/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.picketlink.identity.federation.web.core;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.HashSet;
import java.util.Set;
import java.util.Stack;
import java.util.concurrent.ConcurrentHashMap;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
import org.picketlink.identity.federation.PicketLinkLogger;
import org.picketlink.identity.federation.PicketLinkLoggerFactory;
import org.picketlink.identity.federation.web.constants.GeneralConstants;
/**
* Represents an Identity Server
*
* @author Anil.Saldhana@redhat.com
* @since Sep 17, 2009
*/
public class IdentityServer implements HttpSessionListener {
private static final PicketLinkLogger logger = PicketLinkLoggerFactory.getLogger();
// Configurable count for the active session count
private static int count = AccessController.doPrivileged(new PrivilegedAction<Integer>() {
public Integer run() {
String val = System.getProperty("identity.server.log.count", "100");
return Integer.parseInt(val);
}
});
private static int activeSessionCount = 0;
private IdentityParticipantStack stack = new STACK();
public static class STACK implements IdentityParticipantStack {
private final ConcurrentHashMap<String, Stack<String>> sessionParticipantsMap = new ConcurrentHashMap<String, Stack<String>>();
private final ConcurrentHashMap<String, Set<String>> inTransitMap = new ConcurrentHashMap<String, Set<String>>();
private final ConcurrentHashMap<String, Boolean> postBindingMap = new ConcurrentHashMap<String, Boolean>();
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#peek(java.lang.String)
*/
public String peek(String sessionID) {
Stack<String> stack = sessionParticipantsMap.get(sessionID);
if (stack != null)
return stack.peek();
return "";
}
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#pop(java.lang.String)
*/
public String pop(String sessionID) {
String result = null;
Stack<String> stack = sessionParticipantsMap.get(sessionID);
if (stack != null && stack.isEmpty() == false) {
result = stack.pop();
}
return result;
}
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#register(java.lang.String,
* java.lang.String, boolean)
*/
public void register(String sessionID, String participant, boolean postBinding) {
Stack<String> stack = sessionParticipantsMap.get(sessionID);
if (stack == null) {
stack = new Stack<String>();
sessionParticipantsMap.put(sessionID, stack);
}
if (stack.contains(participant) == false) {
stack.push(participant);
postBindingMap.put(participant, Boolean.valueOf(postBinding));
}
}
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#getParticipants(java.lang.String)
*/
public int getParticipants(String sessionID) {
Stack<String> stack = sessionParticipantsMap.get(sessionID);
if (stack != null)
return stack.size();
return 0;
}
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#registerTransitParticipant(java.lang.String,
* java.lang.String)
*/
public boolean registerTransitParticipant(String sessionID, String participant) {
Set<String> transitSet = inTransitMap.get(sessionID);
if (transitSet == null) {
transitSet = new HashSet<String>();
inTransitMap.put(sessionID, transitSet);
}
return transitSet.add(participant);
}
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#deRegisterTransitParticipant(java.lang.String,
* java.lang.String)
*/
public boolean deRegisterTransitParticipant(String sessionID, String participant) {
Set<String> transitSet = inTransitMap.get(sessionID);
if (transitSet != null) {
postBindingMap.remove(participant);
return transitSet.remove(participant);
}
return false;
}
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#getNumOfParticipantsInTransit(java.lang.String)
*/
public int getNumOfParticipantsInTransit(String sessionID) {
Set<String> transitSet = inTransitMap.get(sessionID);
if (transitSet != null)
return transitSet.size();
return 0;
}
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#getBinding(java.lang.String)
*/
public Boolean getBinding(String participant) {
return postBindingMap.get(participant);
}
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#totalSessions()
*/
public int totalSessions() {
return sessionParticipantsMap.keySet().size();
}
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#createSession(java.lang.String)
*/
public void createSession(String id) {
sessionParticipantsMap.put(id, new Stack<String>());
inTransitMap.put(id, new HashSet<String>());
}
/**
* @see org.picketlink.identity.federation.web.core.IdentityParticipantStack#removeSession(java.lang.String)
*/
public void removeSession(String id) {
sessionParticipantsMap.remove(id);
inTransitMap.remove(id);
}
}
/**
* Return the active session count
*
* @return
*/
public int getActiveSessionCount() {
return activeSessionCount;
}
/**
* Return a reference to the internal stack
*
* @return
*/
public IdentityParticipantStack stack() {
return stack;
}
/**
* Set a custom instance of the {@link IdentityParticipantStack}
*
* @param theStack
*/
public void setStack(IdentityParticipantStack theStack) {
this.stack = theStack;
}
/**
* @see HttpSessionListener#sessionCreated(HttpSessionEvent)
*/
public void sessionCreated(HttpSessionEvent sessionEvent) {
activeSessionCount++;
if (activeSessionCount % count == 0)
logger.samlIdentityServerActiveSessionCount(activeSessionCount);
HttpSession session = sessionEvent.getSession();
logger.samlIdentityServerSessionCreated(session.getId(), activeSessionCount);
// Ensure that the IdentityServer instance is set on the servlet context
ServletContext servletContext = session.getServletContext();
IdentityServer idserver = (IdentityServer) servletContext.getAttribute(GeneralConstants.IDENTITY_SERVER);
if (idserver == null) {
idserver = this;
servletContext.setAttribute(GeneralConstants.IDENTITY_SERVER, this);
}
if (idserver != this)
throw logger.notEqualError(idserver.toString(), this.toString());
String id = sessionEvent.getSession().getId();
stack.createSession(id);
}
/**
* @see HttpSessionListener#sessionDestroyed(HttpSessionEvent)
*/
public void sessionDestroyed(HttpSessionEvent sessionEvent) {
--activeSessionCount;
String id = sessionEvent.getSession().getId();
logger.samlIdentityServerSessionDestroyed(id, activeSessionCount);
stack.removeSession(id);
}
}