private int GetEventSourceVersion(AlternativeDomain.EventSource eventSource)
{
if (eventSource == null)
{
return(0);
}
return(eventSource.Version);
}
public void SaveEventsNotAtomically(Guid aggregateId, int expectedVersion, List <Event> events)
{
var eventSources = _database.GetCollection <AlternativeDomain.EventSource>("EventSource2");
var eventSource = eventSources.FindSync(x => x.AggregateId == aggregateId).FirstOrDefault();
bool existedAggregate = true;
if (eventSource == null)
{
existedAggregate = false;
eventSource = new AlternativeDomain.EventSource
{
AggregateId = aggregateId,
Version = 0
};
}
var currentVersion = GetEventSourceVersion(eventSource);
if (expectedVersion != currentVersion)
{
throw new Exception("Concurrency problem");
}
foreach (var e in events)
{
e.Version = ++currentVersion;
}
eventSource.Version += events.Count;
if (existedAggregate)
{
eventSources.UpdateOne(x => x.AggregateId == aggregateId,
new UpdateDefinitionBuilder <AlternativeDomain.EventSource>()
.Set(x => x.Version, eventSource.Version));
}
else
{
eventSources.InsertOne(eventSource);
}
var eventsCollection = _database.GetCollection <AlternativeDomain.Event>("Event");
eventsCollection.InsertMany(events.Select(x => new AlternativeDomain.Event
{
AggregateId = aggregateId,
Version = x.Version,
Data = x.Data,
Date = x.Date
}));
}
