| /** |
| * 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 java.util.List; |
| |
| import javax.net.SocketFactory; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.ReconfigurationTaskStatus; |
| import org.apache.hadoop.hdfs.protocol.ReconfigurationProtocol; |
| import org.apache.hadoop.hdfs.protocol.proto.ReconfigurationProtocolProtos.GetReconfigurationStatusRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.ReconfigurationProtocolProtos.ListReconfigurablePropertiesRequestProto; |
| import org.apache.hadoop.hdfs.protocol.proto.ReconfigurationProtocolProtos.ListReconfigurablePropertiesResponseProto; |
| import org.apache.hadoop.hdfs.protocol.proto.ReconfigurationProtocolProtos.StartReconfigurationRequestProto; |
| import org.apache.hadoop.ipc.ProtobufHelper; |
| import org.apache.hadoop.ipc.ProtobufRpcEngine; |
| import org.apache.hadoop.ipc.ProtocolMetaInterface; |
| import org.apache.hadoop.ipc.ProtocolTranslator; |
| import org.apache.hadoop.ipc.RPC; |
| import org.apache.hadoop.ipc.RpcClientUtil; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.protobuf.RpcController; |
| import com.google.protobuf.ServiceException; |
| |
| /** |
| * This class is the client side translator to translate the requests made on |
| * {@link ReconfigurationProtocol} interfaces to the RPC server implementing |
| * {@link ReconfigurationProtocolPB}. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Stable |
| public class ReconfigurationProtocolTranslatorPB implements |
| ProtocolMetaInterface, ReconfigurationProtocol, ProtocolTranslator, |
| Closeable { |
| public static final Logger LOG = LoggerFactory |
| .getLogger(ReconfigurationProtocolTranslatorPB.class); |
| |
| private static final RpcController NULL_CONTROLLER = null; |
| private static final StartReconfigurationRequestProto VOID_START_RECONFIG = |
| StartReconfigurationRequestProto.newBuilder().build(); |
| |
| private static final ListReconfigurablePropertiesRequestProto |
| VOID_LIST_RECONFIGURABLE_PROPERTIES = |
| ListReconfigurablePropertiesRequestProto.newBuilder().build(); |
| |
| private static final GetReconfigurationStatusRequestProto |
| VOID_GET_RECONFIG_STATUS = |
| GetReconfigurationStatusRequestProto.newBuilder().build(); |
| |
| private final ReconfigurationProtocolPB rpcProxy; |
| |
| public ReconfigurationProtocolTranslatorPB(InetSocketAddress addr, |
| UserGroupInformation ticket, Configuration conf, SocketFactory factory) |
| throws IOException { |
| rpcProxy = createReconfigurationProtocolProxy(addr, ticket, conf, factory, |
| 0); |
| } |
| |
| static ReconfigurationProtocolPB createReconfigurationProtocolProxy( |
| InetSocketAddress addr, UserGroupInformation ticket, Configuration conf, |
| SocketFactory factory, int socketTimeout) throws IOException { |
| RPC.setProtocolEngine(conf, ReconfigurationProtocolPB.class, |
| ProtobufRpcEngine.class); |
| return RPC.getProxy(ReconfigurationProtocolPB.class, |
| RPC.getProtocolVersion(ReconfigurationProtocolPB.class), |
| addr, ticket, conf, factory, socketTimeout); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| RPC.stopProxy(rpcProxy); |
| } |
| |
| @Override |
| public Object getUnderlyingProxyObject() { |
| return rpcProxy; |
| } |
| |
| @Override |
| public void startReconfiguration() throws IOException { |
| try { |
| rpcProxy.startReconfiguration(NULL_CONTROLLER, VOID_START_RECONFIG); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public ReconfigurationTaskStatus getReconfigurationStatus() |
| throws IOException { |
| try { |
| return ReconfigurationProtocolUtils.getReconfigurationStatus( |
| rpcProxy |
| .getReconfigurationStatus( |
| NULL_CONTROLLER, |
| VOID_GET_RECONFIG_STATUS)); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public List<String> listReconfigurableProperties() throws IOException { |
| ListReconfigurablePropertiesResponseProto response; |
| try { |
| response = rpcProxy.listReconfigurableProperties(NULL_CONTROLLER, |
| VOID_LIST_RECONFIGURABLE_PROPERTIES); |
| return response.getNameList(); |
| } catch (ServiceException e) { |
| throw ProtobufHelper.getRemoteException(e); |
| } |
| } |
| |
| @Override |
| public boolean isMethodSupported(String methodName) throws IOException { |
| return RpcClientUtil.isMethodSupported(rpcProxy, |
| ReconfigurationProtocolPB.class, |
| RPC.RpcKind.RPC_PROTOCOL_BUFFER, |
| RPC.getProtocolVersion(ReconfigurationProtocolPB.class), |
| methodName); |
| } |
| } |