Example usage for java.nio ByteBuffer getLong

Introduction

In this page you can find the example usage for java.nio ByteBuffer getLong.

Prototype

public abstract long getLong();

Source Link

Document

Returns the long at the current position and increases the position by 8.

Usage

From source file:com.example.IdGenerator.java

public long generateLong() {
    final LocalDateTime now = LocalDateTime.now(clock);
    final Duration duration = Duration.between(BASE, now);
    final int high = (int) duration.getSeconds();
    final int low = duration.getNano();
    final byte[] hbs = ByteBuffer.allocate(4).putInt(high).array();
    final byte[] lbs = ByteBuffer.allocate(4).putInt(low).array();
    final byte[] bytes = new byte[8];
    System.arraycopy(hbs, 0, bytes, 0, 4);
    System.arraycopy(lbs, 0, bytes, 4, 4);
    final ByteBuffer buffer = ByteBuffer.allocate(8).put(bytes, 0, 8);
    buffer.flip();/*from w  w  w .j  a  v a 2s  . c o m*/
    return buffer.getLong();
}

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From source file:it.unimi.di.big.mg4j.index.DiskBasedIndex.java

/** Commodity method for loading from a channel a big list of binary longs with specified endianness into a {@linkplain LongBigArrays long big array}.
 * /*  ww w  .j  a  va 2  s  .co  m*/
 * @param channel the channel.
 * @param byteOrder the endianness of the longs.
 * @return a big list of longs containing the longs returned by <code>channel</code>.
 */
public static LongBigArrayBigList loadLongBigList(final ReadableByteChannel channel, final long length,
        final ByteOrder byteOrder) throws IOException {
    final ByteBuffer byteBuffer = ByteBuffer.allocateDirect(BUFFER_SIZE).order(byteOrder);

    LongBigArrayBigList list = new LongBigArrayBigList(length);

    while (channel.read(byteBuffer) > 0) {
        byteBuffer.flip();
        while (byteBuffer.hasRemaining())
            list.add(byteBuffer.getLong());
        byteBuffer.clear();
    }

    return list;
}

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From source file:org.apache.jackrabbit.oak.plugins.segment.file.TarReader.java

private static Map<UUID, List<UUID>> parseGraph(ByteBuffer graphByteBuffer) {
    int count = graphByteBuffer.getInt(graphByteBuffer.limit() - 12);

    ByteBuffer buffer = graphByteBuffer.duplicate();
    buffer.limit(graphByteBuffer.limit() - 16);

    List<UUID> uuids = newArrayListWithCapacity(count);
    for (int i = 0; i < count; i++) {
        uuids.add(new UUID(buffer.getLong(), buffer.getLong()));
    }/*from   w w  w  .ja  v a2s.  co m*/

    Map<UUID, List<UUID>> graph = newHashMap();
    while (buffer.hasRemaining()) {
        UUID uuid = uuids.get(buffer.getInt());
        List<UUID> list = newArrayList();
        int refid = buffer.getInt();
        while (refid != -1) {
            list.add(uuids.get(refid));
            refid = buffer.getInt();
        }
        graph.put(uuid, list);
    }
    return graph;
}

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From source file:org.apache.airavata.gfac.core.GFacUtils.java

public static long bytesToLong(byte[] bytes) {
    ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
    buffer.put(bytes);/*from w w  w .j  a va2 s.  co m*/
    buffer.flip();//need flip
    return buffer.getLong();
}

