forked from TrueCloudLab/frostfs-s3-gw
496 lines
10 KiB
Go
496 lines
10 KiB
Go
package tree
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"sort"
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"time"
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"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
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"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/tree"
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"golang.org/x/exp/slices"
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)
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type nodeMeta struct {
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key string
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value []byte
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}
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func (m nodeMeta) GetKey() string {
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return m.key
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}
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func (m nodeMeta) GetValue() []byte {
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return m.value
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}
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type nodeResponse struct {
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meta []nodeMeta
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nodeID uint64
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parentID uint64
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timestamp uint64
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}
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func (n nodeResponse) GetNodeID() []uint64 {
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return []uint64{n.nodeID}
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}
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func (n nodeResponse) GetParentID() []uint64 {
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return []uint64{n.parentID}
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}
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func (n nodeResponse) GetTimestamp() []uint64 {
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return []uint64{n.timestamp}
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}
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func (n nodeResponse) GetMeta() []Meta {
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res := make([]Meta, len(n.meta))
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for i, value := range n.meta {
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res[i] = value
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}
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return res
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}
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func (n nodeResponse) getValue(key string) string {
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for _, value := range n.meta {
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if value.key == key {
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return string(value.value)
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}
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}
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return ""
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}
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type ServiceClientMemory struct {
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containers map[string]containerInfo
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}
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type containerInfo struct {
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bkt *data.BucketInfo
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trees map[string]memoryTree
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}
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type memoryTree struct {
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idCounter uint64
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treeData *treeNodeMemory
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}
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type treeNodeMemory struct {
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data nodeResponse
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parent *treeNodeMemory
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children []*treeNodeMemory
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}
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func (t *treeNodeMemory) getNode(nodeID uint64) *treeNodeMemory {
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if t.data.nodeID == nodeID {
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return t
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}
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for _, child := range t.children {
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if node := child.getNode(nodeID); node != nil {
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return node
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}
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}
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return nil
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}
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func (t *memoryTree) getNodesByPath(path []string) []nodeResponse {
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if len(path) == 0 {
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return nil
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}
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var res []nodeResponse
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for _, child := range t.treeData.children {
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res = child.listNodesByPath(res, path)
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}
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return res
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}
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func (t *treeNodeMemory) listNodesByPath(res []nodeResponse, path []string) []nodeResponse {
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if len(path) == 0 || t.data.getValue(FileNameKey) != path[0] {
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return res
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}
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if len(path) == 1 {
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return append(res, t.data)
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}
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for _, ch := range t.children {
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res = ch.listNodesByPath(res, path[1:])
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}
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return res
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}
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func (t *memoryTree) createPathIfNotExist(parent *treeNodeMemory, path []string) *treeNodeMemory {
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if len(path) == 0 {
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return parent
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}
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var node *treeNodeMemory
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for _, child := range parent.children {
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if len(child.data.meta) == 1 && child.data.getValue(FileNameKey) == path[0] {
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node = child
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break
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}
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}
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if node == nil {
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node = &treeNodeMemory{
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data: nodeResponse{
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meta: []nodeMeta{{key: FileNameKey, value: []byte(path[0])}},
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nodeID: t.idCounter,
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parentID: parent.data.nodeID,
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timestamp: uint64(time.Now().UnixMicro()),
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},
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parent: parent,
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}
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t.idCounter++
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parent.children = append(parent.children, node)
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}
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return t.createPathIfNotExist(node, path[1:])
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}
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func (t *treeNodeMemory) removeChild(nodeID uint64) {
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ind := -1
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for i, ch := range t.children {
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if ch.data.nodeID == nodeID {
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ind = i
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break
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}
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}
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if ind != -1 {
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t.children = append(t.children[:ind], t.children[ind+1:]...)
