PollingState.java

private static final PollingState {
    private static final int MAX_RETRIES = 2;
    
    private boolean resultObtained = false;
    private int requestCount = 0;
    
    public Func0<Boolean> shouldContinue() {
        return () -> requestCount <= MAX_RETRIES && !resultObtained;
    }
    
    public resultObtained() {
        resultObtained = true;
    }
    
    public void increment() {
        requestCount++;
    }
}