static void Main(string[] args)
{
// Our main class is a car. We will create 3 cars
Car CarNo1 = new Car("Car Number 1");
Car CarNo2 = new Car("Car Number 2");
Car CarNo3 = new Car("Car Number 3");
// Sometime during the process we might want a drink
Kettle kettle = new Kettle();
// each car has 4 methodsm StartEngine,TurnLightsOn,TurnLightsOff and StopEngine
// we create a command class which the broker class will use to call the correct method of the correct car.
ICommand Car1StartEngine = new StartEngine(CarNo1);
ICommand Car2StartEngine = new StartEngine(CarNo2);
ICommand Car3StartEngine = new StartEngine(CarNo3);
ICommand Car1TurnLightsOn = new TurnLightsOn(CarNo1);
ICommand Car2TurnLightsOn = new TurnLightsOn(CarNo2);
ICommand Car3TurnLightsOn = new TurnLightsOn(CarNo3);
ICommand Car1TurnLightsOff = new TurnLightsOff(CarNo1);
ICommand Car2TurnLightsOff = new TurnLightsOff(CarNo2);
ICommand Car3TurnLightsOff = new TurnLightsOff(CarNo3);
ICommand Car1StopEngine = new StopEngine(CarNo1);
ICommand Car2StopEngine = new StopEngine(CarNo2);
ICommand Car3StopEngine = new StopEngine(CarNo3);
ICommand boilKettle = new BoilKettle(kettle);
// we add the list of instructions into the broker class
// if we change the order added, the order in which the methods are called changes
// the proker class can operate in other ways aswell
Broker Instructions = new Broker();
Instructions.AddCommand(Car1StartEngine);
Instructions.AddCommand(Car2StartEngine);
Instructions.AddCommand(Car3StartEngine);
Instructions.AddCommand(Car1TurnLightsOff);
Instructions.AddCommand(Car2TurnLightsOff);
Instructions.AddCommand(Car3TurnLightsOff);
Instructions.AddCommand(Car1TurnLightsOn);
Instructions.AddCommand(Car2TurnLightsOn);
Instructions.AddCommand(Car3TurnLightsOn);
// Have a brew. The Broker has no idea what it is doing
// so a completely different type can be used in the same list
// so long as it implemts ICommand
Instructions.AddCommand(boilKettle);
Instructions.AddCommand(Car1StopEngine);
Instructions.AddCommand(Car2StopEngine);
Instructions.AddCommand(Car3StopEngine);
// After the broker class has been configured, we tell it to exectute all the commands
Instructions.ExecuteCommands();
}