public async IAsyncEnumerable <Event> ReadAllEventsFromStreamAsync(string stream)
{
using var store = await _streamStoreProvider.GetStreamStore();
var pos = 0;
var end = false;
var streamId = new StreamId(stream);
var page = await store.ReadStreamForwards(streamId.Id, 0, PAGE_SIZE);
if (page.Status == PageReadStatus.StreamNotFound)
{
throw new StreamNotFoundException(stream);
}
while (!end)
{
//process page results
var serializationTasks = new List <Task <Event> >(page.Messages.Length);
foreach (var message in page.Messages)
{
serializationTasks.Add(_eventSerializer.DeseralizeEvent(message));
}
await Task.WhenAll(serializationTasks);
foreach (var task in serializationTasks)
{
yield return(task.Result);
}
//Check next page
if (!page.IsEnd)
{
pos += PAGE_SIZE;
page = await store.ReadStreamForwards(streamId.Id, pos, PAGE_SIZE);
}
else
{
end = true;
}
}
yield break;
}
public async IAsyncEnumerable <Event> ReadAllEventsFromStreamAsync(string stream)
{
var credentials = await _connectionProvider.GetCredentials();
long position = 0;
var slice = default(StreamEventsSlice);
do
{
slice = await _conn.ReadStreamEventsForwardAsync(stream, position, 100, false, credentials);
switch (slice.Status)
{
case SliceReadStatus.StreamDeleted: throw new StreamDeletedException(stream);
case SliceReadStatus.StreamNotFound: throw new StreamNotFoundException(stream);
default: break;
}
foreach (var resolvedEvent in slice.Events)
{
if (resolvedEvent.OriginalStreamId[0] == '$')
{
continue;
}
var eventNumber = resolvedEvent.Event.EventNumber;
position = eventNumber;
var @event = _eventSerializer.DeseralizeEvent(resolvedEvent);
yield return(@event);
}
if (!slice.IsEndOfStream)
{
position += 1;
}
}while (!slice.IsEndOfStream);
yield break;
}
private async Task HandleEvent(StreamMessage message, CancellationToken cancellation)
{
Func <Event> lazyEvent =
new Func <Event>(() =>
{
var deserializationTask = _eventSerializer.DeseralizeEvent(message);
deserializationTask.Wait();
return(deserializationTask.Result);
});
var streamMessage = new SubscriptionMessage(message.MessageId, message.StreamId, message.Type, lazyEvent);
await RaiseMessage(streamMessage);
}
private async Task HandleEvent(ResolvedEvent resolvedEvent)
{
Func <Event> lazyEvent =
new Func <Event>(() =>
{
var @event = _eventSerializer.DeseralizeEvent(resolvedEvent);
@event.EventId = resolvedEvent.OriginalEvent.EventId;
return(@event);
});
var streamMessage = new SubscriptionMessage(
resolvedEvent.OriginalEvent.EventId,
resolvedEvent.Event.EventStreamId,
resolvedEvent.Event.EventType,
lazyEvent);
await RaiseMessage(streamMessage);
}
