Proyectos de Subversion LeadersLinked - Backend

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<?php
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declare(strict_types=1);
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namespace LeadersLinked\Cache;
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class CacheImpl implements CacheInterface
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{
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    /**
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     *
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     * @var \LeadersLinked\Cache\CacheInterface
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     */
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    private static $_instance;
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    /**
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     *
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     * @var \Memcached
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     */
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    private $cache;
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    /**
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     *
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     * @var int
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     */
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    private $ttl;
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    /**
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     *
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     * @param Array $config
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     */
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    private function __construct($config)
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    {
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         $this->ttl         = intval($config['leaderslinked.memcache.ttl'], 10);
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         $host              = strval($config['leaderslinked.memcache.host']);
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         $port              = intval($config['leaderslinked.memcache.port'], 10);
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         $this->cache = new \Memcached();
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         $this->cache->addserver($host, $port);
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    }
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    /**
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     *
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     * @param array $config
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     * @return \LeadersLinked\Cache\CacheInterface
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     */
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    public static function getInstance($config)
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    {
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        if(self::$_instance == null) {
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            self::$_instance = new CacheImpl($config);
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        }
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        return self::$_instance;
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    }
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    /**
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     *
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     * @param string $key
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     * @param mixed $value
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     */
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    public function setItem($key, $value)
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    {
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        if($this->cache->checkKey($key)) {
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            $this->cache->replace($key, serialize($value), $this->ttl);
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        } else {
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            $this->cache->add($key, serialize($value), $this->ttl);
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        }
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    }
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    /**
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     *
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     * @param string $key
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     * @return boolean
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     */
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    public function removeItem($key)
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    {
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        if($this->cache->checkKey($key)) {
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            return $this->cache->delete($key);
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        } else {
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            return true;
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        }
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    }
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    /**
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     *
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     * @param string $key
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     * @return boolean
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     */
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    public function hasItem($key)
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    {
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        return $this->cache->checkKey($key);
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    }
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    /**
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     *
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     * @param string $key
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     * @return mixed
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     */
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    public function getItem($key)
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    {
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        if($this->cache->checkKey($key)) {
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            $value = $this->cache->get($key);
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            if(is_string($value)) {
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                return unserialize($value);
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            } else {
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                return $value;
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            }
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        } else {
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            return null;
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        }
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    }
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}
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