Example usage for io.netty.buffer ByteBuf writableBytes

List of usage examples for io.netty.buffer ByteBuf writableBytes

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Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf writableBytes.

Prototype

public abstract int writableBytes();

Source Link

Document

Returns the number of writable bytes which is equal to (this.capacity - this.writerIndex) .

Usage

From source file:DescriptorTester.java

License:Open Source License

public void sender(ByteBuf buf) {

    DatagramSocket socket = null;
    try {/*  w w  w. ja v  a2 s. co m*/
        socket = new DatagramSocket();
    } catch (SocketException e) {
        e.printStackTrace();
    }
    InetAddress address = null;
    try {
        address = InetAddress.getLoopbackAddress();
        System.out.println(address);
    } catch (Exception e) {
        e.printStackTrace();
    }

    {
        System.out.printf("Capacity of ByteBuf  %d", buf.writableBytes());
        System.out.printf("Writer Index %d", buf.writerIndex());
        int packet_size = buf.writerIndex();
        System.out.printf("packetsize %d", packet_size);
        byte[] array = buf.array();
        DatagramPacket packet = new DatagramPacket(array, packet_size, address, 5246);
        try {
            socket.send(packet);
            System.out.printf("\nSending Capwap Message  ");
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

From source file:TestDescriptor.java

License:Open Source License

public void sender(ByteBuf buf) {

    DatagramSocket socket = null;
    try {//w  w w  .j a va 2s .c  om
        socket = new DatagramSocket();
    } catch (SocketException e) {
        e.printStackTrace();
    }
    InetAddress address = null;
    try {
        address = InetAddress.getLoopbackAddress();
        System.out.println(address);
    } catch (Exception e) {
        e.printStackTrace();
    }

    {
        System.out.printf("Capacity of ByteBuf  %d", buf.writableBytes());
        System.out.printf("Writer Index %d", buf.writerIndex());
        int packet_size = buf.writerIndex();
        System.out.printf("packetsize %d", packet_size);
        byte[] array = buf.array();
        DatagramPacket packet = new DatagramPacket(array, packet_size, address, 5246);
        try {
            socket.send(packet);
            System.out.printf("\nSending Capwap Message  ");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

From source file:CapwapMsgSender.java

License:Open Source License

public static void main(String args[]) {

    DatagramSocket socket = null;
    try {//from   w w w . j  a  va  2 s.  c o  m
        socket = new DatagramSocket();
    } catch (SocketException e) {
        e.printStackTrace();
    }
    InetAddress address = null;
    try {
        address = InetAddress.getLoopbackAddress();
        System.out.println(address);
    } catch (Exception e) {
        e.printStackTrace();
    }
    //ByteBuf nett_buf = Unpooled.buffer();
    ByteBuf buf = null;

    Scanner sc = new Scanner(System.in);
    while (true) {
        System.out.println("\nEnter Capwap Message ID");
        int capwapMsg = sc.nextInt();
        System.out.printf("Capacity of ByteBuf  %d", buf.writableBytes());
        System.out.printf("Writer Index %d", buf.writerIndex());
        int packet_size = buf.writerIndex();
        byte[] array = buf.array();
        DatagramPacket packet = new DatagramPacket(array, packet_size, address, 5246);
        try {
            socket.send(packet);
            System.out.printf("\nSending Capwap Message %s ", ODLCapwapConsts.msgTypetoString(capwapMsg));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

From source file:alluxio.worker.block.io.LocalFileBlockReader.java

License:Apache License

@Override
public int transferTo(ByteBuf buf) throws IOException {
    return buf.writeBytes(mLocalFileChannel, buf.writableBytes());
}

From source file:alluxio.worker.block.RemoteBlockReader.java

License:Apache License

@Override
public int transferTo(ByteBuf buf) throws IOException {
    Preconditions.checkState(!mClosed);/*from   ww  w .  j  a va2  s  .  c o m*/
    init();
    if (mInputStream == null || mInputStream.remaining() <= 0) {
        return -1;
    }
    int bytesToRead = (int) Math.min(buf.writableBytes(), mInputStream.remaining());
    return buf.writeBytes(mInputStream, bytesToRead);
}

