/// <summary>
/// he following example contains the application entry point that instantiates the BaggageHandler class as well as two instances of
/// the ArrivalsMonitor class, and uses the BaggageHandler.BaggageStatus method to add and remove information about arriving flights. In each
/// case, the observers receive updates and correctly display baggage
/// claim information.
/// </summary>
public void Status()
{
BaggageHandler provider = new BaggageHandler();
ArrivalMonitors observer1 = new ArrivalMonitors("BaggageClaimMonitor1");
ArrivalMonitors observer2 = new ArrivalMonitors("SecurityExit");
provider.BaggageStatus(712, "Detroit", 3);
observer1.Subscribe(provider);
provider.BaggageStatus(712, "Kalamazoo", 3);
provider.BaggageStatus(400, "New York-Kennedy", 1);
provider.BaggageStatus(712, "Detroit", 3);
observer2.Subscribe(provider);
provider.BaggageStatus(511, "San Francisco", 2);
provider.BaggageStatus(712);
observer2.UnSubscribe();
provider.BaggageStatus(400);
provider.LastBaggageClaimed();
// Output
// The example displays the following output:
// Arrivals information from BaggageClaimMonitor1
// Detroit 712 3
//
// Arrivals information from BaggageClaimMonitor1
// Detroit 712 3
// Kalamazoo 712 3
//
// Arrivals information from BaggageClaimMonitor1
// Detroit 712 3
// Kalamazoo 712 3
// New York-Kennedy 400 1
//
// Arrivals information from SecurityExit
// Detroit 712 3
//
// Arrivals information from SecurityExit
// Detroit 712 3
// Kalamazoo 712 3
//
// Arrivals information from SecurityExit
// Detroit 712 3
// Kalamazoo 712 3
// New York-Kennedy 400 1
//
// Arrivals information from BaggageClaimMonitor1
// Detroit 712 3
// Kalamazoo 712 3
// New York-Kennedy 400 1
// San Francisco 511 2
//
// Arrivals information from SecurityExit
// Detroit 712 3
// Kalamazoo 712 3
// New York-Kennedy 400 1
// San Francisco 511 2
//
// Arrivals information from BaggageClaimMonitor1
// New York-Kennedy 400 1
// San Francisco 511 2
//
// Arrivals information from SecurityExit
// New York-Kennedy 400 1
// San Francisco 511 2
//
// Arrivals information from BaggageClaimMonitor1
// San Francisco 511 2
}
/// <summary>
/// The ArrivalsMonitor class includes the Subscribe and Unsubscribe methods. The Subscribe method enables the class to save the IDisposable implementation returned by
/// the call to Subscribe to a private variable
/// </summary>
/// <param name="provider"></param>
public void Subscribe(BaggageHandler provider)
{
cancellation = provider.Subscribe(this);
}
