//
// Create a new iterator. EndKey is inclusive.
//
func (r *Repository) NewIterator(kind RepoKind, startKey, endKey string) (*RepoIterator, error) {
r.mutex.Lock()
defer r.mutex.Unlock()
k1, err := CollateString(startKey)
if err != nil {
return nil, err
}
k2, err := CollateString(endKey)
if err != nil {
return nil, err
}
// Create a snaphsot for iteration
var FORESTDB_INMEMSEQ = fdb.SeqNum(math.MaxUint64)
snapshot, err := r.stores[kind].SnapshotOpen(FORESTDB_INMEMSEQ)
iter, err := snapshot.IteratorInit(k1, k2, fdb.ITR_NO_DELETES)
if err != nil {
return nil, err
}
result := &RepoIterator{iter: iter, store: snapshot}
return result, nil
}
func (r *Repository) AcquireSnapshot(kind RepoKind) (common.Txnid, *RepoIterator, error) {
r.mutex.Lock()
defer r.mutex.Unlock()
if len(r.snapshots[kind]) == 0 {
return common.Txnid(0), nil, nil
}
snapshot := r.snapshots[kind][len(r.snapshots[kind])-1]
snapshot.count++
// Create a snaphsot for iteration
var FORESTDB_INMEMSEQ = fdb.SeqNum(math.MaxUint64)
kvstore, err := snapshot.snapshot.SnapshotOpen(FORESTDB_INMEMSEQ)
iter, err := kvstore.IteratorInit(nil, nil, fdb.ITR_NO_DELETES)
if err != nil {
return common.Txnid(0), nil, err
}
return snapshot.txnid, &RepoIterator{iter: iter, store: kvstore}, nil
}