/// <summary> /// A reference to this index after it was loaded into the memory /// or connected by a proxy class /// </summary> private Exceptional<IVersionedIndexObject<IndexKey, ObjectUUID>> GetIndexReference(DBIndexManager indexManager) { if (_indexReference == null) { 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 = indexManager.GetIndex(IndexType); if (!emptyIdx.Success()) { return emptyIdx; } var indexExceptional = indexManager.LoadOrCreateDBIndex(FileSystemLocation, emptyIdx.Value); if (indexExceptional.Failed()) { return new Exceptional<IVersionedIndexObject<IndexKey, ObjectUUID>>(indexExceptional); } _indexReference = indexExceptional.Value; } return new Exceptional<IVersionedIndexObject<IndexKey, ObjectUUID>>(_indexReference); }
/// <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; }