hadoop SingleUGIResolver 源码
haddop SingleUGIResolver 代码
文件路径：/hadoop-tools/hadoop-fs2img/src/main/java/org/apache/hadoop/hdfs/server/namenode/SingleUGIResolver.java
/**
* 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.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(String s) {
return user;
}
@Override
public String group(String s) {
return group;
}
@Override
public void addUser(String name) {
// do nothing
}
@Override
public void addGroup(String name) {
// do nothing
}
}
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