private static void OneObservableSynchronization()
{
Demo.DisplayHeader("The Synchrnoize operator - synchronizes the notifications so they will be received in a seriazlied way");
var messenger = new Messenger();
var messages =
Observable.FromEventPattern<string>(
h => messenger.MessageRecieved += h,
h => messenger.MessageRecieved -= h);
messages
.Select(evt => evt.EventArgs)
.Synchronize()
.Subscribe(msg =>
{
Console.WriteLine("Message {0} arrived", msg);
Thread.Sleep(1000);
Console.WriteLine("Message {0} exit", msg);
});
for (int i = 0; i < 3; i++)
{
string msg = "msg" + i;
ThreadPool.QueueUserWorkItem((_) =>
{
messenger.Notify(msg);
});
}
//waiting for all the other threads to complete before proceeding
Thread.Sleep(2000);
}
private static void MultipleObservableSynchronization()
{
Demo.DisplayHeader("The Synchrnoize operator - can synchronizes the notifications from multiple observables by passing the gate object");
var messenger = new Messenger();
var messages =
Observable.FromEventPattern<string>(
h => messenger.MessageRecieved += h,
h => messenger.MessageRecieved -= h);
var friendRequests =
Observable.FromEventPattern<FriendRequest>(
h => messenger.FriendRequestRecieved += h,
h => messenger.FriendRequestRecieved -= h);
var gate = new object();
messages
.Select(evt => evt.EventArgs)
.Synchronize(gate)
.Subscribe(msg =>
{
Console.WriteLine("Message {0} arrived", msg);
Thread.Sleep(1000);
Console.WriteLine("Message {0} exit", msg);
});
friendRequests
.Select(evt => evt.EventArgs)
.Synchronize(gate)
.Subscribe(request =>
{
Console.WriteLine("user {0} sent request", request.UserId);
Thread.Sleep(1000);
Console.WriteLine("user {0} approved", request.UserId);
});
for (int i = 0; i < 3; i++)
{
string msg = "msg" + i;
string userId = "user" + i;
ThreadPool.QueueUserWorkItem((_) =>
{
messenger.Notify(msg);
});
ThreadPool.QueueUserWorkItem((_) =>
{
messenger.Notify(new FriendRequest() {UserId = userId});
});
}
//waiting for all the other threads to complete before proceeding
Thread.Sleep(3000);
}