本文整理汇总了Golang中github.com/google/cayley/graph/proto.NodeData.Unmarshal方法的典型用法代码示例。如果您正苦于以下问题：Golang NodeData.Unmarshal方法的具体用法？Golang NodeData.Unmarshal怎么用？Golang NodeData.Unmarshal使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/google/cayley/graph/proto.NodeData的用法示例。
在下文中一共展示了NodeData.Unmarshal方法的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: UpdateValueKeyBy
// UpdateValueKeyBy ??
func (qs *QuadStore) UpdateValueKeyBy(name string, amount int64, tx *lmdb.Txn) error {
value := proto.NodeData{
Name: name,
Size_: amount,
}
key := qs.createValueKeyFor(name)
data, err := tx.Get(qs.nodeDBI, key)
if err == nil {
// Node exists in the database -- unmarshal and update.
var oldvalue proto.NodeData
err := oldvalue.Unmarshal(data)
if err != nil {
glog.Errorf("Error: couldn't reconstruct value: %v", err)
return err
}
oldvalue.Size_ += amount
value = oldvalue
}
// Are we deleting something?
if value.Size_ <= 0 {
value.Size_ = 0
}
// Repackage and rewrite.
bytes, err := value.Marshal()
if err != nil {
glog.Errorf("Couldn't write to buffer for value %s: %s", name, err)
return err
}
err = tx.Put(qs.nodeDBI, key, bytes, 0)
return err
}示例2: upgrade2To3
func upgrade2To3(db *bolt.DB) error {
fmt.Println("Upgrading v2 to v3...")
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 proto.LogDelta
err := delta.Unmarshal(v)
if err != nil {
return err
}
delta.Quad.Upgrade()
data, err := delta.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 := vd.Unmarshal(v)
if err != nil {
return err
}
vd.Upgrade()
data, err := vd.Marshal()
if err != nil {
return err
}
nb.Put(k, data)
}
if err := tx.Commit(); err != nil {
return err
}
return nil
}示例3: UpdateValueKeyBy
func (qs *QuadStore) UpdateValueKeyBy(name quad.Value, amount int64, batch *leveldb.Batch) error {
value := proto.NodeData{
Value: proto.MakeValue(name),
Size: amount,
}
key := createValueKeyFor(name)
b, err := qs.db.Get(key, qs.readopts)
// Error getting the node from the database.
if err != nil && err != leveldb.ErrNotFound {
glog.Errorf("Error reading Value %s from the DB.", name)
return err
}
// Node exists in the database -- unmarshal and update.
if b != nil && err != leveldb.ErrNotFound {
var oldvalue proto.NodeData
err = oldvalue.Unmarshal(b)
if err != nil {
glog.Errorf("Error: could not reconstruct value: %v", err)
return err
}
oldvalue.Size += amount
value = oldvalue
}
// Are we deleting something?
if value.Size <= 0 {
value.Size = 0
}
// Repackage and rewrite.
bytes, err := value.Marshal()
if err != nil {
glog.Errorf("could not write to buffer for value %s: %s", name, err)
return err
}
if batch == nil {
qs.db.Put(key, bytes, qs.writeopts)
} else {
batch.Put(key, bytes)
}
return nil
}示例4: valueData
func (qs *QuadStore) valueData(t *Token) proto.NodeData {
var out proto.NodeData
if glog.V(3) {
glog.V(3).Infof("%s %v", string(t.bucket), t.key)
}
err := qs.db.View(func(tx *bolt.Tx) error {
b := tx.Bucket(t.bucket)
data := b.Get(t.key)
if data != nil {
return out.Unmarshal(data)
}
return nil
})
if err != nil {
glog.Errorln("Error: couldn't get value")
return proto.NodeData{}
}
return out
}示例5: valueDataLMDB
func (qs *QuadStore) valueDataLMDB(t *Token) proto.NodeData {
var out proto.NodeData
if glog.V(3) {
glog.V(3).Infof("%s %v", string(t.db), t.key)
}
err := qs.env.View(func(tx *lmdb.Txn) (err error) {
tx.RawRead = true
dbi := qs.dbis[t.db]
data, err := tx.Get(dbi, t.key)
if err == nil {
return out.Unmarshal(data)
}
return nil
})
if err != nil {
glog.Errorln("Error: couldn't get value")
return proto.NodeData{}
}
return out
}