| /** |
| * 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.Closeable; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.hdfs.protocol.DatanodeID; |
| import org.apache.hadoop.hdfs.protocol.DatanodeInfo; |
| import org.apache.hadoop.hdfs.protocol.proto.HdfsProtos.NamenodeCommandProto; |
| import org.apache.hadoop.hdfs.protocol.proto.HdfsProtos.VersionRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.EndCheckpointRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.ErrorReportRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetBlockKeysRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetBlockKeysResponseProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetBlocksRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetEditLogManifestRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetMostRecentCheckpointTxIdRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.GetTransactionIdRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.RegisterRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.RollEditLogRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.StartCheckpointRequestProto; |
| import org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys; |
| import org.apache.hadoop.hdfs.server.namenode.CheckpointSignature; |
| import org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations; |
| import org.apache.hadoop.hdfs.server.protocol.NamenodeCommand; |
| import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol; |
| import org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration; |
| import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo; |
| import org.apache.hadoop.hdfs.server.protocol.RemoteEditLogManifest; |
| import org.apache.hadoop.ipc.ProtobufHelper; |
| import org.apache.hadoop.ipc.ProtocolMetaInterface; |
| import org.apache.hadoop.ipc.RPC; |
| import org.apache.hadoop.ipc.RpcClientUtil; |
| |
| import com.google.protobuf.RpcController; |
| import com.google.protobuf.ServiceException; |
| |
| /** |
| * This class is the client side translator to translate the requests made on |
| * {@link NamenodeProtocol} interfaces to the RPC server implementing |
| * {@link NamenodeProtocolPB}. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Stable |
| public class NamenodeProtocolTranslatorPB implements NamenodeProtocol, |
| ProtocolMetaInterface, Closeable { |
| /** RpcController is not used and hence is set to null */ |
| private final static RpcController NULL_CONTROLLER = null; |
| |
| /* |
| * Protobuf requests with no parameters instantiated only once |
| */ |
| private static final GetBlockKeysRequestProto VOID_GET_BLOCKKEYS_REQUEST = |
| GetBlockKeysRequestProto.newBuilder().build(); |
| private static final GetTransactionIdRequestProto VOID_GET_TRANSACTIONID_REQUEST = |
| GetTransactionIdRequestProto.newBuilder().build(); |
| private static final RollEditLogRequestProto VOID_ROLL_EDITLOG_REQUEST = |
| RollEditLogRequestProto.newBuilder().build(); |
| private static final VersionRequestProto VOID_VERSION_REQUEST = |
| VersionRequestProto.newBuilder().build(); |
| |
| final private NamenodeProtocolPB rpcProxy; |
| |
| public NamenodeProtocolTranslatorPB(NamenodeProtocolPB rpcProxy) { |
| this.rpcProxy = rpcProxy; |
| } |
| |
| @Override |
| public void close() { |
| RPC.stopProxy(rpcProxy); |
| } |
| |
| @Override |
| public BlocksWithLocations getBlocks(DatanodeInfo datanode, long size) |
| throws IOException { |
| GetBlocksRequestProto req = GetBlocksRequestProto.newBuilder() |
| .setDatanode(PBHelper.convert((DatanodeID)datanode)).setSize(size) |
| .build(); |
| try { |
| return PBHelper.convert(rpcProxy.getBlocks(NULL_CONTROLLER, req) |
| .getBlocks()); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public ExportedBlockKeys getBlockKeys() throws IOException { |
| try { |
| GetBlockKeysResponseProto rsp = rpcProxy.getBlockKeys(NULL_CONTROLLER, |
| VOID_GET_BLOCKKEYS_REQUEST); |
| return rsp.hasKeys() ? PBHelper.convert(rsp.getKeys()) : null; |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public long getTransactionID() throws IOException { |
| try { |
| return rpcProxy.getTransactionId(NULL_CONTROLLER, |
| VOID_GET_TRANSACTIONID_REQUEST).getTxId(); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public long getMostRecentCheckpointTxId() throws IOException { |
| try { |
| return rpcProxy.getMostRecentCheckpointTxId(NULL_CONTROLLER, |
| GetMostRecentCheckpointTxIdRequestProto.getDefaultInstance()).getTxId(); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public CheckpointSignature rollEditLog() throws IOException { |
| try { |
| return PBHelper.convert(rpcProxy.rollEditLog(NULL_CONTROLLER, |
| VOID_ROLL_EDITLOG_REQUEST).getSignature()); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public NamespaceInfo versionRequest() throws IOException { |
| try { |
| return PBHelper.convert(rpcProxy.versionRequest(NULL_CONTROLLER, |
| VOID_VERSION_REQUEST).getInfo()); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public void errorReport(NamenodeRegistration registration, int errorCode, |
| String msg) throws IOException { |
| ErrorReportRequestProto req = ErrorReportRequestProto.newBuilder() |
| .setErrorCode(errorCode).setMsg(msg) |
| .setRegistration(PBHelper.convert(registration)).build(); |
| try { |
| rpcProxy.errorReport(NULL_CONTROLLER, req); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public NamenodeRegistration register(NamenodeRegistration registration) |
| throws IOException { |
| RegisterRequestProto req = RegisterRequestProto.newBuilder() |
| .setRegistration(PBHelper.convert(registration)).build(); |
| try { |
| return PBHelper.convert(rpcProxy.register(NULL_CONTROLLER, req) |
| .getRegistration()); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public NamenodeCommand startCheckpoint(NamenodeRegistration registration) |
| throws IOException { |
| StartCheckpointRequestProto req = StartCheckpointRequestProto.newBuilder() |
| .setRegistration(PBHelper.convert(registration)).build(); |
| NamenodeCommandProto cmd; |
| try { |
| cmd = rpcProxy.startCheckpoint(NULL_CONTROLLER, req).getCommand(); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| return PBHelper.convert(cmd); |
| } |
| |
| @Override |
| public void endCheckpoint(NamenodeRegistration registration, |
| CheckpointSignature sig) throws IOException { |
| EndCheckpointRequestProto req = EndCheckpointRequestProto.newBuilder() |
| .setRegistration(PBHelper.convert(registration)) |
| .setSignature(PBHelper.convert(sig)).build(); |
| try { |
| rpcProxy.endCheckpoint(NULL_CONTROLLER, req); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public RemoteEditLogManifest getEditLogManifest(long sinceTxId) |
| throws IOException { |
| GetEditLogManifestRequestProto req = GetEditLogManifestRequestProto |
| .newBuilder().setSinceTxId(sinceTxId).build(); |
| try { |
| return PBHelper.convert(rpcProxy.getEditLogManifest(NULL_CONTROLLER, req) |
| .getManifest()); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public boolean isMethodSupported(String methodName) throws IOException { |
| return RpcClientUtil.isMethodSupported(rpcProxy, NamenodeProtocolPB.class, |
| RPC.RpcKind.RPC_PROTOCOL_BUFFER, |
| RPC.getProtocolVersion(NamenodeProtocolPB.class), methodName); |
| } |
| } |