Golang DAGService.Get方法代码示例

本文整理汇总了Golang中github.com/ipfs/go-ipfs/merkledag.DAGService.Get方法的典型用法代码示例。如果您正苦于以下问题：Golang DAGService.Get方法的具体用法？Golang DAGService.Get怎么用？Golang DAGService.Get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/ipfs/go-ipfs/merkledag.DAGService的用法示例。

在下文中一共展示了DAGService.Get方法的9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: LoadPinner

// LoadPinner loads a pinner and its keysets from the given datastore
func LoadPinner(d ds.Datastore, dserv, internal mdag.DAGService) (Pinner, error) {
	p := new(pinner)

	rootKeyI, err := d.Get(pinDatastoreKey)
	if err != nil {
		return nil, fmt.Errorf("cannot load pin state: %v", err)
	}
	rootKeyBytes, ok := rootKeyI.([]byte)
	if !ok {
		return nil, fmt.Errorf("cannot load pin state: %s was not bytes", pinDatastoreKey)
	}

	rootCid, err := cid.Cast(rootKeyBytes)
	if err != nil {
		return nil, err
	}

	ctx, cancel := context.WithTimeout(context.TODO(), time.Second*5)
	defer cancel()

	root, err := internal.Get(ctx, rootCid)
	if err != nil {
		return nil, fmt.Errorf("cannot find pinning root object: %v", err)
	}

	rootpb, ok := root.(*mdag.ProtoNode)
	if !ok {
		return nil, mdag.ErrNotProtobuf
	}

	internalset := cid.NewSet()
	internalset.Add(rootCid)
	recordInternal := internalset.Add

	{ // load recursive set
		recurseKeys, err := loadSet(ctx, internal, rootpb, linkRecursive, recordInternal)
		if err != nil {
			return nil, fmt.Errorf("cannot load recursive pins: %v", err)
		}
		p.recursePin = cidSetWithValues(recurseKeys)
	}

	{ // load direct set
		directKeys, err := loadSet(ctx, internal, rootpb, linkDirect, recordInternal)
		if err != nil {
			return nil, fmt.Errorf("cannot load direct pins: %v", err)
		}
		p.directPin = cidSetWithValues(directKeys)
	}

	p.internalPin = internalset

	// assign services
	p.dserv = dserv
	p.dstore = d
	p.internal = internal

	return p, nil
}

开发者ID:VictorBjelkholm，项目名称:go-ipfs，代码行数:60，代码来源:pin.go

示例2: LoadPinner

// LoadPinner loads a pinner and its keysets from the given datastore
func LoadPinner(d ds.Datastore, dserv mdag.DAGService) (Pinner, error) {
	p := new(pinner)

	rootKeyI, err := d.Get(pinDatastoreKey)
	if err != nil {
		return nil, fmt.Errorf("cannot load pin state: %v", err)
	}
	rootKeyBytes, ok := rootKeyI.([]byte)
	if !ok {
		return nil, fmt.Errorf("cannot load pin state: %s was not bytes", pinDatastoreKey)
	}

	rootKey := key.Key(rootKeyBytes)

	ctx, cancel := context.WithTimeout(context.TODO(), time.Second*5)
	defer cancel()

	root, err := dserv.Get(ctx, rootKey)
	if err != nil {
		return nil, fmt.Errorf("cannot find pinning root object: %v", err)
	}

	internalPin := map[key.Key]struct{}{
		rootKey: struct{}{},
	}
	recordInternal := func(k key.Key) {
		internalPin[k] = struct{}{}
	}

	{ // load recursive set
		recurseKeys, err := loadSet(ctx, dserv, root, linkRecursive, recordInternal)
		if err != nil {
			return nil, fmt.Errorf("cannot load recursive pins: %v", err)
		}
		p.recursePin = set.SimpleSetFromKeys(recurseKeys)
	}

	{ // load direct set
		directKeys, err := loadSet(ctx, dserv, root, linkDirect, recordInternal)
		if err != nil {
			return nil, fmt.Errorf("cannot load direct pins: %v", err)
		}
		p.directPin = set.SimpleSetFromKeys(directKeys)
	}

	p.internalPin = internalPin

	// assign services
	p.dserv = dserv
	p.dstore = d

	return p, nil
}

开发者ID:noffle，项目名称:go-ipfs，代码行数:54，代码来源:pin.go

示例3: ApplyChange

func ApplyChange(ctx context.Context, ds dag.DAGService, nd *dag.ProtoNode, cs []*Change) (*dag.ProtoNode, error) {
	e := NewDagEditor(nd, ds)
	for _, c := range cs {
		switch c.Type {
		case Add:
			child, err := ds.Get(ctx, c.After)
			if err != nil {
				return nil, err
			}

			childpb, ok := child.(*dag.ProtoNode)
			if !ok {
				return nil, dag.ErrNotProtobuf
			}

			err = e.InsertNodeAtPath(ctx, c.Path, childpb, nil)
			if err != nil {
				return nil, err
			}

		case Remove:
			err := e.RmLink(ctx, c.Path)
			if err != nil {
				return nil, err
			}

