81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
package engine
|
|
|
|
import (
|
|
"errors"
|
|
|
|
objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
|
|
"github.com/nspcc-dev/neofs-node/pkg/core/object"
|
|
"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
|
|
"go.uber.org/zap"
|
|
)
|
|
|
|
// ExistsPrm groups the parameters of Exists operation.
|
|
type ExistsPrm struct {
|
|
addr *objectSDK.Address
|
|
}
|
|
|
|
// ExistsRes groups resulting values of Exists operation.
|
|
type ExistsRes struct {
|
|
ex bool
|
|
}
|
|
|
|
// WithAddress is an Exists option to set object checked for existence.
|
|
func (p *ExistsPrm) WithAddress(addr *objectSDK.Address) *ExistsPrm {
|
|
if p != nil {
|
|
p.addr = addr
|
|
}
|
|
|
|
return p
|
|
}
|
|
|
|
// Exists returns the fact that the object is in the storage engine.
|
|
func (p *ExistsRes) Exists() bool {
|
|
return p.ex
|
|
}
|
|
|
|
// Exists checks if object is presented in storage engine
|
|
//
|
|
// Returns any error encountered that does not allow to
|
|
// unambiguously determine the presence of an object.
|
|
func (e *StorageEngine) Exists(prm *ExistsPrm) (*ExistsRes, error) {
|
|
exists, err := e.exists(prm.addr)
|
|
|
|
return &ExistsRes{
|
|
ex: exists,
|
|
}, err
|
|
}
|
|
|
|
func (e *StorageEngine) exists(addr *objectSDK.Address) (bool, error) {
|
|
shPrm := new(shard.ExistsPrm).WithAddress(addr)
|
|
alreadyRemoved := false
|
|
exists := false
|
|
|
|
e.iterateOverSortedShards(addr, func(_ int, sh *shard.Shard) (stop bool) {
|
|
res, err := sh.Exists(shPrm)
|
|
if err != nil {
|
|
if errors.Is(err, object.ErrAlreadyRemoved) {
|
|
alreadyRemoved = true
|
|
|
|
return true
|
|
}
|
|
|
|
// TODO: smth wrong with shard, need to be processed
|
|
e.log.Warn("could not check existence of object in shard",
|
|
zap.Stringer("shard", sh.ID()),
|
|
zap.String("error", err.Error()),
|
|
)
|
|
}
|
|
|
|
if res != nil && !exists {
|
|
exists = res.Exists()
|
|
}
|
|
|
|
return false
|
|
})
|
|
|
|
if alreadyRemoved {
|
|
return false, object.ErrAlreadyRemoved
|
|
}
|
|
|
|
return exists, nil
|
|
}
|