Java tutorial
/** * 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.hcatalog.pig; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertTrue; import java.io.File; import java.io.IOException; import java.io.RandomAccessFile; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Properties; import org.apache.commons.io.FileUtils; import org.apache.hadoop.fs.FileUtil; import org.apache.hadoop.hive.cli.CliSessionState; import org.apache.hadoop.hive.conf.HiveConf; import org.apache.hadoop.hive.ql.CommandNeedRetryException; import org.apache.hadoop.hive.ql.Driver; import org.apache.hadoop.hive.ql.session.SessionState; import org.apache.hadoop.mapreduce.Job; import org.apache.hcatalog.HcatTestUtils; import org.apache.hcatalog.common.HCatConstants; import org.apache.hcatalog.data.Pair; import org.apache.pig.ExecType; import org.apache.pig.PigServer; import org.apache.pig.ResourceStatistics; import org.apache.pig.data.DataType; import org.apache.pig.data.Tuple; import org.apache.pig.impl.logicalLayer.schema.Schema; import org.apache.pig.impl.logicalLayer.schema.Schema.FieldSchema; import org.junit.After; import org.junit.Before; import org.junit.Test; /** * @deprecated Use/modify {@link org.apache.hive.hcatalog.pig.TestHCatLoader} instead */ public class TestHCatLoader { private static final String TEST_DATA_DIR = System.getProperty("java.io.tmpdir") + File.separator + TestHCatLoader.class.getCanonicalName() + "-" + System.currentTimeMillis(); private static final String TEST_WAREHOUSE_DIR = TEST_DATA_DIR + "/warehouse"; private static final String BASIC_FILE_NAME = TEST_DATA_DIR + "/basic.input.data"; private static final String COMPLEX_FILE_NAME = TEST_DATA_DIR + "/complex.input.data"; private static final String BASIC_TABLE = "junit_unparted_basic"; private static final String COMPLEX_TABLE = "junit_unparted_complex"; private static final String PARTITIONED_TABLE = "junit_parted_basic"; private static final String SPECIFIC_SIZE_TABLE = "junit_specific_size"; private Driver driver; private Map<Integer, Pair<Integer, String>> basicInputData; protected String storageFormat() { return "RCFILE tblproperties('hcat.isd'='org.apache.hcatalog.rcfile.RCFileInputDriver'," + "'hcat.osd'='org.apache.hcatalog.rcfile.RCFileOutputDriver')"; } private void dropTable(String tablename) throws IOException, CommandNeedRetryException { driver.run("drop table " + tablename); } private void createTable(String tablename, String schema, String partitionedBy) throws IOException, CommandNeedRetryException { String createTable; createTable = "create table " + tablename + "(" + schema + ") "; if ((partitionedBy != null) && (!partitionedBy.trim().isEmpty())) { createTable = createTable + "partitioned by (" + partitionedBy + ") "; } createTable = createTable + "stored as " + storageFormat(); int retCode = driver.run(createTable).getResponseCode(); if (retCode != 0) { throw new IOException("Failed to create table. [" + createTable + "], return code from hive driver : [" + retCode + "]"); } } private void createTable(String tablename, String schema) throws IOException, CommandNeedRetryException { createTable(tablename, schema, null); } @Before public void setup() throws Exception { File f = new File(TEST_WAREHOUSE_DIR); if (f.exists()) { FileUtil.fullyDelete(f); } if (!