Examples with AutoInputFormat org.apache.hadoop.streaming.AutoInputFormat used on opensource projects

Example 1 with AutoInputFormat

use of org.apache.hadoop.streaming.AutoInputFormat in project hadoop by apache.

the class TestAutoInputFormat method testFormat.

@SuppressWarnings({ "unchecked", "deprecation" })
@Test
public void testFormat() throws IOException {
    JobConf job = new JobConf(conf);
    FileSystem fs = FileSystem.getLocal(conf);
    Path dir = new Path(System.getProperty("test.build.data", ".") + "/mapred");
    Path txtFile = new Path(dir, "auto.txt");
    Path seqFile = new Path(dir, "auto.seq");
    fs.delete(dir, true);
    FileInputFormat.setInputPaths(job, dir);
    Writer txtWriter = new OutputStreamWriter(fs.create(txtFile));
    try {
        for (int i = 0; i < LINES_COUNT; i++) {
            txtWriter.write("" + (10 * i));
            txtWriter.write("\n");
        }
    } finally {
        txtWriter.close();
    }
    SequenceFile.Writer seqWriter = SequenceFile.createWriter(fs, conf, seqFile, IntWritable.class, LongWritable.class);
    try {
        for (int i = 0; i < RECORDS_COUNT; i++) {
            IntWritable key = new IntWritable(11 * i);
            LongWritable value = new LongWritable(12 * i);
            seqWriter.append(key, value);
        }
    } finally {
        seqWriter.close();
    }
    AutoInputFormat format = new AutoInputFormat();
    InputSplit[] splits = format.getSplits(job, SPLITS_COUNT);
    for (InputSplit split : splits) {
        RecordReader reader = format.getRecordReader(split, job, Reporter.NULL);
        Object key = reader.createKey();
        Object value = reader.createValue();
        try {
            while (reader.next(key, value)) {
                if (key instanceof LongWritable) {
                    assertEquals("Wrong value class.", Text.class, value.getClass());
                    assertTrue("Invalid value", Integer.parseInt(((Text) value).toString()) % 10 == 0);
                } else {
                    assertEquals("Wrong key class.", IntWritable.class, key.getClass());
                    assertEquals("Wrong value class.", LongWritable.class, value.getClass());
                    assertTrue("Invalid key.", ((IntWritable) key).get() % 11 == 0);
                    assertTrue("Invalid value.", ((LongWritable) value).get() % 12 == 0);
                }
            }
        } finally {
            reader.close();
        }
    }
}