| /** |
| * 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.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configurable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| /** |
| * Map all owners/groups in external system to a single user in FSImage. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Unstable |
| public class SingleUGIResolver extends UGIResolver implements Configurable { |
| |
| public static final String UID = "hdfs.image.writer.ugi.single.uid"; |
| public static final String USER = "hdfs.image.writer.ugi.single.user"; |
| public static final String GID = "hdfs.image.writer.ugi.single.gid"; |
| public static final String GROUP = "hdfs.image.writer.ugi.single.group"; |
| |
| private int uid; |
| private int gid; |
| private String user; |
| private String group; |
| private Configuration conf; |
| |
| @Override |
| public void setConf(Configuration conf) { |
| this.conf = conf; |
| uid = conf.getInt(UID, 0); |
| user = conf.get(USER); |
| if (null == user) { |
| try { |
| user = UserGroupInformation.getCurrentUser().getShortUserName(); |
| } catch (IOException e) { |
| user = "hadoop"; |
| } |
| } |
| gid = conf.getInt(GID, 1); |
| group = conf.get(GROUP); |
| if (null == group) { |
| group = user; |
| } |
| |
| resetUGInfo(); |
| addUser(user, uid); |
| addGroup(group, gid); |
| } |
| |
| @Override |
| public Configuration getConf() { |
| return conf; |
| } |
| |
| @Override |
| public String user(FileStatus s) { |
| return user; |
| } |
| |
| @Override |
| public String group(FileStatus s) { |
| return group; |
| } |
| |
| @Override |
| public void addUser(String name) { |
| // do nothing |
| } |
| |
| @Override |
| public void addGroup(String name) { |
| // do nothing |
| } |
| } |