Example usage for java.nio ByteBuffer allocateDirect

Introduction

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

Prototype

public static ByteBuffer allocateDirect(int capacity)

Source Link

Document

Creates a direct byte buffer based on a newly allocated memory block.

Usage

From source file:org.apache.hadoop.util.NativeStair.java

public static boolean encodeBulk(byte[][] inputs, byte[][] outputs) {
    ByteBuffer[] inputBuffers = new ByteBuffer[inputs.length];
    ByteBuffer[] outputBuffers = new ByteBuffer[outputs.length];
    int bufferLen = inputs[0].length;

    for (int i = 0; i < inputs.length; i++) {
        inputBuffers[i] = directify(inputs[i], 0, bufferLen);
    }//from  w w  w.java 2 s. c o  m
    for (int i = 0; i < outputs.length; i++) {
        outputBuffers[i] = ByteBuffer.allocateDirect(bufferLen);
    }

    //LOG.info("inputLength:" + inputs.length +
    //    " outputLength:" + outputs.length +
    //    " bufferLength:" + bufferLen);
    if (!nativeEncodeBulk(inputBuffers, inputs.length, outputBuffers, outputs.length, bufferLen)) {
        LOG.info("nativeEncodeBulk returns false");
        return false;
    }
    //LOG.info("nativeEncodeBulk returns true");

    for (int i = 0; i < outputs.length; i++) {
        outputBuffers[i].get(outputs[i]);
    }

    return true;
}

From source file:com.l2jfree.loginserver.L2LoginIdentifier.java

private synchronized void load() {
    if (isLoaded())
        return;/*  w  w  w.j a  va  2  s.c o m*/

    File f = new File(System.getProperty("user.home", null), FILENAME);
    ByteBuffer bb = ByteBuffer.allocateDirect(8);

    if (!f.exists() || f.length() != 8) {
        _uid = getRandomUID();
        _loaded = true;
        _log.info("A new UID has been generated for this login server.");

        FileOutputStream fos = null;
        try {
            f.createNewFile();
            fos = new FileOutputStream(f);
            FileChannel fc = fos.getChannel();
            bb.putLong(getUID());
            bb.flip();
            fc.write(bb);
            fos.flush();
        } catch (IOException e) {
            _log.warn("Could not store login server's UID!", e);
        } finally {
            IOUtils.closeQuietly(fos);
            f.setReadOnly();
        }
    } else {
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(f);
            FileChannel fc = fis.getChannel();
            fc.read(bb);
        } catch (IOException e) {
            _log.warn("Could not read stored login server's UID!", e);
        } finally {
            IOUtils.closeQuietly(fis);
        }

        if (bb.position() > 0) {
            bb.flip();
            _uid = bb.getLong();
        } else
            _uid = getRandomUID();
        _loaded = true;
    }
}

From source file:org.apache.tajo.tuple.BaseTupleBuilder.java

public BaseTupleBuilder(Schema schema) {
    super(SchemaUtil.toDataTypes(schema));
    buffer = ByteBuffer.allocateDirect(64 * StorageUnit.KB).order(ByteOrder.nativeOrder());
    address = UnsafeUtil.getAddress(buffer);
}

From source file:org.apache.hadoop.raid.JRSOEncoder.java

public JRSOEncoder(Configuration conf, int stripeSize, int paritySize) {
    super(conf, stripeSize, paritySize);
    bufSize = 64 * 1024;/*  www .  ja  va  2 s  .  c  o m*/
    dataBufs = ByteBuffer.allocateDirect(bufSize * stripeSize);
    parityBufs = ByteBuffer.allocateDirect(bufSize * paritySize);
    reserve = ByteBuffer.allocateDirect(1024);
}

From source file:org.apache.tajo.tuple.offheap.OffHeapMemory.java

public OffHeapMemory(ResizableLimitSpec limitSpec) {
    this(ByteBuffer.allocateDirect((int) limitSpec.initialSize()).order(ByteOrder.nativeOrder()), limitSpec);
}

From source file:org.apache.hadoop.raid.IAOEncoder.java

public IAOEncoder(Configuration conf, int stripeSize, int paritySize) {
    super(conf, stripeSize, paritySize);
    LOG.info("bufsize: " + bufSize);
    dataBufs = ByteBuffer.allocateDirect(bufSize * stripeSize);
    parityBufs = ByteBuffer.allocateDirect(bufSize * paritySize);
    reserve = ByteBuffer.allocateDirect(1024);
}

From source file:org.apache.hadoop.raid.PMOEncoder.java

public PMOEncoder(Configuration conf, int stripeSize, int paritySize) {
    super(conf, stripeSize, paritySize);
    LOG.info("bufsize: " + bufSize);
    dataBufs = ByteBuffer.allocateDirect(bufSize * stripeSize);
    parityBufs = ByteBuffer.allocateDirect(bufSize * paritySize);
    reserve = ByteBuffer.allocateDirect(1024);
}

From source file:edu.tsinghua.lumaqq.qq.net.AbstractPort.java

/**
* 
*///ww w . j a va2  s  .  c om
public AbstractPort(IConnectionPolicy policy) {
    this.policy = policy;
    sendQueue = new LinkedList<OutPacket>();
    sendBuf = ByteBuffer.allocateDirect(QQ.QQ_MAX_PACKET_SIZE);
    receiveBuf = ByteBuffer.allocateDirect(QQ.QQ_MAX_PACKET_SIZE);
}

From source file:org.apache.hadoop.mapred.nativetask.buffer.DirectBufferPool.java

public synchronized ByteBuffer borrowBuffer(int capacity) throws IOException {
    Queue<WeakReference<ByteBuffer>> list = bufferMap.get(capacity);
    if (null == list) {
        return ByteBuffer.allocateDirect(capacity);
    }/* w ww .  j  a va 2  s.c  o  m*/
    WeakReference<ByteBuffer> ref;
    while ((ref = list.poll()) != null) {
        ByteBuffer buf = ref.get();
        if (buf != null) {
            return buf;
        }
    }
    return ByteBuffer.allocateDirect(capacity);
}

From source file:com.msr.dnsdemo.network.DownloadFile.java

public static void fastChannelCopy(final ReadableByteChannel src, final WritableByteChannel dest)
        throws IOException, NullPointerException {
    if (src != null && dest != null) {
        final ByteBuffer buffer = ByteBuffer.allocateDirect(16 * 1024);
        while (src.read(buffer) != -1) {
            // prepare the buffer to be drained
            buffer.flip();//from   w  w  w .jav  a2  s.c  om
            // write to the channel, may block
            dest.write(buffer);
            // If partial transfer, shift remainder down
            // If buffer is empty, same as doing clear()
            buffer.compact();
        }
        // EOF will leave buffer in fill state
        buffer.flip();
        // make sure the buffer is fully drained.
        while (buffer.hasRemaining()) {
            dest.write(buffer);
        }
    }
}