public async Task Save(
Foo streamDocument,
CancellationToken cancellationToken = default(CancellationToken))
{
var state = streamDocument.GetState();
var json = JsonConvert.SerializeObject(state, _serializerSettings);
var newStreamMessage = new NewStreamMessage(Guid.NewGuid(), "FooDocState", json);
var originalVersion = streamDocument.OriginalVersion;
if (originalVersion < 0)
{
await _streamStore.AppendToStream(
streamDocument.Id,
ExpectedVersion.NoStream,
newStreamMessage,
cancellationToken);
await _streamStore.SetStreamMetadata(
streamDocument.Id,
maxCount : _maxCount,
cancellationToken : cancellationToken);
}
else
{
await _streamStore.AppendToStream(
streamDocument.Id,
originalVersion,
newStreamMessage,
cancellationToken);
}
}
private async Task <FastForwardResult> FastForward(IStreamStore from, IStreamStore to, string branchId)
{
var fastForwardResult = new FastForwardResult();
var page = await from.ListStreams();
while (page.StreamIds.Length > 0)
{
foreach (var s in page.StreamIds.Where(x => x.StartsWith(branchId)))
{
var localPosition = await from.LastPosition(s);
var remotePosition = await to.LastPosition(s);
if (localPosition == remotePosition)
{
continue;
}
var eventPage = await from.ReadStreamForwards(s, Math.Max(remotePosition + 1, 0), Configuration.BatchSize);
var appendMessages = new List <NewStreamMessage>();
if (eventPage.Messages.Length == 0 && localPosition >= ExpectedVersion.EmptyStream)
{
await to.AppendToStream(s, remotePosition, appendMessages.ToArray());
}
var metadata = await from.GetStreamMetadata(s);
await to.SetStreamMetadata(s, ExpectedVersion.Any, metadata.MaxAge, metadata.MaxCount, metadata.MetadataJson);
while (eventPage.Messages.Length > 0)
{
appendMessages.Clear();
foreach (var m in eventPage.Messages)
{
var payload = await m.GetJsonData();
var message = new NewStreamMessage(m.MessageId, m.Type, payload, m.JsonMetadata);
appendMessages.Add(message);
}
var result = await to.AppendToStream(s, remotePosition, appendMessages.ToArray());
fastForwardResult.NumberOfMessages += result.CurrentVersion - Math.Max(remotePosition, ExpectedVersion.EmptyStream);
eventPage = await eventPage.ReadNext();
}
fastForwardResult.NumberOfStreams++;
}
page = await page.Next();
}
fastForwardResult.ResultStatus = Status.Success;
return(fastForwardResult);
}
public async Task <Unit> Invoke(IStreamStore streamStore, CancellationToken ct)
{
await streamStore.SetStreamMetadata(
StreamId,
ExpectedVersion,
MaxAge,
MaxCount,
MetadataJson,
ct);
return(Unit.Instance);
}
public async Task <WebHooks> Load(CancellationToken cancellationToken)
{
var page = await _streamStore.ReadStreamBackwards(_name, StreamVersion.End, 1, cancellationToken);
if (page.Status == PageReadStatus.StreamNotFound)
{
await _streamStore.SetStreamMetadata(_name, maxCount : 1, cancellationToken : cancellationToken);
return(new WebHooks(_getUtcNow, _maxWebHookCount));
}
var json = await page.Messages[0].GetJsonData(cancellationToken);
var memento = JsonConvert.DeserializeObject <WebHooksMemento>(json);
return(new WebHooks(memento, _getUtcNow, _maxWebHookCount));
}
private static void Write(IStreamStore streamStore, int messageCount, int streamCount)
{
var streams = Enumerable.Range(0, streamCount).Select(_ => $"test-{Guid.NewGuid():n}").ToList();
IList <Func <Task> > tasks = new List <Func <Task> >();;
for (int i = 0; i < streams.Count; i++)
{
var streamId = streams[i];
var messages = GenerateMessages(messageCount);
foreach (var message in messages)
{
tasks.Add(() => streamStore.AppendToStream(streamId, ExpectedVersion.Any, new[] { message }));
}
var oneMonthInSeconds = 2629743;
tasks.Add(() => streamStore.SetStreamMetadata(streamId, ExpectedVersion.Any, oneMonthInSeconds, 100, $@"{{ ""foo"": ""baz"" }}"));
}
tasks.Shuffle();
Task.Run(() => Task.WhenAll(tasks.Select(t => t())));
}