| /** |
| * 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 org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * Dynamically assign ids to users/groups as they appear in the external |
| * filesystem. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Unstable |
| public class FsUGIResolver extends UGIResolver { |
| |
| private int id; |
| private final Set<String> usernames; |
| private final Set<String> groupnames; |
| |
| FsUGIResolver() { |
| super(); |
| id = 0; |
| usernames = new HashSet<String>(); |
| groupnames = new HashSet<String>(); |
| } |
| |
| @Override |
| public synchronized void addUser(String name) { |
| if (!usernames.contains(name)) { |
| addUser(name, id); |
| id++; |
| usernames.add(name); |
| } |
| } |
| |
| @Override |
| public synchronized void addGroup(String name) { |
| if (!groupnames.contains(name)) { |
| addGroup(name, id); |
| id++; |
| groupnames.add(name); |
| } |
| } |
| |
| } |