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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\App\Cache\Type;
use Magento\Framework\App\Cache\Frontend\Pool;
use Magento\Framework\App\DeploymentConfig;
/**
* In-memory readonly pool of cache front-ends with enforced access control, specific to cache types
*
* @api
* @since 100.0.2
*/
class FrontendPool
{
/**
* Array key for cache type
*/
const KEY_CACHE_TYPE = 'type';
/**
* Array key for cache frontend
*/
const KEY_FRONTEND_CACHE = 'frontend';
/**
* Config key for cache
*/
const KEY_CACHE = 'cache';
/**
* @var \Magento\Framework\ObjectManagerInterface
*/
private $_objectManager;
/**
* @var \Magento\Framework\App\DeploymentConfig
*/
private $deploymentConfig;
/**
* @var \Magento\Framework\App\Cache\Frontend\Pool
*/
private $_frontendPool;
/**
* @var array
*/
private $_typeFrontendMap;
/**
* @var \Magento\Framework\Cache\FrontendInterface[]
*/
private $_instances = [];
/**
* @param \Magento\Framework\ObjectManagerInterface $objectManager
* @param \Magento\Framework\App\DeploymentConfig $deploymentConfig
* @param \Magento\Framework\App\Cache\Frontend\Pool $frontendPool
* @param array $typeFrontendMap Format: array('<cache_type_id>' => '<cache_frontend_id>', ...)
*/
public function __construct(
\Magento\Framework\ObjectManagerInterface $objectManager,
\Magento\Framework\App\DeploymentConfig $deploymentConfig,
\Magento\Framework\App\Cache\Frontend\Pool $frontendPool,
array $typeFrontendMap = []
) {
$this->_objectManager = $objectManager;
$this->deploymentConfig = $deploymentConfig;
$this->_frontendPool = $frontendPool;
$this->_typeFrontendMap = $typeFrontendMap;
}
/**
* Retrieve cache frontend instance by a cache type identifier, enforcing identifier-scoped access control
*
* @param string $cacheType Cache type identifier
* @return \Magento\Framework\Cache\FrontendInterface Cache frontend instance
*/
public function get($cacheType)
{
if (!isset($this->_instances[$cacheType])) {
$frontendId = $this->_getCacheFrontendId($cacheType);
$frontendInstance = $this->_frontendPool->get($frontendId);
/** @var $frontendInstance AccessProxy */
$frontendInstance = $this->_objectManager->create(
\Magento\Framework\App\Cache\Type\AccessProxy::class,
['frontend' => $frontendInstance, 'identifier' => $cacheType]
);
$this->_instances[$cacheType] = $frontendInstance;
}
return $this->_instances[$cacheType];
}
/**
* Retrieve cache frontend identifier, associated with a cache type
*
* @param string $cacheType
* @return string
*/
protected function _getCacheFrontendId($cacheType)
{
$result = null;
$cacheInfo = $this->deploymentConfig->getConfigData(self::KEY_CACHE);
if (null !== $cacheInfo) {
$result = isset($cacheInfo[self::KEY_CACHE_TYPE][$cacheType][self::KEY_FRONTEND_CACHE]) ?
$cacheInfo[self::KEY_CACHE_TYPE][$cacheType][self::KEY_FRONTEND_CACHE] : null;
}
if (!$result) {
if (isset($this->_typeFrontendMap[$cacheType])) {
$result = $this->_typeFrontendMap[$cacheType];
} else {
$result = \Magento\Framework\App\Cache\Frontend\Pool::DEFAULT_FRONTEND_ID;
}
}
return $result;
}
}