public override IEnumerable <IEvent <TAuthenticationToken> > Get(Type aggregateRootType, Guid aggregateId, bool useLastEventOnly = false, int fromVersion = -1)
{
string streamName = string.Format(CqrsEventStoreStreamNamePattern, aggregateRootType.FullName, aggregateId);
if (!EventStoreByType.Contains(streamName))
{
Logger.LogDebug(string.Format("The event store has no items '{0}'.", streamName));
return(Enumerable.Empty <IEvent <TAuthenticationToken> >());
}
CacheItem item = EventStoreByType.GetCacheItem(streamName);
if (item == null)
{
Logger.LogDebug(string.Format("The event store had an item '{0}' but doesn't now.", streamName));
return(Enumerable.Empty <IEvent <TAuthenticationToken> >());
}
var events = item.Value as IEnumerable <EventData>;
if (events == null)
{
if (item.Value == null)
{
Logger.LogDebug(string.Format("The event store had an item '{0}' but it was null.", streamName));
}
else
{
Logger.LogWarning(string.Format("The event store had an item '{0}' but it was of type {1}.", streamName, item.Value.GetType()));
}
return(Enumerable.Empty <IEvent <TAuthenticationToken> >());
}
IEnumerable <EventData> query = events
.Where(eventData => eventData.Version > fromVersion)
.OrderByDescending(eventData => eventData.Version);
if (useLastEventOnly)
{
query = query.AsQueryable().Take(1);
}
return(query
.Select(EventDeserialiser.Deserialise)
.ToList());
}
protected override void PersistEvent(EventData eventData)
{
IList <EventData> events = new List <EventData>();
// By correlationId first
Guid correlationId = eventData.CorrelationId;
object item = EventStoreByCorrelationId.AddOrGetExisting(correlationId.ToString("N"), events, GetDetaultCacheItemPolicy());
if (item != null)
{
events = item as IList <EventData>;
if (events == null)
{
Logger.LogWarning(string.Format("The event store had some items by the correlationId '{0:N}' but it doesn't now.", correlationId));
throw new Exception(string.Format("The event store had some items by the correlationId '{0:N}' but it doesn't now.", correlationId));
}
}
events.Add(eventData);
// Reset the variable for it's next usage
events = new List <EventData>();
// By type next
string streamName = eventData.AggregateId;
item = EventStoreByType.AddOrGetExisting(streamName, events, GetDetaultCacheItemPolicy());
if (item != null)
{
events = item as IList <EventData>;
if (events == null)
{
Logger.LogWarning(string.Format("The event store had an item by id '{0}' but it doesn't now.", streamName));
throw new Exception(string.Format("The event store had an item by id '{0}' but it doesn't now.", streamName));
}
}
events.Add(eventData);
}
