/
HazelcastSessionManager.java
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/
HazelcastSessionManager.java
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/*
* Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
*/
package com.hazelcast.session;
import com.hazelcast.client.HazelcastClient;
import com.hazelcast.client.config.ClientConfig;
import com.hazelcast.core.EntryEvent;
import com.hazelcast.core.EntryListener;
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.IMap;
import com.hazelcast.core.MapEvent;
import org.apache.catalina.Context;
import org.apache.catalina.Lifecycle;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleState;
import org.apache.catalina.Session;
import org.apache.catalina.session.ManagerBase;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.IOException;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
public class HazelcastSessionManager extends ManagerBase implements Lifecycle, PropertyChangeListener, SessionManager {
private static final String NAME = "HazelcastSessionManager";
private static final int DEFAULT_SESSION_TIMEOUT = 60;
private static final int SECONDS_IN_MINUTE = 60;
private final Log log = LogFactory.getLog(HazelcastSessionManager.class);
private IMap<String, HazelcastSession> sessionMap;
private boolean clientOnly;
private boolean sticky = true;
private String mapName;
private boolean deferredWrite = true;
private String hazelcastInstanceName;
private HazelcastInstance instance;
public void setSessionTimeout(int t) {
getContext().setSessionTimeout(t);
}
@Override
public String getName() {
return NAME;
}
@Override
public void load() throws ClassNotFoundException, IOException {
}
@Override
public void unload() throws IOException {
}
@Override
public void startInternal() throws LifecycleException {
super.startInternal();
super.generateSessionId();
configureValves();
if (isClientOnly()) {
try {
ClientConfig clientConfig = ClientServerLifecycleListener.getConfig();
clientConfig.setClassLoader(getContext().getLoader().getClassLoader());
instance = HazelcastClient.newHazelcastClient(clientConfig);
} catch (Exception e) {
log.error("Hazelcast Client could not be created.", e);
throw new LifecycleException(e.getMessage());
}
} else if (getHazelcastInstanceName() != null) {
instance = Hazelcast.getHazelcastInstanceByName(getHazelcastInstanceName());
} else {
instance = Hazelcast.getOrCreateHazelcastInstance(P2PLifecycleListener.getConfig());
}
if (getMapName() == null || "default".equals(getMapName())) {
Context ctx = getContext();
String contextPath = ctx.getServletContext().getContextPath();
log.debug("contextPath: " + contextPath);
if (contextPath == null || contextPath.equals("/") || contextPath.equals("")) {
mapName = "empty_session_replication";
} else {
mapName = contextPath.substring(1, contextPath.length()) + "_session_replication";
}
sessionMap = instance.getMap(mapName);
} else {
sessionMap = instance.getMap(getMapName());
}
if (!isSticky()) {
sessionMap.addEntryListener(new EntryListener<String, HazelcastSession>() {
public void entryAdded(EntryEvent<String, HazelcastSession> event) {
}
public void entryRemoved(EntryEvent<String, HazelcastSession> entryEvent) {
if (entryEvent.getMember() == null || !entryEvent.getMember().localMember()) {
sessions.remove(entryEvent.getKey());
}
}
public void entryUpdated(EntryEvent<String, HazelcastSession> event) {
}
public void entryEvicted(EntryEvent<String, HazelcastSession> entryEvent) {
entryRemoved(entryEvent);
}
public void mapEvicted(MapEvent event) {
}
public void mapCleared(MapEvent event) {
}
}, false);
}
log.info("HazelcastSessionManager started...");
setState(LifecycleState.STARTING);
}
private void configureValves() {
if (isSticky()) {
HazelcastSessionChangeValve hazelcastSessionChangeValve = new HazelcastSessionChangeValve(this);
hazelcastSessionChangeValve.setAsyncSupported(true);
getContext().getPipeline().addValve(hazelcastSessionChangeValve);
}
if (isDeferredEnabled()) {
HazelcastSessionCommitValve hazelcastSessionCommitValve = new HazelcastSessionCommitValve(this);
hazelcastSessionCommitValve.setAsyncSupported(true);
getContext().getPipeline().addValve(hazelcastSessionCommitValve);
}
}
@Override
public void stopInternal() throws LifecycleException {
log.info("stopping HazelcastSessionManager...");
setState(LifecycleState.STOPPING);
if (isClientOnly()) {
instance.shutdown();
}
super.stopInternal();
log.info("HazelcastSessionManager stopped...");
}
@Override
public int getRejectedSessions() {
// Essentially do nothing.
return 0;
}
public void setRejectedSessions(int i) {
// Do nothing.
