/**
* Constructor creates cache driver by name. Parameters for
* the specific driver may be deployed by the second argument.
*
* @param string|false The name of the driver
* @return void
*
* TODO normalize case-sensitive names
*/
private function __construct($name = null, array $params = null)
{
// load configuration
if (self::$conf === null) {
// default configuration
self::$conf = array('Cache_Lite' => array('cacheDir' => VIVVO_FS_INSTALL_ROOT . 'cache/', 'lifeTime' => null, 'automaticSerialization' => true, 'errorHandlingAPIBreak' => true, 'group' => 'vivvo_cache'), 'SQLite' => array('file' => VIVVO_FS_INSTALL_ROOT . 'cache/sqlite.db', 'schema' => 'CREATE TABLE cache(
id VARCHAR(100) PRIMARY KEY,
tags VARCHAR(255),
lifetime INTEGER,
data TEXT);'), 'MySQL' => array('host' => VIVVO_DB_HOST, 'username' => VIVVO_DB_USER, 'password' => VIVVO_DB_PASSWORD, 'database' => VIVVO_DB_DATABASE, 'data_table' => VIVVO_DB_PREFIX . 'cache', 'tags_table' => VIVVO_DB_PREFIX . 'cache_tags'));
if (defined('VIVVO_SYSTEM_CACHE_DRIVER_PARAMS')) {
self::$conf = array_merge(self::$conf, json_decode(VIVVO_SYSTEM_CACHE_DRIVER_PARAMS, true));
}
}
$name = $name === null ? VIVVO_SYSTEM_CACHE_DRIVER : trim($name);
$driver = 'vivvo_cache_' . $name;
$file = VIVVO_FS_CACHE_DRIVER . $name . '.php';
if (!file_exists($file)) {
throw new CacheDriverException($driver, 'Driver file could not be found.');
}
require_once $file;
// Passed params overwrites those in conf.cache.php since they are on-demand
$params = $params !== null ? array_merge(self::$conf[$name], $params) : self::$conf[$name];
is_array($params) or $params = array();
// Create our cache driver
self::$drivers[$name] = new $driver($params);
if (!self::$drivers[$name] instanceof vivvo_cache_driver) {
throw new CacheDriverException($driver, 'Driver class does not implement vivvo_cache_driver interface.');
}
}
