Last active
March 12, 2020 15:35
-
-
Save whyvrafvr/0f80bc38e0a4da102cfb06c6420baf4a to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* | |
* To change this license header, choose License Headers in Project Properties. | |
* To change this template file, choose Tools | Templates | |
* and open the template in the editor. | |
*/ | |
package fr.trendev.controllers; | |
import com.hazelcast.config.MapConfig; | |
import com.hazelcast.core.IMap; | |
import fr.trendev.controllers.qualifiers.HazelcastDistributedMap; | |
import java.util.Collections; | |
import java.util.LinkedList; | |
import java.util.List; | |
import java.util.concurrent.locks.Lock; | |
import java.util.logging.Level; | |
import java.util.logging.Logger; | |
import javax.annotation.PostConstruct; | |
import javax.annotation.PreDestroy; | |
import javax.enterprise.context.ApplicationScoped; | |
/** | |
* | |
* @author jsie | |
*/ | |
@ApplicationScoped | |
@HazelcastDistributedMap | |
public class HazelcastDistributedMapRecordsManager extends HazelcastAbstractRecordsManager { | |
private IMap<String, LinkedList<String>> map; | |
private static final Logger LOG = Logger.getLogger(HazelcastDistributedMapRecordsManager.class.getName()); | |
public HazelcastDistributedMapRecordsManager() { | |
super(); | |
String mapConfigName = this.getClass().getName(); | |
MapConfig mc = hz.getConfig().getMapConfigOrNull(mapConfigName); | |
if (mc == null) { | |
mc = new MapConfig(mapConfigName) | |
.setBackupCount(MapConfig.MAX_BACKUP_COUNT); | |
hz.getConfig().addMapConfig(mc); | |
} | |
this.map = hz.getMap(mapConfigName); | |
} | |
@PostConstruct | |
@Override | |
public void init() { | |
super.init(); | |
LOG.log(Level.WARNING, "{0} is now initialized", this.getClass().getSimpleName()); | |
} | |
@PreDestroy | |
@Override | |
public void close() { | |
LOG.log(Level.WARNING, "Destroying {0}", this.getClass().getSimpleName()); | |
} | |
@Override | |
public List<String> add(String value) { | |
LinkedList<String> records = new LinkedList<>(); | |
// replace with FencedLock when CP system will be enabled | |
Lock hzLock = hz.getLock(this.getClass().getName()); | |
hzLock.lock(); | |
try { | |
records = this.map.getOrDefault(key, new LinkedList<>()); | |
//pop old entries | |
if (records.size() >= maxSize) { | |
while (records.size() != maxSize - 1) { | |
records.remove(); | |
} | |
} | |
records.add(value); | |
this.map.put(key, records); | |
} finally { | |
hzLock.unlock(); | |
} | |
return Collections.unmodifiableList(records); | |
} | |
@Override | |
public String getType() { | |
return RecordsManagerProducer.HAZELCAST_DISTRIBUTED_MAP; | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment