Java tutorial
/*********************************************************************************************************************** * * Copyright (C) 2010 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.pact.runtime.task; import java.util.ArrayList; import junit.framework.Assert; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.junit.Test; import eu.stratosphere.pact.common.stubs.Collector; import eu.stratosphere.pact.common.stubs.MatchStub; import eu.stratosphere.pact.common.type.Key; import eu.stratosphere.pact.common.type.PactRecord; import eu.stratosphere.pact.common.type.base.PactInteger; import eu.stratosphere.pact.runtime.plugable.PactRecordComparatorFactory; import eu.stratosphere.pact.runtime.task.util.TaskConfig.LocalStrategy; import eu.stratosphere.pact.runtime.test.util.UniformPactRecordGenerator; import eu.stratosphere.pact.runtime.test.util.TaskTestBase; public class MatchTaskExternalITCase extends TaskTestBase { private static final Log LOG = LogFactory.getLog(MatchTaskExternalITCase.class); private final ArrayList<PactRecord> outList = new ArrayList<PactRecord>(); @Test public void testExternalSort1MatchTask() { int keyCnt1 = 16384 * 2; int valCnt1 = 2; int keyCnt2 = 8192; int valCnt2 = 4 * 2; super.initEnvironment(6 * 1024 * 1024); super.addInput(new UniformPactRecordGenerator(keyCnt1, valCnt1, false), 1); super.addInput(new UniformPactRecordGenerator(keyCnt2, valCnt2, false), 2); super.addOutput(this.outList); final MatchTask<PactRecord, PactRecord, PactRecord> testTask = new MatchTask<PactRecord, PactRecord, PactRecord>(); super.getTaskConfig().setLocalStrategy(LocalStrategy.SORT_BOTH_MERGE); super.getTaskConfig().setMemorySize(6 * 1024 * 1024); super.getTaskConfig().setNumFilehandles(4); final int[] keyPos1 = new int[] { 0 }; final int[] keyPos2 = new int[] { 0 }; @SuppressWarnings("unchecked") final Class<? extends Key>[] keyClasses = (Class<? extends Key>[]) new Class[] { PactInteger.class }; PactRecordComparatorFactory.writeComparatorSetupToConfig(super.getTaskConfig().getConfiguration(), super.getTaskConfig().getPrefixForInputParameters(0), keyPos1, keyClasses); PactRecordComparatorFactory.writeComparatorSetupToConfig(super.getTaskConfig().getConfiguration(), super.getTaskConfig().getPrefixForInputParameters(1), keyPos2, keyClasses); super.registerTask(testTask, MockMatchStub.class); try { testTask.invoke(); } catch (Exception e) { LOG.debug(e); Assert.fail("Invoke method caused exception."); } int expCnt = valCnt1 * valCnt2 * Math.min(keyCnt1, keyCnt2); Assert.assertTrue("Resultset size was " + this.outList.size() + ". Expected was " + expCnt, this.outList.size() == expCnt); this.outList.clear(); } @Test public void testExternalHash1MatchTask() { int keyCnt1 = 32768; int valCnt1 = 8; int keyCnt2 = 65536; int valCnt2 = 8; int expCnt = valCnt1 * valCnt2 * Math.min(keyCnt1, keyCnt2); this.outList.ensureCapacity(expCnt); super.initEnvironment(4 * 1024 * 1024); super.addInput(new UniformPactRecordGenerator(keyCnt1, valCnt1, false), 1); super.addInput(new UniformPactRecordGenerator(keyCnt2, valCnt2, false), 2); super.addOutput(outList); final MatchTask<PactRecord, PactRecord, PactRecord> testTask = new MatchTask<PactRecord, PactRecord, PactRecord>(); super.getTaskConfig().setMemorySize(4 * 1024 * 1024); super.getTaskConfig().setLocalStrategy(LocalStrategy.HYBRIDHASH_FIRST); final int[] keyPos1 = new int[] { 0 }; final int[] keyPos2 = new int[] { 0 }; @SuppressWarnings("unchecked") final Class<? extends Key>[] keyClasses = (Class<? extends Key>[]) new Class[] { PactInteger.class }; PactRecordComparatorFactory.writeComparatorSetupToConfig(super.getTaskConfig().getConfiguration(), super.getTaskConfig().getPrefixForInputParameters(0), keyPos1, keyClasses); PactRecordComparatorFactory.writeComparatorSetupToConfig(super.getTaskConfig().getConfiguration(), super.getTaskConfig().getPrefixForInputParameters(1), keyPos2, keyClasses); super.registerTask(testTask, MockMatchStub.class); try { testTask.invoke(); } catch (Exception e) { LOG.debug(e); e.printStackTrace(); Assert.fail("Invoke method caused exception."); } Assert.assertTrue("Resultset size was " + outList.size() + ". Expected was " + expCnt, outList.size() == expCnt); outList.clear(); } @Test public void testExternalHash2MatchTask() { int keyCnt1 = 32768; int valCnt1 = 8; int keyCnt2 = 65536; int valCnt2 = 8; super.initEnvironment(4 * 1024 * 1024); super.addInput(new UniformPactRecordGenerator(keyCnt1, valCnt1, false), 1); super.addInput(new UniformPactRecordGenerator(keyCnt2, valCnt2, false), 2); super.addOutput(outList); final MatchTask<PactRecord, PactRecord, PactRecord> testTask = new MatchTask<PactRecord, PactRecord, PactRecord>(); super.getTaskConfig().setMemorySize(4 * 1024 * 1024); super.getTaskConfig().setLocalStrategy(LocalStrategy.HYBRIDHASH_SECOND); final int[] keyPos1 = new int[] { 0 }; final int[] keyPos2 = new int[] { 0 }; @SuppressWarnings("unchecked") final Class<? extends Key>[] keyClasses = (Class<? extends Key>[]) new Class[] { PactInteger.class }; PactRecordComparatorFactory.writeComparatorSetupToConfig(super.getTaskConfig().getConfiguration(), super.getTaskConfig().getPrefixForInputParameters(0), keyPos1, keyClasses); PactRecordComparatorFactory.writeComparatorSetupToConfig(super.getTaskConfig().getConfiguration(), super.getTaskConfig().getPrefixForInputParameters(1), keyPos2, keyClasses); super.registerTask(testTask, MockMatchStub.class); try { testTask.invoke(); } catch (Exception e) { LOG.debug(e); } int expCnt = valCnt1 * valCnt2 * Math.min(keyCnt1, keyCnt2); Assert.assertTrue("Resultset size was " + outList.size() + ". Expected was " + expCnt, outList.size() == expCnt); outList.clear(); } public static class MockMatchStub extends MatchStub { @Override public void match(PactRecord value1, PactRecord value2, Collector<PactRecord> out) throws Exception { out.collect(value1); } } }