IEnumerable<dynamic> GetEventsFrom(StreamEventsSlice slice)
{
foreach (var evnt in slice.Events)
{
var r = TryGetDomainEvent(evnt);
if (r != null)
yield return r;
}
}
public static StreamEventsSlice ToStreamEventsSlice(this ES.StreamEventsSlice slice)
{
return(new StreamEventsSlice(
slice.Stream,
slice.FromEventNumber,
slice.ReadDirection.ToReadDirection(),
slice.Events.ToRecordedEvents(),
slice.NextEventNumber,
slice.LastEventNumber,
slice.IsEndOfStream));
}
private async Task <bool> ReadEventsCallbackAsync(StreamEventsSlice slice, long?lastEventNumber)
{
bool shouldStopOrDone = ShouldStop || await ProcessEventsAsync(lastEventNumber, slice).ConfigureAwait(false);
if (shouldStopOrDone && Verbose)
{
Log.Debug(
"Catch-up Subscription {0} to {1}: finished reading events, nextReadEventNumber = {2}.",
SubscriptionName,
IsSubscribedToAll ? "<all>" : StreamId,
_nextReadEventNumber);
}
return(shouldStopOrDone);
}
private async Task <bool> ProcessEventsAsync(long?lastEventNumber, StreamEventsSlice slice)
{
bool done;
switch (slice.Status)
{
case SliceReadStatus.Success: {
foreach (var e in slice.Events)
{
await TryProcessAsync(e).ConfigureAwait(false);
}
_nextReadEventNumber = slice.NextEventNumber;
done = lastEventNumber == null ? slice.IsEndOfStream : slice.NextEventNumber > lastEventNumber;
break;
}
case SliceReadStatus.StreamNotFound: {
if (lastEventNumber.HasValue && lastEventNumber != -1)
{
throw new Exception(
string.Format(
"Impossible: stream {0} disappeared in the middle of catching up subscription {1}.",
StreamId, SubscriptionName));
}
done = true;
break;
}
case SliceReadStatus.StreamDeleted:
throw new StreamDeletedException(StreamId);
default:
throw new ArgumentOutOfRangeException(string.Format(
"Subscription {0} unexpected StreamEventsSlice.Status: {1}.",
SubscriptionName, slice.Status));
}
if (!done && slice.IsEndOfStream)
{
await Task.Delay(1).ConfigureAwait(false); // we are awaiting the server to flush its data
}
return(done);
}
private bool ProcessEvents(int?lastEventNumber, StreamEventsSlice slice)
{
bool done;
switch (slice.Status)
{
case SliceReadStatus.Success:
{
foreach (var e in slice.Events)
{
TryProcess(e);
}
_nextReadEventNumber = slice.NextEventNumber;
done = lastEventNumber == null ? slice.IsEndOfStream : slice.NextEventNumber > lastEventNumber;
break;
}
case SliceReadStatus.StreamNotFound:
{
if (lastEventNumber.HasValue && lastEventNumber != -1)
{
throw new Exception(
string.Format("Impossible: stream {0} disappeared in the middle of catching up subscription.",
StreamId));
}
done = true;
break;
}
case SliceReadStatus.StreamDeleted:
throw new StreamDeletedException(StreamId);
default:
throw new ArgumentOutOfRangeException(string.Format("Unexpected StreamEventsSlice.Status: {0}.",
slice.Status));
}
if (!done && slice.IsEndOfStream)
{
Thread.Sleep(1); // we are waiting for server to flush its data
}
return(done);
}
private bool ProcessEvents(int? lastEventNumber, StreamEventsSlice slice)
{
bool done;
switch (slice.Status)
{
case SliceReadStatus.Success:
{
foreach (var e in slice.Events)
{
TryProcess(e);
}
_nextReadEventNumber = slice.NextEventNumber;
done = lastEventNumber == null ? slice.IsEndOfStream : slice.NextEventNumber > lastEventNumber;
break;
}
case SliceReadStatus.StreamNotFound:
{
if (lastEventNumber.HasValue && lastEventNumber != -1)
throw new Exception(
string.Format("Impossible: stream {0} disappeared in the middle of catching up subscription.",
StreamId));
done = true;
break;
}
case SliceReadStatus.StreamDeleted:
throw new StreamDeletedException(StreamId);
default:
throw new ArgumentOutOfRangeException(string.Format("Unexpected StreamEventsSlice.Status: {0}.",
slice.Status));
}
if (!done && slice.IsEndOfStream)
Thread.Sleep(1); // we are waiting for server to flush its data
return done;
}
protected override void When()
{
_read = _conn.ReadStreamEventsForwardAsync(LinkedStreamName, 0, 1, true, null).Result;
}
