001    /*
002     * Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved.
003     *
004     * Project and contact information: http://www.cascading.org/
005     *
006     * This file is part of the Cascading project.
007     *
008     * Licensed under the Apache License, Version 2.0 (the "License");
009     * you may not use this file except in compliance with the License.
010     * You may obtain a copy of the License at
011     *
012     *     http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing, software
015     * distributed under the License is distributed on an "AS IS" BASIS,
016     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017     * See the License for the specific language governing permissions and
018     * limitations under the License.
019     */
020    
021    package cascading.flow.hadoop2;
022    
023    import java.util.Map;
024    import java.util.Properties;
025    import java.util.Set;
026    
027    import cascading.flow.hadoop.planner.HadoopPlanner;
028    import org.apache.hadoop.conf.Configuration;
029    
030    /**
031     *
032     */
033    public class Hadoop2MR1Planner extends HadoopPlanner
034      {
035      /**
036       * Method copyJobConf adds the given JobConf values to the given properties object. Use this method to pass
037       * custom default Hadoop JobConf properties to Hadoop.
038       *
039       * @param properties    of type Map
040       * @param configuration of type JobConf
041       */
042      public static void copyConfiguration( Map<Object, Object> properties, Configuration configuration )
043        {
044        for( Map.Entry<String, String> entry : configuration )
045          properties.put( entry.getKey(), entry.getValue() );
046        }
047    
048    //  /**
049    //   * Method createJobConf returns a new JobConf instance using the values in the given properties argument.
050    //   *
051    //   * @param properties of type Map
052    //   * @return a JobConf instance
053    //   */
054    //  public static JobConf createJobConf( Map<Object, Object> properties )
055    //    {
056    //    JobConf conf = new JobConf();
057    //
058    //    copyProperties( conf, properties );
059    //
060    //    return conf;
061    //    }
062    
063      /**
064       * Method copyProperties adds the given Map values to the given JobConf object.
065       *
066       * @param configuration of type JobConf
067       * @param properties    of type Map
068       */
069      public static void copyProperties( Configuration configuration, Map<Object, Object> properties )
070        {
071        if( properties instanceof Properties )
072          {
073          Properties props = (Properties) properties;
074          Set<String> keys = props.stringPropertyNames();
075    
076          for( String key : keys )
077            configuration.set( key, props.getProperty( key ) );
078          }
079        else
080          {
081          for( Map.Entry<Object, Object> entry : properties.entrySet() )
082            {
083            if( entry.getValue() != null )
084              configuration.set( entry.getKey().toString(), entry.getValue().toString() );
085            }
086          }
087        }
088      }