/* * 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); } } }