本文整理汇总了Golang中github.com/cayleygraph/cayley/graph/proto.HistoryEntry类的典型用法代码示例。如果您正苦于以下问题：Golang HistoryEntry类的具体用法？Golang HistoryEntry怎么用？Golang HistoryEntry使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了HistoryEntry类的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: Quad
func (qs *QuadStore) Quad(k graph.Value) quad.Quad {
var d proto.LogDelta
tok := k.(*Token)
err := qs.db.View(func(tx *bolt.Tx) error {
b := tx.Bucket(tok.bucket)
data := b.Get(tok.key)
if data == nil {
return nil
}
var in proto.HistoryEntry
err := in.Unmarshal(data)
if err != nil {
return err
}
if len(in.History) == 0 {
return nil
}
b = tx.Bucket(logBucket)
data = b.Get(qs.createDeltaKeyFor(int64(in.History[len(in.History)-1])))
if data == nil {
// No harm, no foul.
return nil
}
return d.Unmarshal(data)
})
if err != nil {
clog.Errorf("Error getting quad: %v", err)
return quad.Quad{}
}
return d.Quad.ToNative()
}示例2: buildQuadWrite
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 {
clog.Errorf("attempt to add existing quad %v: %#v", entry, q)
return graph.ErrQuadExists
}
if !isAdd && len(entry.History)%2 == 0 {
clog.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 {
clog.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
}
b := tx.Bucket(bucketFor(index))
b.FillPercent = localFillPercent
err = b.Put(qs.createKeyFor(index, q), bytes)
if err != nil {
return err
}
}
return nil
}示例3: buildQuadWrite
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 {
clog.Errorf("could not access DB to prepare index: %v", 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 {
clog.Errorf("attempt to add existing quad %v: %#v", entry, q)
return graph.ErrQuadExists
}
if !isAdd && len(entry.History)%2 == 0 {
clog.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 {
clog.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
}示例4: isLiveValue
func (it *Iterator) isLiveValue(val []byte) bool {
var entry proto.HistoryEntry
entry.Unmarshal(val)
return len(entry.History)%2 != 0
}示例5: upgrade1To2
func upgrade1To2(db *bolt.DB) error {
fmt.Println("Upgrading v1 to v2...")
tx, err := db.Begin(true)
if err != nil {
return err
}
defer tx.Rollback()
fmt.Println("Upgrading bucket", string(logBucket))
lb := tx.Bucket(logBucket)
c := lb.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
var delta graph.Delta
err := json.Unmarshal(v, &delta)
if err != nil {
return err
}
newd := deltaToProto(delta)
data, err := newd.Marshal()
if err != nil {
return err
}
lb.Put(k, data)
}
if err := tx.Commit(); err != nil {
return err
}
tx, err = db.Begin(true)
if err != nil {
return err
}
defer tx.Rollback()
fmt.Println("Upgrading bucket", string(nodeBucket))
nb := tx.Bucket(nodeBucket)
c = nb.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
var vd proto.NodeData
err := json.Unmarshal(v, &vd)
if err != nil {
return err
}
data, err := vd.Marshal()
if err != nil {
return err
}
nb.Put(k, data)
}
if err := tx.Commit(); err != nil {
return err
}
for _, bucket := range [4][]byte{spoBucket, ospBucket, posBucket, cpsBucket} {
tx, err = db.Begin(true)
if err != nil {
return err
}
defer tx.Rollback()
fmt.Println("Upgrading bucket", string(bucket))
b := tx.Bucket(bucket)
cur := b.Cursor()
for k, v := cur.First(); k != nil; k, v = cur.Next() {
var h proto.HistoryEntry
err := json.Unmarshal(v, &h)
if err != nil {
return err
}
data, err := h.Marshal()
if err != nil {
return err
}
b.Put(k, data)
}
if err := tx.Commit(); err != nil {
return err
}
}
return nil
}