Proyectos de Subversion LeadersLinked - Services

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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 string
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     */
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    private $namespace;
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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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        $this->namespace = strval($config['leaderslinked.memcache.namespace']);
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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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     * @param int $ttl
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     */
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    public function setItem($key, $value, $ttl = 0)
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    {
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        $ttl = $ttl ? $ttl : $this->ttl;
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        $key = $this->namespace ? $this->namespace . '-' . $key : $key;
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        if ($this->hasItem($key)) {
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            $this->cache->replace($key, serialize($value), time() + $ttl);
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        } else {
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            $this->cache->add($key, serialize($value), time() + $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 ($this->hasItem($key)) {
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            $key = $this->namespace ? $this->namespace . '-' . $key : $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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     * {@inheritdoc}
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     * @see \LeadersLinked\Cache\CacheInterface::getAll()
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     */
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    public function getAll()
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    {
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        return $this->cache->fetchAll();
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    }
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    /**
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     *
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     * {@inheritdoc}
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     * @see \LeadersLinked\Cache\CacheInterface::hasItem()
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     */
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    public function hasItem($key)
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    {
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        $key = $this->namespace ? $this->namespace . '-' . $key : $key;
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        $keys = $this->cache->getAllKeys();
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        if ($keys === false) {
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            return false;
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        }
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        return in_array($key, $keys, true);
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    }
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    /**
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     *
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     * {@inheritdoc}
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     * @see \LeadersLinked\Cache\CacheInterface::getItem()
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     */
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    public function getItem($key)
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    {
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        if ($this->hasItem($key)) {
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            $key = $this->namespace ? $this->namespace . '-' . $key : $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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