protected static function loadSlaveServers()
{
static $is_loaded = null;
if ($is_loaded !== null) {
return;
}
// Add here your slave(s) server(s) in this file
if (file_exists(_PS_ROOT_DIR_ . '/config/db_slave_server.inc.php')) {
self::$_servers = array_merge(self::$_servers, require _PS_ROOT_DIR_ . '/config/db_slave_server.inc.php');
}
$is_loaded = true;
}
/**
* Get Db object instance
*
* @param bool $master Decides whether the connection to be returned by the master server or the slave server
* @return Db instance
*/
public static function getInstance($master = true)
{
static $id = 0;
// This MUST not be declared with the class members because some defines (like _DB_SERVER_) may not exist yet (the constructor can be called directly with params)
if (!self::$_servers) {
self::$_servers = array(array('server' => _DB_SERVER_, 'user' => _DB_USER_, 'password' => _DB_PASSWD_, 'database' => _DB_NAME_));
}
$total_servers = count(self::$_servers);
if ($master || $total_servers == 1) {
$id_server = 0;
} else {
$id++;
$id_server = $total_servers > 2 && $id % $total_servers != 0 ? $id : 1;
}
if (!isset(self::$instance[$id_server])) {
$class = Db::getClass();
self::$instance[$id_server] = new $class(self::$_servers[$id_server]['server'], self::$_servers[$id_server]['user'], self::$_servers[$id_server]['password'], self::$_servers[$id_server]['database']);
}
return self::$instance[$id_server];
}
