* @copyright 2016 - 2017 Timothy J. Warren * @license http://www.opensource.org/licenses/mit-license.html MIT License * @version 1.0.1 * @link https://git.timshomepage.net/timw4mail/banker */ namespace Aviat\Banker\Driver; use Aviat\Banker\Exception\CacheException; /** * Redis cache backend */ class MemcacheDriver extends AbstractDriver { /** * Driver for PHP Memcache extension * * @param array $config * @param array $options * @throws CacheException */ public function __construct(array $config = [], array $options = []) { // @codeCoverageIgnoreStart if ( ! class_exists('Memcache')) { throw new CacheException('Memcache driver requires the PHP memcache extension'); } // @codeCoverageIgnoreEnd $this->conn = new \Memcache(); $method = ($config['persistent'] === TRUE) ? 'pconnect' : 'connect'; $this->conn->$method($config['host'], (int) $config['port']); } /** * Disconnect from memcached server */ public function __destruct() { $this->conn->close(); } /** * See if a key currently exists in the cache * * @param string $key * @return bool */ public function exists(string $key): bool { return $this->conn->get($key) !== FALSE; } /** * Get the value for the selected cache key * * @param string $key * @return mixed */ public function get(string $key) { return $this->conn->get($key); } /** * Retrieve a set of values by their cache key * * @param string[] $keys * @return array */ public function getMultiple(array $keys = []): array { return $this->conn->get($keys); } /** * Set a cached value * * @param string $key * @param mixed $value * @param int $expires * @return DriverInterface */ public function set(string $key, $value, int $expires = 0): DriverInterface { if ($this->exists($key)) { $this->conn->replace($key, $value, 0, $expires); } else { $this->conn->set($key, $value, 0, $expires); } return $this; } /** * Remove an item from the cache * * @param string $key * @return boolean */ public function delete(string $key): bool { return $this->conn->delete($key); } /** * Remove multiple items from the cache * * @param string[] $keys * @return boolean */ public function deleteMultiple(array $keys = []): bool { // Iteratively delete each item, using a boolean // 'and' operation to return false if any deletion fails return \array_reduce($keys, function($prev, $key) { return $prev && $this->conn->delete($key); }, TRUE); } /** * Empty the cache * * @return boolean */ public function flush(): bool { return $this->conn->flush(); } /** * Set the specified key to expire at the given time * * @param string $key * @param int $expires * @return boolean */ public function expiresAt(string $key, int $expires): bool { $value = $this->get($key); $timediff = $expires - time(); $this->set($key, $value, $timediff); return TRUE; } }