private ClientMessage.ReadAllEventsForwardCompleted ReadAllEventsForward(ClientMessage.ReadAllEventsForward msg)
{
using (HistogramService.Measure(_readerAllRangeHistogram))
{
var pos = new TFPos(msg.CommitPosition, msg.PreparePosition);
var lastCommitPosition = _readIndex.LastReplicatedPosition;
try
{
if (msg.MaxCount > MaxPageSize)
{
throw new ArgumentException(string.Format("Read size too big, should be less than {0} items",
MaxPageSize));
}
if (pos == TFPos.HeadOfTf)
{
var checkpoint = _writerCheckpoint.Read();
pos = new TFPos(checkpoint, checkpoint);
}
if (pos.CommitPosition < 0 || pos.PreparePosition < 0)
{
return(NoData(msg, ReadAllResult.Error, pos, lastCommitPosition, "Invalid position."));
}
if (msg.ValidationTfLastCommitPosition == lastCommitPosition)
{
return(NoData(msg, ReadAllResult.NotModified, pos, lastCommitPosition));
}
var access = _readIndex.CheckStreamAccess(SystemStreams.AllStream, StreamAccessType.Read, msg.User);
if (!access.Granted)
{
return(NoData(msg, ReadAllResult.AccessDenied, pos, lastCommitPosition));
}
var res = _readIndex.ReadAllEventsForward(pos, msg.MaxCount);
var resolved = ResolveReadAllResult(res.Records, msg.ResolveLinkTos, msg.User);
if (resolved == null)
{
return(NoData(msg, ReadAllResult.AccessDenied, pos, lastCommitPosition));
}
var metadata = _readIndex.GetStreamMetadata(SystemStreams.AllStream);
return(new ClientMessage.ReadAllEventsForwardCompleted(
msg.CorrelationId, ReadAllResult.Success, null, resolved, metadata, access.Public, msg.MaxCount,
res.CurrentPos, res.NextPos, res.PrevPos, lastCommitPosition));
}
catch (Exception exc)
{
Log.ErrorException(exc, "Error during processing ReadAllEventsForward request.");
return(NoData(msg, ReadAllResult.Error, pos, lastCommitPosition, exc.Message));
}
}
}
public StreamMetadata GetStreamMetadata(TStreamId streamId) => _readIndex.GetStreamMetadata(streamId);
public static StreamMetadata GetStreamMetadata <TStreamId>(this IReadIndex <TStreamId> self, string streamName)
{
var streamId = self.GetStreamId(streamName);
return(self.GetStreamMetadata(streamId));
}
