class.tx_dbal_querycache.php

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<?php
/***************************************************************
 *  Copyright notice
 *
 *  (c) 2010 Xavier Perseguers <typo3@perseguers.ch>
 *  All rights reserved
 *
 *  This script is part of the TYPO3 project. The TYPO3 project is
 *  free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  The GNU General Public License can be found at
 *  http://www.gnu.org/copyleft/gpl.html.
 *  A copy is found in the textfile GPL.txt and important notices to the license
 *  from the author is found in LICENSE.txt distributed with these scripts.
 *
 *
 *  This script 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 General Public License for more details.
 *
 *  This copyright notice MUST APPEAR in all copies of the script!
 ***************************************************************/


/**
 * Cache engine helper for generated queries.
 *
 * $Id$
 *
 * @author Xavier Perseguers <typo3@perseguers.ch>
 * @package TYPO3
 * @subpackage dbal
 */
class tx_dbal_querycache {

    /**
     * Initializes the caching framework by loading the cache manager and factory
     * into the global context.
     *
     * @return  void
     */
    public static function initializeCachingFramework() {
        t3lib_cache::initializeCachingFramework();
    }

    /**
     * Initializes the DBAL cache.
     *
     * @return  void
     */
    public static function initDbalCache() {
        try {
            if (is_array($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['dbal'])) {
                $backend = $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['dbal']['backend'];
                $options = $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['dbal']['options'];
            } else {
                // Transient storage, will be better than nothing
                $backend = 't3lib_cache_backend_TransientMemoryBackend';
                $options = array();
            }

            $GLOBALS['typo3CacheFactory']->create(
                'dbal',
                't3lib_cache_frontend_VariableFrontend',
                $backend,
                $options
            );
        } catch (t3lib_cache_exception_DuplicateIdentifier $e) {
            // Do nothing, a DBAL cache already exists
        }
    }

    /**
     * Returns a proper cache key.
     *
     * @param   mixed       $config
     * @return  void
     */
    public static function getCacheKey($config) {
        if (is_array($config)) {
            return md5(serialize($config));
        } else {
            return $config;
        }
    }
}

if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['ext/dbal/lib/class.tx_dbal_querycache.php'])) {
    include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['ext/dbal/lib/class.tx_dbal_querycache.php']);
}

?>