/*
* Copyright 2012-2015 org.opencloudb.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.opencloudb.server.response;
import org.opencloudb.MycatServer;
import org.opencloudb.mysql.PacketUtil;
import org.opencloudb.net.FrontendConnection;
import org.opencloudb.net.mysql.ErrorPacket;
import org.opencloudb.net.mysql.OkPacket;
/**
* 加入了offline状态推送，用于心跳语句。
*
* @author mycat
*/
public class Ping {
private static final ErrorPacket error = PacketUtil.getShutdown();
public static void response(FrontendConnection c) {
if (MycatServer.getInstance().isOnline()) {
c.write(c.writeToBuffer(OkPacket.OK, c.allocate()));
} else {
error.write(c);
}
}
}