private async Task SaveMemento(
Guid sourceId,
IMemento memento,
CancellationToken cancellationToken)
{
using (IMementoStoreDbContext context = _dbContextFactory.Invoke())
{
Memento entity = await context
.Mementoes
.Where(m => m.AggregateId == sourceId)
.SingleOrDefaultAsync(cancellationToken)
.ConfigureAwait(false);
if (entity == null)
{
entity = new Memento {
AggregateId = sourceId
};
context.Mementoes.Add(entity);
}
entity.MementoJson = _serializer.Serialize(memento);
await context.SaveChangesAsync(cancellationToken).ConfigureAwait(false);
}
}
private async Task <IMemento> FindMemento(
Guid sourceId,
CancellationToken cancellationToken)
{
using (IMementoStoreDbContext context = _dbContextFactory.Invoke())
{
Memento entity = await context
.Mementoes
.Where(m => m.AggregateId == sourceId)
.SingleOrDefaultAsync(cancellationToken)
.ConfigureAwait(false);
if (entity == null)
{
return(null);
}
object memento = _serializer.Deserialize(entity.MementoJson);
return((IMemento)memento);
}
}
private async Task DeleteMemento(
Guid sourceId,
CancellationToken cancellationToken)
{
using (IMementoStoreDbContext context = _dbContextFactory.Invoke())
{
Memento entity = await context
.Mementoes
.Where(m => m.AggregateId == sourceId)
.SingleOrDefaultAsync()
.ConfigureAwait(false);
if (entity == null)
{
return;
}
context.Mementoes.Remove(entity);
await context.SaveChangesAsync(cancellationToken).ConfigureAwait(false);
}
}
