Example usage for java.lang Long BYTES

Introduction

In this page you can find the example usage for java.lang Long BYTES.

Prototype

int BYTES

To view the source code for java.lang Long BYTES.

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Document

The number of bytes used to represent a long value in two's complement binary form.

Usage

From source file:edu.umass.cs.gigapaxos.paxospackets.RequestPacket.java

static int sizeof(Class<?> clazz) {
    switch (clazz.getSimpleName()) {
    case "int":
        return Integer.BYTES;
    case "long":
        return Long.BYTES;
    case "boolean":
        return 1;
    case "short":
        return Short.BYTES;
    case "InetSocketAddress":
        return Integer.BYTES + Short.BYTES;
    }//  ww w. j  a  v  a2 s. co m
    assert (false) : clazz;
    return -1;
}

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From source file:de.micromata.genome.logging.spi.ifiles.IndexDirectory.java

public String findLogFileNameByLogId(long logId) {
    int indexdir = (int) (logId >>> 32);
    int offset = indexdir + 2 * Long.BYTES;
    byte[] nameBuffer = new byte[LOG_FILE_NAME_SIZE];
    indexByteBuffer.position(offset);/*from   w  ww  .  j  av a 2 s .  co m*/
    indexByteBuffer.get(nameBuffer);
    String trimmed = new String(nameBuffer).trim();
    return trimmed;
}

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From source file:de.micromata.genome.logging.spi.ifiles.IndexHeader.java

public void writLogEntryPosition(LogWriteEntry lwe, int position, OutputStream idxOut) throws IOException {
    ByteBuffer ibb = ByteBuffer.wrap(new byte[Integer.BYTES]);
    ByteBuffer lbb = ByteBuffer.wrap(new byte[Long.BYTES]);
    lbb.putLong(lwe.getTimestamp());//w ww. j av a  2  s  .c  o  m
    idxOut.write(lbb.array());
    ibb.putInt(position);
    idxOut.write(ibb.array());
    idxOut.flush();
}

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From source file:io.pravega.controller.store.stream.ZKStream.java

@Override
CompletableFuture<Void> storeCreationTimeIfAbsent(final long creationTime) {
    byte[] b = new byte[Long.BYTES];
    BitConverter.writeLong(b, 0, creationTime);

    return store.createZNodeIfNotExist(creationPath, b).thenApply(x -> cache.invalidateCache(creationPath));
}

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From source file:io.stallion.utils.GeneralUtils.java

/**
 * Turn the given long id into a random base32 string token. This can be used for generating unique, secret strings
 * for accessing data, such as a web page only viewable by a secret string. By using the long id, of the
 * underlying object we guarantee uniqueness, by adding on  random characters, we make the URL nigh
 * impossible to guess./* w w  w.j a  v  a2 s.co m*/
 *
 * @param id - a long id that will be convered to base32 and used as the first part of the string
 * @param length - the number of random base32 characters to add to the end of the string
 * @return
 */
public static String tokenForId(Long id, int length) {
    ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
    buffer.putLong(id);
    return StringUtils.stripStart(new Base32().encodeAsString(buffer.array()), "A").replace("=", "")
            .toLowerCase() + "8" + randomTokenBase32(length);
}

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From source file:com.github.joulupunikki.math.random.BitsStreamGenerator64.java

/**
 * Will hash the seed with the SHA-512 digest. Enough bits are generated to
 * fill all the state bits of the generator. The digests will be chained so
 * that each new set of 512 bits receives the digest value of the previous
 * set as initial digest data. This should provide well mixed and
 * uncorrelated initial states with all seeds. Secure hashing is however
 * slower than less involved methods of state initialization.
 *
 * @param seed_in the seed/*from   w  w w  .  j  ava  2  s  . co m*/
 * @return hashed state array of longs
 */
public long[] hashSeed(long[] seed_in) {
    // prepare to hash seed
    int seed_len = seed_in.length;
    long[] seed_out = new long[STATE_WORDS];
    MessageDigest md = null;
    try {
        md = MessageDigest.getInstance("SHA-512");
    } catch (Exception e) { //SHA-512 should be available in java 1.5+
        throw new RuntimeException(null, e);
    }
    int digest_count = (STATE_BITS - 1) / md.getDigestLength() + 1;
    int digest_bytes = md.getDigestLength() / Byte.SIZE;
    if (seed_len > digest_count) {
        seed_len = digest_count;
    }
    byte[] hashed_seed = new byte[STATE_WORDS * Long.BYTES];
    int s = 0;
    byte[] r = null;
    // hash seed
    for (; s < seed_len; s++) {
        r = md.digest(PrimitiveConversion.longToByteArray(seed_in[s]));
        System.arraycopy(r, 0, hashed_seed, s * digest_bytes, digest_bytes);
        md.update(r); // chain digests
    }
    // if out of seed just chain digests
    for (; s < digest_count; s++) {
        r = md.digest();
        System.arraycopy(r, 0, hashed_seed, s * digest_bytes, digest_bytes);
        md.update(r);

