org.eclipse.jetty.server.session.HashSessionIdManager Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2018 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;
/* ------------------------------------------------------------ */
/**
* 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;
}
/* ------------------------------------------------------------ */
@Override
protected void doStart() throws Exception
{
super.doStart();
}
/* ------------------------------------------------------------ */
@Override
protected void doStop() throws Exception
{
_sessions.clear();
super.doStop();
}
/* ------------------------------------------------------------ */
/**
* @see SessionIdManager#idInUse(String)
*/
@Override
public boolean idInUse(String id)
{
synchronized (this)
{
return _sessions.containsKey(id);
}
}
/* ------------------------------------------------------------ */
/**
* @see SessionIdManager#addSession(HttpSession)
*/
@Override
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)
*/
@Override
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)
*/
@Override
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();
}
}
/* ------------------------------------------------------------ */
@Override
public void renewSessionId (String oldClusterId, String oldNodeId, HttpServletRequest request)
{
//generate a new id
String newClusterId = newSessionId(request.hashCode());
synchronized (this)
{
Set> sessions = _sessions.remove(oldClusterId); //get the list of sessions with same id from other contexts
if (sessions!=null)
{
for (Iterator> iter = sessions.iterator(); iter.hasNext();)
{
WeakReference ref = iter.next();
HttpSession s = ref.get();
if (s == null)
{
continue;
}
else
{
if (s instanceof AbstractSession)
{
AbstractSession abstractSession = (AbstractSession)s;
abstractSession.getSessionManager().renewSessionId(oldClusterId, oldNodeId, newClusterId, getNodeId(newClusterId, request));
}
}
}
_sessions.put(newClusterId, sessions);
}
}
}
}