001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.lib.service.security;
020
021import org.apache.hadoop.classification.InterfaceAudience;
022import org.apache.hadoop.conf.Configuration;
023import org.apache.hadoop.lib.server.BaseService;
024import org.apache.hadoop.lib.server.ServiceException;
025import org.apache.hadoop.lib.service.Groups;
026import org.apache.hadoop.lib.util.ConfigurationUtils;
027
028import java.io.IOException;
029import java.util.List;
030
031@InterfaceAudience.Private
032public class GroupsService extends BaseService implements Groups {
033  private static final String PREFIX = "groups";
034
035  private org.apache.hadoop.security.Groups hGroups;
036
037  public GroupsService() {
038    super(PREFIX);
039  }
040
041  @Override
042  protected void init() throws ServiceException {
043    Configuration hConf = new Configuration(false);
044    ConfigurationUtils.copy(getServiceConfig(), hConf);
045    hGroups = new org.apache.hadoop.security.Groups(hConf);
046  }
047
048  @Override
049  public Class getInterface() {
050    return Groups.class;
051  }
052
053  @Override
054  public List<String> getGroups(String user) throws IOException {
055    return hGroups.getGroups(user);
056  }
057
058}