private static IDisposable RegisterService <TEvent>(
this IEventStream eventStream,
Action onStart,
Action onStop,
Action onPrepare = null,
Action <TEvent> onNext = null,
string name = null)
{
var disposables = new CompositeDisposable(capacity: 4);
if (onNext != null)
{
eventStream
.OfType <TEvent>()
.Subscribe(onNext)
.DisposeWith(disposables);
}
if (onPrepare != null)
{
eventStream
.OfType <IRequestFor <TEvent> >()
.Subscribe(_ => onPrepare())
.DisposeWith(disposables);
}
if (onStart != null)
{
eventStream
.OfType <ISubscriptionOf <TEvent> >()
.Subscribe(_ =>
{
onStart();
eventStream.Push(new ServiceStartedEvent(name));
})
.DisposeWith(disposables);
}
if (onStop == null)
{
eventStream
.OfType <IUnsubscriptionOf <TEvent> >()
.Subscribe(_ =>
{
onStop();
eventStream.Push(new ServiceStoppedEvent(name));
})
.DisposeWith(disposables);
}
eventStream.Push(new ServiceRegisteredEvent(name));
return(disposables);
}
/// <summary>
/// Observes the events of a given name.
/// </summary>
public static IObservable <Unit> OfName(
this IEventStream eventStream,
string name)
{
var none = Unit.Default;
return(eventStream
.OfType <string>()
.Where(_ => _ == name)
.Select(_ => none)
.Merge(eventStream
.OfType <IStringEvent>()
.Where(_ => _.Name == name)
.Select(_ => none)));
}
/// <summary>
/// Observes the events of a given name.
/// </summary>
private static IObservable <IStringEvent <T> > OfNamedString <T>(
this IEventStream eventStream,
string name)
{
return(eventStream
.OfType <IStringEvent <T> >()
.Where(_ => _.Name == name));
}
/// <summary>
/// Observes the events of a given type.
/// </summary>
public static IDisposable OfType <TEvent>(
this IEventStream eventStream,
Action <TEvent> onNext)
{
return(eventStream.OfType <TEvent>().Subscribe(onNext));
}