public static IObservable <IEnumerable <TTarget> > ApplyEvent <TEvent, TTarget, TContext>(
this IObservable <TEvent> source,
IEventProcessor <TTarget, TContext, TEvent> eventProcessor,
TContext context,
IEventProcessorTrace <TTarget, TContext, TEvent> trace = null
)
where TEvent : IEvent
{
return(source.Where(change => eventProcessor.CanExecute(change, context))
.Select(change =>
{
return eventProcessor.Execute(change, context, trace);
}));
}
public static IObservable <IChangeSet <IEnumerable <TTarget>, TKey> > ApplyEvent <TEvent, TKey, TTarget, TContext>(
this IObservable <IChangeSet <TEvent, TKey> > source,
IEventProcessor <TTarget, TContext, TEvent> eventProcessor,
TContext context,
IEventProcessorTrace <TTarget, TContext, TEvent> trace = null
)
where TEvent : IEvent
{
return(source
.Filter(change => eventProcessor.CanExecute(change, context))
.Transform(change =>
{
return eventProcessor.Execute(change, context, trace);
}));
}
public static IObservable <IChangeSet <TEvent, TKey> > RaiseEvent <TEvent, TKey, TTarget, TContext>(
this IObservable <IChangeSet <TEvent, TKey> > source,
IEventProcessor <TTarget, TContext, TEvent> eventProcessor,
TContext context,
IEventProcessorTrace <TTarget, TContext, TEvent> trace = null
)
where TEvent : IEvent
{
return(source
.Filter(change => eventProcessor.CanExecute(change, context))
.Do(changes =>
{
foreach (var change in changes)
{
eventProcessor.Execute(change.Current, context, trace);
}
}));
}
public IEnumerable <TTarget> Execute(TEvent ev, TContext context, IEventProcessorTrace <TTarget, TContext, TEvent> trace)
{
var nodes = _sortedGraph.Where(n => n.Value.Accept(ev));
var notifiables = GetNotifiables(ev, context);
foreach (var node in nodes)
{
if (null != trace)
{
trace.Visit(node, ev, notifiables.Count());
}
ProcessNode(node, ev, notifiables, context);
}
return(notifiables);
}
