Example usage for java.nio ByteBuffer slice

Introduction

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

Prototype

public abstract ByteBuffer slice();

Source Link

Document

Returns a sliced buffer that shares its content with this buffer.

Usage

From source file:org.apache.hadoop.hive.llap.cache.LlapAllocatorBuffer.java

public void initialize(ByteBuffer byteBuffer, int offset, int length) {
    this.byteBuffer = byteBuffer.slice();
    this.byteBuffer.position(offset);
    this.byteBuffer.limit(offset + length);
    this.allocSize = length;
}

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From source file:org.commoncrawl.util.shared.S3InputStream.java

@Override
public boolean contentAvailable(NIOHttpConnection theConnection, int itemId, String itemKey,
        NIOBufferList contentBuffer) {/*from   www  .j a va 2 s.c o m*/

    ByteBuffer buffer = null;
    IOException exception = null;
    //int receivedBytes = 0;
    try {
        while ((buffer = contentBuffer.read()) != null) {
            if (buffer.position() != 0) {
                buffer = buffer.slice();
            }
            //receivedBytes += buffer.remaining();
            buffer.position(buffer.limit());
            _bufferQueue.write(buffer);
        }
        _bufferQueue.flush();
    } catch (IOException e) {
        LOG.error(CCStringUtils.stringifyException(e));
        exception = e;
    }
    if (_bufferQueue.available() >= MAX_BUFFER_SIZE) {
        theConnection.disableReads();
        pausedConnection.set(theConnection);
    }
    //long nanoTimeStart = System.nanoTime();
    _writeLock.lock();
    //long nanoTimeEnd = System.nanoTime();
    //System.out.println("Received: " + receivedBytes + "for URI:" + uri + " Lock took:" + (nanoTimeEnd-nanoTimeStart));
    try {
        Condition writeCondition = _writeEvent.getAndSet(null);
        if (exception != null) {
            _eofCondition.set(true);
            _exception.set(exception);
        }
        if (writeCondition != null) {
            writeCondition.signal();
        }
    } finally {
        _writeLock.unlock();
    }
    return true;
}

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From source file:com.glaf.core.util.ByteBufferUtils.java

/**
 * from to //w ww  .  ja v  a 2 s  . c  o m
 * 
 * @param fromBuffer
 *            Buffer ? flush
 * @param toBuffer
 *            Buffer ? fill
 * @return number of bytes moved
 */
public static int put(ByteBuffer fromBuffer, ByteBuffer toBuffer) {
    int put;
    int remaining = fromBuffer.remaining();
    if (remaining > 0) { // 
        if (remaining <= toBuffer.remaining()) {
            toBuffer.put(fromBuffer);
            put = remaining;
            // from 
            fromBuffer.position(fromBuffer.limit());
        }
        // heap buffer
        else if (fromBuffer.hasArray()) {
            put = toBuffer.remaining();
            // ??
            toBuffer.put(fromBuffer.array(), fromBuffer.arrayOffset() + fromBuffer.position(), put);
            fromBuffer.position(fromBuffer.position() + put);
        }
        // direct buffer
        else {
            // ??
            put = toBuffer.remaining();
            ByteBuffer slice = fromBuffer.slice();
            slice.limit(put);
            toBuffer.put(slice);
            fromBuffer.position(fromBuffer.position() + put);
        }
    } else {
        put = 0;
    }
    return put;
}

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From source file:org.commoncrawl.util.S3InputStream.java

@Override
public boolean contentAvailable(NIOHttpConnection theConnection, int itemId, String itemKey,
        NIOBufferList contentBuffer) {// w  w w.j av  a 2  s  .  c om

    ByteBuffer buffer = null;
    IOException exception = null;
    //int receivedBytes = 0;
    try {
        while ((buffer = contentBuffer.read()) != null) {
            if (buffer.position() != 0) {
                buffer = buffer.slice();
            }
            //receivedBytes += buffer.remaining();
            buffer.position(buffer.limit());
            _bufferQueue.write(buffer);
        }
        _bufferQueue.flush();
    } catch (IOException e) {
        LOG.error(CCStringUtils.stringifyException(e));
        exception = e;
    }
    if (_bufferQueue.available() >= MAX_BUFFER_SIZE) {
        LOG.info("*** PAUSING DOWNLOADS FOR:" + theConnection.getURL());
        theConnection.disableReads();
        pausedConnection.set(theConnection);
    }
    //long nanoTimeStart = System.nanoTime();
    _writeLock.lock();
    //long nanoTimeEnd = System.nanoTime();
    //System.out.println("Received: " + receivedBytes + "for URI:" + uri + " Lock took:" + (nanoTimeEnd-nanoTimeStart));
    try {
        Condition writeCondition = _writeEvent.getAndSet(null);
        if (exception != null) {
            _eofCondition.set(true);
            _exception.set(exception);
        }
        if (writeCondition != null) {
            writeCondition.signal();
        }
    } finally {
        _writeLock.unlock();
    }
    return true;
}

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From source file:org.wso2.andes.kernel.AndesMessageMetadata.java

/**
 * Create a copy of metadata/*w w  w .  ja v a  2  s.  c  om*/
 *
 * @param originalMetadata          source metadata that needs to be copied
 * @param isCompressed Value to indicate if the message is compressed or not
 * @return copy of the metadata as a byte array
 */
private byte[] createNewMetadata(byte[] originalMetadata, boolean isCompressed) {
    ByteBuffer buf = ByteBuffer.wrap(originalMetadata);
    buf.position(1);
    buf = buf.slice();
    MessageMetaDataType type = MessageMetaDataType.values()[originalMetadata[0]];
    metaDataType = type;
    StorableMessageMetaData originalMessageMetadata = type.getFactory().createMetaData(buf);

    byte[] underlying;
    //TODO need to implement factory pattern here
    if ((MessageMetaDataType.META_DATA_MQTT).equals(type)) {
        underlying = MQTTMetaDataHandler.constructMetadata(buf, originalMessageMetadata, isCompressed);
    } else {
        underlying = AMQPMetaDataHandler.constructMetadata(buf, originalMessageMetadata, isCompressed);
    }

    return underlying;
}

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From source file:org.wso2.andes.kernel.AndesMessageMetadata.java

