hadoop FsUGIResolver 源码
haddop FsUGIResolver 代码
文件路径：/hadoop-tools/hadoop-fs2img/src/main/java/org/apache/hadoop/hdfs/server/namenode/FsUGIResolver.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 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);
}
}
}
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