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/*
* ============LICENSE_START==========================================
* org.onap.music
* ===================================================================
* Copyright (c) 2017 AT&T Intellectual Property
* ===================================================================
* 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.onap.music.main;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
import org.onap.music.datastore.PreparedQueryObject;
import org.onap.music.exceptions.MusicLockingException;
import org.onap.music.exceptions.MusicServiceException;
import com.datastax.driver.core.ResultSet;
import com.datastax.driver.core.Row;
@WebListener
public class CronJobManager implements ServletContextListener {
private ScheduledExecutorService scheduler;
@Override
public void contextInitialized(ServletContextEvent event) {
scheduler = Executors.newSingleThreadScheduledExecutor();
scheduler.scheduleAtFixedRate(new CachingUtil(), 0, 24, TimeUnit.HOURS);
PreparedQueryObject pQuery = new PreparedQueryObject();
String consistency = MusicUtil.EVENTUAL;
pQuery.appendQueryString("CREATE TABLE IF NOT EXISTS admin.locks ( lock_id text PRIMARY KEY, ctime text)");
try {
ResultType result = MusicCore.nonKeyRelatedPut(pQuery, consistency);
} catch (MusicServiceException e1) {
e1.printStackTrace();
}
pQuery = new PreparedQueryObject();
pQuery.appendQueryString(
"select * from admin.locks");
try {
ResultSet rs = MusicCore.get(pQuery);
Iterator<Row> it = rs.iterator();
StringBuilder deleteKeys = new StringBuilder();
Boolean expiredKeys = false;
while (it.hasNext()) {
Row row = (Row) it.next();
String id = row.getString("lock_id");
long ctime = Long.parseLong(row.getString("ctime"));
if(System.currentTimeMillis() >= ctime + 24 * 60 * 60 * 1000) {
expiredKeys = true;
String new_id = id.substring(1);
MusicCore.deleteLock(new_id);
deleteKeys.append(id).append(",");
}
else {
MusicUtil.zkNodeMap.put(id, ctime);
}
};
if(expiredKeys) {
deleteKeys.deleteCharAt(deleteKeys.length()-1);
deleteKeysFromDB(deleteKeys);
}
} catch (MusicServiceException e) {
e.printStackTrace();
} catch (MusicLockingException e) {
e.printStackTrace();
}
//Zookeeper cleanup
scheduler.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
Iterator<Entry<String, Long>> it = MusicUtil.zkNodeMap.entrySet().iterator();
StringBuilder deleteKeys = new StringBuilder();
Boolean expiredKeys = false;
while (it.hasNext()) {
Map.Entry<String, Long> pair = (Map.Entry<String, Long>)it.next();
long ctime = pair.getValue();
if (System.currentTimeMillis() >= ctime + 24 * 60 * 60 * 1000) {
try {
expiredKeys = true;
String id = pair.getKey();
deleteKeys.append("'").append(id).append("'").append(",");
MusicCore.deleteLock(id.substring(1));
MusicUtil.zkNodeMap.remove(id);
} catch (MusicLockingException e) {
e.printStackTrace();
}
}
}
if(expiredKeys) {
deleteKeys.deleteCharAt(deleteKeys.length()-1);
deleteKeysFromDB(deleteKeys);
}
}
} , 0, 24, TimeUnit.HOURS);
}
@Override
public void contextDestroyed(ServletContextEvent event) {
scheduler.shutdownNow();
}
public void deleteKeysFromDB(StringBuilder deleteKeys) {
PreparedQueryObject pQuery = new PreparedQueryObject();
pQuery.appendQueryString(
"DELETE FROM admin.locks WHERE lock_id IN ("+deleteKeys+")");
try {
MusicCore.nonKeyRelatedPut(pQuery, "eventual");
} catch (Exception e) {
e.printStackTrace();
}
}
}
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