public static CommandQuery FromEvent <TEvent>(this CommandQueryBuilder builder, Task <TEvent> currentValue, Func <TEvent?, bool> check)
where TEvent : class
{
var context = ExposedReceiveActor.ExposedContext;
return(builder.FromExternal(check, action =>
{
currentValue.ContinueWith(t =>
{
if (t.IsCompleted)
{
action(t.Result);
}
});
context.ActorOf(dsl =>
{
dsl.OnPreStart += actorContext => actorContext.System.EventStream.Subscribe <TEvent>(actorContext.Self);
dsl.OnPostStop += actorContext => actorContext.System.EventStream.Unsubscribe(actorContext.Self);
dsl.Receive <TEvent>((e, c) => action(e));
});
}));
}
public static CommandQuery FromEventSource <TData>(this CommandQueryBuilder builder, IEventSource <TData> source, Func <TData, bool> check)
where TData : class
=> builder.FromExternal <TData>(d => d != null && check(d), action => source.RespondOn(ActorCell.GetCurrentSelfOrNoSender() ?? ActorRefs.Nobody, action));
public static CommandQuery FromEventSource <TData>(this CommandQueryBuilder builder, IEventSource <TData> source, Func <TData, bool> check, TData defaultValue) => builder.FromExternal(check, action => source.RespondOn(ActorCell.GetCurrentSelfOrNoSender() ?? ActorRefs.Nobody, action), defaultValue);