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HazelcastManager.java
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HazelcastManager.java
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package org.appng.tomcat.session.hazelcast.v2;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Arrays;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleState;
import org.apache.catalina.Session;
import org.apache.catalina.session.ManagerBase;
import org.apache.catalina.session.StandardSession;
import org.apache.juli.logging.Log;
import org.appng.tomcat.session.SessionData;
import org.appng.tomcat.session.Utils;
import org.appng.tomcat.session.hazelcast.HazelCastSession;
import com.hazelcast.config.ClasspathXmlConfig;
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.map.IMap;
public class HazelcastManager extends ManagerBase {
private final Log log = Utils.getLog(HazelcastManager.class);
private String configFile = "WEB-INF/classes/hazelcast.xml";
private String mapName = "tomcat.sessions";
private HazelcastInstance instance;
@Override
protected void startInternal() throws LifecycleException {
super.startInternal();
ClasspathXmlConfig config = new ClasspathXmlConfig(configFile);
instance = Hazelcast.getOrCreateHazelcastInstance(config);
log.info(String.format("Loaded %s from %s", instance, configFile));
setState(LifecycleState.STARTING);
}
@Override
protected void stopInternal() throws LifecycleException {
super.stopInternal();
setState(LifecycleState.STOPPING);
}
@Override
public void processExpires() {
long timeNow = System.currentTimeMillis();
Session sessions[] = findSessions();
AtomicInteger expireHere = new AtomicInteger(0);
Arrays.asList(sessions).stream().filter(s -> !(s == null || s.isValid()))
.forEach(s -> expireHere.getAndIncrement());
long duration = System.currentTimeMillis() - timeNow;
if (log.isDebugEnabled()) {
log.debug(String.format("Expired %d of %d sessions in %dms.", expireHere.intValue(), sessions.length,
duration));
}
processingTime += duration;
}
@Override
public HazelCastSession createEmptySession() {
return new HazelCastSession(this);
}
@Override
public HazelCastSession createSession(String sessionId) {
return (HazelCastSession) super.createSession(sessionId);
}
public boolean commit(Session session) throws IOException {
long start = System.currentTimeMillis();
if (((HazelCastSession) session).isDirty()) {
try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(bos)) {
((HazelCastSession) session).setClean();
((HazelCastSession) session).writeObjectData(oos);
String site = Utils.getSiteName(session.getSession());
SessionData sessionData = new SessionData(session.getId(), site, bos.toByteArray());
getPersistentSessions().set(session.getId(), sessionData);
if (log.isDebugEnabled()) {
log.debug(String.format("Saved %s in %dms", sessionData, System.currentTimeMillis() - start));
}
return true;
}
}
return false;
}
@Override
public HazelCastSession findSession(String id) throws IOException {
HazelCastSession session = (HazelCastSession) super.findSession(id);
if (null == session) {
long start = System.currentTimeMillis();
// the calls are performed in a pessimistic lock block to prevent concurrency problems whilst finding
// sessions
getPersistentSessions().lock(id);
try {
SessionData sessionData = getPersistentSessions().get(id);
if (null == sessionData) {
if (log.isDebugEnabled()) {
log.debug(String.format("Session %s not found in map %s", id, mapName));
}
} else {
try (ByteArrayInputStream is = new ByteArrayInputStream(sessionData.getData());
ObjectInputStream ois = Utils.getObjectInputStream(is, sessionData.getSite(),
getContext())) {
session = createEmptySession();
((StandardSession) session).readObjectData(ois);
session.access();
session.endAccess();
session.setClean();
if (log.isDebugEnabled()) {
log.debug(String.format("Loaded %s in %dms", sessionData,
System.currentTimeMillis() - start));
}
add(session);
} catch (ClassNotFoundException e) {
log.error("Error loading session" + id, e);
}
}
} finally {
getPersistentSessions().unlock(id);
}
} else {
session.access();
session.endAccess();
}
return session;
}
@Override
public void add(Session session) {
super.add(session);
log.debug(String.format("Added %s", session.getId()));
}
/**
* Remove this Session from the active Sessions, but not from the distributed {@link IMap}.
*
* @param session
* Session to be removed
*/
void removeLocal(Session session) {
if (session.getIdInternal() != null) {
sessions.remove(session.getIdInternal());
}
}
@Override
public void remove(Session session, boolean update) {
super.remove(session, update);
getPersistentSessions().remove(session.getId());
log.debug(String.format("Removed %s (update: %s)", session.getId(), update));
}
IMap<String, SessionData> getPersistentSessions() {
return instance.getMap(mapName);
}
public void setConfigFile(String configFile) {
this.configFile = configFile;
}
public void setMapName(String mapName) {
this.mapName = mapName;
}
@Override
public void load() throws ClassNotFoundException, IOException {
// don't load all sessions when starting
}
@Override
public void unload() throws IOException {
// don't save all sessions when stopping
}
}