164 lines
3.1 KiB
PHP
164 lines
3.1 KiB
PHP
<?php declare(strict_types=1);
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/**
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* Banker
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*
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* A Caching library implementing psr/cache
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*
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* PHP version 7.0
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*
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* @package Banker
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* @author Timothy J. Warren <tim@timshomepage.net>
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* @copyright 2016 Timothy J. Warren
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @version 1.0.0
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* @link https://git.timshomepage.net/timw4mail/banker
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*/
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namespace Aviat\Banker\Driver;
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use Aviat\Banker\Exception\CacheException;
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/**
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* Redis cache backend
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*/
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class MemcacheDriver extends AbstractDriver {
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/**
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* Driver for PHP Memcache extension
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*
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* @param array $config
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* @param array $options
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* @throws CacheException
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*/
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public function __construct(array $config = [], array $options = [])
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{
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// @codeCoverageIgnoreStart
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if ( ! class_exists('Memcache'))
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{
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throw new CacheException('Memcache driver requires the PHP memcache extension');
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}
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// @codeCoverageIgnoreEnd
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$this->conn = new \Memcache();
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$method = ($config['persistent'] === TRUE) ? 'pconnect' : 'connect';
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$this->conn->$method($config['host'], (int) $config['port']);
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}
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/**
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* Disconnect from memcached server
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*/
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public function __destruct()
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{
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$this->conn->close();
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}
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/**
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* See if a key currently exists in the cache
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*
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* @param string $key
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* @return bool
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*/
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public function exists(string $key): bool
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{
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return $this->conn->get($key) !== FALSE;
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}
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/**
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* Get the value for the selected cache key
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*
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* @param string $key
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* @return mixed
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*/
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public function get(string $key)
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{
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return $this->conn->get($key);
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}
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/**
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* Retrieve a set of values by their cache key
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*
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* @param string[] $keys
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* @return array
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*/
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public function getMultiple(array $keys = []): array
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{
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return $this->conn->get($keys);
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}
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/**
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* Set a cached value
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*
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* @param string $key
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* @param mixed $value
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* @param int $expires
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* @return DriverInterface
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*/
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public function set(string $key, $value, int $expires = 0): DriverInterface
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{
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if ($this->exists($key))
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{
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$this->conn->replace($key, $value, 0, $expires);
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}
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else
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{
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$this->conn->set($key, $value, 0, $expires);
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}
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return $this;
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}
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/**
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* Remove an item from the cache
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*
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* @param string $key
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* @return boolean
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*/
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public function delete(string $key): bool
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{
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return $this->conn->delete($key);
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}
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/**
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* Remove multiple items from the cache
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*
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* @param string[] $keys
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* @return boolean
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*/
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public function deleteMultiple(array $keys = []): bool
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{
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// Iteratively delete each item, using a boolean
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// 'and' operation to return false if any deletion fails
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return \array_reduce($keys, function($prev, $key) {
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return $prev && $this->conn->delete($key);
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}, TRUE);
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}
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/**
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* Empty the cache
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*
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* @return boolean
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*/
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public function flush(): bool
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{
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return $this->conn->flush();
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}
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/**
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* Set the specified key to expire at the given time
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*
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* @param string $key
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* @param int $expires
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* @return boolean
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*/
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public function expiresAt(string $key, int $expires): bool
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{
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$value = $this->get($key);
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$timediff = $expires - time();
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$this->set($key, $value, $timediff);
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return TRUE;
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}
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} |