internal async Task ProcessEventsAsync(DocumentSessionBase session, CancellationToken token)
{
if (!session._workTracker.Streams.Any())
{
return;
}
if (Options.AutoCreateSchemaObjects != AutoCreate.None)
{
await session.Database.EnsureStorageExistsAsync(typeof(IEvent), token).ConfigureAwait(false);
}
var fetcher = new EventSequenceFetcher(this, session.WorkTracker.Streams.Sum(x => x.Events.Count));
var sequences = await session.ExecuteHandlerAsync(fetcher, token).ConfigureAwait(false);
var storage = session.EventStorage();
foreach (var stream in session.WorkTracker.Streams.Where(x => x.Events.Any()))
{
stream.TenantId ??= session.TenantId;
if (stream.ActionType == StreamActionType.Start)
{
stream.PrepareEvents(0, this, sequences, session);
session.QueueOperation(storage.InsertStream(stream));
}
else
{
var handler = storage.QueryForStream(stream);
var state = await session.ExecuteHandlerAsync(handler, token).ConfigureAwait(false);
if (state == null)
{
stream.PrepareEvents(0, this, sequences, session);
session.QueueOperation(storage.InsertStream(stream));
}
else
{
if (state.IsArchived)
{
throw new InvalidStreamOperationException($"Attempted to append event to archived stream with Id '{state.Id}'.");
}
stream.PrepareEvents(state.Version, this, sequences, session);
session.QueueOperation(storage.UpdateStreamVersion(stream));
}
}
foreach (var @event in stream.Events)
{
session.QueueOperation(storage.AppendEvent(this, session, stream, @event));
}
}
foreach (var projection in _inlineProjections.Value)
{
await projection.ApplyAsync(session, session.WorkTracker.Streams.ToList(), token).ConfigureAwait(false);
}
}
public Task <IReadOnlyList <IEvent> > FetchStreamAsync(Guid streamId, long version = 0, DateTime?timestamp = null, CancellationToken token = default(CancellationToken))
{
var selector = _store.Events.EnsureAsGuidStorage(_session);
var statement = new EventStatement(selector)
{
StreamId = streamId, Version = version, Timestamp = timestamp, TenantId = _tenant.TenantId
};
IQueryHandler <IReadOnlyList <IEvent> > handler = new ListQueryHandler <IEvent>(statement, selector);
return(_session.ExecuteHandlerAsync(handler, token));
}
internal async Task ProcessEventsAsync(DocumentSessionBase session, CancellationToken token)
{
if (!session._workTracker.Streams.Any())
{
return;
}
// TODO -- we'll optimize this later to batch up queries to the database
var fetcher = new EventSequenceFetcher(this, session.WorkTracker.Streams.Sum(x => x.Events.Count));
var sequences = await session.ExecuteHandlerAsync(fetcher, token);
var storage = session.EventStorage();
foreach (var stream in session.WorkTracker.Streams)
{
stream.TenantId ??= session.Tenant.TenantId;
if (stream.ActionType == StreamActionType.Start)
{
stream.PrepareEvents(0, this, sequences, session);
session.QueueOperation(storage.InsertStream(stream));
}
else
{
var handler = storage.QueryForStream(stream);
var state = await session.ExecuteHandlerAsync(handler, token);
if (state == null)
{
stream.PrepareEvents(0, this, sequences, session);
session.QueueOperation(storage.InsertStream(stream));
}
else
{
stream.PrepareEvents(state.Version, this, sequences, session);
session.QueueOperation(storage.UpdateStreamVersion(stream));
}
}
foreach (var @event in stream.Events)
{
session.QueueOperation(storage.AppendEvent(this, session, stream, @event));
}
}
foreach (var projection in _inlineProjections.Value)
{
await projection.ApplyAsync(session, session.WorkTracker.Streams.ToList(), token);
}
}
public Task <IReadOnlyList <IEvent> > FetchStreamAsync(Guid streamId, int version = 0, DateTime?timestamp = null, CancellationToken token = default(CancellationToken))
{
var selector = _store.Events.EnsureAsGuidStorage(_session);
var handler = new EventQueryHandler <Guid>(selector, streamId, version, timestamp, _store.Events.TenancyStyle, _tenant.TenantId);
return(_session.ExecuteHandlerAsync(handler, token));
}
