public void consumeSendCredit() {
        sendCredits.decrementAndGet();
    }
    
    public void grantSendCredit() {
        sendCredits.incrementAndGet();
    }
    
    public void grantReceiveCredit() {
        receiveCredits.incrementAndGet();
    }
    
    public int getAvailableSendCredits() {
        return sendCredits.get();
    }
    
    public int getAvailableReceiveCredits() {