/// <summary>
/// A reference to this index after it was loaded into the memory
/// or connected by a proxy class
/// </summary>
/// <param name="indexManager">The database index manager</param>
/// <param name="idxShard">The shard that should be loaded</param>
/// <returns>A versioned idx object</returns>
public Exceptional<IVersionedIndexObject<IndexKey, ObjectUUID>> GetIndexReference(DBIndexManager indexManager, int idxShard)
{
if (!indexManager.HasIndex(IndexType))
{
// the index type does not exist anymore - return null or throw exception
return new Exceptional<IVersionedIndexObject<IndexKey, ObjectUUID>>(new GraphDBError("Index is away!"));
}
var emptyIdx = new VersionedHashIndexObject<IndexKey, ObjectUUID>();
var indexExceptional = indexManager.LoadOrCreateShardedDBIndex(FileSystemLocation + idxShard.ToString(), emptyIdx, this);
if (indexExceptional.Failed())
{
return new Exceptional<IVersionedIndexObject<IndexKey, ObjectUUID>>(indexExceptional);
}
return indexExceptional;
}
/// <summary>
/// A reference to this index after it was loaded into the memory
/// or connected by a proxy class
/// </summary>
/// <param name="indexManager">The database index manager</param>
/// <param name="idxShard">The shard that should be loaded</param>
/// <returns>A versioned idx object</returns>
private Exceptional SetIndexReference(DBContext myDBContext)
{
var result = myDBContext.IGraphFSSession.GetOrCreateFSObject<AFSObject>(FileSystemLocation, DBConstants.DBINDEXSTREAM, () => new VersionedHashIndexObject<IndexKey, ObjectUUID>());
if (!result.Success())
{
return new Exceptional<IVersionedIndexObject<IndexKey, ObjectUUID>>(result);
}
else
{
if (result.Value.isNew)
{
// Uncomment as soon as index is serializeable
result.PushIExceptional(myDBContext.IGraphFSSession.StoreFSObject(result.Value, false));
if (result.Failed())
{
return new Exceptional<IVersionedIndexObject<IndexKey, ObjectUUID>>(result);
}
//result.AddErrorsAndWarnings(result.Value.Save());
//ToDo: Fehler beim Speichern werden im Weiterm ignoriert statt darauf reagiert!
}
_indexDatastructure = result.Value as VersionedHashIndexObject<IndexKey, ObjectUUID>;
}
return Exceptional.OK;
// var indexExceptional = indexManager.LoadOrCreateVersionedDBIndex(FileSystemLocation, new VersionedHashIndexObject<IndexKey, ObjectUUID>(), this);
// if (indexExceptional.Failed())
// {
// return new Exceptional(indexExceptional);
// }
// _indexDatastructure = indexExceptional.Value as VersionedHashIndexObject<IndexKey, ObjectUUID>;
// return Exceptional.OK;
//}
}
