// INCOMING INVOCATION HANDLER METHODS
// ----------------------------------------------------------------------------
protected void invocationQueue(ByteBuffer buffer, ClientInputHandler handler, Connection c) {
int messageSize = buffer.capacity();
RpcCallback<ClientResponseImpl> callback = new ClientResponseCallback(this.clientInterface, c, messageSize);
this.clientInterface.increaseBackpressure(messageSize);
if (this.preProcessorQueue != null) {
this.preProcessorQueue.add(Pair.of(buffer, callback));
} else {