Viewing file:  FilesystemTagAwareAdapter.php (4.51 KB) -rw-r--r--
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<?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\Cache\Adapter;
use Symfony\Component\Cache\Marshaller\DefaultMarshaller;
use Symfony\Component\Cache\Marshaller\MarshallerInterface;
use Symfony\Component\Cache\PruneableInterface;
use Symfony\Component\Cache\Traits\FilesystemTrait;
/**
* Stores tag id <> cache id relationship as a symlink, and lookup on invalidation calls.
*
* @author Nicolas Grekas <p@tchwork.com>
* @author André Rømcke <andre.romcke+symfony@gmail.com>
*
* @experimental in 4.3
*/
class FilesystemTagAwareAdapter extends AbstractTagAwareAdapter implements PruneableInterface
{
use FilesystemTrait {
doSave as private doSaveCache;
doDelete as private doDeleteCache;
}
/**
* Folder used for tag symlinks.
*/
private const TAG_FOLDER = 'tags';
public function __construct(string $namespace = '', int $defaultLifetime = 0, string $directory = null, MarshallerInterface $marshaller = null)
{
$this->marshaller = $marshaller ?? new DefaultMarshaller();
parent::__construct('', $defaultLifetime);
$this->init($namespace, $directory);
}
/**
* {@inheritdoc}
*/
protected function doSave(array $values, ?int $lifetime, array $addTagData = [], array $removeTagData = []): array
{
$failed = $this->doSaveCache($values, $lifetime);
// Add Tags as symlinks
foreach ($addTagData as $tagId => $ids) {
$tagFolder = $this->getTagFolder($tagId);
foreach ($ids as $id) {
if ($failed && \in_array($id, $failed, true)) {
continue;
}
$file = $this->getFile($id);
if (!@symlink($file, $this->getFile($id, true, $tagFolder))) {
@unlink($file);
$failed[] = $id;
}
}
}
// Unlink removed Tags
foreach ($removeTagData as $tagId => $ids) {
$tagFolder = $this->getTagFolder($tagId);
foreach ($ids as $id) {
if ($failed && \in_array($id, $failed, true)) {
continue;
}
@unlink($this->getFile($id, false, $tagFolder));
}
}
return $failed;
}
/**
* {@inheritdoc}
*/
protected function doDelete(array $ids, array $tagData = []): bool
{
$ok = $this->doDeleteCache($ids);
// Remove tags
foreach ($tagData as $tagId => $idMap) {
$tagFolder = $this->getTagFolder($tagId);
foreach ($idMap as $id) {
@unlink($this->getFile($id, false, $tagFolder));
}
}
return $ok;
}
/**
* {@inheritdoc}
*/
protected function doInvalidate(array $tagIds): bool
{
foreach ($tagIds as $tagId) {
if (!file_exists($tagFolder = $this->getTagFolder($tagId))) {
continue;
}
set_error_handler(static function () {});
try {
if (rename($tagFolder, $renamed = substr_replace($tagFolder, bin2hex(random_bytes(4)), -1))) {
$tagFolder = $renamed.\DIRECTORY_SEPARATOR;
} else {
$renamed = null;
}
foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($tagFolder, \FilesystemIterator::SKIP_DOTS | \FilesystemIterator::CURRENT_AS_PATHNAME)) as $itemLink) {
unlink(realpath($itemLink) ?: $itemLink);
unlink($itemLink);
}
if (null === $renamed) {
continue;
}
$chars = '+-ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
for ($i = 0; $i < 38; ++$i) {
for ($j = 0; $j < 38; ++$j) {
rmdir($tagFolder.$chars[$i].\DIRECTORY_SEPARATOR.$chars[$j]);
}
rmdir($tagFolder.$chars[$i]);
}
rmdir($renamed);
} finally {
restore_error_handler();
}
}
return true;
}
private function getTagFolder(string $tagId): string
{
return $this->getFile($tagId, false, $this->directory.self::TAG_FOLDER.\DIRECTORY_SEPARATOR).\DIRECTORY_SEPARATOR;
}
}
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