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/*
* Copyright 2017 - 2022 ZTE Corporation.
*
* 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.onap.holmes.engine.dmaap;
import jakarta.annotation.PreDestroy;
import lombok.extern.slf4j.Slf4j;
import org.onap.holmes.common.database.DbDaoUtil;
import org.onap.holmes.dsa.dmaappolling.Subscriber;
import org.onap.holmes.engine.db.AlarmInfoDaoService;
import org.onap.holmes.engine.db.jdbi.AlarmInfoDao;
import org.onap.holmes.engine.manager.DroolsEngine;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
@Component
@Slf4j
public class SubscriberAction {
@Autowired
private DroolsEngine droolsEngine;
@Autowired
private DbDaoUtil daoUtil;
@Autowired
private AlarmInfoDaoService alarmInfoDaoService;
private HashMap<String, DMaaPAlarmPolling> pollingTasks = new HashMap<>();
public synchronized void addSubscriber(Subscriber subscriber) {
String topic = subscriber.getTopic();
if (topic != null) {
if (pollingTasks.containsKey(topic)) {
removeSubscriber(subscriber);
}
AlarmInfoDao alarmInfoDao = daoUtil.getJdbiDaoByOnDemand(AlarmInfoDao.class);
DMaaPAlarmPolling pollingTask = new DMaaPAlarmPolling(subscriber, droolsEngine, alarmInfoDaoService);
Thread thread = new Thread(pollingTask);
thread.start();
pollingTasks.put(topic, pollingTask);
log.info("Subscribed to topic: " + subscriber.getUrl());
} else {
log.info("The topic is null. Operation aborted.");
}
}
public synchronized void removeSubscriber(Subscriber subscriber) {
String topic = subscriber.getTopic();
if (topic != null && pollingTasks.containsKey(topic)) {
pollingTasks.get(topic).stopTask();
pollingTasks.remove(topic);
}
log.info("Topic unsubscribed: " + subscriber.getUrl());
}
@PreDestroy
public void stopPollingTasks() {
Iterator iterator = pollingTasks.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry entry = (Map.Entry) iterator.next();
String key = (String) entry.getKey();
pollingTasks.get(key).stopTask();
}
pollingTasks.clear();
}
}
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