Example usage for io.netty.buffer ByteBuf readInt

Introduction

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

Prototype

public abstract int readInt();

Source Link

Document

Gets a 32-bit integer at the current readerIndex and increases the readerIndex by 4 in this buffer.

Usage

From source file:com.datastax.driver.core.LZ4Compressor.java

License:Apache License

private ByteBuf decompressDirect(ByteBuf input) throws IOException {
    // If the input is direct we will allocate a direct output buffer as well as this will allow us to use
    // LZ4Compressor.decompress and so eliminate memory copies.
    int readable = input.readableBytes();
    int uncompressedLength = input.readInt();
    ByteBuffer in = inputNioBuffer(input);
    // Increase reader index.
    input.readerIndex(input.writerIndex());
    ByteBuf output = input.alloc().directBuffer(uncompressedLength);
    try {/*  ww w.j  av  a2  s  .  com*/
        ByteBuffer out = outputNioBuffer(output);
        int read = decompressor.decompress(in, in.position(), out, out.position(), out.remaining());
        if (read != readable - INTEGER_BYTES)
            throw new IOException("Compressed lengths mismatch");

        // Set the writer index so the amount of written bytes is reflected
        output.writerIndex(output.writerIndex() + uncompressedLength);
    } catch (Exception e) {
        // release output buffer so we not leak and rethrow exception.
        output.release();
        throw new IOException(e);
    }
    return output;
}

From source file:com.datastax.driver.core.LZ4Compressor.java

License:Apache License

private ByteBuf decompressHeap(ByteBuf input) throws IOException {
    // Not a direct buffer so use byte arrays...
    byte[] in = input.array();
    int len = input.readableBytes();
    int uncompressedLength = input.readInt();
    int inOffset = input.arrayOffset() + input.readerIndex();
    // Increase reader index.
    input.readerIndex(input.writerIndex());

    // Allocate a heap buffer from the ByteBufAllocator as we may use a PooledByteBufAllocator and so
    // can eliminate the overhead of allocate a new byte[].
    ByteBuf output = input.alloc().heapBuffer(uncompressedLength);
    try {/*  www  .  j a v  a  2s .  co  m*/
        int offset = output.arrayOffset() + output.writerIndex();
        byte out[] = output.array();
        int read = decompressor.decompress(in, inOffset, out, offset, uncompressedLength);
        if (read != len - INTEGER_BYTES)
            throw new IOException("Compressed lengths mismatch");

        // Set the writer index so the amount of written bytes is reflected
        output.writerIndex(output.writerIndex() + uncompressedLength);
    } catch (Exception e) {
        // release output buffer so we not leak and rethrow exception.
        output.release();
        throw new IOException(e);
    }
    return output;
}

From source file:com.Da_Technomancer.crossroads.API.packets.Message.java

License:Creative Commons License

private static int readInt(ByteBuf buf) {
    return buf.readInt();
}

From source file:com.Da_Technomancer.crossroads.API.packets.Message.java

License:Creative Commons License

private static byte[][] readByte2DArray(ByteBuf buf) {
    int outerSize = buf.readInt();
    int innerSize = buf.readInt();
    byte[][] out = new byte[outerSize][innerSize];
    for (int i = 0; i < outerSize; i++) {
        for (int j = 0; j < innerSize; j++) {
            out[i][j] = buf.readByte();/*from   ww w.  ja v a 2  s  .c o  m*/
        }
    }
    return out;
}

From source file:com.Da_Technomancer.crossroads.API.packets.Message.java

License:Creative Commons License

private static int[] readIntArray(ByteBuf buf) {
    int size = buf.readInt();
    int[] out = new int[size];
    for (int i = 0; i < size; i++) {
        out[i] = buf.readInt();/*from  w  w  w  .  j a  va2 s.  co m*/
    }
    return out;
}

From source file:com.Da_Technomancer.crossroads.API.packets.Message.java

License:Creative Commons License

private static double[] readDoubleArray(ByteBuf buf) {
    int size = buf.readInt();
    double[] out = new double[size];
    for (int i = 0; i < size; i++) {
        out[i] = buf.readDouble();//  w w  w .j av a  2  s.  c  o m
    }
    return out;
}

From source file:com.dianping.cat.message.spi.codec.NativeMessageCodec.java

License:Open Source License

@Override
public MessageTree decode(ByteBuf buf) {
    buf.readInt(); // read the length of the message tree

    DefaultMessageTree tree = new DefaultMessageTree();
    Context ctx = new Context(tree);
    Codec.HEADER.decode(ctx, buf);
    Message msg = decodeMessage(ctx, buf);

    tree.setMessage(msg);/*  ww  w .ja  va 2s .  co  m*/
    tree.setBuffer(buf);

    return tree;
}

From source file:com.digitalpetri.opcua.stack.core.channel.headers.AsymmetricSecurityHeader.java

License:Apache License

public static AsymmetricSecurityHeader decode(ByteBuf buffer) {
    /* SecurityPolicyUri */
    int securityPolicyUriLength = buffer.readInt();
    String securityPolicyUri = new String(buffer.readBytes(securityPolicyUriLength).array(),
            Charset.forName("UTF-8"));

    /* SenderCertificate */
    int senderCertificateLength = buffer.readInt();
    byte[] senderCertificate = senderCertificateLength >= 0 ? buffer.readBytes(senderCertificateLength).array()
            : null;//from  w ww.  ja va2 s . c o  m

    /* ReceiverCertificateThumbprint */
    int thumbprintLength = buffer.readInt();
    byte[] receiverCertificateThumbprint = thumbprintLength >= 0 ? buffer.readBytes(thumbprintLength).array()
            : null;

    return new AsymmetricSecurityHeader(securityPolicyUri, new ByteString(senderCertificate),
            new ByteString(receiverCertificateThumbprint));
}

From source file:com.dingwang.netty.decoder.TimeDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {

    System.out.println("==========decode");

    if (in.readableBytes() < 4) {
        return;//from  w  ww .  j av  a  2 s.co  m
    }

    out.add(new UnixTime(in.readInt()));
}

From source file:com.dingwang.rpc.decode.RpcDecoder.java

License:Open Source License

@Override
public final void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (in.readableBytes() < 4) {
        return;// w  w  w.jav  a2 s.  c o m
    }
    in.markReaderIndex();
    int dataLength = in.readInt();
    if (dataLength < 0) {
        ctx.close();
    }
    if (in.readableBytes() < dataLength) {
        in.resetReaderIndex();
    }
    byte[] data = new byte[dataLength];
    in.readBytes(data);

    Object obj = SerializationUtil.deserialize(data, genericClass);
    out.add(obj);
}