Example usage for java.nio ByteBuffer allocate

List of usage examples for java.nio ByteBuffer allocate

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Introduction

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

Prototype

public static ByteBuffer allocate(int capacity)

Source Link

Document

Creates a byte buffer based on a newly allocated byte array.

Usage

From source file:com.linkedin.databus.client.pub.TestUnifiedClientStats.java

private DbusEvent createEvent(long timestampNs) {
    DbusEventInfo eventInfo = new DbusEventInfo(DbusOpcode.UPSERT, 6004L, // SCN
            (short) 1, // physical partition ID
            (short) 1, // logical partition ID
            timestampNs, (short) 1, // srcId
            SOURCE1_SCHEMAID, // payloadSchemaMd5
            SOURCE1_PAYLOAD, // payload
            false, // enableTracing
            true); // autocommit
    DbusEventKey key = new DbusEventKey("myKey".getBytes(Charset.forName("UTF-8")));
    ByteBuffer buf = ByteBuffer.allocate(1000).order(ByteOrder.BIG_ENDIAN);
    try {//  ww w .  j av a 2s .c  om
        DbusEventFactory.serializeEvent(key, buf, eventInfo);
    } catch (KeyTypeNotImplementedException ex) {
        fail("string key type not supported by DbusEventV2Factory?!? " + ex.getLocalizedMessage());
    }
    return _eventFactory.createReadOnlyDbusEventFromBuffer(buf, 0);
}

From source file:com.ebay.pulsar.analytics.metricstore.druid.query.model.GroupByQuery.java

@Override
public byte[] cacheKey() {
    BaseFilter filter = this.getFilter();
    byte[] filterBytes = filter == null ? new byte[] {} : filter.cacheKey();
    byte[] aggregatorBytes = QueryCacheHelper.computeAggregatorBytes(this.getAggregations());
    byte[] granularityBytes = null;
    if (this.getGranularity() instanceof BaseGranularity) {
        granularityBytes = ((BaseGranularity) this.getGranularity()).cacheKey();
    } else {//from   ww w.  ja  va 2 s.co m
        granularityBytes = new byte[0];
    }
    byte[] intervalsBytes = QueryCacheHelper.computeIntervalsBytes(this.getIntervals());
    final byte[][] dimensionsBytes = new byte[this.getDimensions().size()][];
    int dimensionsBytesSize = 0;
    int index = 0;
    for (String dimension : this.getDimensions()) {
        dimensionsBytes[index] = dimension.getBytes();
        dimensionsBytesSize += dimensionsBytes[index].length;
        ++index;
    }
    final byte[] limitBytes = this.getLimitSpec().cacheKey();

    BaseHaving having = this.getHaving();
    byte[] havingBytes = having == null ? new byte[] {} : having.cacheKey();

    List<BasePostAggregator> postaggregators = this.getPostAggregations();
    byte[] postaggregatorBytes = postaggregators == null ? new byte[] {}
            : QueryCacheHelper.computePostAggregatorBytes(postaggregators);

    ByteBuffer buffer = ByteBuffer
            .allocate(1 + granularityBytes.length + filterBytes.length + aggregatorBytes.length
                    + dimensionsBytesSize + limitBytes.length + havingBytes.length + intervalsBytes.length
                    + postaggregatorBytes.length)
            .put(GROUPBY_QUERY).put(granularityBytes).put(filterBytes).put(aggregatorBytes)
            .put(postaggregatorBytes);

    for (byte[] dimensionsByte : dimensionsBytes) {
        buffer.put(dimensionsByte);
    }
    return buffer.put(limitBytes).put(havingBytes).put(intervalsBytes).array();
}

From source file:com.stainlesscode.mediapipeline.audioout.DefaultAudioPlayer.java

private void allocateBuffers() {
    if (bytesPerFrame > 0) {
        if (LogUtil.isDebugEnabled()) {
            LogUtil.debug("bytesPerFrame is " + bytesPerFrame);
            LogUtil.debug("Allocating audio buffers " + bufferSizeInFrames + "*" + bytesPerFrame);
        }/*from   w  w  w . j a va2s .  c  o m*/
        bufferSizeInBytes = bufferSizeInFrames * bytesPerFrame;
        smoothingBuffer = ByteBuffer.allocate(bufferSizeInBytes);
        playBuffer = ByteBuffer.allocateDirect(bufferSizeInBytes);
    }
}

From source file:com.smartitengineering.util.simple.io.BufferedInputStream.java

protected int initializeNewBuffer() {
    int remaining;
    final int capacity;
    if (bufferSegmentSize > 100) {
        capacity = bufferSegmentSize;//  ww  w.  j a  va2  s  . c  om
    } else {
        capacity = bufferSegmentSize / 10;
    }
    currentBuffer = ByteBuffer.allocate(capacity);
    currentBuffer.limit(bufferSegmentSize);
    remaining = currentBuffer.remaining();
    buffers.put(currentBuffer, new MutableInt(0));
    return remaining;
}

From source file:de.csdev.ebus.command.EBusCommandUtils.java

/**
 * Builds an escaped master telegram part or if slaveData is used a complete telegram incl. master ACK and SYN
 *
 * @param source/*from  ww w.  j a  va  2 s .c  om*/
 * @param target
 * @param command
 * @param masterData
 * @return
 * @throws EBusTypeException
 */
public static ByteBuffer buildPartMasterTelegram(byte source, byte target, byte[] command, byte[] masterData)
        throws EBusTypeException {

