Golang proto.HistoryEntry类代码示例

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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，您的评价将有助于我们的系统推荐出更棒的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()
}

开发者ID:rlugojr，项目名称:cayley，代码行数:31，代码来源:quadstore.go

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
}

开发者ID:RamboWANG，项目名称:cayley，代码行数:42，代码来源:quadstore.go

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
}

开发者ID:rlugojr，项目名称:cayley，代码行数:39，代码来源:quadstore.go

示例4: isLiveValue

func (it *Iterator) isLiveValue(val []byte) bool {
	var entry proto.HistoryEntry
	entry.Unmarshal(val)
	return len(entry.History)%2 != 0
}

开发者ID:RamboWANG，项目名称:cayley，代码行数:5，代码来源:iterator.go

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
}

开发者ID:rlugojr，项目名称:cayley，代码行数:77，代码来源:migrate.go

注：本文中的github.com/cayleygraph/cayley/graph/proto.HistoryEntry类示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。