static void Main(string[] args)
{
WeatherData weatherData = new WeatherData();
CurrentConditionsDisplay currentDisplay = new CurrentConditionsDisplay(weatherData);
StatisticsDisplay statisticsDisplay = new StatisticsDisplay(weatherData);
ForecastDisplay forecastDisplay = new ForecastDisplay(weatherData);
HeatIndexDisplay heatIndexDisplay = new HeatIndexDisplay(weatherData);
Measurements measurements = new Measurements
{
humidity = 65F,
pressure = 30.4F,
temperature = 80F
};
weatherData.SetMeasurements(measurements);
measurements.humidity = 70F;
measurements.pressure = 29.2F;
measurements.temperature = 82F;
weatherData.SetMeasurements(measurements);
measurements.humidity = 90F;
measurements.pressure = 29.2F;
measurements.temperature = 78F;
weatherData.SetMeasurements(measurements);
}
public static void Main(string[] args)
{
WeatherData weatherData = new WeatherData();
CurrentConditionsDisplay currentConditions = new CurrentConditionsDisplay(weatherData);
StatisticsDisplay statisticsDisplay = new StatisticsDisplay(weatherData);
ForecastDisplay forecastDisplay = new ForecastDisplay(weatherData);
Console.ReadLine();
}
static void Main(string[] args)
{
WeatherData weatherData = new WeatherData();
CurrentConditionsDisplay ccd = new CurrentConditionsDisplay(weatherData);
ForecastDisplay fd = new ForecastDisplay(weatherData);
StatisticsDisplay sd = new StatisticsDisplay(weatherData);
ThirdPartyDisplay tpd = new ThirdPartyDisplay(weatherData);
weatherData.SetMeasurements(15, 75, 30);
weatherData.SetMeasurements(18, 80, 31.2);
weatherData.SetMeasurements(18, 75, 32.8);
Console.ReadKey(true);
}
static void Main(string[] args)
{
WeatherData weatherData = new WeatherData();
CurrentConditionsDisplay currentDisplay = new CurrentConditionsDisplay(weatherData);
StatisticsDisplay statisticsDisplay = new StatisticsDisplay(weatherData);
ForecastDisplay forecastDisplay = new ForecastDisplay(weatherData);
HeatIndexDisplay heatIndexDisplay = new HeatIndexDisplay(weatherData);
weatherData.setMeasurements(80, 65, 30.4f);
weatherData.setMeasurements(82, 70, 29.2f);
weatherData.setMeasurements(78, 90, 29.2f);
}
public void Main()
{
WeatherData weatherData = new WeatherData();
CurrentConditionsDisplay currentConditionsDisplay = new CurrentConditionsDisplay(weatherData);
StatisticsDisplay statisticsDisplay = new StatisticsDisplay(weatherData);
ForecastDisplay forecastDisplay = new ForecastDisplay(weatherData);
HeatIndexDisplay heatIndexDisplay = new HeatIndexDisplay(weatherData);
weatherData.SetMeasurementsChanged(80, 65, 30.4f);
Console.WriteLine("===========================================");
weatherData.SetMeasurementsChanged(82, 70, 29.2f);
Console.WriteLine("===========================================");
weatherData.SetMeasurementsChanged(78, 90, 29.2f);
}
static void Main(string[] args)
{
WeatherData weatherData = new WeatherData();
//Инициализация наблюдателей
CurrentConditionsDisplay currentDisplay = new CurrentConditionsDisplay(weatherData);
StatisticsDisplay statisticsDisplay = new StatisticsDisplay(weatherData);
ForecastDisplay forecastDisplay = new ForecastDisplay(weatherData);
//Обновление данных
weatherData.setMeasurements(80, 45, 34.5f);
//Удаление одного из наблюдателей
statisticsDisplay.remove();
weatherData.setMeasurements(45, 34, 37.6f);
weatherData.setMeasurements(49, 45, 38.5f);
}
static void Main(string[] args)
{
WeatherData weatherData = new WeatherData();
Console.WriteLine("--------公告板1加入观察者-------");
CurrentConditionDisplay display1 = new CurrentConditionDisplay(weatherData);
weatherData.SetMessureMents(10, 20, 30);
Console.WriteLine("--------公告板2加入观察者-------");
ForecastDisplay display2 = new ForecastDisplay(weatherData);
weatherData.SetMessureMents(15, 25, 35);
Console.WriteLine("--------公告板1退出观察者-------");
weatherData.RemoveObserver(display1);
weatherData.SetMessureMents(19, 29, 39);
}
static void Main(string[] args)
{
var meteostation = new Meteostation();
var weatherData = new WeatherData(meteostation);
var currentConditionDisplay = new CurrentConditionDisplay(weatherData);
meteostation.mesurementsChanged();
var forecastDisplay = new ForecastDisplay(weatherData);
meteostation.mesurementsChanged();
currentConditionDisplay.Unsubscribe();
meteostation.mesurementsChanged();
var statisticsDisplay = new StatisticsDisplay(weatherData);
