Provide global switch about memcacheserviceprovider

[AdSegura]

Hi.

You can override SimpleWrapper and use it:

$app['memcache.wrapper'] = 'Oka\Lib\Memcached\McacheWrapper';

Declare the switch:

$app['mcache'] = true;

McacheWrapper:

class McacheWrapper extends SimpleWrapper{

    /**
     * @param $key
     * @param callable $fallback
     * @param null $expiration
     * @param null $compress
     * @return bool
     */
    public function get($key, \Closure $fallback = null, $expiration = null, $compress = null)
    {
        if(!$this->app['mcache'] && $fallback instanceof \Closure)
        {
            $result = $fallback();
            return $result;
        }

        $result = $this->memcache->get($key);

        if ($result === false && $fallback instanceof \Closure) {
            $result = $fallback();
            if ($this->set($key, $result, $expiration, $compress) === false) {
                return false;
            }
        }

        return $result;
    }
}

Regards.