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<?php |
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namespace Riimu\Kit\ClassLoader; |
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/** |
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* Provides a simplified PHP file storage for the class file path cache. |
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* |
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* FileCacheClassLoader implements the CacheListClassLoader by storing the |
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* class paths in a PHP file that is loaded when the class is loaded. If changes |
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* are made to the cache, a new cache file is generated at the end of the |
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* request, instead of on every new file to reduce file writes. |
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* |
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* @author Riikka Kalliomäki <[email protected]> |
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* @copyright Copyright (c) 2014-2017 Riikka Kalliomäki |
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* @license http://opensource.org/licenses/mit-license.php MIT License |
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*/ |
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class FileCacheClassLoader extends CacheListClassLoader |
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{ |
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/** @var string Path to the cache file */ |
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private $cacheFile; |
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/** @var string[]|null Cache to store at the end of the request */ |
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private $store; |
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/** |
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* Creates new FileCacheClassLoader instance and loads the cache file. |
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* @param string $cacheFile Path to cache file |
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*/ |
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public function __construct($cacheFile) |
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{ |
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$this->store = null; |
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$this->cacheFile = $cacheFile; |
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if (file_exists($cacheFile)) { |
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$cache = include $cacheFile; |
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} |
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if (empty($cache) || !is_array($cache)) { |
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$cache = []; |
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} |
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parent::__construct($cache); |
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$this->setCacheHandler([$this, 'storeCache']); |
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} |
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/** |
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* Writes the cache file if changes were made. |
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*/ |
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public function saveCacheFile() |
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{ |
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if ($this->store !== null) { |
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file_put_contents($this->cacheFile, $this->createCache($this->store), LOCK_EX); |
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$this->store = null; |
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} |
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} |
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/** |
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* Returns the path to the cache file. |
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* @return string Path to the cache file |
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*/ |
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public function getCacheFile() |
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{ |
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return $this->cacheFile; |
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} |
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/** |
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* Stores the cache to be saved at the end of the request. |
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* @param string[] $cache Class location cache |
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*/ |
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public function storeCache(array $cache) |
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{ |
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if ($this->store === null) { |
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register_shutdown_function([$this, 'saveCacheFile']); |
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} |
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$this->store = $cache; |
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} |
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/** |
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* Creates the PHP code for the class cache. |
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* @param string[] $cache Class location cache |
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* @return string PHP code for the cache file |
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*/ |
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private function createCache(array $cache) |
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{ |
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ksort($cache); |
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$format = "\t%s => %s," . PHP_EOL; |
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$rows = []; |
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foreach ($cache as $key => $value) { |
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$rows[] = sprintf($format, var_export($key, true), var_export($value, true)); |
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} |
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return sprintf('<?php return [%s];' . PHP_EOL, PHP_EOL . implode('', $rows)); |
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} |
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} |
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Riimu /
Kit-ClassLoader