    }
    // convert digest bytes to longs
    byte[] t = new byte[Long.BYTES];
    for (int i = 0; i < STATE_WORDS; i++) {
        System.arraycopy(hashed_seed, i * Long.BYTES, t, 0, Long.BYTES);
        seed_out[i] = PrimitiveConversion.byteArrayToLong(t);
    }
    return seed_out;
}

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From source file:org.hobbit.core.rabbit.RabbitMQUtils.java

/**
 * Creates a byte array representing the given long value.
 *
 * @param value/*from w w  w. j a  va2  s .c  om*/
 *            the value that should be serialized
 * @return the byte array containing the given long value
 */
public static byte[] writeLong(long value) {
    ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
    buffer.putLong(value);
    return buffer.array();
}

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From source file:io.druid.segment.data.V3CompressedVSizeColumnarMultiIntsSerializerTest.java

private void checkV2SerializedSizeAndData(int offsetChunkFactor, int valueChunkFactor) throws Exception {
    File tmpDirectory = Files.createTempDirectory(StringUtils.format("CompressedVSizeIndexedV3WriterTest_%d_%d",
            offsetChunkFactor, offsetChunkFactor)).toFile();
    FileSmoosher smoosher = new FileSmoosher(tmpDirectory);
    int maxValue = vals.size() > 0 ? getMaxValue(vals) : 0;

    try (SegmentWriteOutMedium segmentWriteOutMedium = new OffHeapMemorySegmentWriteOutMedium()) {
        CompressedColumnarIntsSerializer offsetWriter = new CompressedColumnarIntsSerializer(
                segmentWriteOutMedium, offsetChunkFactor, byteOrder, compressionStrategy,
                GenericIndexedWriter.ofCompressedByteBuffers(segmentWriteOutMedium, "offset",
                        compressionStrategy, Long.BYTES * 250000));

        GenericIndexedWriter genericIndexed = GenericIndexedWriter.ofCompressedByteBuffers(
                segmentWriteOutMedium, "value", compressionStrategy, Long.BYTES * 250000);
        CompressedVSizeColumnarIntsSerializer valueWriter = new CompressedVSizeColumnarIntsSerializer(
                segmentWriteOutMedium, maxValue, valueChunkFactor, byteOrder, compressionStrategy,
                genericIndexed);/*from   www . j  a v  a2 s  . c  om*/
        V3CompressedVSizeColumnarMultiIntsSerializer writer = new V3CompressedVSizeColumnarMultiIntsSerializer(
                offsetWriter, valueWriter);
        writer.open();
        for (int[] val : vals) {
            writer.addValues(new ArrayBasedIndexedInts(val));
        }

        final SmooshedWriter channel = smoosher.addWithSmooshedWriter("test", writer.getSerializedSize());
        writer.writeTo(channel, smoosher);
        channel.close();
        smoosher.close();
        SmooshedFileMapper mapper = Smoosh.map(tmpDirectory);

        V3CompressedVSizeColumnarMultiIntsSupplier supplierFromByteBuffer = V3CompressedVSizeColumnarMultiIntsSupplier
                .fromByteBuffer(mapper.mapFile("test"), byteOrder);
        ColumnarMultiInts columnarMultiInts = supplierFromByteBuffer.get();
        assertEquals(columnarMultiInts.size(), vals.size());
        for (int i = 0; i < vals.size(); ++i) {
            IndexedInts subVals = columnarMultiInts.get(i);
            assertEquals(subVals.size(), vals.get(i).length);
            for (int j = 0, size = subVals.size(); j < size; ++j) {
                assertEquals(subVals.get(j), vals.get(i)[j]);
            }
        }
        CloseQuietly.close(columnarMultiInts);
        mapper.close();
    }
}

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From source file:io.warp10.quasar.encoder.QuasarTokenEncoder.java

public String getTokenIdent(String token, byte[] tokenSipHashkey) {
    long ident = SipHashInline.hash24_palindromic(tokenSipHashkey, token.getBytes());

    ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
    buffer.order(ByteOrder.BIG_ENDIAN);
    buffer.putLong(ident);//from  w w w .  j a v a2 s  .  com
    return Hex.encodeHexString(buffer.array());
}

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From source file:org.hobbit.core.rabbit.RabbitMQUtils.java

/**
 * Reads a long value from the given byte array.
 *
 * @param data//www.ja  va 2s  .c  o  m
 *            a serialized long value
 * @param offset
 *            position at which the parsing will start
 * @param length
 *            number of bytes that should be parsed (should equal
 *            {@link Long#BYTES})
 * @return the value read from the array
 */
public static long readLong(byte[] data, int offset, int length) {
    if (length < Long.BYTES) {
        LOGGER.error("Cant read a long value from {} bytes. Returning 0.", length);
        return 0;
    }
    ByteBuffer buffer = ByteBuffer.wrap(data, offset, length);
    return buffer.getLong();
}

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