static void Main(string[] args)
{
// create the data source
// note: we cannot create more than one of these right now (limitation on the unmanaged side for simplicity)
IObservable <NativeData> source = new NativeObservable();
// create the stream processor
var inputStream = source
.Select(e => StreamEvent.CreateStart(DateTime.Now.Ticks, e))
.ToStreamable(
null,
FlushPolicy.FlushOnPunctuation,
PeriodicPunctuationPolicy.Time((ulong)TimeSpan.FromSeconds(1).Ticks));
// The query
long windowSize = TimeSpan.FromSeconds(2).Ticks;
var query = inputStream
.AlterEventDuration(windowSize)
// we "filter" using our unmanaged matcher
.Where(e => NativeSubscription.MatchData(e.Data))
.Select(e => e.Data);
// Egress results and write to console
query.ToStreamEventObservable().ForEachAsync(e => WriteEvent(e)).Wait();
}
/// <summary>
/// Creates a native subscription
/// </summary>
/// <param name="observable"></param>
/// <param name="observer"></param>
public NativeSubscription(NativeObservable observable, IObserver <NativeData> observer)
{
this.observer = observer;
lock (this.sync)
{
this.pinnedDelegate = new NativeMethods.NativeCallback(HandleNativeEvent);
NativeMethods.RegisterNativeCallback(this.pinnedDelegate);
}
}