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<?php
/**
* This file is part of workerman.
*
* Licensed under The MIT License
* For full copyright and license information, please see the MIT-LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @author walkor<walkor@workerman.net>
* @copyright walkor<walkor@workerman.net>
* @link http://www.workerman.net/
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
namespace GatewayWorker\Lib;
use Config\Db as DbConfig;
use Exception;
/**
* 数据库类
*/
class Db
{
/**
* 实例数组
*
* @var array
*/
protected static $instance = array();
/**
* 获取实例
*
* @param string $config_name
* @return DbConnection
* @throws Exception
*/
public static function instance($config_name)
{
if (!isset(DbConfig::$$config_name)) {
echo "\\Config\\Db::$config_name not set\n";
throw new Exception("\\Config\\Db::$config_name not set\n");
}
if (empty(self::$instance[$config_name])) {
$config = DbConfig::$$config_name;
self::$instance[$config_name] = new DbConnection($config['host'], $config['port'],
$config['user'], $config['password'], $config['dbname']);
}
return self::$instance[$config_name];
}
/**
* 关闭数据库实例
*
* @param string $config_name
*/
public static function close($config_name)
{
if (isset(self::$instance[$config_name])) {
self::$instance[$config_name]->closeConnection();
self::$instance[$config_name] = null;
}
}
/**
* 关闭所有数据库实例
*/
public static function closeAll()
{
foreach (self::$instance as $connection) {
$connection->closeConnection();
}
self::$instance = array();
}
}