| /** |
| * 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 java.net.InetSocketAddress; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.protocol.proto.JournalProtocolProtos.JournalRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.JournalProtocolProtos.StartLogSegmentRequestProto; |
| import org.apache.hadoop.hdfs.protocolR23Compatible.ProtocolSignatureWritable; |
| import org.apache.hadoop.hdfs.server.protocol.JournalProtocol; |
| import org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration; |
| import org.apache.hadoop.ipc.ProtobufRpcEngine; |
| import org.apache.hadoop.ipc.ProtobufHelper; |
| import org.apache.hadoop.ipc.ProtocolMetaInterface; |
| import org.apache.hadoop.ipc.ProtocolSignature; |
| import org.apache.hadoop.ipc.RPC; |
| import org.apache.hadoop.ipc.RpcClientUtil; |
| import org.apache.hadoop.ipc.RpcPayloadHeader.RpcKind; |
| |
| import com.google.protobuf.RpcController; |
| import com.google.protobuf.ServiceException; |
| |
| /** |
| * This class is the client side translator to translate the requests made on |
| * {@link JournalProtocol} interfaces to the RPC server implementing |
| * {@link JournalProtocolPB}. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Stable |
| public class JournalProtocolTranslatorPB implements ProtocolMetaInterface, |
| JournalProtocol, Closeable { |
| /** RpcController is not used and hence is set to null */ |
| private final static RpcController NULL_CONTROLLER = null; |
| private final JournalProtocolPB rpcProxy; |
| |
| public JournalProtocolTranslatorPB(InetSocketAddress nameNodeAddr, |
| Configuration conf) throws IOException { |
| RPC.setProtocolEngine(conf, JournalProtocolPB.class, ProtobufRpcEngine.class); |
| rpcProxy = RPC.getProxy(JournalProtocolPB.class, |
| RPC.getProtocolVersion(JournalProtocolPB.class), nameNodeAddr, conf); |
| } |
| |
| @Override |
| public void close() { |
| RPC.stopProxy(rpcProxy); |
| } |
| |
| @Override |
| public long getProtocolVersion(String protocolName, long clientVersion) |
| throws IOException { |
| return rpcProxy.getProtocolVersion(protocolName, clientVersion); |
| } |
| |
| @Override |
| public ProtocolSignature getProtocolSignature(String protocol, |
| long clientVersion, int clientMethodsHash) throws IOException { |
| return ProtocolSignatureWritable.convert(rpcProxy.getProtocolSignature2( |
| protocol, clientVersion, clientMethodsHash)); |
| } |
| |
| @Override |
| public void journal(NamenodeRegistration reg, long firstTxnId, |
| int numTxns, byte[] records) throws IOException { |
| JournalRequestProto req = JournalRequestProto.newBuilder() |
| .setRegistration(PBHelper.convert(reg)) |
| .setFirstTxnId(firstTxnId) |
| .setNumTxns(numTxns) |
| .setRecords(PBHelper.getByteString(records)) |
| .build(); |
| try { |
| rpcProxy.journal(NULL_CONTROLLER, req); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public void startLogSegment(NamenodeRegistration registration, long txid) |
| throws IOException { |
| StartLogSegmentRequestProto req = StartLogSegmentRequestProto.newBuilder() |
| .setRegistration(PBHelper.convert(registration)) |
| .setTxid(txid) |
| .build(); |
| try { |
| rpcProxy.startLogSegment(NULL_CONTROLLER, req); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public boolean isMethodSupported(String methodName) throws IOException { |
| return RpcClientUtil.isMethodSupported(rpcProxy, JournalProtocolPB.class, |
| RpcKind.RPC_PROTOCOL_BUFFER, |
| RPC.getProtocolVersion(JournalProtocolPB.class), methodName); |
| } |
| } |