/**
* Store assiciation in internal chace and external storage
*
* @param string $url OpenID server url
* @param string $handle association handle
* @param string $macFunc HMAC function (sha1 or sha256)
* @param string $secret shared secret
* @param integer $expires expiration UNIX time
* @return void
*/
protected function _addAssociation($url, $handle, $macFunc, $secret, $expires)
{
$this->_cache[$url] = array($handle, $macFunc, $secret, $expires);
return $this->_storage->addAssociation(
$url,
$handle,
$macFunc,
$secret,
$expires);
}