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Ehcache is an open source, standards-based cache used to boost performance,
offload the database and simplify scalability. Ehcache is robust, proven and full-featured and
this has made it the most widely-used Java-based cache.
//
// ========================================================================
// Copyright (c) 1995-2012 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.server.session;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.eclipse.jetty.server.SessionIdManager;
/* ------------------------------------------------------------ */
/**
* HashSessionIdManager. An in-memory implementation of the session ID manager.
*/
public class HashSessionIdManager extends AbstractSessionIdManager
{
private final Map>> _sessions = new HashMap>>();
/* ------------------------------------------------------------ */
public HashSessionIdManager()
{
}
/* ------------------------------------------------------------ */
public HashSessionIdManager(Random random)
{
super(random);
}
/* ------------------------------------------------------------ */
/**
* @return Collection of String session IDs
*/
public Collection getSessions()
{
return Collections.unmodifiableCollection(_sessions.keySet());
}
/* ------------------------------------------------------------ */
/**
* @return Collection of Sessions for the passed session ID
*/
public Collection getSession(String id)
{
ArrayList sessions = new ArrayList();
Set> refs =_sessions.get(id);
if (refs!=null)
{
for (WeakReference ref: refs)
{
HttpSession session = ref.get();
if (session!=null)
sessions.add(session);
}
}
return sessions;
}
/* ------------------------------------------------------------ */
/** Get the session ID with any worker ID.
*
* @param clusterId
* @param request
* @return sessionId plus any worker ID.
*/
public String getNodeId(String clusterId,HttpServletRequest request)
{
// used in Ajp13Parser
String worker=request==null?null:(String)request.getAttribute("org.eclipse.jetty.ajp.JVMRoute");
if (worker!=null)
return clusterId+'.'+worker;
if (_workerName!=null)
return clusterId+'.'+_workerName;
return clusterId;
}
/* ------------------------------------------------------------ */
/** Get the session ID without any worker ID.
*
* @param nodeId the node id
* @return sessionId without any worker ID.
*/
public String getClusterId(String nodeId)
{
int dot=nodeId.lastIndexOf('.');
return (dot>0)?nodeId.substring(0,dot):nodeId;
}
/* ------------------------------------------------------------ */
@Override
protected void doStart() throws Exception
{
super.doStart();
}
/* ------------------------------------------------------------ */
@Override
protected void doStop() throws Exception
{
_sessions.clear();
super.doStop();
}
/* ------------------------------------------------------------ */
/**
* @see SessionIdManager#idInUse(String)
*/
public boolean idInUse(String id)
{
synchronized (this)
{
return _sessions.containsKey(id);
}
}
/* ------------------------------------------------------------ */
/**
* @see SessionIdManager#addSession(HttpSession)
*/
public void addSession(HttpSession session)
{
String id = getClusterId(session.getId());
WeakReference ref = new WeakReference(session);
synchronized (this)
{
Set> sessions = _sessions.get(id);
if (sessions==null)
{
sessions=new HashSet>();
_sessions.put(id,sessions);
}
sessions.add(ref);
}
}
/* ------------------------------------------------------------ */
/**
* @see SessionIdManager#removeSession(HttpSession)
*/
public void removeSession(HttpSession session)
{
String id = getClusterId(session.getId());
synchronized (this)
{
Collection> sessions = _sessions.get(id);
if (sessions!=null)
{
for (Iterator> iter = sessions.iterator(); iter.hasNext();)
{
WeakReference ref = iter.next();
HttpSession s=ref.get();
if (s==null)
{
iter.remove();
continue;
}
if (s==session)
{
iter.remove();
break;
}
}
if (sessions.isEmpty())
_sessions.remove(id);
}
}
}
/* ------------------------------------------------------------ */
/**
* @see SessionIdManager#invalidateAll(String)
*/
public void invalidateAll(String id)
{
Collection> sessions;
synchronized (this)
{
sessions = _sessions.remove(id);
}
if (sessions!=null)
{
for (WeakReference ref: sessions)
{
AbstractSession session=(AbstractSession)ref.get();
if (session!=null && session.isValid())
session.invalidate();
}
sessions.clear();
}
}
}