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.CrossFunction; import eu.stratosphere.api.java.record.io.DelimitedInputFormat; import eu.stratosphere.api.java.record.operators.CrossOperator; import eu.stratosphere.compiler.PactCompiler; 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 CrossITCase extends RecordAPITestBase { private static final Log LOG = LogFactory.getLog(CrossITCase.class); String leftInPath = null; String rightInPath = null; String resultPath = null; public CrossITCase(Configuration testConfig) { super(testConfig); } private static final String LEFT_IN = "1 1\n2 2\n1 1\n2 2\n3 3\n4 4\n3 3\n4 4\n"; private static final String RIGHT_IN = "1 1\n1 2\n2 2\n2 4\n3 3\n3 6\n4 4\n4 8\n"; private static final String RESULT = "4 1\n4 1\n4 2\n4 2\n5 2\n5 2\n5 4\n5 4\n6 3\n6 3\n7 4\n7 4\n" + "5 0\n5 0\n5 1\n5 1\n6 1\n6 1\n6 3\n6 3\n7 2\n7 2\n8 3\n8 3\n" + "6 -1\n6 -1\n6 0\n6 0\n7 0\n7 0\n8 1\n8 1\n" + "7 -2\n7 -2\n7 -1\n7 -1\n8 -1\n8 -1\n"; @Override protected void preSubmit() throws Exception { leftInPath = createTempFile("left_in.txt", LEFT_IN); rightInPath = createTempFile("right_in.txt", RIGHT_IN); resultPath = getTempDirPath("result"); } public static class TestCross extends CrossFunction implements Serializable { private static final long serialVersionUID = 1L; private StringValue string = new StringValue(); private IntValue integer = new IntValue(); @Override public void cross(Record record1, Record record2, Collector<Record> out) { string = record1.getField(1, string); int val1 = Integer.parseInt(string.toString()); string = record2.getField(1, string); int val2 = Integer.parseInt(string.toString()); string = record1.getField(0, string); int key1 = Integer.parseInt(string.toString()); string = record2.getField(0, string); int key2 = Integer.parseInt(string.toString()); LOG.debug("Processing { [" + key1 + "," + val1 + "] , [" + key2 + "," + val2 + "] }"); if (val1 + val2 <= 6) { string.setValue((key1 + key2 + 2) + ""); integer.setValue(val2 - val1 + 1); record1.setField(0, string); record1.setField(1, integer); out.collect(record1); } } } @Override protected Plan getTestJob() { FileDataSource input_left = new FileDataSource(new ContractITCaseInputFormat(), leftInPath); DelimitedInputFormat.configureDelimitedFormat(input_left).recordDelimiter('\n'); input_left.setDegreeOfParallelism(config.getInteger("CrossTest#NoSubtasks", 1)); FileDataSource input_right = new FileDataSource(new ContractITCaseInputFormat(), rightInPath); DelimitedInputFormat.configureDelimitedFormat(input_right).recordDelimiter('\n'); input_right.setDegreeOfParallelism(config.getInteger("CrossTest#NoSubtasks", 1)); CrossOperator testCross = CrossOperator.builder(new TestCross()).build(); testCross.setDegreeOfParallelism(config.getInteger("CrossTest#NoSubtasks", 1)); testCross.getParameters().setString(PactCompiler.HINT_LOCAL_STRATEGY, config.getString("CrossTest#LocalStrategy", "")); if (config.getString("CrossTest#ShipStrategy", "").equals("BROADCAST_FIRST")) { testCross.getParameters().setString(PactCompiler.HINT_SHIP_STRATEGY_FIRST_INPUT, PactCompiler.HINT_SHIP_STRATEGY_BROADCAST); testCross.getParameters().setString(PactCompiler.HINT_SHIP_STRATEGY_SECOND_INPUT, PactCompiler.HINT_SHIP_STRATEGY_FORWARD); } else if (config.getString("CrossTest#ShipStrategy", "").equals("BROADCAST_SECOND")) { testCross.getParameters().setString(PactCompiler.HINT_SHIP_STRATEGY_FIRST_INPUT, PactCompiler.HINT_SHIP_STRATEGY_BROADCAST); testCross.getParameters().setString(PactCompiler.HINT_SHIP_STRATEGY_SECOND_INPUT, PactCompiler.HINT_SHIP_STRATEGY_FORWARD); } else { testCross.getParameters().setString(PactCompiler.HINT_SHIP_STRATEGY, config.getString("CrossTest#ShipStrategy", "")); } FileDataSink output = new FileDataSink(new ContractITCaseOutputFormat(), resultPath); output.setDegreeOfParallelism(1); output.setInput(testCross); testCross.setFirstInput(input_left); testCross.setSecondInput(input_right); return new Plan(output); } @Override protected void postSubmit() throws Exception { compareResultsByLinesInMemory(RESULT, resultPath); } @Parameters public static Collection<Object[]> getConfigurations() throws FileNotFoundException, IOException { LinkedList<Configuration> tConfigs = new LinkedList<Configuration>(); String[] localStrategies = { PactCompiler.HINT_LOCAL_STRATEGY_NESTEDLOOP_BLOCKED_OUTER_FIRST, PactCompiler.HINT_LOCAL_STRATEGY_NESTEDLOOP_BLOCKED_OUTER_SECOND, PactCompiler.HINT_LOCAL_STRATEGY_NESTEDLOOP_STREAMED_OUTER_FIRST, PactCompiler.HINT_LOCAL_STRATEGY_NESTEDLOOP_STREAMED_OUTER_SECOND }; String[] shipStrategies = { "BROADCAST_FIRST", "BROADCAST_SECOND" // PactCompiler.HINT_SHIP_STRATEGY_BROADCAST // PactCompiler.HINT_SHIP_STRATEGY_SFR }; for (String localStrategy : localStrategies) { for (String shipStrategy : shipStrategies) { Configuration config = new Configuration(); config.setString("CrossTest#LocalStrategy", localStrategy); config.setString("CrossTest#ShipStrategy", shipStrategy); config.setInteger("CrossTest#NoSubtasks", 4); tConfigs.add(config); } } return toParameterList(tConfigs); } }