public Task TruncateStream(
StreamName stream,
StreamTruncatePosition truncatePosition,
ExpectedStreamVersion expectedVersion,
CancellationToken cancellationToken
)
{
var meta = new StreamMetadata(truncateBefore: truncatePosition.AsStreamPosition());
return(TryExecute(
() => AnyOrNot(
expectedVersion,
() => _client.SetStreamMetadataAsync(
stream,
StreamState.Any,
meta,
cancellationToken: cancellationToken
),
() => _client.SetStreamMetadataAsync(
stream,
expectedVersion.AsStreamRevision(),
meta,
cancellationToken: cancellationToken
)
),
stream,
() => new ErrorInfo(
"Unable to truncate stream {Stream} at {Position}",
stream,
truncatePosition
),
(s, ex) => new TruncateStreamException(s, ex)
));
}
public Task DeleteStream(
StreamName stream,
ExpectedStreamVersion expectedVersion,
CancellationToken cancellationToken
) => TryExecute(
() => AnyOrNot(
expectedVersion,
() => _client.DeleteAsync(
stream,
StreamState.Any,
cancellationToken: cancellationToken
),
() => _client.DeleteAsync(
stream,
expectedVersion.AsStreamRevision(),
cancellationToken: cancellationToken
)
),
stream,
() => new ErrorInfo("Unable to delete stream {Stream}", stream),
(s, ex) => new DeleteStreamException(s, ex)
);
public Task <AppendEventsResult> AppendEvents(
StreamName stream,
ExpectedStreamVersion expectedVersion,
IReadOnlyCollection <StreamEvent> events,
CancellationToken cancellationToken
)
{
var proposedEvents = events.Select(ToEventData);
var resultTask = expectedVersion == ExpectedStreamVersion.NoStream
? _client.AppendToStreamAsync(
stream,
StreamState.NoStream,
proposedEvents,
cancellationToken: cancellationToken
) : AnyOrNot(
expectedVersion,
() => _client.AppendToStreamAsync(
stream,
StreamState.Any,
proposedEvents,
cancellationToken: cancellationToken
),
() => _client.AppendToStreamAsync(
stream,
expectedVersion.AsStreamRevision(),
proposedEvents,
cancellationToken: cancellationToken
)
);
return(TryExecute(
async() => {
var result = await resultTask.NoContext();
return new AppendEventsResult(
result.LogPosition.CommitPosition,
result.NextExpectedStreamRevision.ToInt64()
);
},
stream,
() => new ErrorInfo("Unable to appends events to {Stream}", stream),
(s, ex) => {
EventuousEventSource.Log.UnableToAppendEvents(stream, ex);
return new AppendToStreamException(s, ex);
}
));
EventData ToEventData(StreamEvent streamEvent)
{
var(eventType, contentType, payload) = _serializer.SerializeEvent(streamEvent.Payload !);
return(new EventData(
Uuid.FromGuid(streamEvent.Id),
eventType,
payload,
_metaSerializer.Serialize(streamEvent.Metadata),
contentType
));
}
}