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From source file:org.mrgeo.data.accumulo.partitioners.AccumuloMrGeoRangePartitioner.java

private synchronized TileIdWritable[] getCutPoints() throws IOException {
    if (cutPointArray == null) {
        String cutFileName = conf.get(CUTFILE_KEY);
        Path[] cf = DistributedCache.getLocalCacheFiles(conf);

        if (cf != null) {
            for (Path path : cf) {
                if (path.toUri().getPath().endsWith(cutFileName.substring(cutFileName.lastIndexOf('/')))) {
                    TreeSet<Text> cutPoints = new TreeSet<Text>();
                    Scanner in = new Scanner(new BufferedReader(new FileReader(path.toString())));
                    try {
                        while (in.hasNextLine())
                            cutPoints.add(new Text(Base64.decodeBase64(in.nextLine().getBytes())));
                    } finally {
                        in.close();/*from  ww  w. j av a 2  s.  c o m*/
                    }
                    cutPointArray = cutPoints.toArray(new Text[cutPoints.size()]);
                    break;
                }
            }
        }
        if (cutPointArray == null)
            throw new FileNotFoundException(cutFileName + " not found in distributed cache");
    }
    tileIdPointArray = new TileIdWritable[cutPointArray.length];
    for (int x = 0; x < cutPointArray.length; x++) {
        byte[] b = cutPointArray[x].getBytes();
        ByteBuffer buffer = ByteBuffer.wrap(b);
        long k = buffer.getLong();
        tileIdPointArray[x] = new TileIdWritable(k);
    }

    return tileIdPointArray;
}

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From source file:org.apache.jackrabbit.oak.segment.file.TarReader.java

private static Map<UUID, List<UUID>> parseGraph(ByteBuffer graphByteBuffer, boolean bulkOnly) {
    int count = graphByteBuffer.getInt(graphByteBuffer.limit() - 12);

    ByteBuffer buffer = graphByteBuffer.duplicate();
    buffer.limit(graphByteBuffer.limit() - 16);

    List<UUID> uuids = newArrayListWithCapacity(count);
    for (int i = 0; i < count; i++) {
        uuids.add(new UUID(buffer.getLong(), buffer.getLong()));
    }//from ww  w .  j a  va 2s .  c  om

    Map<UUID, List<UUID>> graph = newHashMap();
    while (buffer.hasRemaining()) {
        UUID uuid = uuids.get(buffer.getInt());
        List<UUID> list = newArrayList();
        int refid = buffer.getInt();
        while (refid != -1) {
            UUID ref = uuids.get(refid);
            if (!bulkOnly || !isDataSegmentId(ref.getLeastSignificantBits())) {
                list.add(ref);
            }
            refid = buffer.getInt();
        }
        graph.put(uuid, list);
    }
    return graph;
}

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From source file:com.olacabs.fabric.compute.sources.kafka.impl.TransactionManager.java

private long readLastTransactionId() throws Exception {
    byte[] data = curator.getData().forPath(txnIdPath());
    ByteBuffer read = ByteBuffer.allocate(Long.BYTES).put(data, 0, data.length);
    read.flip();/*from   w ww.ja  v  a 2  s. co m*/
    return read.getLong();
}

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From source file:org.apache.hadoop.hdfs.hoss.db.HotStore.java

/**
 * object size(unit:MB)/*from w  w  w .  ja  v a 2  s . co  m*/
 * @param objId
 * @return
 */
public long getObjectSizeMB(long objId) {
    final ByteBuffer buf = fbs.get((int) objId);
    if (buf == null) {
        LOG.error("Error trying read object " + objId);
    }
    buf.getLong();
    buf.getLong();
    long size = buf.getLong();
    return size;
}

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From source file:org.cosmo.common.record.DefnRecord.java

public Object readImpl(ByteBuffer dataIO, boolean directConvertFromBytes) throws IOException {
    // read record
    long recordId = dataIO.getLong();
    Record record = Meta.Instance((Class<? extends Record>) field().getType()).store().newInstance(recordId);
    if (record instanceof IntrinsicRecord) {
        ((IntrinsicRecord) record).setDefn(this);
    }/*from   w  ww . jav a  2  s.  co  m*/
    return record;
}

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From source file:mastermind.RandomGenerator.java

public long getLongSeed() {
    if (isValid) {
        byte[] seed = secureRandom.generateSeed(NUM_SEED_BYTES);
        ByteBuffer byteBuffer = ByteBuffer.wrap(seed);
        return byteBuffer.getLong();
    } else {//from   w ww  . ja  v a  2 s  . c  o  m
        return -1;
    }
}

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