/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* 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
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pig.test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.apache.pig.builtin.Bloom;
import org.apache.pig.builtin.BuildBloom;
import org.apache.pig.data.BagFactory;
import org.apache.pig.data.DataBag;
import org.apache.pig.data.DataByteArray;
import org.apache.pig.data.Tuple;
import org.apache.pig.data.TupleFactory;
import org.junit.Test;
/**
* This class unit tests the built in UDFs BuildBloom and Bloom.
*/
public class TestBloom {
static class TestBuildBloom extends BuildBloom {
TestBuildBloom(String numElements, String desiredFalsePositive) {
super("jenkins", numElements, desiredFalsePositive);
}
int getSize() {
return vSize;
}
int getNumHash() {
return numHash;
}
}
@Test
public void testSizeCalc() throws Exception {
TestBuildBloom tbb = new TestBuildBloom("1000", "0.01");
assertEquals(9585, tbb.getSize());
assertEquals(6, tbb.getNumHash());
tbb = new TestBuildBloom("1000000", "0.01");
assertEquals(9585058, tbb.getSize());
assertEquals(6, tbb.getNumHash());
tbb = new TestBuildBloom("1000", "0.0001");
assertEquals(19170, tbb.getSize());
assertEquals(13, tbb.getNumHash());
tbb = new TestBuildBloom("1000000", "0.00001");
assertEquals(23962645, tbb.getSize());
assertEquals(16, tbb.getNumHash());
}
@Test(expected = RuntimeException.class)
public void testBadHash() throws Exception {
String size = "100";
String numHash = "3";
String hashFunc = "nosuchhash";
try {
BuildBloom bb = new BuildBloom(hashFunc, "fixed", size, numHash);
} catch (RuntimeException re) {
assertTrue(re.getMessage().contains("Unknown hash type"));
throw re;
}
}
@Test
public void testFuncNames() throws Exception {
String size = "100";
String numHash = "3";
String hashFunc = "JENKINS_HASH";
BuildBloom bb = new BuildBloom(hashFunc, "fixed", size, numHash);
assertEquals("org.apache.pig.builtin.BuildBloom$Initial",
bb.getInitial());
assertEquals("org.apache.pig.builtin.BuildBloom$Intermediate",
bb.getIntermed());
assertEquals("org.apache.pig.builtin.BuildBloom$Final",
bb.getFinal());
}
@Test
public void testMap() throws Exception {
String size = "100";
String numHash = "3";
String hashFunc = "JENKINS";
TupleFactory tf = TupleFactory.getInstance();
BagFactory bf = BagFactory.getInstance();
Tuple t = tf.newTuple(1);
t.set(0, 1);
DataBag b = bf.newDefaultBag();
b.add(t);
Tuple input = tf.newTuple(b);
BuildBloom.Initial map =
new BuildBloom.Initial(hashFunc, "fixed", size, numHash);
t = map.exec(input);
Bloom bloom = new Bloom("bla");
bloom.setFilter((DataByteArray)t.get(0));
// Test that everything we put in passes.
Tuple t1 = tf.newTuple(1);
t1.set(0, 1);
assertTrue(bloom.exec(t1));
// A few that don't pass
for (int i = 100; i < 10; i++) {
Tuple t2 = tf.newTuple(1);
t2.set(0, i);
assertFalse(bloom.exec(t2));
}
}
@Test
public void testCombiner() throws Exception {
String size = "100";
String numHash = "3";
String hashFunc = "jenkins";
TupleFactory tf = TupleFactory.getInstance();
BagFactory bf = BagFactory.getInstance();
DataBag combinerBag = bf.newDefaultBag();
for (int j = 0; j < 3; j++) { // map loop
Tuple t = tf.newTuple(1);
t.set(0, 10 + j);
DataBag mapBag = bf.newDefaultBag();
mapBag.add(t);
Tuple input = tf.newTuple(mapBag);
BuildBloom.Initial map =
new BuildBloom.Initial(hashFunc, "fixed", size, numHash);
combinerBag.add(map.exec(input));
}
Tuple t = tf.newTuple(1);
t.set(0, combinerBag);
BuildBloom.Intermediate combiner =
new BuildBloom.Intermediate(hashFunc, "fixed", size, numHash);
t = combiner.exec(t);
Bloom bloom = new Bloom("bla");
bloom.setFilter((DataByteArray)t.get(0));
// Test that everything we put in passes.
