/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
// Functions implemented by all the master protocols (e.g. MasterAdminProtocol,
// MasterMonitorProtocol). Currently, this is only isMasterRunning, which is used,
// on proxy creation, to check if the master has been stopped. If it has,
// a MasterNotRunningException is thrown back to the client, and the client retries.
package org.apache.hadoop.hbase;
import org.apache.hadoop.hbase.protobuf.generated.MasterProtos.IsMasterRunningRequest;
import org.apache.hadoop.hbase.protobuf.generated.MasterProtos.IsMasterRunningResponse;
import org.apache.hadoop.hbase.protobuf.generated.MasterProtos.MasterService;
import org.apache.hadoop.hbase.ipc.VersionedProtocol;
import com.google.protobuf.RpcController;
import com.google.protobuf.ServiceException;
public interface MasterProtocol extends VersionedProtocol, MasterService.BlockingInterface {
/**
* @param c Unused (set to null).
* @param req IsMasterRunningRequest
* @return IsMasterRunningRequest that contains:<br>
* isMasterRunning: true if master is available
* @throws ServiceException
*/
public IsMasterRunningResponse isMasterRunning(RpcController c, IsMasterRunningRequest req)
throws ServiceException;
}