RuntimeMemory.class.php

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<?php
/***************************************************************************
 *   Copyright (C) 2005-2008 by Konstantin V. Arkhipov                     *
 *                                                                         *
 *   This program 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 3 of the    *
 *   License, or (at your option) any later version.                       *
 *                                                                         *
 ***************************************************************************/
/* $Id: RuntimeMemory.class.php 5701 2008-12-31 16:02:05Z voxus $ */

    final class RuntimeMemory extends CachePeer
    {
        private $cache = array();
        
        public static function create()
        {
            return new self;
        }
        
        public function isAlive()
        {
            return true;
        }
        
        public function increment($key, $value)
        {
            if (isset($this->cache[$key]))
                return $this->cache[$key] += $value;
            
            return null;
        }
        
        public function decrement($key, $value)
        {
            if (isset($this->cache[$key]))
                return $this->cache[$key] -= $value;
            
            return null;
        }
        
        public function get($key)
        {
            if (isset($this->cache[$key]))
                return $this->cache[$key];
            
            return null;
        }
        
        public function delete($key)
        {
            if (isset($this->cache[$key])) {
                unset($this->cache[$key]);
                return true;
            }
            
            return false;
        }
        
        public function clean()
        {
            $this->cache = array();
            
            return parent::clean();
        }
        
        public function append($key, $data)
        {
            if (isset($this->cache[$key])) {
                $this->cache[$key] .= $data;
                return true;
            }
            
            return false;
        }
        
        protected function store($action, $key, $value, $expires = 0)
        {
            if ($action == 'add' && isset($this->cache[$key]))
                return true;
            elseif ($action == 'replace' && !isset($this->cache[$key]))
                return false;
            
            if (is_object($value))
                $this->cache[$key] = clone $value;
            else
                $this->cache[$key] = $value;
            
            return true;
        }
    }
?>