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    package org.apache.oozie.coord;
019    
020    import org.apache.hadoop.conf.Configuration;
021    import org.apache.oozie.client.OozieClient;
022    import org.apache.oozie.util.ParamChecker;
023    import org.jdom.Element;
024    
025    public class CoordUtils {
026        public static final String HADOOP_UGI = "hadoop.job.ugi";
027    
028        public static final String HADOOP_USER = "user.name";
029    
030        public static String getDoneFlag(Element doneFlagElement) {
031            if (doneFlagElement != null) {
032                return doneFlagElement.getTextTrim();
033            }
034            else {
035                return CoordELConstants.DEFAULT_DONE_FLAG;
036            }
037        }
038    
039        public static Configuration getHadoopConf(Configuration jobConf) {
040            Configuration conf = new Configuration();
041            ParamChecker.notNull(jobConf, "Configuration to be used for hadoop setup ");
042            String user = ParamChecker.notEmpty(jobConf.get(OozieClient.USER_NAME), OozieClient.USER_NAME);
043            String group = ParamChecker.notEmpty(jobConf.get(OozieClient.GROUP_NAME), OozieClient.GROUP_NAME);
044            conf.set(HADOOP_USER, user);
045            conf.set(HADOOP_UGI, user + "," + group);
046            return conf;
047        }
048    }