}
@Override
public Session createSession(String sessionId) {
checkMaxActiveSessions();
HazelcastSession session = (HazelcastSession) createEmptySession();
session.setNew(true);
session.setValid(true);
session.setCreationTime(System.currentTimeMillis());
session.setMaxInactiveInterval(getContext().getSessionTimeout() * SECONDS_IN_MINUTE);
String newSessionId = sessionId;
if (newSessionId == null) {
newSessionId = generateSessionId();
}
session.setId(newSessionId);
session.tellNew();
sessions.put(newSessionId, session);
sessionMap.set(newSessionId, session);
return session;
}
@Override
public Session createEmptySession() {
return new HazelcastSession(this);
}
@Override
public void add(Session session) {
sessions.put(session.getId(), (HazelcastSession) session);
sessionMap.set(session.getId(), (HazelcastSession) session);
}
@Override
public Session findSession(String id) throws IOException {
log.debug("Attempting to find sessionId: " + id);
if (id == null) {
return null;
}
if (!isSticky() || (isSticky() && !sessions.containsKey(id))) {
if (isSticky()) {
log.debug("Sticky Session is currently enabled. "
+ "Some failover occurred so reading session from Hazelcast map: " + getMapName());
}
HazelcastSession hazelcastSession = sessionMap.get(id);
if (hazelcastSession == null) {
log.debug("No Session found for: " + id);
return null;
}
log.debug("Session found for: " + id);
hazelcastSession.access();
hazelcastSession.endAccess();
hazelcastSession.setSessionManager(this);
sessions.put(id, hazelcastSession);
// call remove method to trigger eviction Listener on each node to invalidate local sessions
sessionMap.remove(id);
sessionMap.set(id, hazelcastSession);
return hazelcastSession;
} else {
return sessions.get(id);
}
}
@Override
public Session[] findSessions() {
// Get all local sessions
Set<Session> allSessions = new HashSet<Session>(sessions.values());
// Get all non-local sessions ids
Set<String> keys = new HashSet<String>(sessionMap.keySet());
keys.removeAll(sessions.keySet());
// Get all non-local sessions
final Collection<HazelcastSession> nonLocalSessions = sessionMap.getAll(keys).values();
// Set SessionManager since it's a transient field
for (HazelcastSession nonLocalSession : nonLocalSessions) {
if (nonLocalSession.getManager() == null) {
nonLocalSession.setSessionManager(this);
}
}
// Add all non-local sessions
allSessions.addAll(nonLocalSessions);
return allSessions.toArray(new Session[allSessions.size()]);
}
public void commit(Session session) {
HazelcastSession hazelcastSession = (HazelcastSession) session;
if (hazelcastSession.isDirty()) {
hazelcastSession.setDirty(false);
sessionMap.set(session.getId(), hazelcastSession);
if (log.isDebugEnabled()) {
log.debug("Thread name: " + Thread.currentThread().getName() + " committed key: " + session.getId());
}
}
}
@Override
public String updateJvmRouteForSession(String sessionId, String newJvmRoute) throws IOException {
HazelcastSession session = sessionMap.get(sessionId);
if (session == null) {
session = (HazelcastSession) createSession(null);
return session.getId();
}
if (session.getManager() == null) {
session.setSessionManager(this);
}
int index = sessionId.indexOf(".");
String baseSessionId = sessionId.substring(0, index);
String newSessionId = baseSessionId + "." + newJvmRoute;
session.setId(newSessionId);
sessionMap.remove(sessionId);
sessionMap.set(newSessionId, session);
return newSessionId;
}
@Override
public void remove(Session session) {
remove(session.getId());
log.info("Removed session: " + session.getId());
}
@Override
public void remove(Session session, boolean update) {
remove(session);
}
@Override
public IMap<String, HazelcastSession> getDistributedMap() {
return sessionMap;
}
@Override
public boolean isDeferredEnabled() {
return deferredWrite;
}
public boolean isClientOnly() {
return clientOnly;
}
public void setClientOnly(boolean clientOnly) {
this.clientOnly = clientOnly;
}
public boolean isSticky() {
return sticky;
}
public void setSticky(boolean sticky) {
if (!sticky && getJvmRoute() != null) {
log.warn("setting JvmRoute with non-sticky sessions is not recommended and might cause unstable behaivour");
}
this.sticky = sticky;
}
private void remove(String id) {
sessions.remove(id);
sessionMap.remove(id);
}
@Override
public void expireSession(String sessionId) {
super.expireSession(sessionId);
remove(sessionId);
}
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (evt.getPropertyName().equals("sessionTimeout")) {
getContext().setSessionTimeout((Integer) evt.getNewValue() * DEFAULT_SESSION_TIMEOUT);
}
}
public String getMapName() {
return mapName;
}
public void setMapName(String mapName) {
this.mapName = mapName;
}
public String getHazelcastInstanceName() {
return hazelcastInstanceName;
}
public void setHazelcastInstanceName(String hazelcastInstanceName) {
this.hazelcastInstanceName = hazelcastInstanceName;
}
private void checkMaxActiveSessions() {
if (getMaxActiveSessions() >= 0 && sessionMap.size() >= getMaxActiveSessions()) {
rejectedSessions++;
throw new IllegalStateException(sm.getString("standardManager.createSession.ise"));
}
}
public int getMaxActiveSessions() {
return this.maxActiveSessions;
}
public void setMaxActiveSessions(int maxActiveSessions) {
int oldMaxActiveSessions = this.maxActiveSessions;
this.maxActiveSessions = maxActiveSessions;
this.support.firePropertyChange("maxActiveSessions", Integer.valueOf(oldMaxActiveSessions),
Integer.valueOf(this.maxActiveSessions));
}
public void setDeferredWrite(boolean deferredWrite) {
this.deferredWrite = deferredWrite;
}
}