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//
//  ========================================================================
//  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;

import java.util.Set;

import javax.servlet.http.HttpServletRequest;

import org.eclipse.jetty.server.session.SessionHandler;
import org.eclipse.jetty.server.session.HouseKeeper;
import org.eclipse.jetty.util.component.LifeCycle;

/** 
 * Session ID Manager.
 * 
 * Manages session IDs across multiple contexts.
 */
public interface SessionIdManager extends LifeCycle
{
    /* ------------------------------------------------------------ */
    /**
     * @param id The plain session ID (ie no workername extension)
     * @return True if the session ID is in use by at least one context.
     */
    public boolean isIdInUse(String id);

    
    /* ------------------------------------------------------------ */
    /**
     * Expire all sessions on all contexts that share the same id.
     * 
     * @param id The session ID without any cluster node extension
     */
    public void expireAll(String id);
    
    
    /* ------------------------------------------------------------ */
    /**
     * Invalidate all sessions on all contexts that share the same id.
     * 
     * @param id the session id
     */
    public void invalidateAll (String id);
    
    
    /* ------------------------------------------------------------ */
    /**
     * Create a new Session ID.
     * 
     * @param request the request with the sesion
     * @param created the timestamp for when the session was created
     * @return the new session id
     */
    public String newSessionId(HttpServletRequest request,long created);
    
    
    /* ------------------------------------------------------------ */
    /** 
     * @return the unique name of this server instance
     */
    public String getWorkerName();
    
    
    /* ------------------------------------------------------------ */
    /** Get just the session id from an id that includes the worker name
     * as a suffix.
     * 
     * Strip node identifier from a located session ID.
     * @param qualifiedId the session id including the worker name
     * @return the cluster id
     */
    public String getId(String qualifiedId);
    
    
    
    /* ------------------------------------------------------------ */
    /** Get an extended id for a session. An extended id contains
     * the workername as a suffix.
     * 
     * @param id The id of the session
     * @param request The request that for the session (or null)
     * @return The session id qualified with the worker name
     */
    public String getExtendedId(String id,HttpServletRequest request);
    
    
    /* ------------------------------------------------------------ */
    /** Change the existing session id.
    * 
    * @param oldId the old plain session id
    * @param oldExtendedId the old fully qualified id
    * @param request the request containing the session
    * @return the new session id
    */
    public String renewSessionId(String oldId, String oldExtendedId, HttpServletRequest request);    

    /* ------------------------------------------------------------ */
    /**
     * Get the set of all session handlers for this node
     * @return the set of session handlers
     */
    public  Set getSessionHandlers();
    
    
    /**
     * @param houseKeeper the housekeeper for doing scavenging
     */
    public void setSessionHouseKeeper (HouseKeeper houseKeeper);
    
    /**
     * @return the housekeeper for doing scavenging
     */
    public HouseKeeper getSessionHouseKeeper();
    
}