for (int j = 0; j < 3; j++) {
Tuple t1 = tf.newTuple(1);
t1.set(0, 10 + j);
assertTrue(bloom.exec(t1));
}
// A few that don't pass
for (int i = 100; i < 10; i++) {
Tuple t2 = tf.newTuple(1);
t2.set(0, i);
assertFalse(bloom.exec(t2));
}
}
@Test
public void testSingleKey() throws Exception {
String size = "100";
String numHash = "3";
String hashFunc = "MURMUR";
TupleFactory tf = TupleFactory.getInstance();
BagFactory bf = BagFactory.getInstance();
DataBag reducerBag = bf.newDefaultBag();
for (int i = 0; i < 3; i++) { // combiner loop
DataBag combinerBag = bf.newDefaultBag();
for (int j = 0; j < 3; j++) { // map loop
Tuple t = tf.newTuple(1);
t.set(0, i * 10 + j);
DataBag mapBag = bf.newDefaultBag();
mapBag.add(t);
Tuple input = tf.newTuple(mapBag);
BuildBloom.Initial map =
new BuildBloom.Initial(hashFunc, "fixed", size, numHash);
combinerBag.add(map.exec(input));
}
Tuple t = tf.newTuple(1);
t.set(0, combinerBag);
BuildBloom.Intermediate combiner =
new BuildBloom.Intermediate(hashFunc, "fixed", size, numHash);
reducerBag.add(combiner.exec(t));
}
Tuple t = tf.newTuple(1);
t.set(0, reducerBag);
BuildBloom.Final reducer =
new BuildBloom.Final(hashFunc, "fixed", size, numHash);
DataByteArray dba = reducer.exec(t);
Bloom bloom = new Bloom("bla");
bloom.setFilter(dba);
// Test that everything we put in passes.
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
Tuple t1 = tf.newTuple(1);
t1.set(0, i * 10 + j);
assertTrue(bloom.exec(t1));
}
}
// A few that don't pass
for (int i = 100; i < 10; i++) {
Tuple t1 = tf.newTuple(1);
t1.set(0, i);
assertFalse(bloom.exec(t1));
}
}
@Test
public void testMultiKey() throws Exception {
String numElements = "10";
String falsePositive = "0.001";
String hashFunc = "murmur";
TupleFactory tf = TupleFactory.getInstance();
BagFactory bf = BagFactory.getInstance();
String[][] strs = {
{ "fred", "joe", "bob" },
{ "mary", "sally", "jane" },
{ "fido", "spot", "fluffly" } };
DataBag reducerBag = bf.newDefaultBag();
for (int i = 0; i < 3; i++) { // combiner loop
DataBag combinerBag = bf.newDefaultBag();
for (int j = 0; j < 3; j++) { // map loop
Tuple t = tf.newTuple(2);
t.set(0, i * 10 + j);
t.set(1, strs[i][j]);
DataBag mapBag = bf.newDefaultBag();
mapBag.add(t);
Tuple input = tf.newTuple(mapBag);
BuildBloom.Initial map =
new BuildBloom.Initial(hashFunc, numElements,
falsePositive);
combinerBag.add(map.exec(input));
}
Tuple t = tf.newTuple(1);
t.set(0, combinerBag);
BuildBloom.Intermediate combiner =
new BuildBloom.Intermediate(hashFunc, numElements,
falsePositive);
reducerBag.add(combiner.exec(t));
}
Tuple t = tf.newTuple(1);
t.set(0, reducerBag);
BuildBloom.Final reducer =
new BuildBloom.Final(hashFunc, numElements, falsePositive);
DataByteArray dba = reducer.exec(t);
Bloom bloom = new Bloom("bla");
bloom.setFilter(dba);
// Test that everything we put in passes.
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
Tuple t1 = tf.newTuple(2);
t1.set(0, i * 10 + j);
t1.set(1, strs[i][j]);
assertTrue(bloom.exec(t1));
}
}
// A few that don't pass
for (int i = 100; i < 10; i++) {
Tuple t1 = tf.newTuple(2);
t1.set(0, i);
t1.set(1, "ichabod");
assertFalse(bloom.exec(t1));
}
}
}