internal async ValueTask <bool> CreateStreamAsync <T>(DataPath dataPath,
Metadata metadata, DataStreamCreateFlags flags)
{
var slf = (StreamLogFlags)flags;
short fixedSize = 0;
if (slf.IsBinary() && TypeEnumHelper <T> .FixedSize > 0)
{
if (slf.NoTimestamp())
{
fixedSize = TypeEnumHelper <T> .FixedSize;
}
else
{
fixedSize = checked ((short)(Timestamp.Size + TypeEnumHelper <T> .FixedSize));
}
}
// TODO this is only first take to move further and start writing stuff,
// needs review and proper ContainerSchema generation from types T.
// Also there are so many different flags that they need review.
var schema = new ContainerSchema()
{
ContainerType = (byte)ContainerLayout.None,
ContainerFlags = (byte)slf,
ValuesSchema = new TypeSchema()
{
DataTypeHeader = TypeEnumHelper <T> .DataTypeHeader,
TypeName = typeof(T).Name,
TypeFullName = typeof(T).FullName,
FixedSize = fixedSize,
}
};
var mdr = await MetadataManager.CreateStreamAsync(dataPath, metadata, schema).ConfigureAwait(false);
if (mdr.PK != null)
{
var containerId = mdr.ContainerId;
var streamId = StreamLogId.ContainerIdToStreamId(containerId);
var slid = new StreamLogId(mdr.RepoId, streamId);
var state = StreamLogManager.StateStorage.GetState(slid);
var lockHolder = state.LockHolder;
state.CheckInit(slid, fixedSize, slf);
return(true);
}
mdr = await MetadataManager.GetMetadataRecordByPathAsync(dataPath).ConfigureAwait(false);
if (mdr.PK != null)
{
return(false);
}
throw new ArgumentException($"Cannot create a new data stream {dataPath}.");
}
public ValueTask <bool> CreateStreamAsync <T>(
string newStreamName,
Metadata metadata,
DataStreamCreateFlags flags = DataStreamCreateFlags.None)
{
var dp = _dataPathPrefix.Combine(newStreamName, false);
return(_dataStore.CreateStreamAsync <T>(dp, metadata, flags));
}
