Package sizzle.aggregators

Source Code of sizzle.aggregators.UniqueSizzleCombiner

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package sizzle.aggregators;

import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mrunit.mapreduce.ReduceDriver;
import org.junit.Test;

import sizzle.io.EmitKey;
import sizzle.io.EmitValue;

public class TestUniqueAggregator {
  @Test
  public void testUniqueAggregatorCombineDistinct() {
    final List<EmitValue> values = new ArrayList<EmitValue>();
    values.add(new EmitValue("one"));
    values.add(new EmitValue("two"));
    values.add(new EmitValue("three"));
    values.add(new EmitValue("four"));

    final ReduceDriver<EmitKey, EmitValue, EmitKey, EmitValue> reduceDriver = new ReduceDriver<EmitKey, EmitValue, EmitKey, EmitValue>(
        new UniqueSizzleCombiner());
    reduceDriver.setInput(new EmitKey("test"), values);
    reduceDriver.addOutput(new EmitKey("test"), new EmitValue("one"));
    reduceDriver.addOutput(new EmitKey("test"), new EmitValue("two"));
    reduceDriver.addOutput(new EmitKey("test"), new EmitValue("three"));
    reduceDriver.addOutput(new EmitKey("test"), new EmitValue("four"));
    reduceDriver.runTest();
  }

  @Test
  public void testUniqueAggregatorCombineIndistinct() {
    final List<EmitValue> values = new ArrayList<EmitValue>();
    values.add(new EmitValue("one"));
    values.add(new EmitValue("one"));
    values.add(new EmitValue("one"));
    values.add(new EmitValue("one"));
    values.add(new EmitValue("two"));
    values.add(new EmitValue("two"));
    values.add(new EmitValue("two"));
    values.add(new EmitValue("two"));
    values.add(new EmitValue("three"));
    values.add(new EmitValue("three"));
    values.add(new EmitValue("three"));
    values.add(new EmitValue("three"));
    values.add(new EmitValue("four"));
    values.add(new EmitValue("four"));
    values.add(new EmitValue("four"));
    values.add(new EmitValue("four"));

    final ReduceDriver<EmitKey, EmitValue, EmitKey, EmitValue> reduceDriver = new ReduceDriver<EmitKey, EmitValue, EmitKey, EmitValue>(
        new UniqueSizzleCombiner());
    reduceDriver.setInput(new EmitKey("test"), values);
    reduceDriver.addOutput(new EmitKey("test"), new EmitValue("one"));
    reduceDriver.addOutput(new EmitKey("test"), new EmitValue("two"));
    reduceDriver.addOutput(new EmitKey("test"), new EmitValue("three"));
    reduceDriver.addOutput(new EmitKey("test"), new EmitValue("four"));
    reduceDriver.runTest();
  }

  @Test
  public void testUniqueAggregatorReduceDistinct() {
    final List<EmitValue> values = new ArrayList<EmitValue>();
    values.add(new EmitValue("one"));
    values.add(new EmitValue("two"));
    values.add(new EmitValue("three"));
    values.add(new EmitValue("four"));

    final ReduceDriver<EmitKey, EmitValue, Text, NullWritable> reduceDriver = new ReduceDriver<EmitKey, EmitValue, Text, NullWritable>(
        new UniqueSizzleReducer());
    reduceDriver.setInput(new EmitKey("test"), values);
    reduceDriver.addOutput(new Text("test[] = 4"), NullWritable.get());
    reduceDriver.runTest();
  }

  @Test
  public void testUniqueAggregatorReduceIndistinct() {
    final List<EmitValue> values = new ArrayList<EmitValue>();
    values.add(new EmitValue("one"));
    values.add(new EmitValue("one"));
    values.add(new EmitValue("one"));
    values.add(new EmitValue("one"));
    values.add(new EmitValue("two"));
    values.add(new EmitValue("two"));
    values.add(new EmitValue("two"));
    values.add(new EmitValue("two"));
    values.add(new EmitValue("three"));
    values.add(new EmitValue("three"));
    values.add(new EmitValue("three"));
    values.add(new EmitValue("three"));
    values.add(new EmitValue("four"));
    values.add(new EmitValue("four"));
    values.add(new EmitValue("four"));
    values.add(new EmitValue("four"));

    final ReduceDriver<EmitKey, EmitValue, Text, NullWritable> reduceDriver = new ReduceDriver<EmitKey, EmitValue, Text, NullWritable>(
        new UniqueSizzleReducer());
    reduceDriver.setInput(new EmitKey("test"), values);
    reduceDriver.addOutput(new Text("test[] = 4"), NullWritable.get());
    reduceDriver.runTest();
  }
}

class UniqueSizzleCombiner extends sizzle.runtime.SizzleCombiner {
  public UniqueSizzleCombiner() {
    super();

    this.tables.put("test", new Table(new sizzle.aggregators.UniqueAggregator(10000)));
  }
}

class UniqueSizzleReducer extends sizzle.runtime.SizzleReducer {
  public UniqueSizzleReducer() {
    super();

    this.tables.put("test", new Table(new sizzle.aggregators.UniqueAggregator(10000)));
  }
}
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