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<?php |
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/** |
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* Part of the Joomla Framework Cache Package |
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* |
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* @copyright Copyright (C) 2005 - 2015 Open Source Matters, Inc. All rights reserved. |
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* @license GNU General Public License version 2 or later; see LICENSE |
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*/ |
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namespace Joomla\Cache; |
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use Psr\Cache\CacheItemInterface; |
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use Joomla\Cache\Item\Item; |
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/** |
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* Runtime memory cache driver. |
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* |
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* @since 1.0 |
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*/ |
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class Runtime extends Cache |
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{ |
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/** |
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* @var \ArrayObject Database of cached items, we use ArrayObject so it can be easily |
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* passed by reference |
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* |
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* @since 2.0 |
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*/ |
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private $db; |
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/** |
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* Constructor. |
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* |
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* @param mixed $options An options array, or an object that implements \ArrayAccess |
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* |
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* @since 2.0 |
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* @throws \RuntimeException |
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*/ |
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public function __construct($options = array()) |
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{ |
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parent::__construct($options); |
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$this->db = new \ArrayObject; |
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} |
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/** |
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* This will wipe out the entire cache's keys |
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* |
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* @return boolean The result of the clear operation. |
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* |
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* @since 1.0 |
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*/ |
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public function clear() |
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{ |
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// Replace the db with a new blank array |
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$clearData = $this->db->exchangeArray(array()); |
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unset($clearData); |
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return true; |
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} |
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1 |
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/** |
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* Method to get a storage entry value from a key. |
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* |
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* @param string $key The storage entry identifier. |
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* |
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* @return CacheItemInterface |
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* |
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* @since 1.0 |
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*/ |
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public function getItem($key) |
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{ |
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$item = new Item($key); |
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try |
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{ |
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$item->set($this->db[$key]); |
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} |
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catch (\Exception $e) |
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{ |
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/** |
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* Backend caching mechanisms may throw exceptions |
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* to indicate missing data. Catch all exceptions |
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* so program flow is uninterrupted. For misses |
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* we can safely do nothing and return the |
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* CacheItem we created since it flags itself as |
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* a miss when constructed. Specific cache classes |
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* should override this method and deal with |
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* exceptions appropriately. |
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*/ |
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} |
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1 |
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return $item; |
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} |
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/** |
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* Method to remove a storage entry for a key. |
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* |
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* @param string $key The storage entry identifier. |
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* |
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* @return boolean |
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* |
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* @since 1.0 |
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*/ |
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public function deleteItem($key) |
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{ |
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$oldCache = $this->db->getArrayCopy(); |
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1 |
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if (array_key_exists($key, $oldCache)) |
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{ |
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$keyArray = array($key => $key); |
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$newCache = array_diff_key($oldCache, $keyArray); |
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$this->db->exchangeArray($newCache); |
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return true; |
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} |
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return true; |
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} |
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/** |
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* Method to set a value for a storage entry. |
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* |
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* @param CacheItemInterface $item The cache item to save. |
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* |
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* @return boolean |
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* |
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* @since 1.0 |
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*/ |
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public function save(CacheItemInterface $item) |
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{ |
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$this->db[$item->getKey()] = $item->get(); |
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return true; |
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} |
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/** |
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* Method to determine whether a storage entry has been set for a key. |
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* |
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* @param string $key The storage entry identifier. |
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* |
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* @return boolean |
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* |
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* @since 1.0 |
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*/ |
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public function hasItem($key) |
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{ |
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return array_key_exists($key, $this->db); |
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} |
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/** |
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* Test to see if the CacheItemPoolInterface is available |
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* |
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* @return boolean True on success, false otherwise |
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* |
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* @since __DEPLOY_VERSION__ |
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*/ |
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public static function isSupported() |
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{ |
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return true; |
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} |
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} |
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joomla-framework /
cache
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