public void Save(IEventProvider eventProvider)
{
if (!_isRunningWithinTransaction)
{
throw new Exception("Opperation is not running within a transaction");
}
var version = GetEventProviderVersion(eventProvider, _sqLiteTransaction);
if (version != eventProvider.Version)
{
throw new ConcurrencyViolationException();
}
foreach (var domainEvent in eventProvider.GetChanges())
{
SaveEvent(domainEvent, eventProvider, _sqLiteTransaction);
}
eventProvider.UpdateVersion(eventProvider.Version + eventProvider.GetChanges().Count());
UpdateEventProviderVersion(eventProvider, _sqLiteTransaction);
}
private static void UpdateAggregateVersion(IEventProvider eventProvider)
{
const string updateProviderVersion = @"UPDATE EventSource SET Version = @version WHERE Id = @id;";
eventProvider.UpdateVersion();
using (var connection = new MySqlConnection(connectionString)) {
using (var command = connection.CreateCommand()) {
command.CommandText = updateProviderVersion;
command.Parameters.Add("@id", MySqlDbType.Guid).Value = eventProvider.Id;
command.Parameters.Add("@version", MySqlDbType.Int64).Value = eventProvider.Version;
connection.Open();
command.ExecuteNonQuery();
}
}
}
