Cache.php

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<?php
namespace TYPO3\CMS\Core\Cache;

use TYPO3\CMS\Core\Utility\GeneralUtility;

class Cache {

    static protected $isCachingFrameworkInitialized = FALSE;

    static protected $cacheManager;

    static protected $cacheFactory;

    static public function initializeCachingFramework() {
        if (!self::isCachingFrameworkInitialized()) {
            // New operator used on purpose, makeInstance() is not ready to be used so early in bootstrap
            self::$cacheManager = new CacheManager();
            GeneralUtility::setSingletonInstance('TYPO3\\CMS\\Core\\Cache\\CacheManager', self::$cacheManager);
            self::$cacheManager->setCacheConfigurations($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']);
            // New operator used on purpose, makeInstance() is not ready to be used so early in bootstrap
            self::$cacheFactory = new CacheFactory('production', self::$cacheManager);
            GeneralUtility::setSingletonInstance('TYPO3\\CMS\\Core\\Cache\\CacheFactory', self::$cacheFactory);
            self::$isCachingFrameworkInitialized = TRUE;
        }
        return self::$cacheManager;
    }

    static public function isCachingFrameworkInitialized() {
        return self::$isCachingFrameworkInitialized;
    }

    static public function flagCachingFrameworkForReinitialization() {
        self::$isCachingFrameworkInitialized = FALSE;
        GeneralUtility::removeSingletonInstance('TYPO3\\CMS\\Core\\Cache\\CacheManager', self::$cacheManager);
        GeneralUtility::removeSingletonInstance('TYPO3\\CMS\\Core\\Cache\\CacheFactory', self::$cacheFactory);
        self::$cacheManager = NULL;
        self::$cacheFactory = NULL;
    }

    static public function getDatabaseTableDefinitions() {
        $tableDefinitions = '';
        foreach ($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations'] as $cacheName => $_) {
            $backend = self::$cacheManager->getCache($cacheName)->getBackend();
            if (method_exists($backend, 'getTableDefinitions')) {
                $tableDefinitions .= LF . $backend->getTableDefinitions();
            }
        }
        return $tableDefinitions;
    }

    public function addCachingFrameworkRequiredDatabaseSchemaToTablesDefinition(array $sqlString, $extensionKey) {
        self::$cacheManager->setCacheConfigurations($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']);
        $sqlString[] = static::getDatabaseTableDefinitions();
        return array('sqlString' => $sqlString, 'extensionKey' => $extensionKey);
    }

}