/**
 * Create a copy of updated metadata, for durable topic subscriptions
 *
 * @param originalMetadata source metadata that needs to be copied
 * @param routingKey       routing key of the message
 * @param exchangeName     exchange of the message
 * @return copy of the metadata as a byte array
 *///w  w w. j a  v  a  2 s.  c  om
private byte[] createNewMetadata(byte[] originalMetadata, String routingKey, String exchangeName,
        long arrivalTime) {
    ByteBuffer buf = ByteBuffer.wrap(originalMetadata);
    buf.position(1);
    buf = buf.slice();
    MessageMetaDataType type = MessageMetaDataType.values()[originalMetadata[0]];
    metaDataType = type;
    StorableMessageMetaData originalMessageMetadata = type.getFactory().createMetaData(buf);

    byte[] underlying;
    //TODO need to implement factory pattern here
    if ((MessageMetaDataType.META_DATA_MQTT).equals(type)) {
        underlying = MQTTMetaDataHandler.constructMetadata(routingKey, buf, originalMessageMetadata,
                exchangeName);
    } else {
        underlying = AMQPMetaDataHandler.constructMetadata(routingKey, buf, originalMessageMetadata,
                exchangeName, arrivalTime);
    }

    return underlying;
}

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From source file:org.wso2.andes.kernel.AndesMessageMetadata.java

private void parseMetaData() {
    ByteBuffer buf = ByteBuffer.wrap(metadata);
    buf.position(1);/*ww w.ja va  2  s.c o m*/
    buf = buf.slice();
    MessageMetaDataType type = MessageMetaDataType.values()[metadata[0]];
    metaDataType = type;
    StorableMessageMetaData mdt = type.getFactory().createMetaData(buf);
    //todo need to discuss on making the flow more generic
    if (type.equals(MessageMetaDataType.META_DATA_0_10) || type.equals(MessageMetaDataType.META_DATA_0_8)) {
        this.isPersistent = ((MessageMetaData) mdt).isPersistent();
        this.expirationTime = ((MessageMetaData) mdt).getMessageHeader().getExpiration();
        this.arrivalTime = ((MessageMetaData) mdt).getArrivalTime();
        this.destination = ((MessageMetaData) mdt).getMessagePublishInfo().getRoutingKey().toString();
        this.messageContentLength = ((MessageMetaData) mdt).getContentSize();
        this.isTopic = ((MessageMetaData) mdt).getMessagePublishInfo().getExchange()
                .equals(AMQPUtils.TOPIC_EXCHANGE_NAME);
        this.messageRouterName = ((MessageMetaData) mdt).getMessagePublishInfo().getExchange().toString();
        this.isCompressed = ((MessageMetaData) mdt).isCompressed();
    }
    //For MQTT Specific Types
    if (type.equals(MessageMetaDataType.META_DATA_MQTT)) {
        this.arrivalTime = ((MQTTMessageMetaData) mdt).getMessageArrivalTime();
        this.isTopic = ((MQTTMessageMetaData) mdt).isTopic();
        this.messageRouterName = MQTTUtils.MQTT_EXCHANGE_NAME;
        this.destination = ((MQTTMessageMetaData) mdt).getDestination();
        this.isPersistent = ((MQTTMessageMetaData) mdt).isPersistent();
        this.messageContentLength = ((MQTTMessageMetaData) mdt).getContentSize();
        this.qosLevel = ((MQTTMessageMetaData) mdt).getQosLevel();
        this.isCompressed = ((MQTTMessageMetaData) mdt).isCompressed();
    }

}

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From source file:com.googlecode.mp4parser.boxes.microsoft.XtraBox.java

@Override
public void _parseDetails(ByteBuffer content) {
    int boxSize = content.remaining();
    data = content.slice(); //Keep this in case we fail to parse
    successfulParse = false;//from  ww w.  jav  a2s. c  o m
    try {
        tags.clear();
        while (content.remaining() > 0) {
            XtraTag tag = new XtraTag();
            tag.parse(content);
            tags.addElement(tag);
        }
        int calcSize = detailSize();
        if (boxSize != calcSize) {
            throw new RuntimeException("Improperly handled Xtra tag: Calculated sizes don't match ( " + boxSize
                    + "/" + calcSize + ")");
        }
        successfulParse = true;
    } catch (Exception e) {
        successfulParse = false;
        System.err.println("Malformed Xtra Tag detected: " + e.toString());
        e.printStackTrace();
        content.position(content.position() + content.remaining());
    } finally {
        content.order(ByteOrder.BIG_ENDIAN); //Just in case we bailed out mid-parse we don't want to leave the byte order in MS land
    }
}

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From source file:io.Text.java

/**
 * Returns the Unicode Scalar Value (32-bit integer value)
 * for the character at <code>position</code>. Note that this
 * method avoids using the converter or doing String instatiation
 * @return the Unicode scalar value at position or -1
 *          if the position is invalid or points to a
 *          trailing byte/* w ww  .  ja  v a  2  s.co m*/
 */
public int charAt(int position) {
    if (position > this.length)
        return -1; // too long
    if (position < 0)
        return -1; // duh.

    ByteBuffer bb = (ByteBuffer) ByteBuffer.wrap(bytes).position(position);
    return bytesToCodePoint(bb.slice());
}

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