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 */
018 package org.apache.hadoop.hdfs.protocolPB;
019
020 import java.io.IOException;
021
022 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
023 import org.apache.hadoop.hdfs.protocol.proto.HdfsProtos.VersionRequestProto;
024 import org.apache.hadoop.hdfs.protocol.proto.HdfsProtos.VersionResponseProto;
025 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.EndCheckpointRequestProto;
026 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.EndCheckpointResponseProto;
027 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.ErrorReportRequestProto;
028 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.ErrorReportResponseProto;
029 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetBlockKeysRequestProto;
030 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetBlockKeysResponseProto;
031 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetBlocksRequestProto;
032 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetBlocksResponseProto;
033 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetEditLogManifestRequestProto;
034 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetEditLogManifestResponseProto;
035 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetTransactionIdRequestProto;
036 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetTransactionIdResponseProto;
037 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.RegisterRequestProto;
038 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.RegisterResponseProto;
039 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.RollEditLogRequestProto;
040 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.RollEditLogResponseProto;
041 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.StartCheckpointRequestProto;
042 import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.StartCheckpointResponseProto;
043 import org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys;
044 import org.apache.hadoop.hdfs.server.namenode.CheckpointSignature;
045 import org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations;
046 import org.apache.hadoop.hdfs.server.protocol.NamenodeCommand;
047 import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol;
048 import org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration;
049 import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
050 import org.apache.hadoop.hdfs.server.protocol.RemoteEditLogManifest;
051
052 import com.google.protobuf.RpcController;
053 import com.google.protobuf.ServiceException;
054
055 /**
056 * Implementation for protobuf service that forwards requests
057 * received on {@link NamenodeProtocolPB} to the
058 * {@link NamenodeProtocol} server implementation.
059 */
060 public class NamenodeProtocolServerSideTranslatorPB implements
061 NamenodeProtocolPB {
062 private final NamenodeProtocol impl;
063
064 public NamenodeProtocolServerSideTranslatorPB(NamenodeProtocol impl) {
065 this.impl = impl;
066 }
067
068 @Override
069 public GetBlocksResponseProto getBlocks(RpcController unused,
070 GetBlocksRequestProto request) throws ServiceException {
071 DatanodeInfo dnInfo = new DatanodeInfo(PBHelper.convert(request
072 .getDatanode()));
073 BlocksWithLocations blocks;
074 try {
075 blocks = impl.getBlocks(dnInfo, request.getSize());
076 } catch (IOException e) {
077 throw new ServiceException(e);
078 }
079 return GetBlocksResponseProto.newBuilder()
080 .setBlocks(PBHelper.convert(blocks)).build();
081 }
082
083 @Override
084 public GetBlockKeysResponseProto getBlockKeys(RpcController unused,
085 GetBlockKeysRequestProto request) throws ServiceException {
086 ExportedBlockKeys keys;
087 try {
088 keys = impl.getBlockKeys();
089 } catch (IOException e) {
090 throw new ServiceException(e);
091 }
092 return GetBlockKeysResponseProto.newBuilder()
093 .setKeys(PBHelper.convert(keys)).build();
094 }
095
096 @Override
097 public GetTransactionIdResponseProto getTransactionId(RpcController unused,
098 GetTransactionIdRequestProto request) throws ServiceException {
099 long txid;
100 try {
101 txid = impl.getTransactionID();
102 } catch (IOException e) {
103 throw new ServiceException(e);
104 }
105 return GetTransactionIdResponseProto.newBuilder().setTxId(txid).build();
106 }
107
108 @Override
109 public RollEditLogResponseProto rollEditLog(RpcController unused,
110 RollEditLogRequestProto request) throws ServiceException {
111 CheckpointSignature signature;
112 try {
113 signature = impl.rollEditLog();
114 } catch (IOException e) {
115 throw new ServiceException(e);
116 }
117 return RollEditLogResponseProto.newBuilder()
118 .setSignature(PBHelper.convert(signature)).build();
119 }
120
121 @Override
122 public ErrorReportResponseProto errorReport(RpcController unused,
123 ErrorReportRequestProto request) throws ServiceException {
124 try {
125 impl.errorReport(PBHelper.convert(request.getRegistration()),
126 request.getErrorCode(), request.getMsg());
127 } catch (IOException e) {
128 throw new ServiceException(e);
129 }
130 return ErrorReportResponseProto.newBuilder().build();
131 }
132
133 @Override
134 public RegisterResponseProto register(RpcController unused,
135 RegisterRequestProto request) throws ServiceException {
136 NamenodeRegistration reg;
137 try {
138 reg = impl.register(PBHelper.convert(request.getRegistration()));
139 } catch (IOException e) {
140 throw new ServiceException(e);
141 }
142 return RegisterResponseProto.newBuilder()
143 .setRegistration(PBHelper.convert(reg)).build();
144 }
145
146 @Override
147 public StartCheckpointResponseProto startCheckpoint(RpcController unused,
148 StartCheckpointRequestProto request) throws ServiceException {
149 NamenodeCommand cmd;
150 try {
151 cmd = impl.startCheckpoint(PBHelper.convert(request.getRegistration()));
152 } catch (IOException e) {
153 throw new ServiceException(e);
154 }
155 return StartCheckpointResponseProto.newBuilder()
156 .setCommand(PBHelper.convert(cmd)).build();
157 }
158
159 @Override
160 public EndCheckpointResponseProto endCheckpoint(RpcController unused,
161 EndCheckpointRequestProto request) throws ServiceException {
162 try {
163 impl.endCheckpoint(PBHelper.convert(request.getRegistration()),
164 PBHelper.convert(request.getSignature()));
165 } catch (IOException e) {
166 throw new ServiceException(e);
167 }
168 return EndCheckpointResponseProto.newBuilder().build();
169 }
170
171 @Override
172 public GetEditLogManifestResponseProto getEditLogManifest(
173 RpcController unused, GetEditLogManifestRequestProto request)
174 throws ServiceException {
175 RemoteEditLogManifest manifest;
176 try {
177 manifest = impl.getEditLogManifest(request.getSinceTxId());
178 } catch (IOException e) {
179 throw new ServiceException(e);
180 }
181 return GetEditLogManifestResponseProto.newBuilder()
182 .setManifest(PBHelper.convert(manifest)).build();
183 }
184
185 @Override
186 public VersionResponseProto versionRequest(RpcController controller,
187 VersionRequestProto request) throws ServiceException {
188 NamespaceInfo info;
189 try {
190 info = impl.versionRequest();
191 } catch (IOException e) {
192 throw new ServiceException(e);
193 }
194 return VersionResponseProto.newBuilder()
195 .setInfo(PBHelper.convert(info)).build();
196 }
197 }