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}
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}
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func (t *treeNodeMemory) listNodes(res []NodeResponse, depth uint32) []NodeResponse {
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res = append(res, t.data)
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if depth == 0 {
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return res
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}
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for _, ch := range t.children {
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res = ch.listNodes(res, depth-1)
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}
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return res
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}
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func NewTreeServiceClientMemory() (*ServiceClientMemory, error) {
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return &ServiceClientMemory{
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containers: make(map[string]containerInfo),
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}, nil
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}
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type nodeResponseWrapper struct {
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nodeResponse
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allAttr bool
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attrs []string
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}
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func (n nodeResponseWrapper) GetMeta() []Meta {
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res := make([]Meta, 0, len(n.meta))
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for _, value := range n.meta {
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if n.allAttr || slices.Contains(n.attrs, value.key) {
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res = append(res, value)
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}
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}
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return res
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}
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func (c *ServiceClientMemory) GetNodes(_ context.Context, p *GetNodesParams) ([]NodeResponse, error) {
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cnr, ok := c.containers[p.BktInfo.CID.EncodeToString()]
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if !ok {
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return nil, nil
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}
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tr, ok := cnr.trees[p.TreeID]
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if !ok {
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return nil, nil
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}
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res := tr.getNodesByPath(p.Path)
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sort.Slice(res, func(i, j int) bool {
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return res[i].timestamp < res[j].timestamp
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})
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if p.LatestOnly && len(res) != 0 {
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res = res[len(res)-1:]
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}
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res2 := make([]NodeResponse, len(res))
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for i, n := range res {
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res2[i] = nodeResponseWrapper{
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nodeResponse: n,
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allAttr: p.AllAttrs,
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attrs: p.Meta,
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}
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}
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return res2, nil
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}
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func (c *ServiceClientMemory) GetSubTree(_ context.Context, bktInfo *data.BucketInfo, treeID string, rootID []uint64, depth uint32, sort bool) ([]NodeResponse, error) {
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cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
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if !ok {
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return nil, nil
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}
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tr, ok := cnr.trees[treeID]
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if !ok {
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return nil, tree.ErrNodeNotFound
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}
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if len(rootID) != 1 {
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return nil, errors.New("invalid rootID")
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}
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node := tr.treeData.getNode(rootID[0])
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if node == nil {
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return nil, tree.ErrNodeNotFound
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}
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if sort {
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sortNode(tr.treeData)
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}
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// we depth-1 in case of uint32 and 0 as mark to get all subtree leads to overflow and depth is getting quite big to walk all tree levels
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return node.listNodes(nil, depth-1), nil
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}
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type SubTreeStreamMemoryImpl struct {
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res []NodeResponse
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offset int
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err error
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}
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func (s *SubTreeStreamMemoryImpl) Next() (NodeResponse, error) {
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if s.err != nil {
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return nil, s.err
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}
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if s.offset > len(s.res)-1 {
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return nil, io.EOF
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}
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s.offset++
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return s.res[s.offset-1], nil
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}
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func (c *ServiceClientMemory) GetSubTreeStream(_ context.Context, bktInfo *data.BucketInfo, treeID string, rootID []uint64, depth uint32) (SubTreeStream, error) {
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cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
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if !ok {
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return &SubTreeStreamMemoryImpl{err: tree.ErrNodeNotFound}, nil
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}
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tr, ok := cnr.trees[treeID]
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if !ok {
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return nil, tree.ErrNodeNotFound
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}
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if len(rootID) != 1 {
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return nil, errors.New("invalid rootID")
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}
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node := tr.treeData.getNode(rootID[0])
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if node == nil {
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return nil, tree.ErrNodeNotFound
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}
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sortNode(tr.treeData)
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return &SubTreeStreamMemoryImpl{
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res: node.listNodes(nil, depth-1),
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offset: 0,
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}, nil
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}
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func newContainerInfo(bktInfo *data.BucketInfo, treeID string) containerInfo {
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return containerInfo{
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bkt: bktInfo,
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trees: map[string]memoryTree{
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treeID: {
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idCounter: 1,
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treeData: &treeNodeMemory{
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data: nodeResponse{
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timestamp: uint64(time.Now().UnixMicro()),
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},
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},
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},
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},
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}
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}
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func newMemoryTree() memoryTree {
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return memoryTree{
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idCounter: 1,
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treeData: &treeNodeMemory{
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data: nodeResponse{
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timestamp: uint64(time.Now().UnixMicro()),
