1 files changed, 105 insertions, 0 deletions
diff --git a/openecomp-be/api/openecomp-sdc-rest-webapp/item-rest/item-rest-services/src/main/java/org/openecomp/sdcrests/item/rest/services/catalog/notification/NotifierFactory.java b/openecomp-be/api/openecomp-sdc-rest-webapp/item-rest/item-rest-services/src/main/java/org/openecomp/sdcrests/item/rest/services/catalog/notification/NotifierFactory.java
new file mode 100644
index 0000000000..a7f1e9c7fb
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+++ b/openecomp-be/api/openecomp-sdc-rest-webapp/item-rest/item-rest-services/src/main/java/org/openecomp/sdcrests/item/rest/services/catalog/notification/NotifierFactory.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * 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.
+ */
+
+package org.openecomp.sdcrests.item.rest.services.catalog.notification;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Collection;
+import java.util.Map;
+import java.util.Objects;
+import org.onap.sdc.tosca.services.YamlUtil;
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+import org.openecomp.sdcrests.item.rest.services.catalog.notification.http.HttpConfiguration;
+import org.openecomp.sdcrests.item.rest.services.catalog.notification.http.HttpTaskProducer;
+import org.openecomp.sdcrests.item.types.ItemAction;
+
+/**
+ * Creates an instance of {@link Notifier}, initialized according to current configuration.
+ * The configuration must be passed via the {@link #CONFIG_FILE_PROPERTY} JVM argument.
+ */
+public class NotifierFactory {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(NotifierFactory.class);
+
+    private static final String CONFIG_FILE_PROPERTY = "configuration.yaml";
+    private static final String CONFIG_SECTION = "catalogNotificationsConfig";
+
+    private static final Notifier INSTANCE;
+
+    static {
+        INSTANCE = createInstance();
+    }
+
+    /**
+     * Returns a {@link Notifier} instance according to the provided configuration. If no configuration was not
+     * provided, or the given configuration is incorrect, then an instance with reduced functionality will be returned.
+     *
+     * @return available instance of {@link Notifier}
+     */
+    public static Notifier getInstance() {
+        return INSTANCE;
+    }
+
+    static Notifier createInstance() {
+
+        try {
+
+            String file = Objects.requireNonNull(System.getProperty(CONFIG_FILE_PROPERTY),
+                    "Config file location must be specified via system property " + CONFIG_FILE_PROPERTY);
+
+            Object config = getNotificationConfiguration(file);
+            ObjectMapper mapper = new ObjectMapper();
+            HttpConfiguration httpConfig = mapper.convertValue(config, HttpConfiguration.class);
+
+            return new AsyncNotifier(new HttpTaskProducer(httpConfig));
+
+        } catch (Exception e) {
+            LOGGER.warn("Failed to initialize notifier. Notifications will not be sent", e);
+            return new UnsupportedConfigurationNotifier();
+        }
+    }
+
+    private static Object getNotificationConfiguration(String file) throws IOException {
+
+        Map<?, ?> configuration = Objects.requireNonNull(readConfigurationFile(file), "Configuration cannot be empty");
+        Object notificationConfig = configuration.get(CONFIG_SECTION);
+        if (notificationConfig == null) {
+            throw new EntryNotConfiguredException(CONFIG_SECTION + " section");
+        }
+
+        return notificationConfig;
+    }
+
+    private static Map<?, ?> readConfigurationFile(String file) throws IOException {
+
+        try (InputStream fileInput = new FileInputStream(file)) {
+            YamlUtil yamlUtil = new YamlUtil();
+            return yamlUtil.yamlToMap(fileInput);
+        }
+    }
+
+    static class UnsupportedConfigurationNotifier implements Notifier {
+
+        @Override
+        public void execute(Collection<String> itemIds, ItemAction action) {
+            throw new IllegalStateException("Cannot send notifications. The notifier was not properly initialized");
+        }
+    }
+}