} else if (opcode == 0x0A || opcode == 0x10) { // NOOP or STATS
// TODO once we support setQ we need to wait for them to flush
ChannelBuffer writeBuffer = ChannelBuffers.dynamicBuffer(24);
writeBuffer.writeByte(0x81); // magic
writeBuffer.writeByte(opcode); // opcode
writeBuffer.writeShort(0); // key length
writeBuffer.writeByte(0); // extra length = flags + expiry
writeBuffer.writeByte(0); // data type unused
writeBuffer.writeShort(0x0000); // OK
writeBuffer.writeInt(0); // data length
writeBuffer.writeInt(opaque); // opaque