/vendor/symfony/symfony/src/Symfony/Component/Config/ResourceCheckerConfigCache.php
PHP | 168 lines | 93 code | 20 blank | 55 comment | 13 complexity | 7ede96e2528f6833ad9bc2e2b14ad5ca MD5 | raw file
Possible License(s): LGPL-2.0, Unlicense, LGPL-2.1, MPL-2.0-no-copyleft-exception, BSD-3-Clause
- <?php
- /*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * 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\Exception\IOException;
- use Symfony\Component\Filesystem\Filesystem;
- /**
- * ResourceCheckerConfigCache uses instances of ResourceCheckerInterface
- * to check whether cached data is still fresh.
- *
- * @author Matthias Pigulla <mp@webfactory.de>
- */
- class ResourceCheckerConfigCache implements ConfigCacheInterface
- {
- /**
- * @var string
- */
- private $file;
- /**
- * @var iterable|ResourceCheckerInterface[]
- */
- private $resourceCheckers;
- /**
- * @param string $file The absolute cache path
- * @param iterable|ResourceCheckerInterface[] $resourceCheckers The ResourceCheckers to use for the freshness check
- */
- public function __construct($file, $resourceCheckers = array())
- {
- $this->file = $file;
- $this->resourceCheckers = $resourceCheckers;
- }
- /**
- * {@inheritdoc}
- */
- public function getPath()
- {
- return $this->file;
- }
- /**
- * Checks if the cache is still fresh.
- *
- * This implementation will make a decision solely based on the ResourceCheckers
- * passed in the constructor.
- *
- * The first ResourceChecker that supports a given resource is considered authoritative.
- * Resources with no matching ResourceChecker will silently be ignored and considered fresh.
- *
- * @return bool true if the cache is fresh, false otherwise
- */
- public function isFresh()
- {
- if (!is_file($this->file)) {
- return false;
- }
- if (!$this->resourceCheckers) {
- return true; // shortcut - if we don't have any checkers we don't need to bother with the meta file at all
- }
- $metadata = $this->getMetaFile();
- if (!is_file($metadata)) {
- return false;
- }
- $e = null;
- $meta = false;
- $time = filemtime($this->file);
- $signalingException = new \UnexpectedValueException();
- $prevUnserializeHandler = ini_set('unserialize_callback_func', '');
- $prevErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context) use (&$prevErrorHandler, $signalingException) {
- if (E_WARNING === $type && 'Class __PHP_Incomplete_Class has no unserializer' === $msg) {
- throw $signalingException;
- }
- return $prevErrorHandler ? $prevErrorHandler($type, $msg, $file, $line, $context) : false;
- });
- try {
- $meta = unserialize(file_get_contents($metadata));
- } catch (\Error $e) {
- } catch (\Exception $e) {
- }
- restore_error_handler();
- ini_set('unserialize_callback_func', $prevUnserializeHandler);
- if (null !== $e && $e !== $signalingException) {
- throw $e;
- }
- if (false === $meta) {
- return false;
- }
- foreach ($meta as $resource) {
- /* @var ResourceInterface $resource */
- foreach ($this->resourceCheckers as $checker) {
- if (!$checker->supports($resource)) {
- continue; // next checker
- }
- if ($checker->isFresh($resource, $time)) {
- break; // no need to further check this resource
- }
- return false; // cache is stale
- }
- // no suitable checker found, ignore this resource
- }
- return true;
- }
- /**
- * Writes cache.
- *
- * @param string $content The content to write in the cache
- * @param ResourceInterface[] $metadata An array of metadata
- *
- * @throws \RuntimeException When cache file can't be written
- */
- public function write($content, array $metadata = null)
- {
- $mode = 0666;
- $umask = umask();
- $filesystem = new Filesystem();
- $filesystem->dumpFile($this->file, $content);
- try {
- $filesystem->chmod($this->file, $mode, $umask);
- } catch (IOException $e) {
- // discard chmod failure (some filesystem may not support it)
- }
- if (null !== $metadata) {
- $filesystem->dumpFile($this->getMetaFile(), serialize($metadata));
- try {
- $filesystem->chmod($this->getMetaFile(), $mode, $umask);
- } catch (IOException $e) {
- // discard chmod failure (some filesystem may not support it)
- }
- }
- if (\function_exists('opcache_invalidate') && ini_get('opcache.enable')) {
- @opcache_invalidate($this->file, true);
- }
- }
- /**
- * Gets the meta file path.
- *
- * @return string The meta file path
- */
- private function getMetaFile()
- {
- return $this->file.'.meta';
- }
- }