/**
* memcacheサーバに接続.
* @return Memcache object.
*/
protected static function connect()
{
if (is_null(self::$mc)) {
$conf = mfwServerEnv::memcache();
if (!$conf) {
throw new Exception('memcache server undefined');
}
$mc = new Memcache();
if ($mc->connect($conf['host'], $conf['port'])) {
self::$mc = $mc;
} else {
error_log("cannot connect memcached ({$conf['host']}:{$conf['port']})");
}
}
return self::$mc;
}
