| /* |
| * 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.apache.pig.builtin.mock.Storage.resetData; |
| import static org.apache.pig.builtin.mock.Storage.tuple; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Random; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.pig.ExecType; |
| import org.apache.pig.PigServer; |
| import org.apache.pig.builtin.mock.Storage.Data; |
| import org.apache.pig.data.DataType; |
| import org.apache.pig.data.Tuple; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import com.google.common.collect.Lists; |
| |
| /** |
| * Testcase aimed at testing pig with large file sizes and filter and group functions |
| */ |
| public class TestPi { |
| |
| private final Log log = LogFactory.getLog(getClass()); |
| |
| private long defaultBlockSize = (new Configuration()).getLong("dfs.block.size", 0); |
| |
| private long total = ((defaultBlockSize >> 20) / 10) << 20; |
| private int inCircle = 0; |
| |
| private long totalLength = 0, totalLengthTest = 0; |
| |
| PigServer pig; |
| String fileName, tmpFile1; |
| |
| @Before |
| public void setUp() throws Exception{ |
| |
| log.info("Generating test data..."); |
| log.info("Default block size = " + defaultBlockSize); |
| log.info("Total no. of iterations to run for test data = " + total); |
| |
| Random rand = new Random(); |
| |
| pig = new PigServer(ExecType.LOCAL); |
| Data data = resetData(pig); |
| List<Tuple> theInput = Lists.newArrayList(); |
| |
| for(int i = 0; i < total; i++) { |
| Double x = new Double(rand.nextDouble()); |
| Double y = new Double(rand.nextDouble()); |
| double x1 = x.doubleValue() - 0.5; |
| double y1 = y.doubleValue() - 0.5; |
| double sq_dist = (x1*x1) + (y1*y1); |
| if(sq_dist <= 0.25) { |
| inCircle ++; |
| |
| } |
| |
| theInput.add(tuple(x, y)); |
| |
| totalLength += String.valueOf(sq_dist).length(); |
| } |
| data.set("foo", theInput); |
| } |
| |
| @Test |
| public void testPi() throws Exception { |
| |
| pig.registerQuery("A = load 'foo' using mock.Storage() as (x:double, y:double);"); |
| pig.registerQuery("B = foreach A generate $0 - 0.5 as d1, $1 - 0.5 as d2;"); |
| pig.registerQuery("C = foreach B generate $0 * $0 as m1, $1 * $1 as m2;"); |
| pig.registerQuery("D = foreach C generate $0 + $1 as s1;"); |
| pig.registerQuery("D = foreach D generate $0, ARITY($0);"); |
| |
| pig.registerQuery("E = filter D by $0 <= 0.25;"); |
| |
| pig.registerQuery("F = cogroup D by $1, E by $1;"); |
| pig.registerQuery("G = foreach F generate COUNT($1) as total, COUNT($2) as in_circle;"); |
| |
| Iterator<Tuple> values = pig.openIterator("G"); |
| assertTrue(values.hasNext()); |
| Tuple finalValues = values.next(); |
| int totalPoints = DataType.toInteger(finalValues.get(0)); |
| int inCirclePoints = DataType.toInteger(finalValues.get(1)); |
| |
| log.info("Value of PI = " + 4 * (double)inCircle / (double)total); |
| log.info("Value of PI (From Test data) = " + 4 * (double)inCirclePoints / (double)totalPoints); |
| |
| |
| Iterator<Tuple> lengthTest = pig.openIterator("D"); |
| |
| while(lengthTest.hasNext()) { |
| Tuple temp = lengthTest.next(); |
| totalLengthTest += temp.get(0).toString().length(); |
| } |
| |
| assertEquals(totalPoints, total); |
| assertEquals(inCirclePoints, inCircle); |
| assertEquals(totalLengthTest, totalLength); |
| } |
| } |