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/*-
* ============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;
}
}
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