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

Example 36 with DeflaterOutputStream

use of java.util.zip.DeflaterOutputStream in project dubbo by alibaba.

the class Bytes method zip.

/**
 * zip.
 *
 * @param bytes source.
 * @return compressed byte array.
 * @throws IOException
 */
public static byte[] zip(byte[] bytes) throws IOException {
    UnsafeByteArrayOutputStream bos = new UnsafeByteArrayOutputStream();
    OutputStream os = new DeflaterOutputStream(bos);
    try {
        os.write(bytes);
    } finally {
        os.close();
        bos.close();
    }
    return bos.toByteArray();
}

Example 37 with DeflaterOutputStream

use of java.util.zip.DeflaterOutputStream in project jjwt by jwtk.

the class DeflateCompressionCodec method doCompress.

@Override
public byte[] doCompress(byte[] payload) throws IOException {
    Deflater deflater = new Deflater(Deflater.BEST_COMPRESSION);
    ByteArrayOutputStream outputStream = null;
    DeflaterOutputStream deflaterOutputStream = null;
    try {
        outputStream = new ByteArrayOutputStream();
        deflaterOutputStream = new DeflaterOutputStream(outputStream, deflater, true);
        deflaterOutputStream.write(payload, 0, payload.length);
        deflaterOutputStream.flush();
        return outputStream.toByteArray();
    } finally {
        Objects.nullSafeClose(outputStream, deflaterOutputStream);
    }
}

Example 38 with DeflaterOutputStream

use of java.util.zip.DeflaterOutputStream in project cas by apereo.

the class SamlAuthenticationRequestTests method deflateViaStream.

private static String deflateViaStream(final String samlRequest) throws IOException {
    final byte[] xmlBytes = samlRequest.getBytes(StandardCharsets.UTF_8);
    final ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();
    final DeflaterOutputStream deflaterOutputStream = new DeflaterOutputStream(byteOutputStream);
    deflaterOutputStream.write(xmlBytes, 0, xmlBytes.length);
    deflaterOutputStream.close();
    return EncodingUtils.encodeBase64(byteOutputStream.toByteArray());
}

Example 39 with DeflaterOutputStream

use of java.util.zip.DeflaterOutputStream in project bigbluebutton by bigbluebutton.

the class ScreenVideoEncoder method encodePixelsSVC2.

public static byte[] encodePixelsSVC2(int[] pixels, int width, int height) {
    changePixelScanFromBottomLeftToTopRight(pixels, width, height);
    if (paletteIndex == null)
        createPaletteIndex();
    try {
        // TODO calibrate initial size
        ByteArrayOutputStream baos1 = new ByteArrayOutputStream();
        for (int i = 0; i < pixels.length; i++) {
            writeAs15_7(pixels[i], baos1);
        }
        // baos2 contains everything from IMAGEBLOCKV2 except the DataSize field
        // TODO calibrate initial size
        ByteArrayOutputStream baos2 = new ByteArrayOutputStream();
        // IMAGEFORMAT:
        // ColorDepth: UB[2] 10 (15/7 hybrid color image); HasDiffBlocks: UB[1] 0; Zlib prime stuff (2 bits) not used (0)
        baos2.write(16);
        // No ImageBlockHeader (IMAGEDIFFPOSITION, IMAGEPRIMEPOSITION)
        Deflater deflater = new Deflater(Deflater.BEST_COMPRESSION);
        DeflaterOutputStream deflateroutputstream = new DeflaterOutputStream(baos2, deflater);
        deflateroutputstream.write(baos1.toByteArray());
        deflateroutputstream.finish();
        byte[] dataBuffer = baos2.toByteArray();
        // DataSize field
        int dataSize = dataBuffer.length;
        // TODO calibrate initial size
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        writeShort(((OutputStream) (baos)), dataSize);
        // Data
        baos.write(dataBuffer, 0, dataSize);
        return baos.toByteArray();
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

Example 40 with DeflaterOutputStream

use of java.util.zip.DeflaterOutputStream in project bazel by bazelbuild.

the class Profiler method start.

/**
   * Enable profiling.
   *
   * <p>Subsequent calls to beginTask/endTask will be recorded
   * in the provided output stream. Please note that stream performance is
   * extremely important and buffered streams should be utilized.
   *
   * @param profiledTaskKinds which kinds of {@link ProfilerTask}s to track
   * @param stream output stream to store profile data. Note: passing unbuffered stream object
   *     reference may result in significant performance penalties
   * @param comment a comment to insert in the profile data
   * @param recordAllDurations iff true, record all tasks regardless of their duration; otherwise
   *     some tasks may get aggregated if they finished quick enough
   * @param clock a {@code BlazeClock.instance()}
   * @param execStartTimeNanos execution start time in nanos obtained from {@code clock.nanoTime()}
   */
public synchronized void start(ProfiledTaskKinds profiledTaskKinds, OutputStream stream, String comment, boolean recordAllDurations, Clock clock, long execStartTimeNanos) throws IOException {
    Preconditions.checkState(!isActive(), "Profiler already active");
    taskStack = new TaskStack();
    taskQueue = new ConcurrentLinkedQueue<>();
    describer = new ObjectDescriber();
    this.profiledTaskKinds = profiledTaskKinds;
    this.clock = clock;
    // sanity check for current limitation on the number of supported types due
    // to using enum.ordinal() to store them instead of EnumSet for performance reasons.
    Preconditions.checkState(TASK_COUNT < 256, "The profiler implementation supports only up to 255 different ProfilerTask values.");
    // reset state for the new profiling session
    taskId.set(0);
    this.recordAllDurations = recordAllDurations;
    this.saveException = null;
    if (stream != null) {
        this.timer = new Timer("ProfilerTimer", true);
        // Wrapping deflater stream in the buffered stream proved to reduce CPU consumption caused by
        // the save() method. Values for buffer sizes were chosen by running small amount of tests
        // and identifying point of diminishing returns - but I have not really tried to optimize
        // them.
        this.out = new DataOutputStream(new BufferedOutputStream(new DeflaterOutputStream(stream, new Deflater(Deflater.BEST_SPEED, false), 65536), 262144));
        // magic
        this.out.writeInt(MAGIC);
        // protocol_version
        this.out.writeInt(VERSION);
        this.out.writeUTF(comment);
        // ProfileTask.values() method sorts enums using their ordinal() value, so
        // there there is no need to store ordinal() value for each entry.
        this.out.writeInt(TASK_COUNT);
        for (ProfilerTask type : ProfilerTask.values()) {
            this.out.writeUTF(type.toString());
        }
        // Start save thread
        timer.schedule(new TimerTask() {

            @Override
            public void run() {
                save();
            }
        }, SAVE_DELAY, SAVE_DELAY);
    } else {
        this.out = null;
    }
    // activate profiler
    profileStartTime = execStartTimeNanos;
}