(new File(TEST_WAREHOUSE_DIR).mkdirs())) { throw new RuntimeException("Could not create " + TEST_WAREHOUSE_DIR); } HiveConf hiveConf = new HiveConf(this.getClass()); hiveConf.set(HiveConf.ConfVars.PREEXECHOOKS.varname, ""); hiveConf.set(HiveConf.ConfVars.POSTEXECHOOKS.varname, ""); hiveConf.set(HiveConf.ConfVars.HIVE_SUPPORT_CONCURRENCY.varname, "false"); hiveConf.set(HiveConf.ConfVars.METASTOREWAREHOUSE.varname, TEST_WAREHOUSE_DIR); driver = new Driver(hiveConf); SessionState.start(new CliSessionState(hiveConf)); createTable(BASIC_TABLE, "a int, b string"); createTable(COMPLEX_TABLE, "name string, studentid int, " + "contact struct<phno:string,email:string>, " + "currently_registered_courses array<string>, " + "current_grades map<string,string>, " + "phnos array<struct<phno:string,type:string>>"); createTable(PARTITIONED_TABLE, "a int, b string", "bkt string"); createTable(SPECIFIC_SIZE_TABLE, "a int, b string"); int LOOP_SIZE = 3; String[] input = new String[LOOP_SIZE * LOOP_SIZE]; basicInputData = new HashMap<Integer, Pair<Integer, String>>(); int k = 0; for (int i = 1; i <= LOOP_SIZE; i++) { String si = i + ""; for (int j = 1; j <= LOOP_SIZE; j++) { String sj = "S" + j + "S"; input[k] = si + "\t" + sj; basicInputData.put(k, new Pair<Integer, String>(i, sj)); k++; } } HcatTestUtils.createTestDataFile(BASIC_FILE_NAME, input); HcatTestUtils.createTestDataFile(COMPLEX_FILE_NAME, new String[] { //"Henry Jekyll\t42\t(415-253-6367,hjekyll@contemporary.edu.uk)\t{(PHARMACOLOGY),(PSYCHIATRY)},[PHARMACOLOGY#A-,PSYCHIATRY#B+],{(415-253-6367,cell),(408-253-6367,landline)}", //"Edward Hyde\t1337\t(415-253-6367,anonymous@b44chan.org)\t{(CREATIVE_WRITING),(COPYRIGHT_LAW)},[CREATIVE_WRITING#A+,COPYRIGHT_LAW#D],{(415-253-6367,cell),(408-253-6367,landline)}", }); PigServer server = new PigServer(ExecType.LOCAL); server.setBatchOn(); server.registerQuery("A = load '" + BASIC_FILE_NAME + "' as (a:int, b:chararray);"); server.registerQuery("store A into '" + BASIC_TABLE + "' using org.apache.hcatalog.pig.HCatStorer();"); server.registerQuery( "store A into '" + SPECIFIC_SIZE_TABLE + "' using org.apache.hcatalog.pig.HCatStorer();"); server.registerQuery("B = foreach A generate a,b;"); server.registerQuery("B2 = filter B by a < 2;"); server.registerQuery( "store B2 into '" + PARTITIONED_TABLE + "' using org.apache.hcatalog.pig.HCatStorer('bkt=0');"); server.registerQuery("C = foreach A generate a,b;"); server.registerQuery("C2 = filter C by a >= 2;"); server.registerQuery( "store C2 into '" + PARTITIONED_TABLE + "' using org.apache.hcatalog.pig.HCatStorer('bkt=1');"); server.registerQuery("D = load '" + COMPLEX_FILE_NAME + "' as (name:chararray, studentid:int, contact:tuple(phno:chararray,email:chararray), currently_registered_courses:bag{innertup:tuple(course:chararray)}, current_grades:map[ ] , phnos :bag{innertup:tuple(phno:chararray,type:chararray)});"); server.registerQuery("store D into '" + COMPLEX_TABLE + "' using org.apache.hcatalog.pig.HCatStorer();"); server.executeBatch(); } @After public void tearDown() throws Exception { try { dropTable(BASIC_TABLE); dropTable(COMPLEX_TABLE); dropTable(PARTITIONED_TABLE); dropTable(SPECIFIC_SIZE_TABLE); } finally { FileUtils.deleteDirectory(new File(TEST_DATA_DIR)); } } public void testSchemaLoadBasic() throws IOException { PigServer server = new PigServer(ExecType.LOCAL); // test that schema was loaded correctly server.registerQuery("X = load '" + BASIC_TABLE + "' using org.apache.hcatalog.pig.HCatLoader();"); Schema dumpedXSchema = server.dumpSchema("X"); List<FieldSchema> Xfields = dumpedXSchema.getFields(); assertEquals(2, Xfields.size()); assertTrue(Xfields.get(0).alias.equalsIgnoreCase("a")); assertTrue(Xfields.get(0).type == DataType.INTEGER); assertTrue(Xfields.get(1).alias.equalsIgnoreCase("b")); assertTrue(Xfields.get(1).type == DataType.CHARARRAY); } @Test public void testReadDataBasic() throws IOException { PigServer server = new PigServer(ExecType.LOCAL); server.registerQuery("X = load '" + BASIC_TABLE + "' using org.apache.hcatalog.pig.HCatLoader();"); Iterator<Tuple> XIter = server.openIterator("X"); int numTuplesRead = 0; while (XIter.hasNext()) { Tuple t = XIter.next(); assertEquals(2, t.size()); assertTrue(t.get(0).getClass() == Integer.class); assertTrue(t.get(1).getClass() == String.class); assertEquals(t.get(0), basicInputData.get(numTuplesRead).first); assertEquals(t.get(1), basicInputData.get(numTuplesRead).second); numTuplesRead++; } assertEquals(basicInputData.size(), numTuplesRead); } @Test public void testSchemaLoadComplex() throws IOException { PigServer server = new PigServer(ExecType.LOCAL); // test that schema was loaded correctly server.registerQuery("K = load '" + COMPLEX_TABLE + "' using org.apache.hcatalog.pig.HCatLoader();"); Schema dumpedKSchema = server.dumpSchema("K"); List<FieldSchema> Kfields = dumpedKSchema.getFields(); assertEquals(6, Kfields.size()); assertEquals(DataType.CHARARRAY, Kfields.get(0).type); assertEquals("name", Kfields.get(0).alias.toLowerCase()); assertEquals(DataType.INTEGER, Kfields.get(1).type); assertEquals("studentid", Kfields.get(1).alias.toLowerCase()); assertEquals(DataType.TUPLE, Kfields.get(2).type); assertEquals("contact", Kfields.get(2).alias.toLowerCase()); { assertNotNull(Kfields.get(2).schema); assertTrue(Kfields.get(2).schema.getFields().size() == 2); assertTrue(Kfields.get(2).schema.getFields().get(0).type == DataType.CHARARRAY); assertTrue(Kfields.get(2).schema.getFields().get(0).alias.equalsIgnoreCase("phno")); assertTrue(Kfields.get(2).schema.getFields().get(1).type == DataType.CHARARRAY); assertTrue(Kfields.get(2).schema.getFields().get(1).alias.equalsIgnoreCase("email")); } assertEquals(DataType.BAG, Kfields.get(3).type); assertEquals("currently_registered_courses", Kfields.get(3).alias.toLowerCase()); { assertNotNull(Kfields.get(3).schema); assertEquals(1, Kfields.get(3).schema.getFields().size()); assertEquals(DataType.TUPLE, Kfields.get(3).schema.getFields().get(0).type); assertNotNull(Kfields.get(3).schema.getFields().get(0).schema); assertEquals(1, Kfields.get(3).schema.getFields().get(0).schema.getFields().size()); assertEquals(DataType.CHARARRAY, Kfields.get(3).schema.getFields().get(0).schema.getFields().get(0).type); // assertEquals("course",Kfields.get(3).schema.getFields().get(0).schema.getFields().get(0).alias.toLowerCase()); // commented out, because the name becomes "innerfield" by default - we call it "course" in pig, // but in the metadata, it'd be anonymous, so this would be autogenerated, which is fine } assertEquals(DataType.MAP, Kfields.get(4).type); assertEquals("current_grades", Kfields.get(4).alias.toLowerCase()); assertEquals(DataType.BAG, Kfields.get(5).type); assertEquals("phnos", Kfields.get(5).alias.toLowerCase()); { assertNotNull(Kfields.get(5).schema); assertEquals(1, Kfields.get(5).schema.getFields().size()); assertEquals(DataType.TUPLE, Kfields.get(5).schema.getFields().get(0).type); assertNotNull(Kfields.get(5).schema.getFields().get(0).schema); assertTrue(Kfields.get(5).schema.getFields().get(0).schema.getFields().size() == 