Viewing file:  CacheFactory.php (2.48 KB) -rw-r--r--
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<?php
/**
* This file is part of CodeIgniter 4 framework.
*
* (c) CodeIgniter Foundation <admin@codeigniter.com>
*
* For the full copyright and license information, please view
* the LICENSE file that was distributed with this source code.
*/
namespace CodeIgniter\Cache;
use CodeIgniter\Cache\Exceptions\CacheException;
use CodeIgniter\Exceptions\CriticalError;
use CodeIgniter\Test\Mock\MockCache;
use Config\Cache;
/**
* A factory for loading the desired
*/
class CacheFactory
{
/**
* The class to use when mocking
*
* @var string
*/
public static $mockClass = MockCache::class;
/**
* The service to inject the mock as
*
* @var string
*/
public static $mockServiceName = 'cache';
/**
* Attempts to create the desired cache handler, based upon the
*
* @return CacheInterface
*/
public static function getHandler(Cache $config, ?string $handler = null, ?string $backup = null)
{
if (! isset($config->validHandlers) || ! is_array($config->validHandlers)) {
throw CacheException::forInvalidHandlers();
}
if (! isset($config->handler) || ! isset($config->backupHandler)) {
throw CacheException::forNoBackup();
}
$handler = ! empty($handler) ? $handler : $config->handler;
$backup = ! empty($backup) ? $backup : $config->backupHandler;
if (! array_key_exists($handler, $config->validHandlers) || ! array_key_exists($backup, $config->validHandlers)) {
throw CacheException::forHandlerNotFound();
}
$adapter = new $config->validHandlers[$handler]($config);
if (! $adapter->isSupported()) {
$adapter = new $config->validHandlers[$backup]($config);
if (! $adapter->isSupported()) {
// Fall back to the dummy adapter.
$adapter = new $config->validHandlers['dummy']();
}
}
// If $adapter->initialization throws a CriticalError exception, we will attempt to
// use the $backup handler, if that also fails, we resort to the dummy handler.
try {
$adapter->initialize();
} catch (CriticalError $e) {
log_message('critical', $e->getMessage() . ' Resorting to using ' . $backup . ' handler.');
// get the next best cache handler (or dummy if the $backup also fails)
$adapter = self::getHandler($config, $backup, 'dummy');
}
return $adapter;
}
}
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