public static IObservable <double> Animate(
this IObservable <double> destinations,
Func <double, double, IObservable <double> > animate)
{
return(Observable
.Create <double>(observer =>
{
var results = new BehaviorSubject <double>(double.NaN);
return Disposable.Combine(
results,
results.Skip(1).Subscribe(observer),
destinations.SubscribeUsing(destination =>
{
var source = results.Value;
if (double.IsNaN(source))
{
// No previous value, jump to destination
results.OnNext(destination);
return Disposable.Empty;
}
// we have a source and a destination, let's animate between them
// and emit the results (until we're disposed by a new destination)
return animate(source, destination).Subscribe(results.OnNext);
}));
})
.Replay(1).RefCount());
}
internal RedisLogger(string key, ILog log, IRedisConnectionFactory redisConnectionFactory)
{
this.key = string.Format(CultureInfo.InvariantCulture, "{0}:{1}", log.Logger.Name, key);
this.log = log;
this.messagesSubject = new ReplaySubject<Tuple<string, string>>(100, TimeSpan.FromSeconds(5));
this.retry = new BehaviorSubject<bool>(false);
var redisOnConnectionAction = new Action<Task<RedisConnection>>(task =>
{
if (task.IsCompleted && !task.IsFaulted)
{
Interlocked.CompareExchange<RedisConnection>(ref this.redisConnection, task.Result, null);
subscription = messagesSubject.TakeUntil(retry.Skip(1)).Subscribe((item) =>
{
redisConnection.Publish(item.Item1, item.Item2).ContinueWith(taskWithException =>
{
taskWithException.Exception.Handle(ex => true);
}, TaskContinuationOptions.OnlyOnFaulted);
});
}
});
var redisOnErrorAction = new Action<ErrorEventArgs>(ex =>
{
if (ex.IsFatal)
{
retry.OnNext(true);
Interlocked.Exchange<RedisConnection>(ref this.redisConnection, null);
}
});
Action subscribeAction = () =>
{
var connectionTask = redisConnectionFactory.CreateRedisConnection();
connectionTask.ContinueWith(taskConnection =>
{
if (!taskConnection.IsFaulted)
{
taskConnection.ContinueWith(redisOnConnectionAction);
taskConnection.Result.Error += (_, err) => redisOnErrorAction(err);
}
else
{
taskConnection.Exception.Handle(_ => true);
this.retry.OnNext(true);
}
});
};
retry.Subscribe(val =>
{
if (val)
Observable.Timer(TimeSpan.FromSeconds(10)).Subscribe(_ => subscribeAction());
else
subscribeAction();
});
}
/// <summary>
/// Initializes a new instance of the <see cref="ReactiveCommand"/> class.
/// </summary>
/// <param name="canExecute">if set to <c>true</c> [can execute].</param>
public ReactiveCommand(bool canExecute = false)
{
_canExecuteSource = new BehaviorSubject <bool>(canExecute);
_canExecuteSource
.Zip(_canExecuteSource.Skip(1),
(x, y) =>
x != y)
.Where(x =>
x && CanExecuteChanged != null)
.Subscribe(_ =>
CanExecuteChanged(this, EventArgs.Empty));
_executeSource = new Subject <EventPattern <EventCommandEventArgs> >();
}
/// <summary>
/// Initializes a new instance of the <see cref="ReactiveCommand"/> class.
/// </summary>
/// <param name="canExecute">if set to <c>true</c> [can execute].</param>
public ReactiveCommand(bool canExecute = false)
{
_canExecuteSource = new BehaviorSubject<bool>(canExecute);
_canExecuteSource
.Zip(_canExecuteSource.Skip(1),
(x, y) =>
x != y)
.Where(x =>
x && CanExecuteChanged != null)
.Subscribe(_ =>
CanExecuteChanged(this, EventArgs.Empty));
_executeSource = new Subject<EventPattern<EventCommandEventArgs>>();
}
private void InitIpAddressProperty()
{
Observable
.Defer(() => Observable.Return(GetTurncatedIpAddress()))
.SelectMany(turncatedIp => BlobCache
.UserAccount
.GetObject <string>("ipAddress")
.Catch(Observable.Return($"{turncatedIp}.0"))
.Merge(_hostAddressSubject
.Skip(1)
.DoWhere(x => x == 256, _ => ConnectionState = ConnectionState.Failed("Couldn't connect to Clock"))
.Where(x => x < 256 && ConnectionState.Type != StateType.Connected)
.Select(x => $"{turncatedIp}.{x}")))
.Catch <string, Exception>(HandleException <string>)
.ToPropertyEx(this, x => x.IpAddress);
}
public IObservable <Position> Listen(int minUpdateTime, double minUpdateDist, bool includeHeading = false)
{
DateTimeOffset?lastStamp = null;
Position lastPos = null;
return(_latestPosition.Skip(1)
.Timestamp(_scheduler)
.Where(x => {
var ret = lastStamp == null || x.Timestamp - lastStamp > TimeSpan.FromMilliseconds(minUpdateTime);
lastStamp = x.Timestamp;
return ret;
})
.Where(x => {
var ret = lastPos == null || distForPos(lastPos, x.Value) > minUpdateDist;
lastPos = x.Value;
return ret;
})
.Select(x => x.Value));
}
public void Test3()
{
IObservable <int> CreateRecursive(int count)
{
var source = new BehaviorSubject <int>(0);
var transfer = source.Select(x => ++ x);
var guard = source.Skip(count).Subscribe(_ => source.OnCompleted());
return(Observable.Create <int>(observer => new CompositeDisposable
{
source.Subscribe(observer),
transfer.Subscribe(source),
guard
}));
}
var res = CreateRecursive(5).ToEnumerable();
CollectionAssert.AreEqual(new [] { 0, 1, 2, 3, 4 }, res);
}
