Example usage for io.netty.buffer ByteBuf discardReadBytes

Introduction

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

Prototype

public abstract ByteBuf discardReadBytes();

Source Link

Document

Discards the bytes between the 0th index and readerIndex .

Usage

From source file:org.virtue.network.protocol.event.GameEventDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf buf, List<Object> out) throws Exception {
    if (buf.isReadable()) {
        int opcode = buf.readByte() - cipher.nextInt() & 0xFF;
        if (opcode < 0) {
            buf.discardReadBytes();
            return;
        }//from www  . ja v a  2 s  .c  om
        int length = Constants.PACKET_SIZES[opcode];
        if (length < 0) {
            switch (length) {
            case -1:
                if (buf.isReadable()) {
                    length = buf.readByte() & 0xff;
                }
                break;
            case -2:
                if (buf.readableBytes() >= 2) {
                    length = buf.readShort() & 0xffff;
                }
                break;
            default:
                length = buf.readableBytes();
                break;
            }
        }
        if (buf.readableBytes() >= length) {
            if (length < 0) {
                return;
            }
            byte[] payload = new byte[length];
            buf.readBytes(payload, 0, length);
            out.add(new GameEventMessage(opcode, new InboundBuffer(payload)));
        }
    }
}