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<?php |
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/* |
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* This file is part of the Shieldon Simple Cache package. |
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* |
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* (c) Terry L. <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Shieldon\SimpleCache\Driver; |
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use Shieldon\SimpleCache\CacheProvider; |
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use Shieldon\SimpleCache\Exception\CacheException; |
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use Memcache as MemcacheServer; |
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use Exception; |
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use function array_keys; |
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/** |
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* A cache driver class provided by Memcache |
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* |
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* @see https://www.php.net/manual/en/book.memcache.php |
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*/ |
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class Memcache extends CacheProvider |
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{ |
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protected $type = 'memcache'; |
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/** |
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* The Memcache instance. |
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* |
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* @var \Memcache|null |
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*/ |
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protected $memcache = null; |
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/** |
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* Constructor. |
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* |
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* @param array $setting The settings. |
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* |
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* @throws CacheException |
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*/ |
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public function __construct(array $setting = []) |
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{ |
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$config = [ |
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'host' => '127.0.0.1', |
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'port' => 11211, |
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// If the UNIX socket is set, host and port will be ignored. |
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'unix_socket' => '', |
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]; |
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foreach (array_keys($config) as $key) { |
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if (isset($setting[$key])) { |
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$config[$key] = $setting[$key]; |
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} |
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} |
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$this->connect($config); |
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} |
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/** |
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* Connect to Memchaced server. |
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* |
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* @param array $config The settings. |
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* |
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* @return void |
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* |
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* @throws CacheException |
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*/ |
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protected function connect(array $config): void |
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{ |
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if (extension_loaded('memcache')) { |
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try { |
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$this->memcache = new MemcacheServer(); |
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if (!empty($config['unix_socket'])) { |
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// @codeCoverageIgnoreStart |
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$this->memcache->addServer( |
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'unix://' . $config['unix_socket'], |
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0 |
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); |
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// @codeCoverageIgnoreEnd |
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} else { |
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$this->memcache->addServer( |
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$config['host'], |
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$config['port'], |
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true, |
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1 |
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); |
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} |
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// @codeCoverageIgnoreStart |
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} catch (Exception $e) { |
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throw new CacheException($e->getMessage()); |
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} |
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// @codeCoverageIgnoreEnd |
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return; |
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} |
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// @codeCoverageIgnoreStart |
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throw new CacheException( |
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'PHP Memcache extension is not installed on your system.' |
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); |
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// @codeCoverageIgnoreEnd |
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} |
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/** |
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* Fetch a cache by an extended Cache Driver. |
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* |
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* @param string $key The key of a cache. |
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* |
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* @return array |
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*/ |
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protected function doGet(string $key): array |
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{ |
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$content = $this->memcache->get($key); |
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if (empty($content)) { |
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return []; |
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} |
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$data = $content; |
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return $data; |
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} |
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/** |
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* Set a cache by an extended Cache Driver. |
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* |
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* @param string $key The key of a cache. |
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* @param mixed $value The value of a cache. (serialized) |
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* @param int $ttl The time to live for a cache. |
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* @param int $timestamp The time to store a cache. |
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* |
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* @return bool |
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*/ |
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protected function doSet(string $key, $value, int $ttl, int $timestamp): bool |
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{ |
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$contents = [ |
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'timestamp' => $timestamp, |
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'ttl' => $ttl, |
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'value' => $value, |
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]; |
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$result = $this->memcache->set( |
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$key, |
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$contents, |
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0, |
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$ttl |
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); |
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return $result; |
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} |
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/** |
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* Delete a cache by an extended Cache Driver. |
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* |
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* @param string $key The key of a cache. |
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* |
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* @return bool |
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*/ |
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protected function doDelete(string $key): bool |
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{ |
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return $this->memcache->delete($key); |
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} |
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/** |
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* Delete all caches by an extended Cache Driver. |
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* |
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* @return bool |
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*/ |
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protected function doClear(): bool |
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{ |
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return $this->memcache->flush(); |
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} |
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/** |
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* Check if the cache exists or not. |
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* |
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* @param string $key The key of a cache. |
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* |
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* @return bool |
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*/ |
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protected function doHas(string $key): bool |
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{ |
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$content = $this->memcache->get($key); |
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if (empty($content)) { |
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return false; |
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} |
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return true; |
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} |
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} |
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