Package org.apache.hadoop.io.compress

Examples of org.apache.hadoop.io.compress.CompressionOutputStream

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    }
    LOG.info("Generated " + count + " records");
   
    // Compress data
    DataOutputBuffer compressedDataBuffer = new DataOutputBuffer();
    CompressionOutputStream deflateFilter =
      codec.createOutputStream(compressedDataBuffer);
    DataOutputStream deflateOut =
      new DataOutputStream(new BufferedOutputStream(deflateFilter));
    deflateOut.write(data.getData(), 0, data.getLength());
    deflateOut.flush();
    deflateFilter.finish();
    LOG.info("Finished compressing data");
   
    // De-compress data
    DataInputBuffer deCompressedDataBuffer = new DataInputBuffer();
    deCompressedDataBuffer.reset(compressedDataBuffer.getData(), 0,
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    ZlibFactory.setCompressionLevel(conf, CompressionLevel.NO_COMPRESSION);
    Compressor c2 = CodecPool.getCompressor(codec, conf);
    // ensure same compressor placed earlier
    assertTrue("Got mismatched ZlibCompressor", c1 == c2);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    CompressionOutputStream cos = null;
    // write trivially compressable data
    byte[] b = new byte[1 << 15];
    Arrays.fill(b, (byte) 43);
    try {
      cos = codec.createOutputStream(bos, c2);
      cos.write(b);
    } finally {
      if (cos != null) {
        cos.close();
      }
      CodecPool.returnCompressor(c2);
    }
    byte[] outbytes = bos.toByteArray();
    // verify data were not compressed
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    System.out.println(name + ":");

    // compress it
    List<Long> compressDurations = new ArrayList<Long>();
    ByteArrayOutputStream compressedStream = new ByteArrayOutputStream();
    CompressionOutputStream compressingStream =
        algorithm.createPlainCompressionStream(compressedStream, compressor);
    try {
      for (int itTime = 0; itTime < benchmarkNTimes; ++itTime) {
        final long startTime = System.nanoTime();
        compressingStream.resetState();
        compressedStream.reset();
        compressingStream.write(buffer, offset, length);
        compressingStream.flush();
        compressedStream.toByteArray();

        final long finishTime = System.nanoTime();

        // add time record
        if (itTime >= benchmarkNOmit) {
          compressDurations.add(finishTime - startTime);
        }
      }
    } catch (IOException e) {
      throw new RuntimeException(String.format(
          "Benchmark, or encoding algorithm '%s' cause some stream problems",
          name), e);
    }
    compressingStream.close();
    printBenchmarkResult(length, compressDurations, Manipulation.COMPRESSION);

    byte[] compBuffer = compressedStream.toByteArray();

    // uncompress it several times and measure performance
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      out.write(b, off, len);
    }

    @Override
    public void flush() throws IOException {
      CompressionOutputStream cout = (CompressionOutputStream) out;
      cout.finish();
      cout.flush();
      cout.resetState();
    }
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    LOG.info("Generated " + count + " records");
   
    // Compress data
    DataOutputBuffer compressedDataBuffer = new DataOutputBuffer();
    CompressionOutputStream deflateFilter =
      codec.createOutputStream(compressedDataBuffer);
    DataOutputStream deflateOut =
      new DataOutputStream(new BufferedOutputStream(deflateFilter));
    deflateOut.write(data.getData(), 0, data.getLength());
    deflateOut.flush();
    deflateFilter.finish();
    LOG.info("Finished compressing data");
   
    // De-compress data
    DataInputBuffer deCompressedDataBuffer = new DataInputBuffer();
    deCompressedDataBuffer.reset(compressedDataBuffer.getData(), 0,
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      out.write(b, off, len);
    }

    @Override
    public void flush() throws IOException {
      CompressionOutputStream cout = (CompressionOutputStream) out;
      cout.finish();
      cout.flush();
      cout.resetState();
    }
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      key.numberRows = bufferedRecords;

      Compressor compressor = null;
      NonSyncDataOutputBuffer valueBuffer = null;
      CompressionOutputStream deflateFilter = null;
      DataOutputStream deflateOut = null;
      boolean isCompressed = isCompressed();
      int valueLength = 0;
      if (isCompressed) {
        ReflectionUtils.setConf(codec, this.conf);
        compressor = CodecPool.getCompressor(codec);
        valueBuffer = new NonSyncDataOutputBuffer();
        deflateFilter = codec.createOutputStream(valueBuffer, compressor);
        deflateOut = new DataOutputStream(deflateFilter);
      }

      for (int columnIndex = 0; columnIndex < columnNumber; columnIndex++) {
        ColumnBuffer currentBuf = columnBuffers[columnIndex];
        currentBuf.flushGroup();

        NonSyncDataOutputBuffer columnValue = currentBuf.columnValBuffer;
        int colLen;
        int plainLen = columnValuePlainLength[columnIndex];

        if (isCompressed) {
          if (deflateFilter instanceof SchemaAwareCompressionOutputStream) {
            ((SchemaAwareCompressionOutputStream)deflateFilter).
              setColumnIndex(columnIndex);
          }
          deflateFilter.resetState();
          deflateOut.write(columnValue.getData(), 0, columnValue.getLength());
          deflateOut.flush();
          deflateFilter.finish();
          // find how much compressed data was added for this column
          colLen = valueBuffer.getLength() - valueLength;
        } else {
          colLen = columnValuePlainLength[columnIndex];
        }
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      if(this.isCompressed()) {
        Compressor compressor = CodecPool.getCompressor(codec);
        NonSyncDataOutputBuffer compressionBuffer =
          new NonSyncDataOutputBuffer();
        CompressionOutputStream deflateFilter =
          codec.createOutputStream(compressionBuffer, compressor);
        DataOutputStream deflateOut = new DataOutputStream(deflateFilter);
        //compress key and write key out
        compressionBuffer.reset();
        deflateFilter.resetState();
        keyBuffer.write(deflateOut);
        deflateOut.flush();
        deflateFilter.finish();
        int compressedKeyLen = compressionBuffer.getLength();
        out.writeInt(compressedKeyLen);
        out.write(compressionBuffer.getData(), 0, compressedKeyLen);
        CodecPool.returnCompressor(compressor);
      } else {
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    LOG.info("Generated " + count + " records");
   
    // Compress data
    DataOutputBuffer compressedDataBuffer = new DataOutputBuffer();
    CompressionOutputStream deflateFilter =
      codec.createOutputStream(compressedDataBuffer);
    DataOutputStream deflateOut =
      new DataOutputStream(new BufferedOutputStream(deflateFilter));
    deflateOut.write(data.getData(), 0, data.getLength());
    deflateOut.flush();
    deflateFilter.finish();
    //Necessary to close the stream for BZip2 Codec to write its final output.  Flush is not enough.
    deflateOut.close();
    LOG.info("Finished compressing data");
   
    // De-compress data
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    LOG.info("Generated " + count + " records");
   
    // Compress data
    DataOutputBuffer compressedDataBuffer = new DataOutputBuffer();
    CompressionOutputStream deflateFilter =
      codec.createOutputStream(compressedDataBuffer);
    DataOutputStream deflateOut =
      new DataOutputStream(new BufferedOutputStream(deflateFilter));
    deflateOut.write(data.getData(), 0, data.getLength());
    deflateOut.flush();
    deflateFilter.finish();
    LOG.info("Finished compressing data");
   
    // De-compress data
    DataInputBuffer deCompressedDataBuffer = new DataInputBuffer();
    deCompressedDataBuffer.reset(compressedDataBuffer.getData(), 0,
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