| /** |
| * 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. |
| */ |
| package org.apache.hadoop.hdfs.protocolPB; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.hdfs.protocol.proto.JournalProtocolProtos.JournalProtocolService; |
| import org.apache.hadoop.hdfs.protocolR23Compatible.ProtocolSignatureWritable; |
| import org.apache.hadoop.security.KerberosInfo; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.ipc.ProtocolInfo; |
| import org.apache.hadoop.ipc.VersionedProtocol; |
| |
| /** |
| * Protocol used to journal edits to a remote node. Currently, |
| * this is used to publish edits from the NameNode to a BackupNode. |
| * |
| * Note: This extends the protocolbuffer service based interface to |
| * add annotations required for security. |
| */ |
| @KerberosInfo( |
| serverPrincipal = DFSConfigKeys.DFS_NAMENODE_USER_NAME_KEY, |
| clientPrincipal = DFSConfigKeys.DFS_NAMENODE_USER_NAME_KEY) |
| @ProtocolInfo(protocolName = |
| "org.apache.hadoop.hdfs.server.protocol.JournalProtocol", |
| protocolVersion = 1) |
| @InterfaceAudience.Private |
| public interface JournalProtocolPB extends |
| JournalProtocolService.BlockingInterface, VersionedProtocol { |
| /** |
| * This method is defined to get the protocol signature using |
| * the R23 protocol - hence we have added the suffix of 2 the method name |
| * to avoid conflict. |
| */ |
| public ProtocolSignatureWritable getProtocolSignature2(String protocol, |
| long clientVersion, int clientMethodsHash) throws IOException; |
| } |
