1 files changed, 113 insertions, 0 deletions
diff --git a/openecomp-be/lib/openecomp-sdc-notification-lib/openecomp-sdc-notification-worker/src/main/java/org/openecomp/sdc/notification/config/ConfigurationManager.java b/openecomp-be/lib/openecomp-sdc-notification-lib/openecomp-sdc-notification-worker/src/main/java/org/openecomp/sdc/notification/config/ConfigurationManager.java
new file mode 100644
index 0000000000..d960b8b9dc
--- /dev/null
+++ b/openecomp-be/lib/openecomp-sdc-notification-lib/openecomp-sdc-notification-worker/src/main/java/org/openecomp/sdc/notification/config/ConfigurationManager.java
@@ -0,0 +1,113 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.sdc.notification.config;
+
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+import org.openecomp.sdc.tosca.services.YamlUtil;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.function.BiConsumer;
+
+public class ConfigurationManager {
+
+    private static final String CONFIGURATION_YAML_FILE = "onboarding_configuration.yaml";
+    private static final String NOTIFICATIONS_CONFIG = "notifications";
+
+    private LinkedHashMap<String, Object> notificationsConfiguration;
+    private static final Logger LOGGER = LoggerFactory.getLogger(ConfigurationManager.class);
+    private static final ConfigurationManager SINGLETON = new ConfigurationManager();
+
+    public static ConfigurationManager getInstance() {
+        return SINGLETON;
+    }
+
+    private ConfigurationManager() {
+        initConfiguration();
+    }
+
+    private void initConfiguration() {
+
+        YamlUtil yamlUtil = new YamlUtil();
+        readConfigurationFromStream(yamlUtil, (filename, stream) -> {
+
+            if (stream == null) {
+                LOGGER.warn("Configuration not found: " + filename + ". Using defaults");
+                return;
+            }
+
+            Map<String, LinkedHashMap<String, Object>> configurationMap = yamlUtil.yamlToMap(stream);
+            if (configurationMap == null) {
+                LOGGER.warn("Configuration cannot be parsed: " + filename + ". Using defaults");
+                return;
+            }
+
+            notificationsConfiguration = configurationMap.get(NOTIFICATIONS_CONFIG);
+            if (notificationsConfiguration == null) {
+                LOGGER.error(NOTIFICATIONS_CONFIG +
+                        " is missing in configuration file '" + filename + "'. Using defaults");
+            }
+        });
+    }
+
+    private void readConfigurationFromStream(YamlUtil yamlUtil,
+                                             BiConsumer<String, InputStream> reader) {
+
+        String configurationYamlFile = System.getProperty(CONFIGURATION_YAML_FILE);
+
+        try {
+
+            if (configurationYamlFile == null) {
+
+                try (InputStream inputStream =
+                             yamlUtil.loadYamlFileIs("/" + CONFIGURATION_YAML_FILE)) {
+                    reader.accept(CONFIGURATION_YAML_FILE, inputStream);
+                }
+
+            } else {
+
+                try (InputStream inputStream = new FileInputStream(configurationYamlFile)) {
+                    reader.accept(configurationYamlFile, inputStream);
+                }
+            }
+
+        } catch (IOException e) {
+            LOGGER.error("Failed to read configuration", e);
+        }
+    }
+
+    public <T> T getConfigValue(String name, T defaultValue) {
+
+        Object value = notificationsConfiguration.get(name);
+
+        try {
+            return value == null ? defaultValue : (T) value;
+        } catch (ClassCastException e) {
+            LOGGER.warn(String.format("Failed to read configuration property '%s' as requested type. Using default '%s'",
+                    name, defaultValue), e);
+            return defaultValue;
+        }
+    }
+}