Java tutorial
/*********************************************************************************************************************** * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu) * * Licensed 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 eu.stratosphere.test.operators; import eu.stratosphere.api.common.Plan; import eu.stratosphere.api.java.record.operators.FileDataSink; import eu.stratosphere.api.java.record.operators.FileDataSource; import eu.stratosphere.api.java.record.functions.MapFunction; import eu.stratosphere.api.java.record.io.DelimitedInputFormat; import eu.stratosphere.api.java.record.operators.MapOperator; import eu.stratosphere.configuration.Configuration; import eu.stratosphere.test.operators.io.ContractITCaseIOFormats.ContractITCaseInputFormat; import eu.stratosphere.test.operators.io.ContractITCaseIOFormats.ContractITCaseOutputFormat; import eu.stratosphere.test.util.RecordAPITestBase; import eu.stratosphere.types.IntValue; import eu.stratosphere.types.Record; import eu.stratosphere.types.StringValue; import eu.stratosphere.util.Collector; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.junit.runner.RunWith; import org.junit.runners.Parameterized; import org.junit.runners.Parameterized.Parameters; import java.io.FileNotFoundException; import java.io.IOException; import java.io.Serializable; import java.util.Collection; import java.util.LinkedList; @RunWith(Parameterized.class) public class UnionITCase extends RecordAPITestBase { private static final Log LOG = LogFactory.getLog(UnionITCase.class); String inPath = null; String emptyInPath = null; String resultPath = null; public UnionITCase(Configuration testConfig) { super(testConfig); } private static final String IN = "1 1\n2 2\n2 8\n4 4\n4 4\n6 6\n7 7\n8 8\n1 1\n" + "2 2\n2 2\n4 4\n4 4\n6 3\n5 9\n8 8\n1 1\n2 2\n2 2\n3 0\n4 4\n5 9\n7 7\n8 8\n" + "1 1\n9 1\n5 9\n4 4\n4 4\n6 6\n7 7\n8 8\n"; private static final String RESULT = "1 11\n2 12\n4 14\n4 14\n1 11\n2 12\n2 12\n" + "4 14\n4 14\n3 16\n1 11\n2 12\n2 12\n0 13\n4 14\n1 11\n4 14\n4 14\n"; private static final String EMPTY_RESULT = ""; private static final String MAP_RESULT_TWICE = "1 11\n2 12\n4 14\n4 14\n1 11\n2 12\n2 12\n4 14\n4 14\n3 16\n1 11\n2 12\n2 12\n0 13\n4 14\n1 11\n4 14\n4 14\n" + "1 11\n2 12\n4 14\n4 14\n1 11\n2 12\n2 12\n4 14\n4 14\n3 16\n1 11\n2 12\n2 12\n0 13\n4 14\n1 11\n4 14\n4 14\n"; @Override protected void preSubmit() throws Exception { inPath = createTempFile("in.txt", IN); emptyInPath = createTempFile("empty_in.txt", ""); resultPath = getTempDirPath("result"); } public static class TestMapper extends MapFunction implements Serializable { private static final long serialVersionUID = 1L; private StringValue keyString = new StringValue(); private StringValue valueString = new StringValue(); @Override public void map(Record record, Collector<Record> out) throws Exception { keyString = record.getField(0, keyString); valueString = record.getField(1, valueString); if (LOG.isDebugEnabled()) LOG.debug("Processed: [" + keyString.toString() + "," + valueString.getValue() + "]"); if (Integer.parseInt(keyString.toString()) + Integer.parseInt(valueString.toString()) < 10) { record.setField(0, valueString); record.setField(1, new IntValue(Integer.parseInt(keyString.toString()) + 10)); out.collect(record); } } } @SuppressWarnings({ "deprecation", "unchecked" }) @Override protected Plan getTestJob() { String input1Path = config.getString("UnionTest#Input1Path", "").equals("empty") ? emptyInPath : inPath; String input2Path = config.getString("UnionTest#Input2Path", "").equals("empty") ? emptyInPath : inPath; FileDataSource input1 = new FileDataSource(new ContractITCaseInputFormat(), input1Path); DelimitedInputFormat.configureDelimitedFormat(input1).recordDelimiter('\n'); input1.setDegreeOfParallelism(config.getInteger("UnionTest#NoSubtasks", 1)); FileDataSource input2 = new FileDataSource(new ContractITCaseInputFormat(), input2Path); DelimitedInputFormat.configureDelimitedFormat(input2).recordDelimiter('\n'); input2.setDegreeOfParallelism(config.getInteger("UnionTest#NoSubtasks", 1)); MapOperator testMapper = MapOperator.builder(new TestMapper()).build(); testMapper.setDegreeOfParallelism(config.getInteger("UnionTest#NoSubtasks", 1)); FileDataSink output = new FileDataSink(new ContractITCaseOutputFormat(), resultPath); output.setDegreeOfParallelism(1); output.setInput(testMapper); testMapper.addInput(input1); testMapper.addInput(input2); return new Plan(output); } @Override protected void postSubmit() throws Exception { compareResultsByLinesInMemory(config.getString("UnionTest#ExpectedResult", ""), resultPath); } @Parameters public static Collection<Object[]> getConfigurations() throws FileNotFoundException, IOException { LinkedList<Configuration> testConfigs = new LinkedList<Configuration>(); //second input empty Configuration config = new Configuration(); config.setInteger("UnionTest#NoSubtasks", 4); config.setString("UnionTest#ExpectedResult", RESULT); config.setString("UnionTest#Input1Path", "non-empty"); config.setString("UnionTest#Input2Path", "empty"); testConfigs.add(config); //first input empty config = new Configuration(); config.setInteger("UnionTest#NoSubtasks", 4); config.setString("UnionTest#ExpectedResult", RESULT); config.setString("UnionTest#Input1Path", "empty"); config.setString("UnionTest#Input2Path", "non-empty"); testConfigs.add(config); //both inputs full config = new Configuration(); config.setInteger("UnionTest#NoSubtasks", 4); config.setString("UnionTest#ExpectedResult", MAP_RESULT_TWICE); config.setString("UnionTest#Input1Path", "non-empty"); config.setString("UnionTest#Input2Path", "non-empty"); testConfigs.add(config); //both inputs empty config = new Configuration(); config.setInteger("UnionTest#NoSubtasks", 4); config.setString("UnionTest#ExpectedResult", EMPTY_RESULT); config.setString("UnionTest#Input1Path", "empty"); config.setString("UnionTest#Input2Path", "empty"); testConfigs.add(config); return toParameterList(testConfigs); } }