Action <EventStoreCatchUpSubscription, ResolvedEvent> EventAppeared(IProjection projection)
{
return((s, e) =>
{
if (!projection.CanHandle(e.Event.EventType))
{
return;
}
var deserializedEvent = e.Deserialize();
projection.Handle(e.Event.EventType, deserializedEvent);
UpdatePosition(projection.GetType(), e.OriginalPosition.Value);
});
}
Func <StreamSubscription, ResolvedEvent, CancellationToken, Task> EventAppeared(IProjection projection)
{
return(async(s, e, ct) =>
{
Console.WriteLine(
$"Handling Projection {projection.GetType().Name} event {e.Event.EventType} id: {e.Event.EventId}");
if (!projection.CanHandle(e.Event.EventType))
{
return;
}
var deserializedEvent = e.Deserialize();
await projection.HandleAsync(e.Event.EventType, deserializedEvent, ct);
await UpdatePositionAsync(projection.GetType(), e.OriginalPosition !.Value, ct);
});
}
Action <EventStoreCatchUpSubscription, ResolvedEvent> EventAppeared(IProjection projection)
{
return((s, e) =>
{
if (!projection.CanHandle(e.Event.EventType))
{
UpdatePosition(projection.GetType(), e.OriginalPosition.Value);
return;
}
Console.WriteLine("Processing");
Console.WriteLine(e.Event.EventStreamId);
Console.WriteLine(e.Event.EventNumber);
Console.WriteLine(e.Event.EventType);
var deserializedEvent = e.Deserialize();
projection.Handle(e.Event.EventType, deserializedEvent);
UpdatePosition(projection.GetType(), e.OriginalPosition.Value);
});
}
private Action <EventStoreCatchUpSubscription, ResolvedEvent> EventAppeared(IProjection projection)
{
return((subscription, resolvedEvent) =>
{
var currentPosition = resolvedEvent.OriginalPosition;
var projectionId = projection.Id;
try
{
var @event = resolvedEvent.Event;
if (!projection.CanHandle(@event.EventType))
{
return;
}
var deserializedEvent = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(resolvedEvent.Event.Data), new JsonSerializerSettings {
TypeNameHandling = TypeNameHandling.Objects
});
projection.Handle(@event.EventType, deserializedEvent);
positionStore.Update(projectionId, currentPosition);
log.Debug($"EVENT HANDLED: EventType: {@event.EventType} AggregateId: {resolvedEvent.OriginalStreamId} Projection: {projectionId}");
}
catch (Exception exception)
{
var aggregateId = resolvedEvent.OriginalStreamId;
var position = currentPosition.HasValue ? currentPosition.ToString() : "unknown";
log.Error(
$"EXCEPTION DURING PROJECTION UPDATE - AggregateId: {aggregateId} Projection: {projectionId} Position: {position}",
exception);
try
{
positionStore.OnError(projectionId, resolvedEvent.Event.EventType, aggregateId, currentPosition, exception);
}
catch (Exception ex)
{
log.Error($"EXCEPTION DURING ERROR POSITION UPDATE - AggregateId: {aggregateId} Projection: {projectionId} Position: {position}", ex);
}
}
});
}
