org.apache.hadoop.hive.ql.exec.spark.ShuffleTran Maven / Gradle / Ivy

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 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.hadoop.hive.ql.exec.spark;

import org.apache.hadoop.hive.ql.io.HiveKey;
import org.apache.hadoop.hive.ql.plan.SparkEdgeProperty;
import org.apache.hadoop.io.BytesWritable;
import org.apache.spark.api.java.JavaPairRDD;
import org.apache.spark.storage.StorageLevel;

public class ShuffleTran implements SparkTran {
  private final SparkShuffler shuffler;
  private final int numOfPartitions;
  private final boolean toCache;
  private final SparkPlan sparkPlan;
  private final String name;
  private final SparkEdgeProperty edge;

  public ShuffleTran(SparkPlan sparkPlan, SparkShuffler sf, int n) {
    this(sparkPlan, sf, n, false, "Shuffle", null);
  }

  public ShuffleTran(SparkPlan sparkPlan, SparkShuffler sf, int n, boolean toCache, String name,
                     SparkEdgeProperty edge) {
    shuffler = sf;
    numOfPartitions = n;
    this.toCache = toCache;
    this.sparkPlan = sparkPlan;
    this.name = name;
    this.edge = edge;
  }

  @Override
  public JavaPairRDD transform(JavaPairRDD input) {
    JavaPairRDD result = shuffler.shuffle(input, numOfPartitions);
    if (toCache) {
      sparkPlan.addCachedRDDId(result.id());
      result = result.persist(StorageLevel.MEMORY_AND_DISK());
    }
    return result.setName(this.name + " (" + edge.getShuffleType() + ", " + numOfPartitions +
            (toCache ? ", cached)" : ")"));
  }

  public int getNoOfPartitions() {
    return numOfPartitions;
  }

  @Override
  public String getName() {
    return name;
  }

  @Override
  public Boolean isCacheEnable() {
    return new Boolean(toCache);
  }

  public SparkShuffler getShuffler() {
    return shuffler;
  }
}