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<?php |
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/* |
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* This file is part of the Koded package. |
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* |
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* (c) Mihail Binev <[email protected]> |
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* |
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* Please view the LICENSE distributed with this source code |
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* for the full copyright and license information. |
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* |
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*/ |
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namespace Koded\Caching\Client; |
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use Exception; |
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use Koded\Caching\{Cache, CacheException}; |
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use function Koded\Caching\verify_key; |
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/** |
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* @property ShmopClient client |
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* |
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*/ |
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final class ShmopClient implements Cache |
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{ |
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use ClientTrait, MultiplesTrait; |
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/** @var string */ |
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private $dir; |
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public function __construct(string $dir, ?int $ttl) |
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{ |
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$this->dir = $dir; |
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$this->ttl = $ttl; |
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$this->setDirectory($dir); |
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} |
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public function get($key, $default = null) |
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{ |
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if (false === $this->has($key, $filename)) { |
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return $default; |
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} |
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try { |
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$resource = shmop_open(fileinode($filename), 'a', 0, 0); |
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return unserialize(shmop_read($resource, 0, shmop_size($resource))); |
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} finally { |
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shmop_close($resource); |
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} |
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} |
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public function set($key, $value, $ttl = null) |
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{ |
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verify_key($key); |
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if (1 > $expiration = $this->timestampWithGlobalTtl($ttl, Cache::DATE_FAR_FAR_AWAY)) { |
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// The item is considered expired and must be deleted |
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return $this->delete($key); |
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} |
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$value = serialize($value); |
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$size = strlen($value); |
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$filename = $this->filename($key, true); |
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try { |
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$resource = shmop_open(fileinode($filename), 'n', 0666, $size); |
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} catch (Exception $e) { |
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$resource = shmop_open(fileinode($filename), 'w', 0666, $size); |
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} |
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try { |
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return shmop_write($resource, $value, 0) === $size |
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&& false !== file_put_contents($filename . '-ttl', $expiration); |
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} finally { |
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shmop_close($resource); |
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} |
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} |
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public function delete($key) |
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{ |
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if (false === $this->has($key, $filename)) { |
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return true; |
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} |
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return $this->expire($filename); |
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} |
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public function clear() |
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{ |
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foreach ((glob($this->dir . 'shmop-*.cache*') ?: []) as $filename) { |
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$this->expire($filename); |
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} |
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return true; |
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} |
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public function has($key, &$filename = '') |
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{ |
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verify_key($key); |
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$filename = $this->filename($key, false); |
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$expiration = (int)(@file_get_contents($filename . '-ttl') ?: 0); |
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if ($expiration <= time()) { |
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$this->expire($filename); |
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return false; |
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} |
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return true; |
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} |
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private function filename(string $key, bool $create): string |
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{ |
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$filename = $this->dir . 'shmop-' . sha1($key) . '.cache'; |
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if ($create) { |
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touch($filename); |
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touch($filename . '-ttl'); |
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chmod($filename, 0666); |
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chmod($filename . '-ttl', 0666); |
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} |
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return $filename; |
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} |
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/** |
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* Prepares the cache directory. |
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* |
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* @param string $directory |
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* |
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* @throws CacheException |
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*/ |
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private function setDirectory(string $directory): void |
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{ |
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// Overrule shell misconfiguration or the web server |
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umask(umask() | 0002); |
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$dir = $directory ?: sys_get_temp_dir(); |
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$dir = rtrim($dir, '/') . '/'; |
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if (false === is_dir($dir) && false === mkdir($dir, 0775, true)) { |
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throw CacheException::forCreatingDirectory($dir); |
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} |
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$this->dir = $dir; |
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} |
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private function expire(string $filename): bool |
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{ |
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if (false === $resource = @shmop_open(fileinode($filename), 'w', 0, 0)) { |
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return false; |
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} |
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try { |
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unlink($filename . '-ttl'); |
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return shmop_delete($resource); |
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} finally { |
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shmop_close($resource); |
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} |
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} |
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} |
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kodedphp /
cache-simple
