| /** |
| * 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.server.federation.router; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import org.apache.hadoop.hdfs.protocol.DatanodeInfo; |
| import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType; |
| import org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys; |
| import org.apache.hadoop.hdfs.server.federation.resolver.FileSubclusterResolver; |
| import org.apache.hadoop.hdfs.server.namenode.CheckpointSignature; |
| import org.apache.hadoop.hdfs.server.namenode.NameNode.OperationCategory; |
| import org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations; |
| import org.apache.hadoop.hdfs.server.protocol.DatanodeStorageReport; |
| 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; |
| |
| /** |
| * Module that implements all the RPC calls in {@link NamenodeProtocol} in the |
| * {@link RouterRpcServer}. |
| */ |
| public class RouterNamenodeProtocol implements NamenodeProtocol { |
| |
| /** RPC server to receive client calls. */ |
| private final RouterRpcServer rpcServer; |
| /** RPC clients to connect to the Namenodes. */ |
| private final RouterRpcClient rpcClient; |
| /** Interface to map global name space to HDFS subcluster name spaces. */ |
| private final FileSubclusterResolver subclusterResolver; |
| |
| |
| public RouterNamenodeProtocol(RouterRpcServer server) { |
| this.rpcServer = server; |
| this.rpcClient = this.rpcServer.getRPCClient(); |
| this.subclusterResolver = this.rpcServer.getSubclusterResolver(); |
| } |
| |
| @Override |
| public BlocksWithLocations getBlocks(DatanodeInfo datanode, long size, |
| long minBlockSize) throws IOException { |
| rpcServer.checkOperation(OperationCategory.READ); |
| |
| // Get the namespace where the datanode is located |
| Map<String, DatanodeStorageReport[]> map = |
| rpcServer.getDatanodeStorageReportMap(DatanodeReportType.ALL); |
| String nsId = null; |
| for (Entry<String, DatanodeStorageReport[]> entry : map.entrySet()) { |
| DatanodeStorageReport[] dns = entry.getValue(); |
| for (DatanodeStorageReport dn : dns) { |
| DatanodeInfo dnInfo = dn.getDatanodeInfo(); |
| if (dnInfo.getDatanodeUuid().equals(datanode.getDatanodeUuid())) { |
| nsId = entry.getKey(); |
| break; |
| } |
| } |
| // Break the loop if already found |
| if (nsId != null) { |
| break; |
| } |
| } |
| |
| // Forward to the proper namenode |
| if (nsId != null) { |
| RemoteMethod method = new RemoteMethod( |
| NamenodeProtocol.class, "getBlocks", |
| new Class<?>[] {DatanodeInfo.class, long.class, long.class}, |
| datanode, size, minBlockSize); |
| return rpcClient.invokeSingle(nsId, method, BlocksWithLocations.class); |
| } |
| return null; |
| } |
| |
| @Override |
| public ExportedBlockKeys getBlockKeys() throws IOException { |
| rpcServer.checkOperation(OperationCategory.READ); |
| |
| // We return the information from the default name space |
| String defaultNsId = subclusterResolver.getDefaultNamespace(); |
| RemoteMethod method = |
| new RemoteMethod(NamenodeProtocol.class, "getBlockKeys"); |
| return rpcClient.invokeSingle(defaultNsId, method, ExportedBlockKeys.class); |
| } |
| |
| @Override |
| public long getTransactionID() throws IOException { |
| rpcServer.checkOperation(OperationCategory.READ); |
| |
| // We return the information from the default name space |
| String defaultNsId = subclusterResolver.getDefaultNamespace(); |
| RemoteMethod method = |
| new RemoteMethod(NamenodeProtocol.class, "getTransactionID"); |
| return rpcClient.invokeSingle(defaultNsId, method, long.class); |
| } |
| |
| @Override |
| public long getMostRecentCheckpointTxId() throws IOException { |
| rpcServer.checkOperation(OperationCategory.READ); |
| |
| // We return the information from the default name space |
| String defaultNsId = subclusterResolver.getDefaultNamespace(); |
| RemoteMethod method = |
| new RemoteMethod(NamenodeProtocol.class, "getMostRecentCheckpointTxId"); |
| return rpcClient.invokeSingle(defaultNsId, method, long.class); |
| } |
| |
| @Override |
| public CheckpointSignature rollEditLog() throws IOException { |
| rpcServer.checkOperation(OperationCategory.WRITE, false); |
| return null; |
| } |
| |
| @Override |
| public NamespaceInfo versionRequest() throws IOException { |
| rpcServer.checkOperation(OperationCategory.READ); |
| |
| // We return the information from the default name space |
| String defaultNsId = subclusterResolver.getDefaultNamespace(); |
| RemoteMethod method = |
| new RemoteMethod(NamenodeProtocol.class, "versionRequest"); |
| return rpcClient.invokeSingle(defaultNsId, method, NamespaceInfo.class); |
| } |
| |
| @Override |
| public void errorReport(NamenodeRegistration registration, int errorCode, |
| String msg) throws IOException { |
| rpcServer.checkOperation(OperationCategory.UNCHECKED, false); |
| } |
| |
| @Override |
| public NamenodeRegistration registerSubordinateNamenode( |
| NamenodeRegistration registration) throws IOException { |
| rpcServer.checkOperation(OperationCategory.WRITE, false); |
| return null; |
| } |
| |
| @Override |
| public NamenodeCommand startCheckpoint(NamenodeRegistration registration) |
| throws IOException { |
| rpcServer.checkOperation(OperationCategory.WRITE, false); |
| return null; |
| } |
| |
| @Override |
| public void endCheckpoint(NamenodeRegistration registration, |
| CheckpointSignature sig) throws IOException { |
| rpcServer.checkOperation(OperationCategory.WRITE, false); |
| } |
| |
| @Override |
| public RemoteEditLogManifest getEditLogManifest(long sinceTxId) |
| throws IOException { |
| rpcServer.checkOperation(OperationCategory.READ, false); |
| return null; |
| } |
| |
| @Override |
| public boolean isUpgradeFinalized() throws IOException { |
| rpcServer.checkOperation(OperationCategory.READ, false); |
| return false; |
| } |
| |
| @Override |
| public boolean isRollingUpgrade() throws IOException { |
| rpcServer.checkOperation(OperationCategory.READ, false); |
| return false; |
| } |
| |
| @Override |
| public Long getNextSPSPath() throws IOException { |
| rpcServer.checkOperation(OperationCategory.READ, false); |
| // not supported |
| return null; |
| } |
| } |