cascading.tuple.hadoop.HadoopSerializationTest.java Source code

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Here is the source code for cascading.tuple.hadoop.HadoopSerializationTest.java

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/*
 * Copyright (c) 2007-2010 Concurrent, Inc. All Rights Reserved.
 *
 * Project and contact information: http://www.cascading.org/
 *
 * This file is part of the Cascading project.
 *
 * Cascading is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Cascading is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Cascading.  If not, see <http://www.gnu.org/licenses/>.
 */

package cascading.tuple.hadoop;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import cascading.CascadingTestCase;
import cascading.tuple.Tuple;
import cascading.tuple.TupleInputStream;
import cascading.tuple.TupleOutputStream;
import org.apache.hadoop.io.BooleanWritable;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.serializer.WritableSerialization;
import org.apache.hadoop.mapred.JobConf;

/**
 *
 */
public class HadoopSerializationTest extends CascadingTestCase {
    String outputPath = "build/test/output/tuples/serialization";

    public HadoopSerializationTest() {
        super("serialization tuple test");
    }

    public void testInputOutputSerialization() throws IOException {
        long time = System.currentTimeMillis();

        JobConf jobConf = new JobConf();

        jobConf.set("io.serializations",
                TestSerialization.class.getName() + "," + WritableSerialization.class.getName()); // disable/replace WritableSerialization class
        jobConf.set("cascading.serialization.tokens",
                "1000=" + BooleanWritable.class.getName() + ",10001=" + Text.class.getName()); // not using Text, just testing parsing

        TupleSerialization tupleSerialization = new TupleSerialization(jobConf);

        File file = new File(outputPath);

        file.mkdirs();
        file = new File(file, "/test.bytes");

        TupleOutputStream output = new TupleOutputStream(new FileOutputStream(file, false),
                tupleSerialization.getElementWriter());

        for (int i = 0; i < 501; i++) // 501 is arbitrary
        {
            String aString = "string number " + i;
            double random = Math.random();

            output.writeTuple(new Tuple(i, aString, random, new TestText(aString),
                    new Tuple("inner tuple", new BytesWritable("some string".getBytes())),
                    new BytesWritable(Integer.toString(i).getBytes("UTF-8")), new BooleanWritable(false)));
        }

        output.close();

        assertEquals("wrong size", 89967L, file.length()); // just makes sure the file size doesnt change from expected

        TupleInputStream input = new TupleInputStream(new FileInputStream(file),
                tupleSerialization.getElementReader());

        int k = -1;
        for (int i = 0; i < 501; i++) {
            Tuple tuple = input.readTuple();
            int value = tuple.getInteger(0);
            assertTrue("wrong diff", value - k == 1);
            assertTrue("wrong type", tuple.get(3) instanceof TestText);
            assertTrue("wrong type", tuple.get(4) instanceof Tuple);
            assertTrue("wrong type", tuple.get(5) instanceof BytesWritable);

            byte[] bytes = ((BytesWritable) tuple.get(5)).getBytes();
            String string = new String(bytes, 0, bytes.length > 1 ? bytes.length - 1 : bytes.length, "UTF-8");
            assertEquals("wrong value", Integer.parseInt(string), i);
            assertTrue("wrong type", tuple.get(6) instanceof BooleanWritable);
            k = value;
        }

        input.close();

        System.out.println("time = " + (System.currentTimeMillis() - time));
    }

}