/// <summary>
/// Commits pending transactions.
/// </summary>
/// <returns>A <see cref="Task"/>.</returns>
public async Task Commit()
{
while (_pendingTransactions.Any())
{
using IWrappedTransaction transaction = _pendingTransactions.Dequeue();
await transaction.CommitAsync().ConfigureAwait(false);
}
}
/// <summary>
/// Rolls back pending transactions.
/// </summary>
/// <returns>A <see cref="Task"/>.</returns>
public Task Rollback()
{
while (_pendingTransactions.Any())
{
using IWrappedTransaction transaction = _pendingTransactions.Dequeue();
transaction.Rollback();
}
return(Task.CompletedTask);
}
/// <summary>
/// Stores one or more events for a given aggregate root.
/// </summary>
/// <param name="identifier">The aggregate root identifier.</param>
/// <param name="expectedVersion">The expected version of the event stream of the aggregate root.</param>
/// <param name="events">The events to store.</param>
/// <param name="cancellationToken">A <see cref="CancellationToken"/>.</param>
/// <returns>A <see cref="Task"/>.</returns>
public async Task StoreEvents(TIdentifier identifier, long expectedVersion, IEnumerable <TEventBase> events, CancellationToken cancellationToken = default)
{
cancellationToken.ThrowIfCancellationRequested();
IWrappedTransaction transaction = await _createTransaction(_connection, identifier.ToString(), expectedVersion - 1).ConfigureAwait(false);
_pendingTransactions.Enqueue(transaction);
EventData[] eventData = events
.Select(@event => new EventData(
eventId: Guid.NewGuid(),
type: @event.GetType().FullName,
isJson: true,
data: Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(@event, typeof(object), _jsonSerializerSettings)),
metadata: Array.Empty <byte>()))
.ToArray();
cancellationToken.ThrowIfCancellationRequested();
await transaction.WriteAsync(eventData).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
}
