private async Task UpdatePosition(Position newPosition)
{
using var scope = _serviceProvider.CreateScope();
await using var dbContext = scope.ServiceProvider.GetRequiredService <GameSociationContext>();
var currentPosition = await dbContext.Set <Position>().AsNoTracking().SingleOrDefaultAsync(p => p.Type == PositionType.DomainEvent);
if (currentPosition == null)
{
await dbContext.AddAsync(newPosition);
}
else
{
currentPosition.Commit = newPosition.Commit;
currentPosition.Prepare = newPosition.Prepare;
}
await dbContext.SaveChangesAsync();
}
private async Task HandleEvent(StreamSubscription subscription, ResolvedEvent resolvedEvent, CancellationToken cancellationToken)
{
if (!resolvedEvent.OriginalPosition.HasValue)
{
return;
}
var domainEvent = resolvedEvent.ToTypedEvent();
await ProjectionNormalizer.ApplyEvent(domainEvent);
var newPosition = new Position
{
Commit = resolvedEvent.OriginalPosition.Value.CommitPosition,
Prepare = resolvedEvent.OriginalPosition.Value.PreparePosition,
Type = PositionType.ReadModel
};
await UpdatePosition(newPosition);
}
private async Task HandleEvent(StreamSubscription subscription, ResolvedEvent resolvedEvent, CancellationToken cancellationToken)
{
if (!resolvedEvent.OriginalPosition.HasValue)
{
return;
}
var domainEvent = resolvedEvent.ToTypedEvent();
using var scope = _serviceProvider.CreateScope();
var eventBus = scope.ServiceProvider.GetRequiredService <IEventBus>();
await eventBus.Publish((IDomainEvent)domainEvent);
var newPosition = new Position
{
Commit = resolvedEvent.OriginalPosition.Value.CommitPosition,
Prepare = resolvedEvent.OriginalPosition.Value.PreparePosition,
Type = PositionType.DomainEvent
};
await UpdatePosition(newPosition);
}
protected abstract Task UpdatePosition(Position newPosition);