2); assertEquals(DataType.CHARARRAY, Kfields.get(5).schema.getFields().get(0).schema.getFields().get(0).type); assertEquals("phno", Kfields.get(5).schema.getFields().get(0).schema.getFields().get(0).alias.toLowerCase()); assertEquals(DataType.CHARARRAY, Kfields.get(5).schema.getFields().get(0).schema.getFields().get(1).type); assertEquals("type", Kfields.get(5).schema.getFields().get(0).schema.getFields().get(1).alias.toLowerCase()); } } @Test public void testReadPartitionedBasic() throws IOException, CommandNeedRetryException { PigServer server = new PigServer(ExecType.LOCAL); driver.run("select * from " + PARTITIONED_TABLE); ArrayList<String> valuesReadFromHiveDriver = new ArrayList<String>(); driver.getResults(valuesReadFromHiveDriver); assertEquals(basicInputData.size(), valuesReadFromHiveDriver.size()); server.registerQuery("W = load '" + PARTITIONED_TABLE + "' using org.apache.hcatalog.pig.HCatLoader();"); Schema dumpedWSchema = server.dumpSchema("W"); List<FieldSchema> Wfields = dumpedWSchema.getFields(); assertEquals(3, Wfields.size()); assertTrue(Wfields.get(0).alias.equalsIgnoreCase("a")); assertTrue(Wfields.get(0).type == DataType.INTEGER); assertTrue(Wfields.get(1).alias.equalsIgnoreCase("b")); assertTrue(Wfields.get(1).type == DataType.CHARARRAY); assertTrue(Wfields.get(2).alias.equalsIgnoreCase("bkt")); assertTrue(Wfields.get(2).type == DataType.CHARARRAY); Iterator<Tuple> WIter = server.openIterator("W"); Collection<Pair<Integer, String>> valuesRead = new ArrayList<Pair<Integer, String>>(); while (WIter.hasNext()) { Tuple t = WIter.next(); assertTrue(t.size() == 3); assertTrue(t.get(0).getClass() == Integer.class); assertTrue(t.get(1).getClass() == String.class); assertTrue(t.get(2).getClass() == String.class); valuesRead.add(new Pair<Integer, String>((Integer) t.get(0), (String) t.get(1))); if ((Integer) t.get(0) < 2) { assertEquals("0", t.get(2)); } else { assertEquals("1", t.get(2)); } } assertEquals(valuesReadFromHiveDriver.size(), valuesRead.size()); server.registerQuery("P1 = load '" + PARTITIONED_TABLE + "' using org.apache.hcatalog.pig.HCatLoader();"); server.registerQuery("P1filter = filter P1 by bkt == '0';"); Iterator<Tuple> P1Iter = server.openIterator("P1filter"); int count1 = 0; while (P1Iter.hasNext()) { Tuple t = P1Iter.next(); assertEquals("0", t.get(2)); assertEquals(1, t.get(0)); count1++; } assertEquals(3, count1); server.registerQuery("P2 = load '" + PARTITIONED_TABLE + "' using org.apache.hcatalog.pig.HCatLoader();"); server.registerQuery("P2filter = filter P2 by bkt == '1';"); Iterator<Tuple> P2Iter = server.openIterator("P2filter"); int count2 = 0; while (P2Iter.hasNext()) { Tuple t = P2Iter.next(); assertEquals("1", t.get(2)); assertTrue(((Integer) t.get(0)) > 1); count2++; } assertEquals(6, count2); } @Test public void testProjectionsBasic() throws IOException { PigServer server = new PigServer(ExecType.LOCAL); // projections are handled by using generate, not "as" on the Load server.registerQuery("Y1 = load '" + BASIC_TABLE + "' using org.apache.hcatalog.pig.HCatLoader();"); server.registerQuery("Y2 = foreach Y1 generate a;"); server.registerQuery("Y3 = foreach Y1 generate b,a;"); Schema dumpedY2Schema = server.dumpSchema("Y2"); Schema dumpedY3Schema = server.dumpSchema("Y3"); List<FieldSchema> Y2fields = dumpedY2Schema.getFields(); List<FieldSchema> Y3fields = dumpedY3Schema.getFields(); assertEquals(1, Y2fields.size()); assertEquals("a", Y2fields.get(0).alias.toLowerCase()); assertEquals(DataType.INTEGER, Y2fields.get(0).type); assertEquals(2, Y3fields.size()); assertEquals("b", Y3fields.get(0).alias.toLowerCase()); assertEquals(DataType.CHARARRAY, Y3fields.get(0).type); assertEquals("a", Y3fields.get(1).alias.toLowerCase()); assertEquals(DataType.INTEGER, Y3fields.get(1).type); int numTuplesRead = 0; Iterator<Tuple> Y2Iter = server.openIterator("Y2"); while (Y2Iter.hasNext()) { Tuple t = Y2Iter.next(); assertEquals(t.size(), 1); assertTrue(t.get(0).getClass() == Integer.class); assertEquals(t.get(0), basicInputData.get(numTuplesRead).first); numTuplesRead++; } numTuplesRead = 0; Iterator<Tuple> Y3Iter = server.openIterator("Y3"); while (Y3Iter.hasNext()) { Tuple t = Y3Iter.next(); assertEquals(t.size(), 2); assertTrue(t.get(0).getClass() == String.class); assertEquals(t.get(0), basicInputData.get(numTuplesRead).second); assertTrue(t.get(1).getClass() == Integer.class); assertEquals(t.get(1), basicInputData.get(numTuplesRead).first); numTuplesRead++; } assertEquals(basicInputData.size(), numTuplesRead); } @Test public void testGetInputBytes() throws Exception { File file = new File(TEST_WAREHOUSE_DIR + "/" + SPECIFIC_SIZE_TABLE + "/part-m-00000"); file.deleteOnExit(); RandomAccessFile randomAccessFile = new RandomAccessFile(file, "rw"); randomAccessFile.setLength(2L * 1024 * 1024 * 1024); randomAccessFile.close(); Job job = new Job(); HCatLoader hCatLoader = new HCatLoader(); hCatLoader.setUDFContextSignature("testGetInputBytes"); hCatLoader.setLocation(SPECIFIC_SIZE_TABLE, job); ResourceStatistics statistics = hCatLoader.getStatistics(file.getAbsolutePath(), job); assertEquals(2048, (long) statistics.getmBytes()); } @Test public void testConvertBooleanToInt() throws Exception { String tbl = "test_convert_boolean_to_int"; String inputFileName = TEST_DATA_DIR + "/testConvertBooleanToInt/data.txt"; File inputDataDir = new File(inputFileName).getParentFile(); inputDataDir.mkdir(); String[] lines = new String[] { "llama\t1", "alpaca\t0" }; HcatTestUtils.createTestDataFile(inputFileName, lines); assertEquals(0, driver.run("drop table if exists " + tbl).getResponseCode()); assertEquals(0, driver.run("create external table " + tbl + " (a string, b boolean) row format delimited fields terminated by '\t'" + " stored as textfile location 'file://" + inputDataDir.getAbsolutePath() + "'") .getResponseCode()); Properties properties = new Properties(); properties.setProperty(HCatConstants.HCAT_DATA_CONVERT_BOOLEAN_TO_INTEGER, "true"); PigServer server = new PigServer(ExecType.LOCAL, properties); server.registerQuery( "data = load 'test_convert_boolean_to_int' using org.apache.hcatalog.pig.HCatLoader();"); Schema schema = server.dumpSchema("data"); assertEquals(2, schema.getFields().size()); assertEquals("a", schema.getField(0).alias); assertEquals(DataType.CHARARRAY, schema.getField(0).type); assertEquals("b", schema.getField(1).alias); assertEquals(DataType.INTEGER, schema.getField(1).type); Iterator<Tuple> iterator = server.openIterator("data"); Tuple t = iterator.next(); assertEquals("llama", t.get(0)); // TODO: Figure out how to load a text file into Hive with boolean columns. This next assert // passes because data was loaded as integers, not because it was converted. assertEquals(1, t.get(1)); t = iterator.next(); assertEquals("alpaca", t.get(0)); assertEquals(0, t.get(1)); assertFalse(iterator.hasNext()); } }