/*
* 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.response;
import java.util.Map;
import org.opencloudb.MycatServer;
import org.opencloudb.backend.PhysicalDBPool;
import org.opencloudb.manager.ManagerConnection;
import org.opencloudb.net.mysql.OkPacket;
import org.opencloudb.parser.ManagerParseSwitch;
import org.opencloudb.parser.util.Pair;
/**
* 切换数据节点的数据源
*
* @author mycat
*/
public final class SwitchDataSource {
public static void response(String stmt, ManagerConnection c) {
int count = 0;
Pair<String[], Integer> pair = ManagerParseSwitch.getPair(stmt);
Map<String, PhysicalDBPool> dns = MycatServer.getInstance().getConfig().getDataHosts();
Integer idx = pair.getValue();
for (String key : pair.getKey()) {
PhysicalDBPool dn = dns.get(key);
if (dn != null) {
int m = dn.getActivedIndex();
int n = (idx == null) ? dn.next(m) : idx.intValue();
if (dn.switchSource(n, false, "MANAGER")) {
++count;
}
}
}
OkPacket packet = new OkPacket();
packet.packetId = 1;
packet.affectedRows = count;
packet.serverStatus = 2;
packet.write(c);
}
}