MatthiasMullie\Scrapbook\Adapters\Couchbase::cas PHP 메소드

    public function cas($token, $key, $value, $expire = 0)
    {
        $value = $this->serialize($value);
        try {
            $result = $this->client->replace($key, $value, array('expiry' => $expire, 'cas' => $token));
        } catch (\CouchbaseException $e) {
            return false;
        }
        return !$result->error;
    }