001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hdfs.protocolPB;
019
020import org.apache.hadoop.classification.InterfaceAudience;
021import org.apache.hadoop.classification.InterfaceStability;
022import org.apache.hadoop.fs.CommonConfigurationKeys;
023import org.apache.hadoop.ipc.ProtocolInfo;
024import org.apache.hadoop.security.KerberosInfo;
025import org.apache.hadoop.hdfs.protocol.proto.ReconfigurationProtocolProtos.ReconfigurationProtocolService;
026
027/**
028 * Protocol that clients use to communicate with the NN/DN to do
029 * reconfiguration on the fly.
030 *
031 * Note: This extends the protocolbuffer service based interface to
032 * add annotations required for security.
033 */
034@KerberosInfo(serverPrincipal =
035    CommonConfigurationKeys.HADOOP_SECURITY_SERVICE_USER_NAME_KEY)
036@ProtocolInfo(
037    protocolName = "org.apache.hadoop.hdfs.protocol.ReconfigurationProtocol",
038    protocolVersion = 1)
039@InterfaceAudience.Public
040@InterfaceStability.Evolving
041public interface ReconfigurationProtocolPB extends
042    ReconfigurationProtocolService.BlockingInterface {
043}