private StreamMetadata GetStreamMetadataUncached(TFReaderLease reader, string streamId)
{
var metastreamId = SystemStreams.MetastreamOf(streamId);
var metaEventNumber = GetStreamLastEventNumberCached(reader, metastreamId);
if (metaEventNumber == ExpectedVersion.NoStream || metaEventNumber == EventNumber.DeletedStream)
{
return(StreamMetadata.Empty);
}
PrepareLogRecord prepare = ReadPrepareInternal(reader, metastreamId, metaEventNumber);
if (prepare == null)
{
throw new Exception(string.Format("ReadPrepareInternal couldn't find metaevent #{0} on metastream '{1}'. "
+ "That should never happen.", metaEventNumber, metastreamId));
}
if (prepare.Data.Length == 0 || prepare.Flags.HasNoneOf(PrepareFlags.IsJson))
{
return(StreamMetadata.Empty);
}
try
{
return(StreamMetadata.FromJsonBytes(prepare.Data));
}
catch (Exception)
{
return(StreamMetadata.Empty);
}
}
public StreamMetadata GetStreamMetadata(string streamId)
{
StreamMeta meta;
if (_streamRawMetas.TryGet(streamId, out meta))
{
if (meta.Meta != null)
{
return(meta.Meta);
}
var m = Helper.EatException(() => StreamMetadata.FromJsonBytes(meta.RawMeta), StreamMetadata.Empty);
_streamRawMetas.Put(streamId, new StreamMeta(meta.RawMeta, m), 0);
return(m);
}
return(_indexReader.GetStreamMetadata(streamId));
}
private StreamMetadata GetStreamMetadataUncached(TFReaderLease reader, string streamId)
{
var metastreamId = SystemStreams.MetastreamOf(streamId);
var metaEventNumber = GetStreamLastEventNumberCached(reader, metastreamId);
if (metaEventNumber == ExpectedVersion.NoStream || metaEventNumber == EventNumber.DeletedStream)
{
return(StreamMetadata.Empty);
}
PrepareLogRecord prepare = ReadPrepareInternal(reader, metastreamId, metaEventNumber);
if (prepare == null)
{
throw new Exception(string.Format("ReadPrepareInternal could not find metaevent #{0} on metastream '{1}'. "
+ "That should never happen.", metaEventNumber, metastreamId));
}
if (prepare.Data.Length == 0 || prepare.Flags.HasNoneOf(PrepareFlags.IsJson))
{
return(StreamMetadata.Empty);
}
try
{
var metadata = StreamMetadata.FromJsonBytes(prepare.Data);
if (prepare.Version == LogRecordVersion.LogRecordV0 && metadata.TruncateBefore == int.MaxValue)
{
metadata = new StreamMetadata(metadata.MaxCount, metadata.MaxAge, EventNumber.DeletedStream,
metadata.TempStream, metadata.CacheControl, metadata.Acl);
}
return(metadata);
}
catch (Exception)
{
return(StreamMetadata.Empty);
}
}