    ByteBuffer buf = ByteBuffer.allocate(50);

    buf.put(source); // QQ - Source
    buf.put(target); // ZZ - Target
    buf.put(command); // PB SB - Command
    buf.put((byte) masterData.length); // NN - Length, will be set later

    // add the escaped bytes
    for (byte b : masterData) {
        buf.put(escapeSymbol(b));
    }

    // calculate crc
    byte crc8 = EBusUtils.crc8(buf.array(), buf.position());

    buf.put(escapeSymbol(crc8));

    // set limit and reset position
    buf.limit(buf.position());
    buf.position(0);

    return buf;
}

From source file:de.hofuniversity.iisys.neo4j.websock.query.encoding.unsafe.DeflateJsonQueryHandler.java

private ByteBuffer fuse(final int length) {
    //fuses the buffers into a single array of the target length
    final ByteBuffer bb = ByteBuffer.allocate(length);

    for (byte[] buffer : fBuffers) {
        if (buffer.length > length - bb.position()) {
            bb.put(buffer, 0, length - bb.position());
        } else {//from   w  ww.  j a v a  2s .c o m
            bb.put(buffer);
        }
    }

    //important
    bb.flip();
    fBuffers.clear();

    return bb;
}

From source file:gobblin.writer.SimpleDataWriter.java

/**
 * Write a source record to the staging file
 *
 * @param record data record to write//from w w  w. j a  v a2 s .  c o m
 * @throws java.io.IOException if there is anything wrong writing the record
 */
@Override
public void write(byte[] record) throws IOException {
    Preconditions.checkNotNull(record);

    byte[] toWrite = record;
    if (this.recordDelimiter.isPresent()) {
        toWrite = Arrays.copyOf(record, record.length + 1);
        toWrite[toWrite.length - 1] = this.recordDelimiter.get();
    }
    if (this.prependSize) {
        long recordSize = toWrite.length;
        ByteBuffer buf = ByteBuffer.allocate(Longs.BYTES);
        buf.putLong(recordSize);
        toWrite = ArrayUtils.addAll(buf.array(), toWrite);
    }
    this.stagingFileOutputStream.write(toWrite);
    this.bytesWritten += toWrite.length;
    this.recordsWritten++;
}

From source file:com.reactive.hzdfs.utils.Digestor.java

/**
 * // ww w . j  a v a2  s  . c  o  m
 * @param l
 * @return
 */
public Digestor addLong(long l) {
    if (md != null)
        md.update(ByteBuffer.allocate(8).putLong(l));
    else
        updateBytes(ByteBuffer.allocate(8).putLong(l));
    return this;
}

From source file:net.sf.jml.message.p2p.MsnP2PMessage.java

/**
 * @see MsnMimeMessage#toOutgoingMsg(MsnProtocol)
 */// ww  w .  j av a2s . co m
@Override
public OutgoingMSG[] toOutgoingMsg(MsnProtocol protocol) {
    OutgoingMSG message = new OutgoingMSG(protocol);
    message.setMsgType(OutgoingMSG.TYPE_MSNC1);

    byte[] mimeMessageHeader = Charset.encodeAsByteArray(toString());

    byte[] body = bodyToMessage();
    if (body == null) {
        body = new byte[0];
    }

    ByteBuffer msg = ByteBuffer
            .allocate(mimeMessageHeader.length + BINARY_HEADER_LEN + body.length + BINARY_FOOTER_LEN);

    msg.put(mimeMessageHeader);
    msg.put(binaryHeader);
    msg.put(body);
    msg.put(binaryFooter);
    message.setMsg(msg.array());
    return new OutgoingMSG[] { message };
}

From source file:com.atilika.kuromoji.trie.DoubleArrayTrie.java

/**
 * Load Stored data/*from w  w w  . j  a  v  a  2s  . co  m*/
 *
 * @param input  input stream to read the double array trie from
 * @return double array trie, not null
 * @throws IOException if an IO error occured during reading the double array trie
 */
public static DoubleArrayTrie read(InputStream input) throws IOException {
    DoubleArrayTrie trie = new DoubleArrayTrie();
    DataInputStream dis = new DataInputStream(new BufferedInputStream(input));

    trie.compact = dis.readBoolean();
    int baseCheckSize = dis.readInt(); // Read size of baseArr and checkArr
    int tailSize = dis.readInt(); // Read size of tailArr
    ReadableByteChannel channel = Channels.newChannel(dis);

    ByteBuffer tmpBaseBuffer = ByteBuffer.allocate(baseCheckSize * 4);
    channel.read(tmpBaseBuffer);
    tmpBaseBuffer.rewind();
    trie.baseBuffer = tmpBaseBuffer.asIntBuffer();

    ByteBuffer tmpCheckBuffer = ByteBuffer.allocate(baseCheckSize * 4);
    channel.read(tmpCheckBuffer);
    tmpCheckBuffer.rewind();
    trie.checkBuffer = tmpCheckBuffer.asIntBuffer();

    ByteBuffer tmpTailBuffer = ByteBuffer.allocate(tailSize * 2);
    channel.read(tmpTailBuffer);
    tmpTailBuffer.rewind();
    trie.tailBuffer = tmpTailBuffer.asCharBuffer();

    input.close();
    return trie;
}