Examples with TaskAttemptContext org.apache.hadoop.mapreduce.TaskAttemptContext used on opensource projects

Example 91 with TaskAttemptContext

use of org.apache.hadoop.mapreduce.TaskAttemptContext in project hadoop by apache.

the class TestFixedLengthInputFormat method testNoRecordLength.

/**
   * Test with no record length set.
   */
@Test(timeout = 5000)
public void testNoRecordLength() throws Exception {
    localFs.delete(workDir, true);
    Path file = new Path(workDir, new String("testFormat.txt"));
    createFile(file, null, 10, 10);
    // Create the job and do not set fixed record length
    Job job = Job.getInstance(defaultConf);
    FileInputFormat.setInputPaths(job, workDir);
    FixedLengthInputFormat format = new FixedLengthInputFormat();
    List<InputSplit> splits = format.getSplits(job);
    boolean exceptionThrown = false;
    for (InputSplit split : splits) {
        try {
            TaskAttemptContext context = MapReduceTestUtil.createDummyMapTaskAttemptContext(job.getConfiguration());
            RecordReader<LongWritable, BytesWritable> reader = format.createRecordReader(split, context);
            MapContext<LongWritable, BytesWritable, LongWritable, BytesWritable> mcontext = new MapContextImpl<LongWritable, BytesWritable, LongWritable, BytesWritable>(job.getConfiguration(), context.getTaskAttemptID(), reader, null, null, MapReduceTestUtil.createDummyReporter(), split);
            reader.initialize(split, mcontext);
        } catch (IOException ioe) {
            exceptionThrown = true;
            LOG.info("Exception message:" + ioe.getMessage());
        }
    }
    assertTrue("Exception for not setting record length:", exceptionThrown);
}

Example 92 with TaskAttemptContext

use of org.apache.hadoop.mapreduce.TaskAttemptContext in project hadoop by apache.

the class TestFixedLengthInputFormat method testNegativeRecordLength.

/**
   * Test with record length set to a negative value
   */
@Test(timeout = 5000)
public void testNegativeRecordLength() throws Exception {
    localFs.delete(workDir, true);
    Path file = new Path(workDir, new String("testFormat.txt"));
    createFile(file, null, 10, 10);
    // Set the fixed length record length config property 
    Job job = Job.getInstance(defaultConf);
    FixedLengthInputFormat format = new FixedLengthInputFormat();
    format.setRecordLength(job.getConfiguration(), -10);
    FileInputFormat.setInputPaths(job, workDir);
    List<InputSplit> splits = format.getSplits(job);
    boolean exceptionThrown = false;
    for (InputSplit split : splits) {
        try {
            TaskAttemptContext context = MapReduceTestUtil.createDummyMapTaskAttemptContext(job.getConfiguration());
            RecordReader<LongWritable, BytesWritable> reader = format.createRecordReader(split, context);
            MapContext<LongWritable, BytesWritable, LongWritable, BytesWritable> mcontext = new MapContextImpl<LongWritable, BytesWritable, LongWritable, BytesWritable>(job.getConfiguration(), context.getTaskAttemptID(), reader, null, null, MapReduceTestUtil.createDummyReporter(), split);
            reader.initialize(split, mcontext);
        } catch (IOException ioe) {
            exceptionThrown = true;
            LOG.info("Exception message:" + ioe.getMessage());
        }
    }
    assertTrue("Exception for negative record length:", exceptionThrown);
}

Example 93 with TaskAttemptContext

use of org.apache.hadoop.mapreduce.TaskAttemptContext in project hadoop by apache.

the class TestFixedLengthInputFormat method readSplit.

private static List<String> readSplit(FixedLengthInputFormat format, InputSplit split, Job job) throws Exception {
    List<String> result = new ArrayList<String>();
    TaskAttemptContext context = MapReduceTestUtil.createDummyMapTaskAttemptContext(job.getConfiguration());
    RecordReader<LongWritable, BytesWritable> reader = format.createRecordReader(split, context);
    MapContext<LongWritable, BytesWritable, LongWritable, BytesWritable> mcontext = new MapContextImpl<LongWritable, BytesWritable, LongWritable, BytesWritable>(job.getConfiguration(), context.getTaskAttemptID(), reader, null, null, MapReduceTestUtil.createDummyReporter(), split);
    LongWritable key;
    BytesWritable value;
    try {
        reader.initialize(split, mcontext);
        while (reader.nextKeyValue()) {
            key = reader.getCurrentKey();
            value = reader.getCurrentValue();
            result.add(new String(value.getBytes(), 0, value.getLength()));
        }
    } finally {
        reader.close();
    }
    return result;
}

Example 94 with TaskAttemptContext

use of org.apache.hadoop.mapreduce.TaskAttemptContext in project hadoop by apache.

the class TestMRSequenceFileInputFilter method countRecords.

private int countRecords(int numSplits) throws IOException, InterruptedException {
    InputFormat<Text, BytesWritable> format = new SequenceFileInputFilter<Text, BytesWritable>();
    if (numSplits == 0) {
        numSplits = random.nextInt(MAX_LENGTH / (SequenceFile.SYNC_INTERVAL / 20)) + 1;
    }
    FileInputFormat.setMaxInputSplitSize(job, fs.getFileStatus(inFile).getLen() / numSplits);
    TaskAttemptContext context = MapReduceTestUtil.createDummyMapTaskAttemptContext(job.getConfiguration());
    // check each split
    int count = 0;
    for (InputSplit split : format.getSplits(job)) {
        RecordReader<Text, BytesWritable> reader = format.createRecordReader(split, context);
        MapContext<Text, BytesWritable, Text, BytesWritable> mcontext = new MapContextImpl<Text, BytesWritable, Text, BytesWritable>(job.getConfiguration(), context.getTaskAttemptID(), reader, null, null, MapReduceTestUtil.createDummyReporter(), split);
        reader.initialize(split, mcontext);
        try {
            while (reader.nextKeyValue()) {
                LOG.info("Accept record " + reader.getCurrentKey().toString());
                count++;
            }
        } finally {
            reader.close();
        }
    }
    return count;
}

Example 95 with TaskAttemptContext

use of org.apache.hadoop.mapreduce.TaskAttemptContext in project hadoop by apache.

the class TestMRKeyValueTextInputFormat method readSplit.

private static List<Text> readSplit(KeyValueTextInputFormat format, InputSplit split, Job job) throws IOException, InterruptedException {
    List<Text> result = new ArrayList<Text>();
    Configuration conf = job.getConfiguration();
    TaskAttemptContext context = MapReduceTestUtil.createDummyMapTaskAttemptContext(conf);
    RecordReader<Text, Text> reader = format.createRecordReader(split, MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
    MapContext<Text, Text, Text, Text> mcontext = new MapContextImpl<Text, Text, Text, Text>(conf, context.getTaskAttemptID(), reader, null, null, MapReduceTestUtil.createDummyReporter(), split);
    reader.initialize(split, mcontext);
    while (reader.nextKeyValue()) {
        result.add(new Text(reader.getCurrentValue()));
    }
    reader.close();
    return result;
}