		case Mod:
			err := e.RmLink(ctx, c.Path)
			if err != nil {
				return nil, err
			}
			child, err := ds.Get(ctx, c.After)
			if err != nil {
				return nil, err
			}

			childpb, ok := child.(*dag.ProtoNode)
			if !ok {
				return nil, dag.ErrNotProtobuf
			}

			err = e.InsertNodeAtPath(ctx, c.Path, childpb, nil)
			if err != nil {
				return nil, err
			}
		}
	}

	return e.Finalize(ds)
}

开发者ID:VictorBjelkholm，项目名称:go-ipfs，代码行数:50，代码来源:diff.go

示例4: Descendants

func Descendants(ctx context.Context, ds dag.DAGService, set key.KeySet, roots []key.Key, bestEffort bool) error {
	for _, k := range roots {
		set.Add(k)
		nd, err := ds.Get(ctx, k)
		if err != nil {
			return err
		}

		// EnumerateChildren recursively walks the dag and adds the keys to the given set
		err = dag.EnumerateChildren(ctx, ds, nd, set, bestEffort)
		if err != nil {
			return err
		}
	}

	return nil
}

开发者ID:kpcyrd，项目名称:go-ipfs，代码行数:17，代码来源:gc.go

示例5: Descendants

func Descendants(ds dag.DAGService, set key.KeySet, roots []key.Key) error {
	for _, k := range roots {
		set.Add(k)
		nd, err := ds.Get(context.Background(), k)
		if err != nil {
			return err
		}

		// EnumerateChildren recursively walks the dag and adds the keys to the given set
		err = dag.EnumerateChildren(context.Background(), ds, nd, set)
		if err != nil {
			return err
		}
	}

	return nil
}

开发者ID:noffle，项目名称:go-ipfs，代码行数:17，代码来源:gc.go

示例6: addLink

func addLink(ctx context.Context, ds dag.DAGService, root *dag.Node, childname string, childk key.Key) (*dag.Node, error) {
	ctx, cancel := context.WithTimeout(ctx, time.Second*30)
	childnd, err := ds.Get(ctx, childk)
	if err != nil {
		cancel()
		return nil, err
	}
	cancel()

	err = root.AddNodeLinkClean(childname, childnd)
	if err != nil {
		return nil, err
	}

	_, err = ds.Add(root)
	if err != nil {
		return nil, err
	}
	return root, nil
}

开发者ID:bit4bit，项目名称:go-ipfs，代码行数:20，代码来源:object.go

示例7: addLink

func addLink(ctx context.Context, ds dag.DAGService, root *dag.Node, childname string, childk key.Key) (*dag.Node, error) {
	if childname == "" {
		return nil, errors.New("cannot create link with no name!")
	}

	childnd, err := ds.Get(ctx, childk)
	if err != nil {
		return nil, err
	}

	// ensure no link with that name already exists
	_ = root.RemoveNodeLink(childname) // ignore error, only option is ErrNotFound

	if err := root.AddNodeLinkClean(childname, childnd); err != nil {
		return nil, err
	}

	if _, err := ds.Add(root); err != nil {
		return nil, err
	}
	return root, nil
}

开发者ID:thelinuxkid，项目名称:distribution，代码行数:22，代码来源:utils.go

示例8: ApplyChange

func ApplyChange(ctx context.Context, ds dag.DAGService, nd *dag.Node, cs []*Change) (*dag.Node, error) {
	e := NewDagEditor(ds, nd)
	for _, c := range cs {
		switch c.Type {
		case Add:
			child, err := ds.Get(ctx, c.After)
			if err != nil {
				return nil, err
			}
			err = e.InsertNodeAtPath(ctx, c.Path, child, nil)
			if err != nil {
				return nil, err
			}

		case Remove:
			err := e.RmLink(ctx, c.Path)
			if err != nil {
				return nil, err
			}

		case Mod:
			err := e.RmLink(ctx, c.Path)
			if err != nil {
				return nil, err
			}
			child, err := ds.Get(ctx, c.After)
			if err != nil {
				return nil, err
			}
			err = e.InsertNodeAtPath(ctx, c.Path, child, nil)
			if err != nil {
				return nil, err
			}
		}
	}
	return e.GetNode(), nil
}

开发者ID:andradeandrey，项目名称:go-ipfs，代码行数:37，代码来源:diff.go

示例9: hasChild

func hasChild(ds mdag.DAGService, root *mdag.Node, child key.Key) (bool, error) {
	for _, lnk := range root.Links {
		k := key.Key(lnk.Hash)
		if k == child {
			return true, nil
		}

		nd, err := ds.Get(context.Background(), k)
		if err != nil {
			return false, err
		}

		has, err := hasChild(ds, nd, child)
		if err != nil {
			return false, err
		}

		if has {
			return has, nil
		}
	}
	return false, nil
}

开发者ID:noffle，项目名称:go-ipfs，代码行数:23，代码来源:pin.go

注：本文中的github.com/ipfs/go-ipfs/merkledag.DAGService.Get方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，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。