public static List <UnpersistedRawEvent> FromUnpersistedEvents(IEnumerable <UnpersistedEvent> events, ISerializer serializer)
{
Argument.Requires(events != null);
Argument.Requires(serializer != null);
return(events.Select(e =>
{
var format = EvenStorageFormatAttribute.GetStorageFormat(e.DomainEvent.GetType());
var metadata = serializer.SerializeMetadata(e.Metadata);
var payload = serializer.SerializeEvent(e.DomainEvent, format);
var re = new UnpersistedRawEvent(e.EventID, e.Stream, e.EventType, e.UtcTimestamp, metadata, payload, format);
return re;
}).ToList());
}
public static List<UnpersistedRawEvent> FromUnpersistedEvents(IEnumerable<UnpersistedEvent> events, ISerializer serializer)
{
Argument.Requires(events != null);
Argument.Requires(serializer != null);
return events.Select(e =>
{
var format = EvenStorageFormatAttribute.GetStorageFormat(e.DomainEvent.GetType());
var metadata = serializer.SerializeMetadata(e.Metadata);
var payload = serializer.SerializeEvent(e.DomainEvent, format);
var re = new UnpersistedRawEvent(e.EventID, e.Stream, e.EventType, e.UtcTimestamp, metadata, payload, format);
return re;
}).ToList();
}
protected async Task WriteEvents(PersistenceRequest request)
{
var events = request.Events;
// serialize the events into raw events
var rawEvents = UnpersistedRawEvent.FromUnpersistedEvents(events, _serializer);
// writes all events to the store
await _writer.WriteStreamAsync(request.Stream, request.ExpectedStreamSequence, rawEvents);
// publishes the events in the order they were sent
for (int i = 0, len = events.Count; i < len; i++)
{
var e = events[i];
var re = rawEvents[i];
var persistedEvent = PersistedEventFactory.FromUnpersistedEvent(re.GlobalSequence, e);
// publish to the event stream
_dispatcher.Tell(persistedEvent);
}
}
async Task Write(IReadOnlyList <BufferEntry> bufferEntries)
{
// creates a list of "Event + Sender" entries
var entries = bufferEntries.SelectMany(entry => entry.Request.Events.Select(@event => new { Event = @event, Sender = entry.Sender })).ToList();
// serialize the events into raw events
var rawEvents = UnpersistedRawEvent.FromUnpersistedEvents(entries.Select(e => e.Event), _serializer);
// writes to the store
await _writer.WriteAsync(rawEvents);
// sends the events to the dispatcher
for (int i = 0, len = entries.Count; i < len; i++)
{
var sender = entries[i].Sender;
var e = entries[i].Event;
var re = rawEvents[i];
var persistedEvent = PersistedEventFactory.FromUnpersistedEvent(re.GlobalSequence, e);
_dispatcher.Tell(persistedEvent);
}
}
