127 lines
3.3 KiB
Go
127 lines
3.3 KiB
Go
package engine
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import (
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"github.com/nspcc-dev/neofs-api-go/pkg/object"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
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"go.uber.org/zap"
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)
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// SelectPrm groups the parameters of Select operation.
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type SelectPrm struct {
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filters object.SearchFilters
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}
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// SelectRes groups resulting values of Select operation.
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type SelectRes struct {
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addrList []*object.Address
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}
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// WithFilters is a Select option to set the object filters.
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func (p *SelectPrm) WithFilters(fs object.SearchFilters) *SelectPrm {
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if p != nil {
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p.filters = fs
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}
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return p
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}
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// AddressList returns list of addresses of the selected objects.
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func (r *SelectRes) AddressList() []*object.Address {
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return r.addrList
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}
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// Select selects the objects from local storage that match select parameters.
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//
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// Returns any error encountered that did not allow to completely select the objects.
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func (e *StorageEngine) Select(prm *SelectPrm) (*SelectRes, error) {
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addrList := make([]*object.Address, 0)
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uniqueMap := make(map[string]struct{})
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shPrm := new(shard.SelectPrm).
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WithFilters(prm.filters)
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e.iterateOverUnsortedShards(func(sh *shard.Shard) (stop bool) {
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res, err := sh.Select(shPrm)
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if err != nil {
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// TODO: smth wrong with shard, need to be processed
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e.log.Warn("could not select objects from shard",
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zap.Stringer("shard", sh.ID()),
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zap.String("error", err.Error()),
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)
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} else {
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for _, addr := range res.AddressList() { // save only unique values
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if _, ok := uniqueMap[addr.String()]; !ok {
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uniqueMap[addr.String()] = struct{}{}
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addrList = append(addrList, addr)
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}
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}
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}
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return false
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})
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return &SelectRes{
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addrList: addrList,
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}, nil
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}
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// List returns `limit` available physically storage object addresses in engine.
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// If limit is zero, then returns all available object addresses.
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func (e *StorageEngine) List(limit uint64) (*SelectRes, error) {
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addrList := make([]*object.Address, limit)
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uniqueMap := make(map[string]struct{})
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ln := uint64(0)
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// consider iterating over shuffled shards
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e.iterateOverUnsortedShards(func(sh *shard.Shard) (stop bool) {
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res, err := sh.List() // consider limit result of shard iterator
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if err != nil {
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// TODO: smth wrong with shard, need to be processed
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e.log.Warn("could not select objects from shard",
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zap.Stringer("shard", sh.ID()),
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zap.String("error", err.Error()),
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)
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} else {
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for _, addr := range res.AddressList() { // save only unique values
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if _, ok := uniqueMap[addr.String()]; !ok {
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uniqueMap[addr.String()] = struct{}{}
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addrList = append(addrList, addr)
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ln++
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if limit > 0 && ln >= limit {
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return true
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}
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}
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}
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}
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return false
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})
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return &SelectRes{
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addrList: addrList,
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}, nil
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}
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// Select selects objects from local storage using provided filters.
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func Select(storage *StorageEngine, fs object.SearchFilters) ([]*object.Address, error) {
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res, err := storage.Select(new(SelectPrm).
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WithFilters(fs),
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)
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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(), nil
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}
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// List returns `limit` available physically storage object addresses in
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// engine. If limit is zero, then returns all available object addresses.
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func List(storage *StorageEngine, limit uint64) ([]*object.Address, error) {
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res, err := storage.List(limit)
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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(), nil
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}
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