| /** |
| * 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.tools; |
| |
| import java.io.IOException; |
| import java.io.PrintStream; |
| import java.net.InetSocketAddress; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.CommonConfigurationKeys; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.DFSUtil; |
| import org.apache.hadoop.hdfs.DFSUtilClient; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.hdfs.NameNodeProxies; |
| import org.apache.hadoop.tools.GetGroupsBase; |
| import org.apache.hadoop.tools.GetUserMappingsProtocol; |
| import org.apache.hadoop.util.ToolRunner; |
| |
| /** |
| * HDFS implementation of a tool for getting the groups which a given user |
| * belongs to. |
| */ |
| @InterfaceAudience.Private |
| public class GetGroups extends GetGroupsBase { |
| |
| private static final Log LOG = LogFactory.getLog(GetGroups.class); |
| |
| static final String USAGE = "Usage: hdfs groups [username ...]"; |
| |
| static{ |
| HdfsConfiguration.init(); |
| } |
| |
| |
| public GetGroups(Configuration conf) { |
| super(conf); |
| } |
| |
| public GetGroups(Configuration conf, PrintStream out) { |
| super(conf, out); |
| } |
| |
| @Override |
| protected InetSocketAddress getProtocolAddress(Configuration conf) |
| throws IOException { |
| return DFSUtilClient.getNNAddress(conf); |
| } |
| |
| @Override |
| public void setConf(Configuration conf) { |
| conf = new HdfsConfiguration(conf); |
| String nameNodePrincipal = conf.get( |
| DFSConfigKeys.DFS_NAMENODE_KERBEROS_PRINCIPAL_KEY, ""); |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Using NN principal: " + nameNodePrincipal); |
| } |
| |
| conf.set(CommonConfigurationKeys.HADOOP_SECURITY_SERVICE_USER_NAME_KEY, |
| nameNodePrincipal); |
| |
| super.setConf(conf); |
| } |
| |
| @Override |
| protected GetUserMappingsProtocol getUgmProtocol() throws IOException { |
| return NameNodeProxies.createProxy(getConf(), FileSystem.getDefaultUri(getConf()), |
| GetUserMappingsProtocol.class).getProxy(); |
| } |
| |
| public static void main(String[] argv) throws Exception { |
| if (DFSUtil.parseHelpArgument(argv, USAGE, System.out, true)) { |
| System.exit(0); |
| } |
| |
| int res = ToolRunner.run(new GetGroups(new HdfsConfiguration()), argv); |
| System.exit(res); |
| } |
| } |