Examples of io.netty.buffer.ByteBuf.readableBytes()

io.netty.buffer.ByteBuf.readableBytes()
Returns the number of readable bytes which is equal to {@code (this.writerIndex - this.readerIndex)}.

    long counter;


    private void generateTraffic() {
        // Fill the outbound buffer up to 64KiB
        ByteBuf out = ctx.nextOutboundByteBuffer();
        while (out.readableBytes() < 65536) {
            out.writeBytes(content, 0, content.readableBytes());
        }


        // Flush the outbound buffer to the socket.
        // Once flushed, generate the same amount of traffic again.

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            ChannelHandlerContext ctx = directOutboundContext();
            Throwable cause = null;
            try {
                if (metadata().bufferType() == BufType.BYTE) {
                    ByteBuf out = ctx.outboundByteBuffer();
                    int oldSize = out.readableBytes();
                    try {
                        doFlushByteBuffer(out);
                    } catch (Throwable t) {
                        cause = t;
                    } finally {

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                    try {
                        doFlushByteBuffer(out);
                    } catch (Throwable t) {
                        cause = t;
                    } finally {
                        int delta = oldSize - out.readableBytes();
                        out.discardSomeReadBytes();
                        flushFutureNotifier.increaseWriteCounter(delta);
                    }
                } else {
                    MessageBuf<Object> out = ctx.outboundMessageBuffer();

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            throw new NullPointerException("value");
        }
        byte [] bytes = value.getBytes(charset.name());
        ByteBuf buffer = wrappedBuffer(bytes);
        if (definedSize > 0) {
            definedSize = buffer.readableBytes();
        }
        setContent(buffer);
    }


    @Override

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            opcode = OPCODE_CONT;
        } else {
            throw new UnsupportedOperationException("Cannot encode frame of type: " + msg.getClass().getName());
        }


        int length = data.readableBytes();


        if (logger.isDebugEnabled()) {
            logger.debug("Encoding WebSocket Frame opCode=" + opcode + " length=" + length);
        }

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            for (int i = data.readerIndex(); i < data.writerIndex(); i ++) {
                byte byteData = data.getByte(i);
                out.writeByte(byteData ^ mask[counter++ % 4]);
            }
        } else {
            out.writeBytes(data, data.readerIndex(), data.readableBytes());
        }
    }
}

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        }
        if (msgBuf) {
            outboundMessageBuffer().add(message);
        } else {
            ByteBuf buf = (ByteBuf) message;
            outboundByteBuffer().writeBytes(buf, buf.readerIndex(), buf.readableBytes());
        }
        invokeFlush0(promise);
    }


    void invokeFreeInboundBuffer() {

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                if (packet == null) {
                    return;
                }
                try {
                    ByteBuf data = packet.data();
                    int dataLen = data.readableBytes();
                    ByteBuffer nioData;


                    if (data.nioBufferCount() != -1) {
                        nioData = data.nioBuffer();
                    } else {

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    @Override
    protected int doWriteMessages(MessageBuf<Object> buf, boolean lastSpin) throws Exception {
        DatagramPacket packet = (DatagramPacket) buf.peek();
        ByteBuf data = packet.data();
        int dataLen = data.readableBytes();
        ByteBuffer nioData;
        if (data.nioBufferCount() == 1) {
            nioData = data.nioBuffer();
        } else {
            nioData = ByteBuffer.allocate(dataLen);

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                ByteBuf data = exchangeBuf.peek();
                if (data == null) {
                    return true;
                }


                if (out.writerIndex() > out.maxCapacity() - data.readableBytes()) {
                    // The target buffer is not going to be able to accept all data in the bridge.
                    out.capacity(out.maxCapacity());
                    out.writeBytes(data, out.writableBytes());
                    return false;
                } else {

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