001/*
002 * Copyright (c) 2007-2016 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
021package cascading.tuple.hadoop.collect;
022
023import java.util.Collection;
024import java.util.Map;
025
026import cascading.flow.FlowProcess;
027import cascading.tuple.Tuple;
028import cascading.tuple.collect.SpillableProps;
029import cascading.tuple.collect.SpillableTupleList;
030import cascading.tuple.collect.SpillableTupleMap;
031import cascading.tuple.collect.TupleMapFactory;
032import org.apache.hadoop.conf.Configuration;
033
034/**
035 *
036 */
037public class HadoopTupleMapFactory implements TupleMapFactory<Configuration>
038  {
039  private int capacity;
040  private float loadFactor;
041  private int mapThreshold;
042  private int listThreshold;
043
044  @Override
045  public void initialize( FlowProcess<? extends Configuration> flowProcess )
046    {
047    capacity = SpillableTupleMap.getMapCapacity( flowProcess, SpillableProps.defaultMapInitialCapacity );
048    loadFactor = SpillableTupleMap.getMapLoadFactor( flowProcess, SpillableProps.defaultMapLoadFactor );
049    mapThreshold = SpillableTupleMap.getMapThreshold( flowProcess, SpillableProps.defaultMapThreshold );
050    listThreshold = SpillableTupleList.getThreshold( flowProcess, SpillableProps.defaultListThreshold );
051    }
052
053  @Override
054  public Map<Tuple, Collection<Tuple>> create( FlowProcess<? extends Configuration> flowProcess )
055    {
056    return new HadoopSpillableTupleMap( capacity, loadFactor, mapThreshold, listThreshold, flowProcess );
057    }
058  }