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Observable.Create Example
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using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Reactive.Linq; | |
using System.Threading; | |
using System.Threading.Tasks; | |
namespace Example | |
{ | |
internal class Program | |
{ | |
//Keep track of observers as they are created so we can see how many were created | |
public static readonly List<IObserver<Ticket>> Observers = new List<IObserver<Ticket>>(); | |
private static void Main() | |
{ | |
var ticketObservable = Observable.Create((Func<IObserver<Ticket>, IDisposable>)TicketFactory.TicketSubscribe); | |
var handle = ticketObservable.Subscribe(ticket => Console.WriteLine(ticket.ToString())); | |
var handle2 = ticketObservable.Subscribe(ticket => Console.WriteLine(ticket.ToString())); | |
while (true) | |
{ | |
Console.WriteLine($"Observer Count: {Observers.Count}"); | |
if (Observers.Count > 1) | |
{ | |
Console.WriteLine($"Are the first two observers the same object? {ReferenceEquals(Observers.First(), Observers[1])}"); | |
} | |
Thread.Sleep(1000); | |
} | |
} | |
} | |
internal class Ticket | |
{ | |
private readonly string ticketID; | |
private readonly DateTime timeStamp; | |
public Ticket(string tid) | |
{ | |
ticketID = tid; | |
timeStamp = DateTime.Now; | |
} | |
public override string ToString() => $"Ticket ID : {ticketID}\nTimestamp : {timeStamp}\n"; | |
} | |
public class TicketFactory : IDisposable | |
{ | |
private bool bGenerate = true; | |
internal TicketFactory(object ticketObserver) => Task.Factory.StartNew(TicketGenerator, ticketObserver); | |
public void Dispose() | |
{ | |
bGenerate = false; | |
} | |
private void TicketGenerator(object observer) | |
{ | |
var ticketObserver = (IObserver<Ticket>)observer; | |
Program.Observers.Add(ticketObserver); | |
Ticket t; | |
while (bGenerate) | |
{ | |
t = new Ticket(Guid.NewGuid().ToString()); | |
ticketObserver.OnNext(t); | |
Thread.Sleep(3000); | |
} | |
} | |
public static IDisposable TicketSubscribe(object ticketObserver) => new TicketFactory(ticketObserver); | |
} | |
} |
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