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.conf.Configuration;
022import org.apache.hadoop.lib.server.BaseService;
023import org.apache.hadoop.lib.server.ServiceException;
024import org.apache.hadoop.lib.service.Groups;
025import org.apache.hadoop.lib.util.ConfigurationUtils;
026
027import java.io.IOException;
028import java.util.List;
029
030public class GroupsService extends BaseService implements Groups {
031  private static final String PREFIX = "groups";
032
033  private org.apache.hadoop.security.Groups hGroups;
034
035  public GroupsService() {
036    super(PREFIX);
037  }
038
039  @Override
040  protected void init() throws ServiceException {
041    Configuration hConf = new Configuration(false);
042    ConfigurationUtils.copy(getServiceConfig(), hConf);
043    hGroups = new org.apache.hadoop.security.Groups(hConf);
044  }
045
046  @Override
047  public Class getInterface() {
048    return Groups.class;
049  }
050
051  @Override
052  public List<String> getGroups(String user) throws IOException {
053    return hGroups.getGroups(user);
054  }
055
056}