Examples with Deflater java.util.zip.Deflater used on opensource projects

Example 16 with Deflater

use of java.util.zip.Deflater in project voltdb by VoltDB.

the class FileArchiver method archive.

/*
    public static void compressFile(String infilename, String outfilename,
                                    FileAccess storage) throws IOException {
        FileArchiver.archive(infilename, outfilename, storage, COMPRESSION_ZIP);
    }

    public static void decompressFile(String infilename, String outfilename,
                                      FileAccess storage) throws IOException {
        FileArchiver.unarchive(
                infilename, outfilename, storage, COMPRESSION_ZIP);
    }

    public static void copyFile(String infilename, String outfilename,
                                    FileAccess storage) throws IOException {
        FileArchiver.archive(
                infilename, outfilename, storage, COMPRESSION_NONE);
    }

    public static void restoreFile(String infilename, String outfilename,
                                      FileAccess storage) throws IOException {
        FileArchiver.unarchive(
                infilename, outfilename, storage, COMPRESSION_NONE);
    }
    */
public static void archive(String infilename, String outfilename, FileAccess storage, int compressionType) throws IOException {
    InputStream in = null;
    OutputStream f = null;
    DeflaterOutputStream deflater = null;
    boolean completed = false;
    // if there is no file
    if (!storage.isStreamElement(infilename)) {
        return;
    }
    try {
        byte[] b = new byte[COPY_BLOCK_SIZE];
        in = storage.openInputStreamElement(infilename);
        f = storage.openOutputStreamElement(outfilename);
        switch(compressionType) {
            case COMPRESSION_ZIP:
                f = deflater = new DeflaterOutputStream(f, new Deflater(Deflater.BEST_SPEED), b.length);
                break;
            case COMPRESSION_GZIP:
                f = deflater = new GZIPOutputStream(f, b.length);
                break;
            case COMPRESSION_NONE:
                break;
            default:
                throw new RuntimeException("FileArchiver" + compressionType);
        }
        while (true) {
            int l = in.read(b, 0, b.length);
            if (l == -1) {
                break;
            }
            f.write(b, 0, l);
        }
        completed = true;
    } catch (Throwable e) {
        throw FileUtil.toIOException(e);
    } finally {
        try {
            if (in != null) {
                in.close();
            }
            if (f != null) {
                if (deflater != null) {
                    deflater.finish();
                }
                f.close();
            }
            if (!completed && storage.isStreamElement(outfilename)) {
                storage.removeElement(outfilename);
            }
        } catch (Throwable e) {
            throw FileUtil.toIOException(e);
        }
    }
}

Example 17 with Deflater

use of java.util.zip.Deflater in project graylog2-server by Graylog2.

the class TestHelper method zlibCompress.

public static byte[] zlibCompress(String what, int level) throws IOException {
    final ByteArrayInputStream compressMe = new ByteArrayInputStream(what.getBytes(StandardCharsets.UTF_8));
    final ByteArrayOutputStream compressedMessage = new ByteArrayOutputStream();
    try (DeflaterOutputStream out = new DeflaterOutputStream(compressedMessage, new Deflater(level))) {
        ByteStreams.copy(compressMe, out);
    }
    return compressedMessage.toByteArray();
}

Example 18 with Deflater

use of java.util.zip.Deflater in project HdrHistogram by HdrHistogram.

the class DoubleHistogramTest method testDoubleHistogramSerialization.

void testDoubleHistogramSerialization(DoubleHistogram histogram) throws Exception {
    histogram.recordValue(testValueLevel);
    histogram.recordValue(testValueLevel * 10);
    histogram.recordValueWithExpectedInterval(histogram.getCurrentHighestTrackableValue() - 1, histogram.getCurrentHighestTrackableValue() / 1000);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutput out = null;
    ByteArrayInputStream bis = null;
    ObjectInput in = null;
    DoubleHistogram newHistogram = null;
    try {
        out = new ObjectOutputStream(bos);
        out.writeObject(histogram);
        Deflater compresser = new Deflater();
        compresser.setInput(bos.toByteArray());
        compresser.finish();
        byte[] compressedOutput = new byte[1024 * 1024];
        int compressedDataLength = compresser.deflate(compressedOutput);
        System.out.println("Serialized form of " + histogram.getClass() + " with internalHighestToLowestValueRatio = " + histogram.getHighestToLowestValueRatio() + "\n and a numberOfSignificantValueDigits = " + histogram.getNumberOfSignificantValueDigits() + " is " + bos.toByteArray().length + " bytes long. Compressed form is " + compressedDataLength + " bytes long.");
        System.out.println("   (estimated footprint was " + histogram.getEstimatedFootprintInBytes() + " bytes)");
        bis = new ByteArrayInputStream(bos.toByteArray());
        in = new ObjectInputStream(bis);
        newHistogram = (DoubleHistogram) in.readObject();
    } finally {
        if (out != null)
            out.close();
        bos.close();
        if (in != null)
            in.close();
        if (bis != null)
            bis.close();
    }
    assertNotNull(newHistogram);
    assertEqual(histogram, newHistogram);
}

Example 19 with Deflater

use of java.util.zip.Deflater in project MVPArms by JessYanCoding.

the class ZipHelper method compressForZlib.

/**
     * zlib compress 2 byte
     *
     * @param bytesToCompress
     * @return
     */
public static byte[] compressForZlib(byte[] bytesToCompress) {
    Deflater deflater = new Deflater();
    deflater.setInput(bytesToCompress);
    deflater.finish();
    byte[] bytesCompressed = new byte[Short.MAX_VALUE];
    int numberOfBytesAfterCompression = deflater.deflate(bytesCompressed);
    byte[] returnValues = new byte[numberOfBytesAfterCompression];
    System.arraycopy(bytesCompressed, 0, returnValues, 0, numberOfBytesAfterCompression);
    return returnValues;
}

Example 20 with Deflater

use of java.util.zip.Deflater in project undertow by undertow-io.

the class CompressionUtilsTest method setup.

@Before
public void setup() throws Exception {
    compress = new Deflater(Deflater.BEST_SPEED, true);
    decompress = new Inflater(true);
}