2 * Copyright 2017 - 2022 ZTE Corporation.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package org.onap.holmes.engine.dmaap;
18 import jakarta.annotation.PreDestroy;
19 import lombok.extern.slf4j.Slf4j;
20 import org.onap.holmes.common.database.DbDaoUtil;
21 import org.onap.holmes.dsa.dmaappolling.Subscriber;
22 import org.onap.holmes.engine.db.AlarmInfoDaoService;
23 import org.onap.holmes.engine.db.jdbi.AlarmInfoDao;
24 import org.onap.holmes.engine.manager.DroolsEngine;
25 import org.springframework.beans.factory.annotation.Autowired;
26 import org.springframework.stereotype.Component;
28 import java.util.HashMap;
29 import java.util.Iterator;
34 public class SubscriberAction {
37 private DroolsEngine droolsEngine;
39 private DbDaoUtil daoUtil;
41 private AlarmInfoDaoService alarmInfoDaoService;
43 private HashMap<String, DMaaPAlarmPolling> pollingTasks = new HashMap<>();
45 public synchronized void addSubscriber(Subscriber subscriber) {
46 String topic = subscriber.getTopic();
48 if (pollingTasks.containsKey(topic)) {
49 removeSubscriber(subscriber);
51 AlarmInfoDao alarmInfoDao = daoUtil.getJdbiDaoByOnDemand(AlarmInfoDao.class);
52 DMaaPAlarmPolling pollingTask = new DMaaPAlarmPolling(subscriber, droolsEngine, alarmInfoDaoService);
53 Thread thread = new Thread(pollingTask);
55 pollingTasks.put(topic, pollingTask);
56 log.info("Subscribed to topic: " + subscriber.getUrl());
58 log.info("The topic is null. Operation aborted.");
62 public synchronized void removeSubscriber(Subscriber subscriber) {
63 String topic = subscriber.getTopic();
64 if (topic != null && pollingTasks.containsKey(topic)) {
65 pollingTasks.get(topic).stopTask();
66 pollingTasks.remove(topic);
68 log.info("Topic unsubscribed: " + subscriber.getUrl());
72 public void stopPollingTasks() {
73 Iterator iterator = pollingTasks.entrySet().iterator();
74 while (iterator.hasNext()) {
75 Map.Entry entry = (Map.Entry) iterator.next();
76 String key = (String) entry.getKey();
77 pollingTasks.get(key).stopTask();