forked from TrueCloudLab/frostfs-node
[#948] shard: Add ListWithCursor method
Interface for metabase.ListWithCursor method invocation. Signed-off-by: Alex Vanin <alexey@nspcc.ru>
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1a829a521f
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1950724a04
1 changed files with 65 additions and 0 deletions
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@ -19,6 +19,42 @@ func (r *ListContainersRes) Containers() []*cid.ID {
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return r.containers
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}
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// ListWithCursorPrm contains parameters for ListWithCursor operation.
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type ListWithCursorPrm struct {
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count uint32
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cursor string
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}
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// ListWithCursorRes contains values returned from ListWithCursor operation.
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type ListWithCursorRes struct {
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addrList []*object.Address
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cursor string
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}
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// WithCount sets maximum amount of addresses that ListWithCursor can return.
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func (p *ListWithCursorPrm) WithCount(count uint32) *ListWithCursorPrm {
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p.count = count
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return p
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}
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// WithCursor sets cursor for ListWithCursor operation. For initial request,
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// ignore this param or use empty string. For continues requests, use value
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// from ListWithCursorRes.
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func (p *ListWithCursorPrm) WithCursor(cursor string) *ListWithCursorPrm {
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p.cursor = cursor
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return p
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}
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// AddressList returns addresses selected by ListWithCursor operation.
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func (r ListWithCursorRes) AddressList() []*object.Address {
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return r.addrList
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}
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// Cursor returns cursor for consecutive listing requests.
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func (r ListWithCursorRes) Cursor() string {
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return r.cursor
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}
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// List returns all objects physically stored in the Shard.
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func (s *Shard) List() (*SelectRes, error) {
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lst, err := s.metaBase.Containers()
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@ -65,3 +101,32 @@ func ListContainers(s *Shard) ([]*cid.ID, error) {
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return res.Containers(), nil
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}
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// ListWithCursor lists physical objects available in shard starting from
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// cursor. Includes regular, tombstone and storage group objects. Does not
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// include inhumed objects. Use cursor value from response for consecutive requests.
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func (s *Shard) ListWithCursor(prm *ListWithCursorPrm) (*ListWithCursorRes, error) {
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metaPrm := new(meta.ListPrm).WithCount(prm.count).WithCursor(prm.cursor)
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res, err := s.metaBase.ListWithCursor(metaPrm)
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if err != nil {
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return nil, fmt.Errorf("could not get list of objects: %w", err)
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}
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return &ListWithCursorRes{
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addrList: res.AddressList(),
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cursor: res.Cursor(),
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}, nil
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}
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// ListWithCursor lists physical objects available in shard starting from
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// cursor. Includes regular, tombstone and storage group objects. Does not
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// include inhumed objects. Use cursor value from response for consecutive requests.
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func ListWithCursor(s *Shard, count uint32, cursor string) ([]*object.Address, string, error) {
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prm := new(ListWithCursorPrm).WithCount(count).WithCursor(cursor)
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res, err := s.ListWithCursor(prm)
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if err != nil {
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return nil, "", err
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}
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return res.AddressList(), res.Cursor(), nil
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}
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