static void Main(string[] args)
{
Console.WriteLine("Observer Pattern example");
Console.WriteLine("------------------------");
var consoleClocks = new List<IConsoleClock>();
var clockSubject = new ClockSubject();
consoleClocks.Add(new GMTConsoleClock(clockSubject));
consoleClocks.Add(new SecondsCountingConsoleClock(clockSubject));
var isRunning = true;
while (isRunning)
{
Console.WriteLine();
Console.WriteLine("Setting Time to now...");
clockSubject.SetState(new ClockState());
Console.WriteLine("Printing updated values from Clock Observers...");
foreach (var clock in consoleClocks)
{
clock.WriteStateToConsole();
}
Console.WriteLine();
Console.WriteLine("X key to exit, any key to repeat.");
var key = Console.ReadKey();
if (key.Key == ConsoleKey.X)
{
isRunning = false;
}
}
}
public GMTConsoleClock(ClockSubject clockSubject)
{
// register with the clock subject for updates
this.clockSubject = clockSubject;
clockSubject.Attach(this);
}
public SecondsCountingConsoleClock(ClockSubject clockSubject)
{
// register with the clock subject for updates
this.clockSubject = clockSubject;
clockSubject.Attach(this);
}