public void Publish()
{
currentSerialNumber++;
var newspaper = new Newspaper(currentSerialNumber, "HURRY TO READ!", "The Times Bla-bla-bla...");
NewspaperPublished?.Invoke(newspaper);
}
public void Publish()
{
currentSerialNumber++;
var newspaper = new Newspaper(currentSerialNumber, "HOT NEWS", "The New York Times Bla-bla-bla...");
NewspaperPublished?.Invoke(newspaper);
}
static void Main(string[] args)
{
var publisher = new Publisher();
var insta = new Instagram();
var newspaper = new Newspaper();
publisher.Subscribe(insta);
publisher.Subscribe(newspaper);
publisher.GetNewPost("The observer pattern is easy");
}
internal static void NewsTest()
{
// Create news agencies (providers).
var associatedPress = new Agency("Associated Press");
var reuters = new Agency("Reuters");
// Create newspapers (observers).
var newYorkTimes = new Newspaper("The New York Times");
var washingtonPost = new Newspaper("The Washington Post");
// AP publication. Neither newspaper subscribes, so no output.
associatedPress.Publish("Waiting the worst with Harvey, the storm that won’t go away", "Juliet Linderman");
// Times subscribes to AP.
newYorkTimes.Subscribe(associatedPress);
// Post subscribes to Reuters.
washingtonPost.Subscribe(reuters);
// Reuters publications.
reuters.Publish("Japan retail sales slow in July, still top expectations", "Stanley White");
reuters.Publish("Transgender members in U.S. military may serve until study completed: Mattis", "Reuters Staff");
// AP publications.
associatedPress.Publish("Chicago changes course, wants police reforms with court role", "Don Babwin and Michael Tarm");
associatedPress.Publish("US Open fashion: Crystals, shapes and knee-high socks", "James Martinez");
// Post subscribes to AP.
washingtonPost.Subscribe(associatedPress);
// AP Publications, both Times and Post should receive.
associatedPress.Publish("Game of Thrones: Trust me, I’m a Targaryen", "Paul Wiseman, Josh Boak, and Christopher Rugaber");
associatedPress.Publish("Merkel: Europe still ‘hasn’t done homework’ on refugees", "Geir Moulson");
// Post unsubscribes from AP.
washingtonPost.Unsubscribe(associatedPress);
// AP publication, should only be picked up by Times.
associatedPress.Publish("Hajj pilgrimage entangled in web of Saudi politics", "Aya Batrawy");
// Perform cleanup for AP.
associatedPress.Shutdown();
// Few more Reuters publications.
reuters.Publish("Google, Apple face off over augmented reality technology", "Stephen Nellis");
reuters.Publish("Under investor pressure, Goldman to explain trading strategy", "Olivia Oran");
reuters.Publish("UK retailers see Brexit hit to consumers without detailed customs plans", "Reuters Staff");
}
public void OnNewspaperPublished(Newspaper newspaper)
{
Console.WriteLine("Reading " + newspaper.Content);
}