/**
* Returns an instance of the cache_factor method.
*
* @param bool $forcereload If set to true a new cache_factory instance will be created and used.
* @return cache_factory
*/
public static function instance($forcereload = false)
{
global $CFG;
if ($forcereload || self::$instance === null) {
// Initialise a new factory to facilitate our needs.
if (defined('CACHE_DISABLE_ALL') && CACHE_DISABLE_ALL !== false) {
// The cache has been disabled. Load disabledlib and start using the factory designed to handle this
// situation. It will use disabled alternatives where available.
require_once $CFG->dirroot . '/cache/disabledlib.php';
self::$instance = new cache_factory_disabled();
} else {
if (defined('PHPUNIT_TEST') && PHPUNIT_TEST) {
// We're using the regular factory.
require_once $CFG->dirroot . '/cache/tests/fixtures/lib.php';
self::$instance = new cache_phpunit_factory();
if (defined('CACHE_DISABLE_STORES') && CACHE_DISABLE_STORES !== false) {
// The cache stores have been disabled.
self::$instance->set_state(self::STATE_STORES_DISABLED);
}
} else {
// We're using the regular factory.
self::$instance = new cache_factory();
if (defined('CACHE_DISABLE_STORES') && CACHE_DISABLE_STORES !== false) {
// The cache stores have been disabled.
self::$instance->set_state(self::STATE_STORES_DISABLED);
}
}
}
}
return self::$instance;
}
