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

Example 6 with Deflater

use of java.util.zip.Deflater in project okio by square.

the class DeflaterSinkTest method multipleSegmentsWithoutCompression.

@Test
public void multipleSegmentsWithoutCompression() throws IOException {
    Buffer buffer = new Buffer();
    Deflater deflater = new Deflater();
    deflater.setLevel(Deflater.NO_COMPRESSION);
    DeflaterSink deflaterSink = new DeflaterSink(buffer, deflater);
    int byteCount = Segment.SIZE * 4;
    deflaterSink.write(new Buffer().writeUtf8(repeat('a', byteCount)), byteCount);
    deflaterSink.close();
    assertEquals(repeat('a', byteCount), inflate(buffer).readUtf8(byteCount));
}

Example 7 with Deflater

use of java.util.zip.Deflater in project okio by square.

the class DeflaterSinkTest method deflateWithSyncFlush.

@Test
public void deflateWithSyncFlush() throws Exception {
    String original = "Yes, yes, yes. That's why we're taking extreme precautions.";
    Buffer data = new Buffer();
    data.writeUtf8(original);
    Buffer sink = new Buffer();
    DeflaterSink deflaterSink = new DeflaterSink(sink, new Deflater());
    deflaterSink.write(data, data.size());
    deflaterSink.flush();
    Buffer inflated = inflate(sink);
    assertEquals(original, inflated.readUtf8());
}

Example 8 with Deflater

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

the class ScreenVideoEncoder method compressUsingZlib.

/**
	 * Compress the byte array using Zlib.
	 * @param pixels
	 * @return a byte array of compressed data
	 */
private static byte[] compressUsingZlib(byte[] pixels) {
    long start = System.currentTimeMillis();
    // Create the compressed stream
    byte[] output = new byte[pixels.length];
    Deflater compresser = new Deflater(Deflater.BEST_COMPRESSION);
    compresser.setInput(pixels);
    compresser.finish();
    int compressedDataLength = compresser.deflate(output);
    byte[] zData = new byte[compressedDataLength];
    System.arraycopy(output, 0, zData, 0, compressedDataLength);
    long end = System.currentTimeMillis();
    // set the byte array to the newly compressed data
    return zData;
}

Example 9 with Deflater

use of java.util.zip.Deflater in project elasticsearch by elastic.

the class DeflateCompressor method streamOutput.

@Override
public StreamOutput streamOutput(StreamOutput out) throws IOException {
    out.writeBytes(HEADER);
    final boolean nowrap = true;
    final Deflater deflater = new Deflater(LEVEL, nowrap);
    final boolean syncFlush = true;
    OutputStream compressedOut = new DeflaterOutputStream(out, deflater, BUFFER_SIZE, syncFlush);
    compressedOut = new BufferedOutputStream(compressedOut, BUFFER_SIZE);
    return new OutputStreamStreamOutput(compressedOut) {

        final AtomicBoolean closed = new AtomicBoolean(false);

        public void close() throws IOException {
            try {
                super.close();
            } finally {
                if (closed.compareAndSet(false, true)) {
                    // important to release native memory
                    deflater.end();
                }
            }
        }
    };
}

Example 10 with Deflater

use of java.util.zip.Deflater in project jetty.project by eclipse.

the class GzipHandler method getDeflater.

/* ------------------------------------------------------------ */
@Override
public Deflater getDeflater(Request request, long content_length) {
    String ua = request.getHttpFields().get(HttpHeader.USER_AGENT);
    if (ua != null && !isAgentGzipable(ua)) {
        LOG.debug("{} excluded user agent {}", this, request);
        return null;
    }
    if (content_length >= 0 && content_length < _minGzipSize) {
        LOG.debug("{} excluded minGzipSize {}", this, request);
        return null;
    }
    // check the accept encoding header
    HttpField accept = request.getHttpFields().getField(HttpHeader.ACCEPT_ENCODING);
    if (accept == null) {
        LOG.debug("{} excluded !accept {}", this, request);
        return null;
    }
    boolean gzip = accept.contains("gzip");
    if (!gzip) {
        LOG.debug("{} excluded not gzip accept {}", this, request);
        return null;
    }
    Deflater df = _deflater.get();
    if (df == null)
        df = new Deflater(_compressionLevel, true);
    else
        _deflater.set(null);
    return df;
}