| /** |
| * 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.namenode; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.hdfs.protocol.Block; |
| import org.apache.hadoop.hdfs.protocol.DatanodeID; |
| import org.apache.hadoop.hdfs.protocol.LocatedBlocks; |
| import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor; |
| import org.apache.hadoop.ipc.Server; |
| |
| /** |
| * This is a utility class to expose NameNode functionality for unit tests. |
| */ |
| public class NameNodeAdapter { |
| /** |
| * Get the namesystem from the namenode |
| */ |
| public static FSNamesystem getNamesystem(NameNode namenode) { |
| return namenode.getNamesystem(); |
| } |
| |
| /** |
| * Get block locations within the specified range. |
| */ |
| public static LocatedBlocks getBlockLocations(NameNode namenode, |
| String src, long offset, long length) throws IOException { |
| return namenode.getNamesystem().getBlockLocations( |
| src, offset, length, false, true); |
| } |
| |
| /** |
| * Get the internal RPC server instance. |
| * @return rpc server |
| */ |
| public static Server getRpcServer(NameNode namenode) { |
| return namenode.server; |
| } |
| |
| public static String getLeaseHolderForPath(NameNode namenode, String path) { |
| return namenode.getNamesystem().leaseManager.getLeaseByPath(path).getHolder(); |
| } |
| |
| /** |
| * Return the datanode descriptor for the given datanode. |
| */ |
| public static DatanodeDescriptor getDatanode(final FSNamesystem ns, |
| DatanodeID id) throws IOException { |
| ns.readLock(); |
| try { |
| return ns.getBlockManager().getDatanodeManager().getDatanode(id); |
| } finally { |
| ns.readUnlock(); |
| } |
| } |
| } |