1 files changed, 117 insertions, 0 deletions
diff --git a/openecomp-be/lib/openecomp-sdc-notification-lib/openecomp-sdc-notification-worker/src/main/java/org/openecomp/sdc/notification/workers/NotificationWorker.java b/openecomp-be/lib/openecomp-sdc-notification-lib/openecomp-sdc-notification-worker/src/main/java/org/openecomp/sdc/notification/workers/NotificationWorker.java
new file mode 100644
index 0000000000..e8c2006d5c
--- /dev/null
+++ b/openecomp-be/lib/openecomp-sdc-notification-lib/openecomp-sdc-notification-worker/src/main/java/org/openecomp/sdc/notification/workers/NotificationWorker.java
@@ -0,0 +1,117 @@
+/*-
+ * ============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.workers;
+
+import org.apache.commons.collections4.CollectionUtils;
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+import org.openecomp.sdc.notification.config.ConfigurationManager;
+import org.openecomp.sdc.notification.types.NotificationsStatusDto;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Consumer;
+
+public class NotificationWorker {
+
+	private static final int DEFAULT_POLLING_INTERVAL = 2000;
+	private static final String POLLING_INTERVAL = "pollingIntervalMsec";
+	private static final int DEFAULT_SELECTION_LIMIT = 10;
+	private static final String SELECTION_SIZE = "selectionSize";
+
+	private static boolean stopRunning = false;
+
+	private int selectionLimit = DEFAULT_SELECTION_LIMIT;
+	private int pollingSleepInterval = DEFAULT_POLLING_INTERVAL;
+
+	private static final Logger LOGGER = LoggerFactory.getLogger(NotificationWorker.class);
+
+	private static Map<String, NotificationReceiver> activeUsers = new ConcurrentHashMap<>();
+	private NewNotificationsReader news = null;
+
+	public NotificationWorker(NewNotificationsReader news) {
+		ConfigurationManager cm = ConfigurationManager.getInstance();
+		pollingSleepInterval = cm.getConfigValue(POLLING_INTERVAL, DEFAULT_POLLING_INTERVAL);
+		selectionLimit = cm.getConfigValue(SELECTION_SIZE, DEFAULT_SELECTION_LIMIT);
+
+		Objects.requireNonNull(news, "NotificationNews object is not initialized.");
+		this.news = news;
+
+		NotificationWorker.Poller p = new Poller();
+		Thread thread = new Thread(p);
+		thread.start();
+	}
+
+	public Map<String, NotificationReceiver> getActiveUsers() {
+		return activeUsers;
+	}
+
+	public class Poller extends Thread {
+		public void run() {
+			try {
+				while (!stopRunning) {
+					pollNotifications();
+					Thread.sleep(pollingSleepInterval);
+				}
+			}
+			catch (InterruptedException e) {
+				LOGGER.error("Interrupted Exception during Notification poller launch.", e);
+			}
+		}
+
+		private void pollNotifications() {
+
+			Map<String, NotificationReceiver> currUsers = new HashMap<>();
+			currUsers.putAll(getActiveUsers());
+
+			for (NotificationReceiver receiver : currUsers.values()) {
+				String ownerId = receiver.getOwnerId();
+				UUID eventId = receiver.getlastEventId();
+				NotificationsStatusDto status = news.getNewNotifications(ownerId, eventId, selectionLimit);
+				if(Objects.nonNull(status) && CollectionUtils.isNotEmpty(status.getNotifications())) {
+					receiver.setLastEventId(status.getLastScanned());
+					receiver.getNotesProcessor().accept(status);
+				}
+			}
+		}
+
+	}
+
+	public void register(String ownerId, UUID lastDelivered, Consumer<NotificationsStatusDto> notesProcessor) {
+		NotificationReceiver receiver = new NotificationReceiver(ownerId, lastDelivered, notesProcessor);
+		activeUsers.put(ownerId, receiver);
+		LOGGER.debug("User {} is registered with eventId: {}", ownerId, receiver.getlastEventId());
+	}
+
+	public void unregister(String ownerId) {
+		activeUsers.remove(ownerId);
+		LOGGER.debug("User {} is unregistered.", ownerId);
+	}
+
+	public void stopPolling() {
+		LOGGER.debug("Stop notification polling.");
+		stopRunning = true;
+	}
+
+}