frostfs-node/pkg/local_object_storage/engine/select.go

159 lines
4 KiB
Go
Raw Normal View History

package engine
import (
"github.com/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard"
cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
"github.com/TrueCloudLab/frostfs-sdk-go/object"
oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
)
// SelectPrm groups the parameters of Select operation.
type SelectPrm struct {
cnr cid.ID
filters object.SearchFilters
}
// SelectRes groups the resulting values of Select operation.
type SelectRes struct {
addrList []oid.Address
}
// WithContainerID is a Select option to set the container id to search in.
func (p *SelectPrm) WithContainerID(cnr cid.ID) {
p.cnr = cnr
}
// WithFilters is a Select option to set the object filters.
func (p *SelectPrm) WithFilters(fs object.SearchFilters) {
p.filters = fs
}
// AddressList returns list of addresses of the selected objects.
func (r SelectRes) AddressList() []oid.Address {
return r.addrList
}
// Select selects the objects from local storage that match select parameters.
//
// Returns any error encountered that did not allow to completely select the objects.
//
// Returns an error if executions are blocked (see BlockExecution).
func (e *StorageEngine) Select(prm SelectPrm) (res SelectRes, err error) {
err = e.execIfNotBlocked(func() error {
res, err = e._select(prm)
return err
})
return
}
func (e *StorageEngine) _select(prm SelectPrm) (SelectRes, error) {
if e.metrics != nil {
defer elapsed(e.metrics.AddSearchDuration)()
}
addrList := make([]oid.Address, 0)
uniqueMap := make(map[string]struct{})
var outError error
var shPrm shard.SelectPrm
shPrm.SetContainerID(prm.cnr)
shPrm.SetFilters(prm.filters)
e.iterateOverUnsortedShards(func(sh hashedShard) (stop bool) {
res, err := sh.Select(shPrm)
if err != nil {
e.reportShardError(sh, "could not select objects from shard", err)
return false
}
for _, addr := range res.AddressList() { // save only unique values
if _, ok := uniqueMap[addr.EncodeToString()]; !ok {
uniqueMap[addr.EncodeToString()] = struct{}{}
addrList = append(addrList, addr)
}
}
return false
})
return SelectRes{
addrList: addrList,
}, outError
}
// List returns `limit` available physically storage object addresses in engine.
// If limit is zero, then returns all available object addresses.
//
// Returns an error if executions are blocked (see BlockExecution).
func (e *StorageEngine) List(limit uint64) (res SelectRes, err error) {
err = e.execIfNotBlocked(func() error {
res, err = e.list(limit)
return err
})
return
}
func (e *StorageEngine) list(limit uint64) (SelectRes, error) {
if e.metrics != nil {
defer elapsed(e.metrics.AddListObjectsDuration)()
}
addrList := make([]oid.Address, 0, limit)
uniqueMap := make(map[string]struct{})
ln := uint64(0)
// consider iterating over shuffled shards
e.iterateOverUnsortedShards(func(sh hashedShard) (stop bool) {
res, err := sh.List() // consider limit result of shard iterator
if err != nil {
e.reportShardError(sh, "could not select objects from shard", err)
} else {
for _, addr := range res.AddressList() { // save only unique values
if _, ok := uniqueMap[addr.EncodeToString()]; !ok {
uniqueMap[addr.EncodeToString()] = struct{}{}
addrList = append(addrList, addr)
ln++
if limit > 0 && ln >= limit {
return true
}
}
}
}
return false
})
return SelectRes{
addrList: addrList,
}, nil
}
// Select selects objects from local storage using provided filters.
func Select(storage *StorageEngine, cnr cid.ID, fs object.SearchFilters) ([]oid.Address, error) {
var selectPrm SelectPrm
selectPrm.WithContainerID(cnr)
selectPrm.WithFilters(fs)
res, err := storage.Select(selectPrm)
if err != nil {
return nil, err
}
return res.AddressList(), nil
}
// List returns `limit` available physically storage object addresses in
// engine. If limit is zero, then returns all available object addresses.
func List(storage *StorageEngine, limit uint64) ([]oid.Address, error) {
res, err := storage.List(limit)
if err != nil {
return nil, err
}
return res.AddressList(), nil
}