func (qs *QuadStore) buildQuadWrite(batch *leveldb.Batch, q quad.Quad, id int64, isAdd bool) error {
var entry proto.HistoryEntry
data, err := qs.db.Get(createKeyFor(spo, q), qs.readopts)
if err != nil && err != leveldb.ErrNotFound {
glog.Error("could not access DB to prepare index: ", err)
return err
}
if data != nil {
// We got something.
err = entry.Unmarshal(data)
if err != nil {
return err
}
}
if isAdd && len(entry.History)%2 == 1 {
if glog.V(2) {
glog.Errorf("attempt to add existing quad %v: %#v", entry, q)
}
return graph.ErrQuadExists
}
if !isAdd && len(entry.History)%2 == 0 {
if glog.V(2) {
glog.Errorf("attempt to delete non-existent quad %v: %#c", entry, q)
}
return graph.ErrQuadNotExist
}
entry.History = append(entry.History, uint64(id))
bytes, err := entry.Marshal()
if err != nil {
glog.Errorf("could not write to buffer for entry %#v: %s", entry, err)
return err
}
batch.Put(createKeyFor(spo, q), bytes)
batch.Put(createKeyFor(osp, q), bytes)
batch.Put(createKeyFor(pos, q), bytes)
if q.Get(quad.Label) != nil {
batch.Put(createKeyFor(cps, q), bytes)
}
return nil
}
func (qs *QuadStore) buildQuadWrite(tx *bolt.Tx, q quad.Quad, id int64, isAdd bool) error {
var entry proto.HistoryEntry
b := tx.Bucket(spoBucket)
b.FillPercent = localFillPercent
data := b.Get(qs.createKeyFor(spo, q))
if data != nil {
// We got something.
err := entry.Unmarshal(data)
if err != nil {
return err
}
}
if isAdd && len(entry.History)%2 == 1 {
glog.Errorf("attempt to add existing quad %v: %#v", entry, q)
return graph.ErrQuadExists
}
if !isAdd && len(entry.History)%2 == 0 {
glog.Errorf("attempt to delete non-existent quad %v: %#v", entry, q)
return graph.ErrQuadNotExist
}
entry.History = append(entry.History, uint64(id))
bytes, err := entry.Marshal()
if err != nil {
glog.Errorf("Couldn't write to buffer for entry %#v: %s", entry, err)
return err
}
for _, index := range [][4]quad.Direction{spo, osp, pos, cps} {
if index == cps && q.Get(quad.Label) == nil {
continue
}
b := tx.Bucket(bucketFor(index))
b.FillPercent = localFillPercent
err = b.Put(qs.createKeyFor(index, q), bytes)
if err != nil {
return err
}
}
return nil
}
func (qs *QuadStore) buildQuadWriteLMDB(tx *lmdb.Txn, q quad.Quad, id int64, isAdd bool) error {
var entry proto.HistoryEntry
dbi := qs.dbis[spoDB]
data, err := tx.Get(dbi, qs.createKeyFor(spo, q))
if err == nil {
// We got something.
err := entry.Unmarshal(data)
if err != nil {
return err
}
}
if isAdd && len(entry.History)%2 == 1 {
glog.Errorf("attempt to add existing quad %v: %#v", entry, q)
return graph.ErrQuadExists
}
if !isAdd && len(entry.History)%2 == 0 {
glog.Errorf("attempt to delete non-existent quad %v: %#v", entry, q)
return graph.ErrQuadNotExist
}
entry.History = append(entry.History, uint64(id))
bytes, err := entry.Marshal()
if err != nil {
glog.Errorf("Couldn't write to buffer for entry %#v: %s", entry, err)
return err
}
for _, index := range [][4]quad.Direction{spo, osp, pos, cps} {
if index == cps && q.Get(quad.Label) == "" {
continue
}
dbi = qs.dbis[dbFor(index)]
err = tx.Put(dbi, qs.createKeyFor(index, q), bytes, 0)
if err != nil {
return err
}
}
return nil
}
func upgrade1To2(db *leveldb.DB) error {
fmt.Println("Upgrading v1 to v2...")
type v1IndexEntry struct {
Subject string `json:"subject"`
Predicate string `json:"predicate"`
Object string `json:"object"`
Label string `json:"label,omitempty"`
History []int64 `json:"History"`
}
type v1ValueData struct {
Name string `json:"Name"`
Size int64 `json:"Size"`
}
var (
spoPref = []byte{spo[0].Prefix(), spo[1].Prefix()}
ospPref = []byte{osp[0].Prefix(), osp[1].Prefix()}
posPref = []byte{pos[0].Prefix(), pos[1].Prefix()}
cpsPref = []byte{cps[0].Prefix(), cps[1].Prefix()}
)
{
fmt.Println("Upgrading bucket z")
it := db.NewIterator(&util.Range{Start: []byte{'z'}, Limit: []byte{'z' + 1}}, nil)
for it.Next() {
k, v := it.Key(), it.Value()
var val v1ValueData
if err := json.Unmarshal(v, &val); err != nil {
return err
}
node := proto.NodeData{
Size: val.Size,
Value: proto.MakeValue(quad.Raw(val.Name)),
}
nv, err := node.Marshal()
if err != nil {
return err
}
if err = db.Put(k, nv, nil); err != nil {
return err
}
}
it.Release()
}
for _, pref := range [4][]byte{spoPref, ospPref, posPref, cpsPref} {
fmt.Println("Upgrading bucket", string(pref))
end := []byte{pref[0], pref[1] + 1}
it := db.NewIterator(&util.Range{Start: pref, Limit: end}, nil)
for it.Next() {
k, v := it.Key(), it.Value()
var entry v1IndexEntry
if err := json.Unmarshal(v, &entry); err != nil {
return err
}
var h proto.HistoryEntry
h.History = make([]uint64, len(entry.History))
for i, id := range entry.History {
h.History[i] = uint64(id)
}
nv, err := h.Marshal()
if err != nil {
return err
}
if err = db.Put(k, nv, nil); err != nil {
return err
}
}
it.Release()
}
{
fmt.Println("Upgrading bucket d")
it := db.NewIterator(&util.Range{Start: []byte{'d'}, Limit: []byte{'d' + 1}}, nil)
for it.Next() {
k, v := it.Key(), it.Value()
id, err := strconv.ParseInt(string(k[1:]), 16, 64)
if err != nil {
return err
}
nk := createDeltaKeyFor(id)
var val graph.Delta
if err := json.Unmarshal(v, &val); err != nil {
return err
}
p := deltaToProto(val)
nv, err := p.Marshal()
if err != nil {
return err
}
b := &leveldb.Batch{}
b.Put(nk, nv)
b.Delete(k)
if err = db.Write(b, nil); err != nil {
return err
}
}
it.Release()
}
return nil
}
