001    /**
002     * Copyright (c) 2010 Yahoo! Inc. All rights reserved.
003     * Licensed under the Apache License, Version 2.0 (the "License");
004     * you may not use this file except in compliance with the License.
005     * You may obtain a copy of the License at
006     *
007     *   http://www.apache.org/licenses/LICENSE-2.0
008     *
009     *  Unless required by applicable law or agreed to in writing, software
010     *  distributed under the License is distributed on an "AS IS" BASIS,
011     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012     *  See the License for the specific language governing permissions and
013     *  limitations under the License. See accompanying LICENSE file.
014     */
015    package org.apache.oozie.action.hadoop;
016    
017    import org.apache.hadoop.mapred.JobClient;
018    import org.apache.hadoop.mapred.JobConf;
019    import org.apache.hadoop.io.Text;
020    import org.apache.hadoop.mapreduce.security.token.delegation.DelegationTokenIdentifier;
021    import org.apache.hadoop.security.token.Token;
022    import org.apache.oozie.action.hadoop.AuthHelper;
023    
024    import java.io.IOException;
025    
026    public class KerberosAuthHelper extends AuthHelper {
027    
028        public void set(JobClient jobClient, JobConf launcherJobConf) throws IOException, InterruptedException {
029            Token<DelegationTokenIdentifier> mrdt = jobClient.getDelegationToken(new Text("mr token"));
030            launcherJobConf.getCredentials().addToken(new Text("mr token"), mrdt);
031        }
032    
033    }