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},
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},
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}
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}
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func (c *ServiceClientMemory) AddNode(ctx context.Context, bktInfo *data.BucketInfo, treeID string, parent uint64, meta map[string]string) (uint64, error) {
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return c.AddNodeBase(ctx, bktInfo, treeID, parent, meta, true)
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}
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func (c *ServiceClientMemory) AddNodeBase(_ context.Context, bktInfo *data.BucketInfo, treeID string, parent uint64, meta map[string]string, needSort bool) (uint64, error) {
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cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
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if !ok {
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cnr = newContainerInfo(bktInfo, treeID)
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c.containers[bktInfo.CID.EncodeToString()] = cnr
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}
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tr, ok := cnr.trees[treeID]
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if !ok {
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tr = newMemoryTree()
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cnr.trees[treeID] = tr
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}
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parentNode := tr.treeData.getNode(parent)
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if parentNode == nil {
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return 0, tree.ErrNodeNotFound
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}
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newID := tr.idCounter
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tr.idCounter++
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tn := &treeNodeMemory{
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data: nodeResponse{
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meta: metaToNodeMeta(meta),
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nodeID: newID,
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parentID: parent,
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timestamp: uint64(time.Now().UnixMicro()),
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},
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parent: parentNode,
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}
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parentNode.children = append(parentNode.children, tn)
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if needSort {
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sortNodes(parentNode.children)
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}
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cnr.trees[treeID] = tr
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return newID, nil
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}
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func (c *ServiceClientMemory) AddNodeByPath(_ context.Context, bktInfo *data.BucketInfo, treeID string, path []string, meta map[string]string) (uint64, error) {
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cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
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if !ok {
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cnr = newContainerInfo(bktInfo, treeID)
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c.containers[bktInfo.CID.EncodeToString()] = cnr
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}
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tr, ok := cnr.trees[treeID]
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if !ok {
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tr = newMemoryTree()
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cnr.trees[treeID] = tr
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}
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parentNode := tr.createPathIfNotExist(tr.treeData, path)
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if parentNode == nil {
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return 0, fmt.Errorf("create path '%s'", path)
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}
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newID := tr.idCounter
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tr.idCounter++
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tn := &treeNodeMemory{
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data: nodeResponse{
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meta: metaToNodeMeta(meta),
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nodeID: newID,
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parentID: parentNode.data.nodeID,
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timestamp: uint64(time.Now().UnixMicro()),
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},
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parent: parentNode,
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}
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parentNode.children = append(parentNode.children, tn)
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cnr.trees[treeID] = tr
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return newID, nil
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}
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func (c *ServiceClientMemory) MoveNode(_ context.Context, bktInfo *data.BucketInfo, treeID string, nodeID, parentID uint64, meta map[string]string) error {
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cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
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if !ok {
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return tree.ErrNodeNotFound
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}
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tr, ok := cnr.trees[treeID]
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if !ok {
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return tree.ErrNodeNotFound
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}
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node := tr.treeData.getNode(nodeID)
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if node == nil {
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return tree.ErrNodeNotFound
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}
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newParent := tr.treeData.getNode(parentID)
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if newParent == nil {
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return tree.ErrNodeNotFound
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}
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node.data.meta = metaToNodeMeta(meta)
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node.data.parentID = parentID
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newParent.children = append(newParent.children, node)
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node.parent.removeChild(nodeID)
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return nil
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}
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func sortNode(node *treeNodeMemory) {
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if node == nil {
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return
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}
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sortNodes(node.children)
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for _, child := range node.children {
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sortNode(child)
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}
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}
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func sortNodes(list []*treeNodeMemory) {
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sort.Slice(list, func(i, j int) bool {
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return list[i].data.getValue(FileNameKey) < list[j].data.getValue(FileNameKey)
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})
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}
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func (c *ServiceClientMemory) RemoveNode(_ context.Context, bktInfo *data.BucketInfo, treeID string, nodeID uint64) error {
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cnr, ok := c.containers[bktInfo.CID.EncodeToString()]
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if !ok {
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return tree.ErrNodeNotFound
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}
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tr, ok := cnr.trees[treeID]
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if !ok {
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return tree.ErrNodeNotFound
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}
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node := tr.treeData.getNode(nodeID)
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if node == nil {
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return tree.ErrNodeNotFound
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}
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node.parent.removeChild(nodeID)
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return nil
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}
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func metaToNodeMeta(m map[string]string) []nodeMeta {
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result := make([]nodeMeta, 0, len(m))
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for key, value := range m {
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result = append(result, nodeMeta{key: key, value: []byte(value)})
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}
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return result
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}
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