* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Config; use Symfony\Component\Config\Resource\ResourceInterface; use Symfony\Component\Filesystem\Filesystem; /** * ConfigCache manages PHP cache files. * * When debug is enabled, it knows when to flush the cache * thanks to an array of ResourceInterface instances. * * @author Fabien Potencier */ class ConfigCache { private $debug; private $file; /** * Constructor. * * @param string $file The absolute cache path * @param Boolean $debug Whether debugging is enabled or not */ public function __construct($file, $debug) { $this->file = $file; $this->debug = (Boolean) $debug; } /** * Gets the cache file path. * * @return string The cache file path */ public function __toString() { return $this->file; } /** * Checks if the cache is still fresh. * * This method always returns true when debug is off and the * cache file exists. * * @return Boolean true if the cache is fresh, false otherwise */ public function isFresh() { if (!is_file($this->file)) { return false; } if (!$this->debug) { return true; } $metadata = $this->getMetaFile(); if (!is_file($metadata)) { return false; } $time = filemtime($this->file); $meta = unserialize(file_get_contents($metadata)); foreach ($meta as $resource) { if (!$resource->isFresh($time)) { return false; } } return true; } /** * Writes cache. * * @param string $content The content to write in the cache * @param ResourceInterface[] $metadata An array of ResourceInterface instances * * @throws \RuntimeException When cache file can't be wrote */ public function write($content, array $metadata = null) { $mode = 0666 & ~umask(); $filesystem = new Filesystem(); $filesystem->dumpFile($this->file, $content, null); @chmod($this->file, $mode); if (null !== $metadata && true === $this->debug) { $filesystem->dumpFile($this->getMetaFile(), serialize($metadata), null); @chmod($this->getMetaFile(), $mode); } } /** * Gets the meta file path. * * @return string The meta file path */ private function getMetaFile() { return $this->file.'.meta'; } }