private TAggregateRoot Get(Guid id, int?version)
{
var aggregateId = EventStreamIdFormatter.GetStreamId <TAggregateRoot>(id.ToString());
var entityVersion = version ?? EntityVersion.Latest;
_logger.Debug(this, $"Loading stream {aggregateId}@{EntityVersion.GetName(entityVersion)}");
var stream = _eventStore.Load <TAggregateRoot>(aggregateId, entityVersion);
if (stream == null)
{
_logger.Warn(this, "No stream found for ID {0}", aggregateId);
return(null);
}
if (!stream.HasEvents)
{
_logger.Warn(this, "Stream for ID {0} has no events for version {1}", aggregateId, EntityVersion.GetName(entityVersion));
}
var aggregateRoot = new TAggregateRoot();
aggregateRoot.ApplyAll(stream.Events);
return(aggregateRoot);
}
private TAggregateRoot Get(Guid id, int?version)
{
var aggregateId = EventStreamIdFormatter.GetStreamId <TAggregateRoot>(id.ToString());
_logger.Debug(this, "Loading stream with ID {0} at version {1}", aggregateId, version);
var stream =
version == null
? _eventStore.Load <TAggregateRoot>(aggregateId)
: _eventStore.Load <TAggregateRoot>(aggregateId, version.Value);
if (stream == null)
{
_logger.Warn(this, "No stream found for ID {0}", aggregateId);
return(null);
}
if (!stream.HasEvents)
{
_logger.Warn(this, "Stream for ID {0} has no events for version {1}", aggregateId, version);
}
var aggregateRoot = new TAggregateRoot();
aggregateRoot.ApplyAll(stream.Events);
return(aggregateRoot);
}
public void Save(TAggregateRoot item)
{
var uncommittedEvents = item.GetUncommittedEvents().ToArray();
if (uncommittedEvents.Length == 0)
{
return;
}
var streamId = EventStreamIdFormatter.GetStreamId <TAggregateRoot>(item.Id.ToString());
try
{
_eventStore.Save <TAggregateRoot>(streamId, item.BaseVersion, uncommittedEvents);
}
catch (EventStoreConcurrencyException)
{
EventStream <TAggregateRoot> stream = _eventStore.Load <TAggregateRoot>(streamId);
if (stream != null)
{
IEvent[] baseAndUnseenEvents = stream.Events.ToArray();
if (baseAndUnseenEvents.Length > 0)
{
var unseenEvents = GetUnseenEvents(item, baseAndUnseenEvents);
var conflicts = _concurrencyMonitor.CheckForConflicts(unseenEvents, uncommittedEvents);
if (!conflicts.Any())
{
// Re-version our uncommitted events on top of those already saved to the db.
int unseenVersion = unseenEvents.Last().Version;
int newVersion = unseenVersion;
foreach (var evt in uncommittedEvents)
{
evt.Version = ++newVersion;
}
_eventStore.Save <TAggregateRoot>(streamId, unseenVersion, uncommittedEvents);
}
else
{
var exception = new ConcurrencyConflictsDetectedException(conflicts);
exception.Data.Add("AggregateId", item.Id);
throw exception;
}
}
}
}
item.AcceptUncommittedEvents();
}