public static IEventHandlerBuilder <IRoadNetworkCommandQueue, TEvent> UseRoadNetworkCommandQueue <TEvent>(
this IEventHandlerBuilder <TEvent> builder, IStreamStore store)
{
if (store == null)
{
throw new ArgumentNullException(nameof(store));
}
return(builder.Pipe <IRoadNetworkCommandQueue>(next => (message, ct) => next(new RoadNetworkCommandQueue(store), message, ct)));
}
public static IEventHandlerBuilder <IRoadRegistryContext, TCommand> UseRoadRegistryContext <TCommand>(
this IEventHandlerBuilder <TCommand> builder, IStreamStore store, IRoadNetworkSnapshotReader snapshotReader, EventEnricher enricher)
{
if (store == null)
{
throw new ArgumentNullException(nameof(store));
}
if (enricher == null)
{
throw new ArgumentNullException(nameof(enricher));
}
return(builder.Pipe <IRoadRegistryContext>(next => async(message, ct) =>
{
var map = new EventSourcedEntityMap();
var context = new RoadRegistryContext(map, store, snapshotReader, SerializerSettings, EventMapping);
await next(context, message, ct);
foreach (var entry in map.Entries)
{
var events = entry.Entity.TakeEvents();
if (events.Length != 0)
{
var messageId = message.MessageId.ToString("N");
var version = entry.ExpectedVersion;
Array.ForEach(events, @event => enricher(@event));
var messages = Array.ConvertAll(
events,
@event =>
new NewStreamMessage(
Deterministic.Create(Deterministic.Namespaces.Events,
$"{messageId}-{version++}"),
EventMapping.GetEventName(@event.GetType()),
JsonConvert.SerializeObject(@event, SerializerSettings)
));
await store.AppendToStream(entry.Stream, entry.ExpectedVersion, messages, ct);
}
}
}
));
}