How is `Cm_Cache_Backend_File` configured as the backend for `Zend_Cache_Core`?

dmitry_fedyuk · March 13, 2024, 3:52pm

1. Magento\Framework\App\Cache\Frontend\Pool::get()

magento/magento2/blob/2.4.7-beta3/lib/internal/Magento/Framework/App/Cache/Frontend/Pool.php#L147-L156


      
          /**
           * Retrieve frontend instance by its unique identifier
           *
           * @param string $identifier Cache frontend identifier
           * @return \Magento\Framework\Cache\FrontendInterface Cache frontend instance
           * @throws \InvalidArgumentException
           */
          public function get($identifier)
          {
              $this->_initialize();

2. Magento\Framework\App\Cache\Frontend\Pool::_initialize()

github.com

magento/magento2/blob/2.4.7-beta3/lib/internal/Magento/Framework/App/Cache/Frontend/Pool.php#L57-L72


      
          /**
           * Create instances of every cache frontend known to the system.
           *
           * Method is to be used for delayed initialization of the iterator.
           *
           * @return void
           */
          protected function _initialize()
          {
              if ($this->_instances === null) {
                  $this->_instances = [];
                  foreach ($this->_getCacheSettings() as $frontendId => $frontendOptions) {
                      $this->_instances[$frontendId] = $this->_factory->create($frontendOptions);
                  }
              }
          }

2.1. How does `Magento\Framework\App\Cache\Frontend\Pool::_getCacheSettings()` work?

3. Magento\Framework\App\Cache\Frontend\Factory::create()

github.com

magento/magento2/blob/2.4.7-beta3/lib/internal/Magento/Framework/App/Cache/Frontend/Factory.php#L146-L146


      
          $backend = $this->_getBackendOptions($options);

4. Magento\Framework\App\Cache\Frontend\Factory::_getBackendOptions()

4.1.

github.com

magento/magento2/blob/2.4.7-beta3/lib/internal/Magento/Framework/App/Cache/Frontend/Factory.php#L233-L233


      
          $type = isset($cacheOptions['backend']) ? $cacheOptions['backend'] : $this->_defaultBackend;

4.1.1.

github.com

magento/magento2/blob/2.4.7-beta3/lib/internal/Magento/Framework/App/Cache/Frontend/Factory.php#L72-L77


      
          /**
           * Default cache backend type
           *
           * @var string
           */
          protected $_defaultBackend = 'Cm_Cache_Backend_File';

How is `Cm_Cache_Backend_File` configured as the backend for `Zend_Cache_Core`?

1. Magento\Framework\App\Cache\Frontend\Pool::get()

2. Magento\Framework\App\Cache\Frontend\Pool::_initialize()

2.1. How does Magento\Framework\App\Cache\Frontend\Pool::_getCacheSettings() work?

3. Magento\Framework\App\Cache\Frontend\Factory::create()

4. Magento\Framework\App\Cache\Frontend\Factory::_getBackendOptions()

4.1.

4.1.1.

2.1. How does `Magento\Framework\App\Cache\Frontend\Pool::_getCacheSettings()` work?