/// <summary>
/// Saves changes to the respective stream
/// NOTES: Current implementation doesn't support cancellation token
/// </summary>
/// <param name="eventsToAdd"></param>
/// <param name="snapshot"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
protected override async Task <int> SaveChanges(ItemWithType[] eventsToAdd,
TState snapshot,
CancellationToken?cancellationToken)
{
checked
{
CheckDisposedState();
ConditionalWriteResult writeResult;
writeResult = await eventStoreConnection.ConditionalAppendToStreamAsync(
streamName,
this.ConcurrencyId,
eventsToAdd.Select(eventObject => eventObject.CreateEventData()))
.ConfigureAwait(false);
StreamAppendHelpers.CheckConditionalWriteResultStatus(writeResult, streamName);
if (!writeResult.NextExpectedVersion.HasValue)
{
throw new InvalidOperationException("Eventstore data write outcome unexpected. NextExpectedVersion is null");
}
await Initialize();
ConsiderSessionDisposed();
return((int)writeResult.NextExpectedVersion.Value);
}
}
public async Task <bool> ApplyUpdatesToStorage(IReadOnlyList <Event> updates, int expectedversion)
{
expectedversion = expectedversion - 1;
var eventData = updates.Select(ToEventData).ToArray();
var result = await _connection.ConditionalAppendToStreamAsync(_stream, expectedversion, eventData);
return(result.Status != ConditionalWriteStatus.VersionMismatch);
}
private async Task SoftDeleteByEventImpl(TId selector, EventData softDeleteEvent)
{
var id = selector.ToString();
var expectedVersion = await GetLastEventNumber(id);
var writeResult = await connection.ConditionalAppendToStreamAsync(
id,
expectedVersion,
new[] { softDeleteEvent })
.ConfigureAwait(false);
StreamAppendHelpers.CheckConditionalWriteResultStatus(writeResult, id);
}
public Task Append(Guid aggregateId, long expectedAggregateVersion, IEnumerable <IPendingEvent> pendingEvents)
{
if (!pendingEvents.Any())
{
return(Task.CompletedTask);
}
var aggregateType = pendingEvents.First().AggregateType;
var eventDataList = new List <EventData>();
foreach (var @event in pendingEvents)
{
eventDataList.Add(new EventData(Guid.NewGuid(), @event.EventType, true, Encoding.UTF8.GetBytes(_serializer.Serialize(@event.Data)), Encoding.UTF8.GetBytes(_serializer.Serialize(@event.Metadata))));
}
return(_connection.ConditionalAppendToStreamAsync(aggregateType + "-" + aggregateId, expectedAggregateVersion - 1, eventDataList));
}
/// <summary>
/// Saves changes to the respective stream
/// NOTES: Current implementation doesn't support cancellation token
/// </summary>
/// <param name="eventsToAdd"></param>
/// <param name="snapshot"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
protected override async Task <int> SaveChanges(ItemWithType[] eventsToAdd,
TState snapshot,
CancellationToken?cancellationToken)
{
checked
{
CheckDisposedState();
ConditionalWriteResult writeResult;
writeResult = await eventStoreConnection.ConditionalAppendToStreamAsync(
streamName,
currentVersion,
eventsToAdd.Select(eventObject => CreateEventData(eventObject)))
.ConfigureAwait(false);
switch (writeResult.Status)
{
case ConditionalWriteStatus.Succeeded:
break;
case ConditionalWriteStatus.VersionMismatch:
throw new ConcurrencyException(streamName, null);
case ConditionalWriteStatus.StreamDeleted:
throw new InvalidOperationException($"Stream was deleted. StreamId: {streamName}");
default:
throw new InvalidOperationException($"Unexpected write result: {writeResult.Status}");
}
if (!writeResult.NextExpectedVersion.HasValue)
{
throw new InvalidOperationException("Eventstore data write outcome unexpected. NextExpectedVersion is null");
}
ConsiderSessionDisposed();
currentVersion = (int)writeResult.NextExpectedVersion.Value;
return((int)writeResult.NextExpectedVersion.Value);
}
}
