org.apache.hadoop.mapred.TestSequenceFileAsBinaryInputFormat.java Source code

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Here is the source code for org.apache.hadoop.mapred.TestSequenceFileAsBinaryInputFormat.java

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/**
 * 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.hadoop.mapred;

import java.io.IOException;
import java.util.Random;

import org.apache.hadoop.fs.*;
import org.apache.hadoop.io.*;

import junit.framework.TestCase;
import org.apache.commons.logging.*;

public class TestSequenceFileAsBinaryInputFormat extends TestCase {
    private static final Log LOG = FileInputFormat.LOG;
    private static final int RECORDS = 10000;

    public void testBinary() throws IOException {
        JobConf job = new JobConf();
        FileSystem fs = FileSystem.getLocal(job);
        Path dir = new Path(System.getProperty("test.build.data", ".") + "/mapred");
        Path file = new Path(dir, "testbinary.seq");
        Random r = new Random();
        long seed = r.nextLong();
        r.setSeed(seed);

        fs.delete(dir, true);
        FileInputFormat.setInputPaths(job, dir);

        Text tkey = new Text();
        Text tval = new Text();

        SequenceFile.Writer writer = new SequenceFile.Writer(fs, job, file, Text.class, Text.class);
        try {
            for (int i = 0; i < RECORDS; ++i) {
                tkey.set(Integer.toString(r.nextInt(), 36));
                tval.set(Long.toString(r.nextLong(), 36));
                writer.append(tkey, tval);
            }
        } finally {
            writer.close();
        }

        InputFormat<BytesWritable, BytesWritable> bformat = new SequenceFileAsBinaryInputFormat();

        int count = 0;
        r.setSeed(seed);
        BytesWritable bkey = new BytesWritable();
        BytesWritable bval = new BytesWritable();
        Text cmpkey = new Text();
        Text cmpval = new Text();
        DataInputBuffer buf = new DataInputBuffer();
        final int NUM_SPLITS = 3;
        FileInputFormat.setInputPaths(job, file);
        for (InputSplit split : bformat.getSplits(job, NUM_SPLITS)) {
            RecordReader<BytesWritable, BytesWritable> reader = bformat.getRecordReader(split, job, Reporter.NULL);
            try {
                while (reader.next(bkey, bval)) {
                    tkey.set(Integer.toString(r.nextInt(), 36));
                    tval.set(Long.toString(r.nextLong(), 36));
                    buf.reset(bkey.getBytes(), bkey.getLength());
                    cmpkey.readFields(buf);
                    buf.reset(bval.getBytes(), bval.getLength());
                    cmpval.readFields(buf);
                    assertTrue("Keys don't match: " + "*" + cmpkey.toString() + ":" + tkey.toString() + "*",
                            cmpkey.toString().equals(tkey.toString()));
                    assertTrue("Vals don't match: " + "*" + cmpval.toString() + ":" + tval.toString() + "*",
                            cmpval.toString().equals(tval.toString()));
                    ++count;
                }
            } finally {
                reader.close();
            }
        }
        assertEquals("Some records not found", RECORDS, count);
    }

}