public static function instance($name = null, array $config = array())
{
if (empty($name)) {
$name = '_db';
}
/** 单例*/
if (Registry::has($name)) {
return Registry::get($name);
}
if (empty($config)) {
/** @var \Yaf\Config\Ini $_config */
$_config = Registry::get('config');
if (!$_config || !($tmp = $_config->get($name))) {
return false;
}
$config = $tmp->toArray();
}
if (empty($config['adapter'])) {
$config['adapter'] = 'Pdo\\Mysql';
}
$db = Db::factory($config);
Registry::set($name, $db);
return $db;
}
/**
* Slave MySQL Adapter
*
* @param string $name
* @return DBAbstract
*/
public function slave($name = null)
{
if ($this->_slave) {
return $this->_slave;
}
if (is_null($name) || empty($this->_config['slave'][$name])) {
$name = array_rand($this->_config['slave']);
}
$params = $this->_config['slave'][$name];
$config = array('adapter' => $this->_config['adapter'], 'params' => $params);
$this->_slave = Db::factory($config);
$this->_mysql = $this->_slave;
return $this->_slave;
}
/**
* Connect db from config
*
* @param null $name
* @param array $config
* @return Db\DbAbstract
* @throws DBException
*/
public function db($name = null, array $config = array())
{
if (empty($name)) {
$name = $this->_db;
}
return Db::instance($name, $config);
}
