null;
+        if (asyncResponseRequested && notificationFeatureEnabled) {
+            final String requestId = UUID.randomUUID().toString();
+            final Supplier<Object> taskSupplier = getTaskSupplier(cmHandleId, resourceIdentifier, optionsParamInQuery,
+                topicParamInQuery, requestId, includeDescendants);
+            return executeTaskAsync(topicParamInQuery, requestId, taskSupplier);
+        }
+
+        if (asyncResponseRequested) {
+            log.warn("Asynchronous request is unavailable as notification feature is currently disabled, "
+                + "will use synchronous operation.");
+        }
+        final Supplier<Object> taskSupplier = getTaskSupplier(cmHandleId, resourceIdentifier, optionsParamInQuery,
+            NO_TOPIC, NO_REQUEST_ID, includeDescendants);
+        return executeTaskSync(taskSupplier);
+    }
+
+    protected ResponseEntity<Object> executeTaskAsync(final String topicParamInQuery,
+                                                      final String requestId,
+                                                      final Supplier<Object> taskSupplier) {
+
+        TopicValidator.validateTopicName(topicParamInQuery);
+        log.debug("Received Async request with id {}", requestId);
+        cpsNcmpTaskExecutor.executeTask(taskSupplier, timeOutInMilliSeconds);
+
+        return ResponseEntity.ok(Map.of("requestId", requestId));
+    }
+
+    protected ResponseEntity<Object> executeTaskSync(final Supplier<Object> taskSupplier) {
+        return ResponseEntity.ok(taskSupplier.get());
+    }
+
+    protected static FetchDescendantsOption getFetchDescendantsOption(final Boolean includeDescendant) {
+        return Boolean.TRUE.equals(includeDescendant) ? FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS
+            : FetchDescendantsOption.OMIT_DESCENDANTS;
+    }
+
+}
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreResourceRequestHandler.java b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreResourceRequestHandler.java
deleted file mode 100644
index a6d313b05f..0000000000
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreResourceRequestHandler.java
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- *  ============LICENSE_START=======================================================
- *  Copyright (C) 2022 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.rest.controller.handlers;
-
-import java.util.Map;
-import java.util.UUID;
-import java.util.function.Supplier;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.onap.cps.ncmp.api.NetworkCmProxyDataService;
-import org.onap.cps.ncmp.rest.executor.CpsNcmpTaskExecutor;
-import org.onap.cps.ncmp.rest.util.TopicValidator;
-import org.springframework.http.ResponseEntity;
-
-@RequiredArgsConstructor
-@Slf4j
-public abstract class NcmpDatastoreResourceRequestHandler {
-
-    private static final String NO_REQUEST_ID = null;
-    private static final String NO_TOPIC = null;
-
-    protected final NetworkCmProxyDataService networkCmProxyDataService;
-    protected final CpsNcmpTaskExecutor cpsNcmpTaskExecutor;
-    protected final int timeOutInMilliSeconds;
-    protected final boolean notificationFeatureEnabled;
-
-    protected abstract Supplier<Object> getTask(final String cmHandle,
-                                                final String resourceIdentifier,
-                                                final String optionsParamInQuery,
-                                                final String topicParamInQuery,
-                                                final String requestId,
-                                                final Boolean includeDescendant);
-
-
-    /**
-     * Get resource data from datastore.
-     *
-     * @param cmHandleId          the cm handle
-     * @param resourceIdentifier  the resource identifier
-     * @param optionsParamInQuery the options param in query
-     * @param topicParamInQuery   the topic param in query
-     * @param includeDescendants  whether include descendants
-     * @return the response entity
-     */
-    public ResponseEntity<Object> getResourceData(final String cmHandleId,
-                                                  final String resourceIdentifier,
-                                                  final String optionsParamInQuery,
-                                                  final String topicParamInQuery,
-                                                  final Boolean includeDescendants) {
-
-        final String requestId = UUID.randomUUID().toString();
-        final boolean asyncResponseRequested = topicParamInQuery != null;
-
-        if (asyncResponseRequested && notificationFeatureEnabled) {
-            TopicValidator.validateTopicName(topicParamInQuery);
-            log.debug("Received Async request with id {}", requestId);
-            cpsNcmpTaskExecutor.executeTask(
-                    getTask(cmHandleId, resourceIdentifier, optionsParamInQuery, topicParamInQuery, requestId,
-                            includeDescendants), timeOutInMilliSeconds);
-
-            return ResponseEntity.ok(Map.of("requestId", requestId));
-        }
-
-        if (asyncResponseRequested) {
-            log.warn("Asynchronous messaging is currently disabled, will use synchronous operation.");
-        }
-        
-        final Object responseObject =
-                getTask(cmHandleId, resourceIdentifier, optionsParamInQuery, NO_TOPIC, NO_REQUEST_ID,
-                        includeDescendants).get();
-
-        return ResponseEntity.ok(responseObject);
-    }
-}
diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreResourceRequestHandlerFactory.java b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreResourceRequestHandlerFactory.java
index 7db754279c..ff7bda6a47 100644
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreResourceRequestHandlerFactory.java
+++ b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreResourceRequestHandlerFactory.java
@@ -22,6 +22,7 @@ package org.onap.cps.ncmp.rest.controller.handlers;
 
 import lombok.RequiredArgsConstructor;
 import org.onap.cps.ncmp.api.NetworkCmProxyDataService;
+import org.onap.cps.ncmp.api.NetworkCmProxyQueryService;
 import org.onap.cps.ncmp.rest.executor.CpsNcmpTaskExecutor;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Component;
@@ -31,6 +32,7 @@ import org.springframework.stereotype.Component;
 public class NcmpDatastoreResourceRequestHandlerFactory {
 
     private final NetworkCmProxyDataService networkCmProxyDataService;
+    private final NetworkCmProxyQueryService networkCmProxyQueryService;
     private final CpsNcmpTaskExecutor cpsNcmpTaskExecutor;
 
     @Value("${notification.async.executor.time-out-value-in-ms:2000}")
@@ -44,7 +46,7 @@ public class NcmpDatastoreResourceRequestHandlerFactory {
      * @param datastoreType the datastore type
      * @return the ncmp datastore handler
      */
-    public NcmpDatastoreResourceRequestHandler getNcmpDatastoreResourceRequestHandler(
+    public NcmpDatastoreRequestHandler getNcmpDatastoreResourceRequestHandler(
             final DatastoreType datastoreType) {
 
         switch (datastoreType) {
@@ -60,4 +62,15 @@ public class NcmpDatastoreResourceRequestHandlerFactory {
                         cpsNcmpTaskExecutor, timeOutInMilliSeconds, notificationFeatureEnabled);
         }
     }
+
+    /**
+     * Gets ncmp datastore query handler.
+     * Note. Currently only ncmp-datastore:operational supports query operations
+     * @return a ncmp datastore query handler.
+     */
+    public NcmpDatastoreRequestHandler getNcmpDatastoreResourceQueryHandler() {
+        return new NcmpDatastoreOperationalQueryHandler(networkCmProxyQueryService, cpsNcmpTaskExecutor,
+            timeOutInMilliSeconds, notificationFeatureEnabled);
+    }
+
 }