currentConditionDisplay.Subscribe(weatherData);
meteostation.mesurementsChanged();
}
static void Main()
{
// First example
ConcreteSubject s = new ConcreteSubject();
s.Attach(new ConcreteObserver(s, "x"));
s.Attach(new ConcreteObserver(s, "y"));
s.Attach(new ConcreteObserver(s, "z"));
s.SubjectState = "abc";
s.Notify();
IBM ibm = new IBM("IBM", 120.00);
ibm.Attach(new Investor("Sorros"));
ibm.Attach(new Investor("Berkshire"));
ibm.Price = 120.10;
ibm.Price = 121.00;
ibm.Price = 120.50;
ibm.Price = 120.75;
ibm.Notify();
// Second example
BaggageHandler provider = new BaggageHandler();
ArrivalsMonitor observer1 = new ArrivalsMonitor("BaggageClaimMonitor1");
ArrivalsMonitor observer2 = new ArrivalsMonitor("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();
// Third example
var weatherData = new WeatherData();
var forecastDisplay = new ForecastDisplay(weatherData);
var heatIndexDisplay = new HeatIndexDisplay(weatherData);
weatherData.setMeasurements(80, 65, 30.4f);
}
static void Main(string[] args)
{
Console.WriteLine("Weather Station");
Console.WriteLine();
WeatherData weatherData = new WeatherData();
CurrentConditionsDisplay currentDisplay = new CurrentConditionsDisplay(weatherData);
StatisticsDisplay statisticsDisplay = new StatisticsDisplay(weatherData);
ForecastDisplay forecastDisplay = new ForecastDisplay(weatherData);
HeatIndexDisplay heatIndexDisplay = new HeatIndexDisplay(weatherData);
weatherData.SetMeasurements(80, 65, 30.4f);
Console.WriteLine();
weatherData.SetMeasurements(87, 70, 29.2f);
Console.WriteLine();
weatherData.SetMeasurements(78, 90, 29.2f);
Console.WriteLine();
weatherData.SetMeasurements(65, 75, 29.2f);
Console.WriteLine();
int temp, hum;
float press;
Console.Write("What is the current Temperature? T: ");
temp = Int32.Parse(Console.ReadLine());
Console.Write("What is the current Humidity? H: ");
hum = Int32.Parse(Console.ReadLine());
Console.Write("What is the current Pressure? P: ");
press = float.Parse(Console.ReadLine());
Console.WriteLine();
weatherData.SetMeasurements(temp, hum, press);
Console.WriteLine();
Console.ReadKey();
}
static void Main(string[] args)
{
/*
* The Observer Pattern
*
* Example:
* A publisher creates a new magazine and begins publishing issues.
* You subscribve and receive issues as along as you stay subscribed.
* You can unsubscribe at any time.
* Others can also subscribe.
* Other can also unsubscribe.
* If Publisher ceases business, you stop receiving issues.
*
* Allows:
* -Subjests and Observers are "loosely coupled"
* -Strive for loosely coupled designs between objects that interact. (Design Principle #4)
*
* Implementation (Push):
*
* We define 3 interfaces:
* -ISubject (implemented by publisher, stores the list of subscribers, notifies on updates)
* -IObserver (implemented by subscriber, update method)
* -IDisplayElement (implemented by subscriber, display method)
*
* We define main class WatherData:
* -WatherData that implements ISubject
* -Notifies observers(subscribers) though method Update()
* -This doesn't know anything about observers
* -Subject doesn't care it keeps doing its job
*
* We define subscriber classes:
* -Each implements interfaces IObserver and IDisplayElement just to display info
* -Each receives Subject(Publisher) in constructor, subscribes itself to it, and keeps it in private field
* -To become an observer it needs to implement IObserver
*
*/
//create concrete subject(publisher)
WeatherData weatherData = new WeatherData();
//create Observer(subscriber) and register with Subject(publisher)
CurrentConditionsDisplay currentConditions = new CurrentConditionsDisplay(weatherData); //subscribe in constructor of observer(subscriber), PUSH subscription
//create more Observers(subscribers)
weatherData.RegisterObserver(new StatisticsDisplay(weatherData)); //subscribe in method of subject(publisher), PULL subscription
ForecastDisplay forecastDisplay = new ForecastDisplay(weatherData);
//refresh data at Subject(publisher), simulate new data from sensors
weatherData.SetMeasurements(new Data()
{
Temp = 80,
Humidity = 65,
Pressure = 29.2
});
weatherData.SetMeasurements(new Data()
{
Temp = 82,
Humidity = 70,
Pressure = 30.4
});
weatherData.SetMeasurements(new Data()
{
Temp = 78,
Humidity = 90,
Pressure = 29.4
});
Console.ReadLine();
}