    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  }