public override int process(int runningTotal, int value)
{
if (value == 0)
{
ObserverManager.sendMessage(new ObserverMessage("Cannot divide by zero"));
// The exception still needs to be thrown as the system is in an unstable state.
throw new Exception("Cannot continue");
}
return(_proxiedClass.process(runningTotal, value));
}
static void Main(string[] args)
{
IFormula formula = new ImplFormula(new SafeSquareRootProxy(new ImplFormula(new EndPoint(), 1, 1)), 2, 2);
formula.process(0, 4);
ObserverReceiver rec = new ObserverReceiver();
ObserverManager.addHandler(new ObserverHandler(rec.ObserverHandler));
ObserverReceiverFile recFile = new ObserverReceiverFile();
ObserverManager.addHandler(new ObserverHandler(recFile.ObserverHandler));
formula = new ImplFormula(new SafeSquareRootProxyWithObserver(new ImplFormula(new EndPoint(), 1, 1)), 2, 2);
formula.process(0, 0);
}
