package splitstore import ( "path/filepath" "golang.org/x/xerrors" cid "github.com/ipfs/go-cid" ) // MarkSet is a utility to keep track of seen CID, and later query for them. // // * If the expected dataset is large, it can be backed by a datastore (e.g. bbolt). // * If a probabilistic result is acceptable, it can be backed by a bloom filter (default). type MarkSet interface { Mark(cid.Cid) error Has(cid.Cid) (bool, error) Close() error } // markBytes is deliberately a non-nil empty byte slice for serialization. var markBytes = []byte{} type MarkSetEnv interface { Create(name string, sizeHint int64) (MarkSet, error) Close() error } func OpenMarkSetEnv(path string, mtype string) (MarkSetEnv, error) { switch mtype { case "", "bloom": return NewBloomMarkSetEnv() case "bolt": return NewBoltMarkSetEnv(filepath.Join(path, "markset.bolt")) default: return nil, xerrors.Errorf("unknown mark set type %s", mtype) } }