1 files changed, 92 insertions, 0 deletions
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
new file mode 100644
index 000000000..a6d313b05
--- /dev/null
+++ b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/controller/handlers/NcmpDatastoreResourceRequestHandler.java
@@ -0,0 +1,92 @@
+/*
+ *  ============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);
+    }
+}