private async Task ManageSnapshotBehavior(
IDomainEvent @event,
EventStoreDbContext ctx,
int hashedAggregateId)
{
bool IsSnaphostEnabled()
{
return(_snapshotBehaviorProvider != null &&
_archiveBehavior != SnapshotEventsArchiveBehavior.Disabled);
}
if (@event.AggregateId != null && @event.AggregateType != null)
{
var evtType = @event.GetType();
if (IsSnaphostEnabled())
{
var behavior = _snapshotBehaviorProvider !.GetBehaviorForEventType(evtType);
if (behavior?.IsSnapshotNeeded(@event) == true)
{
var aggState = await GetRehydratedAggregateStateAsync(@event.AggregateId, @event.AggregateType, ctx)
.ConfigureAwait(false);
var eventsToArchive = behavior.GenerateSnapshot(aggState);
if (eventsToArchive?.Any() == true)
{
if (aggState != null)
{
var previousSnapshot = await ctx
.Set <Snapshot>()
.FirstOrDefaultAsync(s =>
s.HashedAggregateId == hashedAggregateId &&
s.AggregateType == @event.AggregateType.AssemblyQualifiedName)
.ConfigureAwait(false);
if (previousSnapshot != null)
{
ctx.Remove(previousSnapshot);
}
ctx.Add(new Snapshot
{
AggregateType = @event.AggregateType.AssemblyQualifiedName,
HashedAggregateId = hashedAggregateId,
SnapshotBehaviorType = behavior.GetType().AssemblyQualifiedName,
SnapshotTime = DateTime.Now,
SnapshotData = aggState.ToJson(new AggregateStateSerialisationContract())
});
}
await StoreArchiveEventsAsync(eventsToArchive, ctx).ConfigureAwait(false);
}
}
}
}
}
protected override void Dispose(bool disposing)
{
var options = new DbContextOptionsBuilder()
.UseSqlServer(_configuration[DataDefaultConnectionString])
.Options;
var context = new EventStoreDbContext(options);
foreach (var storedEvent in context.StoredEvents.Where(x => x.CorrelationId == _correlationId))
{
context.Remove(storedEvent);
}
context.SaveChanges();
base.Dispose(disposing);
}