package blobovnicza import ( "errors" apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status" oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id" "github.com/nspcc-dev/neo-go/pkg/util/slice" "go.etcd.io/bbolt" ) // GetPrm groups the parameters of Get operation. type GetPrm struct { addr oid.Address } // GetRes groups the resulting values of Get operation. type GetRes struct { obj []byte } // SetAddress sets the address of the requested object. func (p *GetPrm) SetAddress(addr oid.Address) { p.addr = addr } // Object returns binary representation of the requested object. func (p GetRes) Object() []byte { return p.obj } // special error for normal bbolt.Tx.ForEach interruption. var errInterruptForEach = errors.New("interrupt for-each") // Get reads an object from Blobovnicza by address. // // Returns any error encountered that // did not allow to completely read the object. // // Returns an error of type apistatus.ObjectNotFound if the requested object is not // presented in Blobovnicza. func (b *Blobovnicza) Get(prm GetPrm) (GetRes, error) { var ( data []byte addrKey = addressKey(prm.addr) ) if err := b.boltDB.View(func(tx *bbolt.Tx) error { return tx.ForEach(func(_ []byte, buck *bbolt.Bucket) error { data = buck.Get(addrKey) if data == nil { return nil } data = slice.Copy(data) return errInterruptForEach }) }); err != nil && err != errInterruptForEach { return GetRes{}, err } if data == nil { var errNotFound apistatus.ObjectNotFound return GetRes{}, errNotFound } return GetRes{ obj: data, }, nil }