Java Code Examples for org.apache.hadoop.io.BoundedByteArrayOutputStream#getBuffer()

The following examples show how to use org.apache.hadoop.io.BoundedByteArrayOutputStream#getBuffer() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: InMemoryMapOutput.java From hadoop with Apache License 2.0

6 votes

public InMemoryMapOutput(Configuration conf, TaskAttemptID mapId,
                         MergeManagerImpl<K, V> merger,
                         int size, CompressionCodec codec,
                         boolean primaryMapOutput) {
  super(mapId, (long)size, primaryMapOutput);
  this.conf = conf;
  this.merger = merger;
  this.codec = codec;
  byteStream = new BoundedByteArrayOutputStream(size);
  memory = byteStream.getBuffer();
  if (codec != null) {
    decompressor = CodecPool.getDecompressor(codec);
  } else {
    decompressor = null;
  }
}

Example 2

Source File: InMemoryMapOutput.java From big-c with Apache License 2.0

6 votes

public InMemoryMapOutput(Configuration conf, TaskAttemptID mapId,
                         MergeManagerImpl<K, V> merger,
                         int size, CompressionCodec codec,
                         boolean primaryMapOutput) {
  super(mapId, (long)size, primaryMapOutput);
  this.conf = conf;
  this.merger = merger;
  this.codec = codec;
  byteStream = new BoundedByteArrayOutputStream(size);
  memory = byteStream.getBuffer();
  if (codec != null) {
    decompressor = CodecPool.getDecompressor(codec);
  } else {
    decompressor = null;
  }
}

Example 3

Source File: MapOutput.java From incubator-tez with Apache License 2.0

6 votes

MapOutput(InputAttemptIdentifier attemptIdentifier, MergeManager merger, int size, 
          boolean primaryMapOutput) {
  this.id = ID.incrementAndGet();
  this.attemptIdentifier = attemptIdentifier;
  this.merger = merger;

  type = Type.MEMORY;
  byteStream = new BoundedByteArrayOutputStream(size);
  memory = byteStream.getBuffer();

  this.size = size;
  
  localFS = null;
  disk = null;
  outputPath = null;
  tmpOutputPath = null;
  
  this.primaryMapOutput = primaryMapOutput;
}

Example 4

Source File: TestTezMerger.java From tez with Apache License 2.0

6 votes

private List<TezMerger.Segment> createInMemorySegments(int segmentCount, int keysPerSegment)
    throws IOException {
  List<TezMerger.Segment> segmentList = Lists.newLinkedList();
  Random rnd = new Random();
  DataInputBuffer key = new DataInputBuffer();
  DataInputBuffer value = new DataInputBuffer();
  for (int i = 0; i < segmentCount; i++) {
    BoundedByteArrayOutputStream stream = new BoundedByteArrayOutputStream(10000);
    InMemoryWriter writer = new InMemoryWriter(stream);

    for (int j = 0; j < keysPerSegment; j++) {
      populateData(new IntWritable(rnd.nextInt()), new LongWritable(rnd.nextLong()), key, value);
      writer.append(key, value);
    }
    writer.close();
    InMemoryReader reader = new InMemoryReader(merger, null, stream.getBuffer(), 0, stream.getLimit());

    segmentList.add(new TezMerger.Segment(reader, null));
  }
  return segmentList;
}

Example 5

Source File: TestValuesIterator.java From tez with Apache License 2.0

4 votes

/**
 * create inmemory segments
 *
 * @return
 * @throws IOException
 */
@SuppressWarnings("unchecked")
public List<TezMerger.Segment> createInMemStreams() throws IOException {
  int numberOfStreams = Math.max(2, rnd.nextInt(10));
  LOG.info("No of streams : " + numberOfStreams);

  SerializationFactory serializationFactory = new SerializationFactory(conf);
  Serializer keySerializer = serializationFactory.getSerializer(keyClass);
  Serializer valueSerializer = serializationFactory.getSerializer(valClass);

  LocalDirAllocator localDirAllocator =
      new LocalDirAllocator(TezRuntimeFrameworkConfigs.LOCAL_DIRS);
  InputContext context = createTezInputContext();
  MergeManager mergeManager = new MergeManager(conf, fs, localDirAllocator,
      context, null, null, null, null, null, 1024 * 1024 * 10, null, false, -1);

  DataOutputBuffer keyBuf = new DataOutputBuffer();
  DataOutputBuffer valBuf = new DataOutputBuffer();
  DataInputBuffer keyIn = new DataInputBuffer();
  DataInputBuffer valIn = new DataInputBuffer();
  keySerializer.open(keyBuf);
  valueSerializer.open(valBuf);

  List<TezMerger.Segment> segments = new LinkedList<TezMerger.Segment>();
  for (int i = 0; i < numberOfStreams; i++) {
    BoundedByteArrayOutputStream bout = new BoundedByteArrayOutputStream(1024 * 1024);
    InMemoryWriter writer =
        new InMemoryWriter(bout);
    Map<Writable, Writable> data = createData();
    //write data
    for (Map.Entry<Writable, Writable> entry : data.entrySet()) {
      keySerializer.serialize(entry.getKey());
      valueSerializer.serialize(entry.getValue());
      keyIn.reset(keyBuf.getData(), 0, keyBuf.getLength());
      valIn.reset(valBuf.getData(), 0, valBuf.getLength());
      writer.append(keyIn, valIn);
      originalData.put(entry.getKey(), entry.getValue());
      keyBuf.reset();
      valBuf.reset();
      keyIn.reset();
      valIn.reset();
    }
    IFile.Reader reader = new InMemoryReader(mergeManager, null, bout.getBuffer(), 0,
        bout.getBuffer().length);
    segments.add(new TezMerger.Segment(reader, null));

    data.clear();
    writer.close();
  }
  return segments;
}