| /* |
| * 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 java.io.File; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.util.Iterator; |
| |
| import junit.framework.TestCase; |
| |
| import org.apache.pig.ExecType; |
| import org.apache.pig.PigServer; |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.data.Tuple; |
| import org.junit.After; |
| import org.junit.AfterClass; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| @RunWith(JUnit4.class) |
| public class TestPoissonSampleLoader extends TestCase{ |
| private static final String INPUT_FILE1 = "SkewedJoinInput1.txt"; |
| |
| private PigServer pigServer; |
| private static MiniCluster cluster = MiniCluster.buildCluster(); |
| |
| public TestPoissonSampleLoader() throws ExecException, IOException{ |
| pigServer = new PigServer(ExecType.LOCAL); |
| pigServer.getPigContext().getProperties().setProperty("pig.skewedjoin.reduce.maxtuple", "5"); |
| pigServer.getPigContext().getProperties().setProperty("pig.skewedjoin.reduce.memusage", "0.0001"); |
| pigServer.getPigContext().getProperties().setProperty("mapred.child.java.opts", "-Xmx512m"); |
| |
| pigServer.getPigContext().getProperties().setProperty("pig.mapsplits.count", "5"); |
| } |
| |
| |
| @Before |
| public void setUp() throws Exception { |
| createFiles(); |
| } |
| |
| @AfterClass |
| public static void oneTimeTearDown() throws Exception { |
| cluster.shutDown(); |
| } |
| |
| private void createFiles() throws IOException { |
| PrintWriter w = new PrintWriter(new FileWriter(INPUT_FILE1)); |
| |
| int k = 0; |
| for(int j=0; j<100; j++) { |
| w.println("100:apple1:aaa" + k); |
| k++; |
| w.println("200:orange1:bbb" + k); |
| k++; |
| w.println("300:strawberry:ccc" + k); |
| k++; |
| } |
| |
| w.close(); |
| |
| Util.copyFromLocalToCluster(cluster, INPUT_FILE1, INPUT_FILE1); |
| } |
| |
| |
| @After |
| public void tearDown() throws Exception { |
| new File(INPUT_FILE1).delete(); |
| |
| Util.deleteFile(cluster, INPUT_FILE1); |
| } |
| |
| private int testNumSamples(String memUsage, String sampleRate) throws IOException { |
| pigServer.getPigContext().getProperties().setProperty("pig.skewedjoin.reduce.memusage", memUsage); |
| pigServer.getPigContext().getProperties().setProperty("pig.sksampler.samplerate", sampleRate); |
| pigServer.registerQuery("A = Load '"+INPUT_FILE1+"' Using PoissonSampleLoader('PigStorage()', '100');"); |
| Iterator<Tuple> iter = pigServer.openIterator("A"); |
| int count = 0; |
| while(iter.hasNext()){ |
| count++; |
| iter.next(); |
| } |
| return count; |
| } |
| /* |
| // This test has been removed because the results are platform dependent. |
| // See: PIG-2926 |
| @Test |
| public void testNumSamples() throws IOException { |
| //PoissonSampleLoader.DEFAULT_SAMPLE_RATE is 17 |
| int count = testNumSamples("0.0001", "17"); |
| assertEquals(count, 12); |
| |
| count = testNumSamples("0.001", "17"); |
| assertEquals(count, 6); |
| |
| count = testNumSamples("0.001", "10"); |
| assertEquals(count, 4); |
| |
| count = testNumSamples("0.001", "100"); |
| assertEquals(count, 9); |
| |
| count = testNumSamples("0.005", "17"); |
| assertEquals(count, 2); |
| |
| count = testNumSamples("0.0001", "100"); |
| assertEquals(count, 42); |
| } |
| */ |
| /* |
| * Test use of LoadFunc with parameters as argument to PoissonSampleLoader |
| */ |
| @Test |
| public void testInstantiation() throws IOException { |
| pigServer.registerQuery("A = Load '"+INPUT_FILE1+"' Using PoissonSampleLoader('PigStorage(\\\\\\':\\\\\\')', '100');"); |
| Iterator<Tuple> iter = pigServer.openIterator("A"); |
| assertTrue(iter.hasNext()); |
| |
| Tuple t = iter.next(); |
| //Check the tuple size. It has to be 3. |
| assertEquals(3, t.size()); |
| |
| while(iter.hasNext()){ |
| t = iter.next(); |
| } |
| // Last tuple's size has to be 5 |
| // 3 datum (ex: 100:apple1:aaa) |
| // + PoissonSampleLoader.NUMROWS_TUPLE_MARKER ??_pig_inTeRnal-spEcial_roW_num_tuple3kt579CFLehkblah |
| // + numRow 300 |
| assertEquals(5, t.size()); |
| } |
| |
| } |