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    
019    package org.apache.hadoop.lib.service.security;
020    
021    import org.apache.hadoop.conf.Configuration;
022    import org.apache.hadoop.lib.server.BaseService;
023    import org.apache.hadoop.lib.server.ServiceException;
024    import org.apache.hadoop.lib.service.Groups;
025    import org.apache.hadoop.lib.util.ConfigurationUtils;
026    
027    import java.io.IOException;
028    import java.util.List;
029    
030    public 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    }