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Simple is a high performance asynchronous HTTP server for Java

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/*
 * Delegate.java May 2007
 *
 * Copyright (C) 2007, Niall Gallagher 
 *
 * This library 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.
 *
 * This library 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 library; if not, write to the 
 * Free Software Foundation, Inc., 59 Temple Place, Suite 330, 
 * Boston, MA  02111-1307  USA
 */

package org.simpleframework.http.session;

import java.util.concurrent.ConcurrentHashMap;

import org.simpleframework.util.lease.Lease;

/**
 * The LeaseSession object is used to provide a session 
 * instance that is created from a concurrent hash map. This makes 
 * use of a Lease to handle all life cycle events such
 * as canceling and renewing the lease maintaining the session.
 * 
 * @author Niall Gallagher
 */
class LeaseSession extends ConcurrentHashMap implements Session {
   
   /**
    * This is the key used to uniquely manage the session state.
    */
   private final Lease lease;
   
   /**
    * Constructor for the LeaseSession object. This will
    * create an instance using the provided lease for the session. 
    * The lease is used to handle all session life cycle events.
    * 
    * @param lease this is used to manage all the life cycle events 
    */
   public LeaseSession(Lease lease) {
      this.lease = lease;
   }

   /**
    * This is used to acquire the Lease object to control
    * the session. The lease is responsible for maintaining this map
    * within the application. Once the lease expires the session will
    * be removed and its mapped values will be available for recovery.
    * 
    * @return this returns the lease used to manage this session
    */
   public Lease getLease() {
      return lease;
   }
}