1 files changed, 139 insertions, 0 deletions
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/init/AbstractModelLoader.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/init/AbstractModelLoader.java
new file mode 100644
index 000000000..349b1c5b0
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/init/AbstractModelLoader.java
@@ -0,0 +1,139 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2023 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.init;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.time.OffsetDateTime;
+import java.util.Map;
+import lombok.NonNull;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.onap.cps.api.CpsAdminService;
+import org.onap.cps.api.CpsDataService;
+import org.onap.cps.api.CpsModuleService;
+import org.onap.cps.ncmp.api.impl.exception.NcmpStartUpException;
+import org.onap.cps.spi.exceptions.AlreadyDefinedException;
+import org.onap.cps.utils.JsonObjectMapper;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.stereotype.Service;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+abstract class AbstractModelLoader implements ModelLoader {
+
+    private final CpsAdminService cpsAdminService;
+    private final CpsModuleService cpsModuleService;
+    private final CpsDataService cpsDataService;
+
+    private static final int EXIT_CODE_ON_ERROR = 1;
+
+    private final JsonObjectMapper jsonObjectMapper = new JsonObjectMapper(new ObjectMapper());
+
+    @Value("${ncmp.model-loader.maximum-attempt-count:20}")
+    int maximumAttemptCount;
+
+    @Value("${ncmp.timers.model-loader.retry-time-ms:1000}")
+    long retryTimeMs;
+
+    @Override
+    public void onApplicationEvent(@NonNull final ApplicationReadyEvent applicationReadyEvent) {
+        try {
+            onboardOrUpgradeModel();
+        } catch (final NcmpStartUpException ncmpStartUpException) {
+            log.error("Onboarding model for NCMP failed: {} ", ncmpStartUpException.getMessage());
+            SpringApplication.exit(applicationReadyEvent.getApplicationContext(), () -> EXIT_CODE_ON_ERROR);
+        }
+    }
+
+    void waitUntilDataspaceIsAvailable(final String dataspaceName) {
+        int attemptCount = 0;
+        while (cpsAdminService.getDataspace(dataspaceName) == null) {
+            if (attemptCount < maximumAttemptCount) {
+                try {
+                    Thread.sleep(attemptCount * retryTimeMs);
+                    log.info("Retrieving dataspace {} ... {} attempt(s) ", dataspaceName, ++attemptCount);
+                } catch (final InterruptedException e) {
+                    Thread.currentThread().interrupt();
+                }
+            } else {
+                throw new NcmpStartUpException("Retrieval of NCMP dataspace failed",
+                    dataspaceName + " not available (yet)");
+            }
+        }
+    }
+
+    void createSchemaSet(final String dataspaceName, final String schemaSetName, final String resourceName) {
+        try {
+            final Map<String, String> yangResourceContentMap = createYangResourceToContentMap(resourceName);
+            cpsModuleService.createSchemaSet(dataspaceName, schemaSetName, yangResourceContentMap);
+        } catch (final AlreadyDefinedException alreadyDefinedException) {
+            log.warn("Creating new schema set failed as schema set already exists");
+        } catch (final Exception exception) {
+            log.error("Creating schema set for subscription model failed: {} ", exception.getMessage());
+            throw new NcmpStartUpException("Creating schema set failed", exception.getMessage());
+        }
+    }
+
+    void createAnchor(final String dataspaceName, final String schemaSetName, final String anchorName) {
+        try {
+            cpsAdminService.createAnchor(dataspaceName, schemaSetName, anchorName);
+        } catch (final AlreadyDefinedException alreadyDefinedException) {
+            log.warn("Creating new anchor failed as anchor already exists");
+        } catch (final Exception exception) {
+            log.error("Creating anchor for subscription model failed: {} ", exception.getMessage());
+            throw new NcmpStartUpException("Creating anchor failed", exception.getMessage());
+        }
+    }
+
+    void createTopLevelDataNode(final String dataspaceName,
+                                        final String anchorName,
+                                        final String dataNodeName) {
+        final String nodeData = jsonObjectMapper.asJsonString(Map.of(dataNodeName, Map.of()));
+        try {
+            cpsDataService.saveData(dataspaceName, anchorName, nodeData, OffsetDateTime.now());
+        } catch (final AlreadyDefinedException exception) {
+            log.warn("Creating new data node '{}' failed as data node already exists", dataNodeName);
+        } catch (final Exception exception) {
+            log.error("Creating data node for subscription model failed: {}", exception.getMessage());
+            throw new NcmpStartUpException("Creating data node failed", exception.getMessage());
+        }
+    }
+
+    Map<String, String> createYangResourceToContentMap(final String resourceName) {
+        return Map.of(resourceName, getFileContentAsString("models/" + resourceName));
+    }
+
+    private String getFileContentAsString(final String fileName) {
+        try (InputStream inputStream = getClass().getClassLoader().getResourceAsStream(fileName)) {
+            return new String(inputStream.readAllBytes(), StandardCharsets.UTF_8);
+        } catch (final Exception exception) {
+            final String message = String.format("Onboarding failed as unable to read file: %s", fileName);
+            log.debug(message);
+            throw new NcmpStartUpException(message, exception.getMessage());
+        }
+    }
+
+}