160 lines
3.3 KiB
Go
160 lines
3.3 KiB
Go
package object
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
|
|
lock "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/lock/grpc"
|
|
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/refs"
|
|
refsGRPC "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/refs/grpc"
|
|
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc/grpc"
|
|
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/rpc/message"
|
|
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/util/proto"
|
|
)
|
|
|
|
// Lock represents object Lock message from NeoFS API V2 protocol.
|
|
type Lock struct {
|
|
members []refs.ObjectID
|
|
}
|
|
|
|
// NumberOfMembers returns length of lock list.
|
|
func (x *Lock) NumberOfMembers() int {
|
|
if x != nil {
|
|
return len(x.members)
|
|
}
|
|
|
|
return 0
|
|
}
|
|
|
|
// IterateMembers passes members of the lock list to f.
|
|
func (x *Lock) IterateMembers(f func(refs.ObjectID)) {
|
|
if x != nil {
|
|
for i := range x.members {
|
|
f(x.members[i])
|
|
}
|
|
}
|
|
}
|
|
|
|
// SetMembers sets list of locked members.
|
|
// Arg must not be mutated for the duration of the Lock.
|
|
func (x *Lock) SetMembers(ids []refs.ObjectID) {
|
|
x.members = ids
|
|
}
|
|
|
|
const (
|
|
_ = iota
|
|
fNumLockMembers
|
|
)
|
|
|
|
// StableMarshal encodes the Lock into Protocol Buffers binary format
|
|
// with direct field order.
|
|
func (x *Lock) StableMarshal(buf []byte) []byte {
|
|
if x == nil || len(x.members) == 0 {
|
|
return []byte{}
|
|
}
|
|
|
|
if buf == nil {
|
|
buf = make([]byte, x.StableSize())
|
|
}
|
|
|
|
var offset int
|
|
|
|
for i := range x.members {
|
|
offset += proto.NestedStructureMarshal(fNumLockMembers, buf[offset:], &x.members[i])
|
|
}
|
|
|
|
return buf
|
|
}
|
|
|
|
// StableSize size of the buffer required to write the Lock in Protocol Buffers
|
|
// binary format.
|
|
func (x *Lock) StableSize() (sz int) {
|
|
if x != nil {
|
|
for i := range x.members {
|
|
sz += proto.NestedStructureSize(fNumLockMembers, &x.members[i])
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// Unmarshal decodes the Lock from its Protocol Buffers binary format.
|
|
func (x *Lock) Unmarshal(data []byte) error {
|
|
return message.Unmarshal(x, data, new(lock.Lock))
|
|
}
|
|
|
|
func (x *Lock) ToGRPCMessage() grpc.Message {
|
|
var m *lock.Lock
|
|
|
|
if x != nil {
|
|
m = new(lock.Lock)
|
|
|
|
var members []refsGRPC.ObjectID
|
|
|
|
if x.members != nil {
|
|
members = make([]refsGRPC.ObjectID, len(x.members))
|
|
|
|
for i := range x.members {
|
|
members[i] = *x.members[i].ToGRPCMessage().(*refsGRPC.ObjectID)
|
|
}
|
|
}
|
|
|
|
m.SetMembers(members)
|
|
}
|
|
|
|
return m
|
|
}
|
|
|
|
func (x *Lock) FromGRPCMessage(m grpc.Message) error {
|
|
v, ok := m.(*lock.Lock)
|
|
if !ok {
|
|
return message.NewUnexpectedMessageType(m, v)
|
|
}
|
|
|
|
members := v.GetMembers()
|
|
if members == nil {
|
|
x.members = nil
|
|
} else {
|
|
x.members = make([]refs.ObjectID, len(members))
|
|
var err error
|
|
|
|
for i := range x.members {
|
|
err = x.members[i].FromGRPCMessage(&members[i])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// WriteLock writes Lock to the Object as a payload content.
|
|
// The object must not be nil.
|
|
func WriteLock(obj *Object, lock Lock) {
|
|
hdr := obj.GetHeader()
|
|
if hdr == nil {
|
|
hdr = new(Header)
|
|
obj.SetHeader(hdr)
|
|
}
|
|
|
|
hdr.SetObjectType(TypeLock)
|
|
|
|
payload := lock.StableMarshal(nil)
|
|
obj.SetPayload(payload)
|
|
}
|
|
|
|
// ReadLock reads Lock from the Object payload content.
|
|
func ReadLock(lock *Lock, obj Object) error {
|
|
payload := obj.GetPayload()
|
|
if len(payload) == 0 {
|
|
return errors.New("empty payload")
|
|
}
|
|
|
|
err := lock.Unmarshal(payload)
|
|
if err != nil {
|
|
return fmt.Errorf("decode lock content from payload: %w", err)
|
|
}
|
|
|
|
return nil
|
|
}
|