Example usage for io.netty.buffer ByteBuf readableBytes

Introduction

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

Prototype

public abstract int readableBytes();

Source Link

Document

Returns the number of readable bytes which is equal to (this.writerIndex - this.readerIndex) .

Usage

From source file:com.github.pgasync.impl.netty.ByteBufMessageDecoder.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (in.readableBytes() == 0) {
        return;//  w  ww  .  ja va2 s  . com
    }

    byte id = in.readByte();
    int length = in.readInt();

    Decoder<?> decoder = DECODERS.get(id);
    try {
        if (decoder != null) {
            ByteBuffer buffer = in.nioBuffer();
            out.add(decoder.read(buffer));
            in.skipBytes(buffer.position());
        } else {
            in.skipBytes(length - 4);
        }
    } catch (Throwable t) {
        // broad catch as otherwise the exception is silently dropped
        ctx.fireExceptionCaught(t);
    }
}

From source file:com.github.pgasync.impl.netty.NettyPgProtocolStream.java

License:Apache License

ChannelHandler newSslInitiator() {
    return new ByteToMessageDecoder() {
        @Override/*from w  w w  .  j av  a  2  s  .co m*/
        protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
            if (in.readableBytes() < 1) {
                return;
            }
            if ('S' != in.readByte()) {
                ctx.fireExceptionCaught(
                        new IllegalStateException("SSL required but not supported by backend server"));
                return;
            }
            ctx.pipeline().remove(this);
            ctx.pipeline().addFirst(SslContextBuilder.forClient()
                    .trustManager(InsecureTrustManagerFactory.INSTANCE).build().newHandler(ctx.alloc()));
        }
    };
}

From source file:com.github.spapageo.jannel.channel.ChannelBufferUtils.java

License:Open Source License

/**
 * Reads a new octet string from the byte buffer using the UTF-8 encoding
 * @param byteBuffer the bytes to read the string from
 * @param charset    the charset to use in order to decode the string
 * @return the created string//from  w w w. j  av a  2  s. co m
 */
@Nonnull
public static String readOctetStringToString(ByteBuf byteBuffer, Charset charset) {

    if (byteBuffer.readableBytes() < 4)
        throw new NotEnoughDataDecoderException("Not enough bytes to read the octet string size");

    int stringSize = byteBuffer.readInt();

    checkOctetStringSize(byteBuffer, stringSize);

    if (stringSize == -1)
        return EMPTY_STRING;

    return byteBuffer.readSlice(stringSize).toString(charset);
}

From source file:com.github.spapageo.jannel.channel.ChannelBufferUtils.java

License:Open Source License

/**
 * Read a 4 byte integer from the byte buffer
 * @param byteBuffer the bytes to read from
 * @return the integer/*from w  w w  . jav  a 2  s  .com*/
 */
public static int readInt(ByteBuf byteBuffer) {
    if (byteBuffer.readableBytes() < 4)
        throw new NotEnoughDataDecoderException("Not enough bytes to read the integer");

    return byteBuffer.readInt();
}

From source file:com.github.spapageo.jannel.channel.ChannelBufferUtils.java

License:Open Source License

/**
 * Reads a data segment from the byte buffer
 * @param byteBuffer the bytes to read from
 * @return the data segment/*from  w ww  .java 2s . c  om*/
 */
@Nonnull
public static ByteBuf readOctetStringToBytes(ByteBuf byteBuffer) {
    if (byteBuffer.readableBytes() < 4)
        throw new NotEnoughDataDecoderException("Not enough bytes to read the octet string size");

    int dataSize = byteBuffer.readInt();

    if (dataSize == -1)
        return Unpooled.EMPTY_BUFFER;

    checkOctetStringSize(byteBuffer, dataSize);

    return byteBuffer.readBytes(dataSize);
}

From source file:com.github.spapageo.jannel.channel.ChannelBufferUtils.java

License:Open Source License

/**
 * Writes a byte array to output buffer/*from   w  w  w.  j  av a 2  s. co m*/
 * @param input the input byte array
 * @param output the output buffer
 */
public static void writeBytesToOctetString(@Nullable ByteBuf input, ByteBuf output) {
    if (input == null) {
        output.writeInt(-1);
        return;
    }

    output.writeInt(input.readableBytes());
    output.writeBytes(input);
}

From source file:com.github.spapageo.jannel.channel.ChannelBufferUtils.java

License:Open Source License

private static void checkOctetStringSize(ByteBuf byteBuffer, int stringSize) {
    if (stringSize < -1 || stringSize > byteBuffer.readableBytes())
        throw new StringSizeException("The octet string size read was " + stringSize
                + " and the readable bytes were " + byteBuffer.readableBytes());
}

From source file:com.github.spapageo.jannel.channel.ChannelBufferUtilsTest.java

License:Open Source License

@Test
public void testReadOctetStringToBytesWhenOctetStringSizeIsMinus1ReturnsEmptyString() throws Exception {
    byte[] input = { (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff };
    ByteBuf inputBuffer = Unpooled.copiedBuffer(input);

    ByteBuf readBytes = ChannelBufferUtils.readOctetStringToBytes(inputBuffer);

    assertEquals("Decoded byte array size is not 0", 0, readBytes.readableBytes());

    inputBuffer.release();// www. j a va2s. c  o  m
}

From source file:com.github.spapageo.jannel.channel.ChannelBufferUtilsTest.java

License:Open Source License

@Test
public void testReadOctetStringToBytesWhenOctetStringSizeIsZeroReturnsEmptyArray() throws Exception {
    byte[] input = { 0x00, 0x00, 0x00, 0x00 };
    ByteBuf inputBuffer = Unpooled.copiedBuffer(input);

    ByteBuf readBytes = ChannelBufferUtils.readOctetStringToBytes(inputBuffer);

    assertEquals("Read byte array size is not 0", 0, readBytes.readableBytes());
    inputBuffer.release();/*from ww w .  j a va2 s  .  com*/
}

From source file:com.github.sparkfy.network.client.StreamInterceptor.java

License:Apache License

@Override
public boolean handle(ByteBuf buf) throws Exception {
    int toRead = (int) Math.min(buf.readableBytes(), byteCount - bytesRead);
    ByteBuffer nioBuffer = buf.readSlice(toRead).nioBuffer();

    int available = nioBuffer.remaining();
    callback.onData(streamId, nioBuffer);
    bytesRead += available;//from  w ww .  ja va 2  s  . c o m
    if (bytesRead > byteCount) {
        RuntimeException re = new IllegalStateException(
                String.format("Read too many bytes? Expected %d, but read %d.", byteCount, bytesRead));
        callback.onFailure(streamId, re);
        handler.deactivateStream();
        throw re;
    } else if (bytesRead == byteCount) {
        handler.deactivateStream();
        callback.onComplete(streamId);
    }

    return bytesRead != byteCount;
}