From source file:alluxio.worker.block.UnderFileSystemBlockReader.java

License:Apache License

/**
 * This interface is supposed to be used for sequence block reads.
 *
 * @param buf the byte buffer//from w w w . j a  v a  2s  .  c  om
 * @return the number of bytes read, -1 if it reaches EOF and none was read
 * @throws IOException if any I/O errors occur when reading the block
 */
@Override
public int transferTo(ByteBuf buf) throws IOException {
    Preconditions.checkState(!mClosed);
    if (mUnderFileSystemInputStream == null) {
        return -1;
    }
    if (mBlockMeta.getBlockSize() <= mInStreamPos) {
        return -1;
    }
    // Make a copy of the state to keep track of what we have read in this transferTo call.
    ByteBuf bufCopy = null;
    if (mBlockWriter != null) {
        bufCopy = buf.duplicate();
        bufCopy.readerIndex(bufCopy.writerIndex());
    }
    int bytesToRead = (int) Math.min((long) buf.writableBytes(), mBlockMeta.getBlockSize() - mInStreamPos);
    int bytesRead = buf.writeBytes(mUnderFileSystemInputStream, bytesToRead);

    if (bytesRead <= 0) {
        return bytesRead;
    }

    mInStreamPos += bytesRead;

    if (mBlockWriter != null) {
        bufCopy.writerIndex(buf.writerIndex());
        while (bufCopy.readableBytes() > 0) {
            mBlockWriter.transferFrom(bufCopy);
        }
    }

    return bytesRead;
}

From source file:alluxio.worker.block.UnderFileSystemBlockReaderTest.java

License:Apache License

@Test
public void transferFullBlock() throws Exception {
    mReader = UnderFileSystemBlockReader.create(mUnderFileSystemBlockMeta, 0, false, mAlluxioBlockStore);
    ByteBuf buf = PooledByteBufAllocator.DEFAULT.buffer((int) TEST_BLOCK_SIZE * 2, (int) TEST_BLOCK_SIZE * 2);
    try {//  ww w  .j a  v  a2  s  .  com
        while (buf.writableBytes() > 0 && mReader.transferTo(buf) != -1) {
        }
        Assert.assertTrue(BufferUtils.equalIncreasingByteBuffer((int) TEST_BLOCK_SIZE, (int) TEST_BLOCK_SIZE,
                buf.nioBuffer()));
        mReader.close();
    } finally {
        buf.release();
    }
}

From source file:alluxio.worker.block.UnderFileSystemBlockReaderTest.java

License:Apache License

@Test
public void transferPartialBlock() throws Exception {
    mReader = UnderFileSystemBlockReader.create(mUnderFileSystemBlockMeta, 0, false, mAlluxioBlockStore);
    ByteBuf buf = PooledByteBufAllocator.DEFAULT.buffer((int) TEST_BLOCK_SIZE / 2, (int) TEST_BLOCK_SIZE / 2);
    try {//from   w  ww .j  av a2 s .  c  om
        while (buf.writableBytes() > 0 && mReader.transferTo(buf) != -1) {
        }
        Assert.assertTrue(BufferUtils.equalIncreasingByteBuffer((int) TEST_BLOCK_SIZE,
                (int) TEST_BLOCK_SIZE / 2, buf.nioBuffer()));
        mReader.close();
    } finally {
        buf.release();
    }
}

From source file:alluxio.worker.netty.DataServerBlockReadHandler.java

License:Apache License

@Override
protected DataBuffer getDataBuffer(Channel channel, long offset, int len) throws IOException {
    BlockReader blockReader = ((BlockReadRequestInternal) mRequest).mBlockReader;
    Preconditions.checkArgument(blockReader.getChannel() instanceof FileChannel,
            "Only FileChannel is supported!");
    switch (mTransferType) {
    case MAPPED://w w w  . j a  va  2s.  co m
        ByteBuf buf = channel.alloc().buffer(len, len);
        try {
            FileChannel fileChannel = (FileChannel) blockReader.getChannel();
            Preconditions.checkState(fileChannel.position() == offset);
            while (buf.writableBytes() > 0 && buf.writeBytes(fileChannel, buf.writableBytes()) != -1) {
            }
            return new DataNettyBufferV2(buf);
        } catch (Throwable e) {
            buf.release();
            throw e;
        }
    case TRANSFER: // intend to fall through as TRANSFER is the default type.
    default:
        return new DataFileChannel((FileChannel) blockReader.getChannel(), offset, len);
    }
}

From source file:alluxio.worker.netty.DataServerUfsBlockReadHandler.java

License:Apache License

@Override
protected DataBuffer getDataBuffer(Channel channel, long offset, int len) throws IOException {
    BlockReader blockReader = ((UfsBlockReadRequestInternal) mRequest).mBlockReader;
    // This buf is released by netty.
    ByteBuf buf = channel.alloc().buffer(len, len);
    try {//w  w  w  .  j  av  a2s .  c  om
        while (buf.writableBytes() > 0 && blockReader.transferTo(buf) != -1) {
        }
        return new DataNettyBufferV2(buf);
    } catch (Throwable e) {
        buf.release();
        throw e;
    }
}