/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package org.opencloudb.net.handler;
import java.util.Set;
/**
* 权限提供者
*
* @author mycat
*/
public interface FrontendPrivileges {
/**
* 检查schema是否存在
*/
boolean schemaExists(String schema);
/**
* 检查用户是否存在，并且可以使用host实行隔离策略。
*/
boolean userExists(String user, String host);
/**
* 提供用户的服务器端密码
*/
String getPassword(String user);
/**
* 提供有效的用户schema集合
*/
Set<String> getUserSchemas(String user);
/**
* 检查用户是否为只读权限
* @param user
* @return
*/
Boolean isReadOnly(String user);
}