134 lines
3.1 KiB
Go
134 lines
3.1 KiB
Go
package meta
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import (
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"fmt"
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oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
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"go.etcd.io/bbolt"
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)
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// ToMoveItPrm groups the parameters of ToMoveIt operation.
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type ToMoveItPrm struct {
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addr oid.Address
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}
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// ToMoveItRes groups the resulting values of ToMoveIt operation.
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type ToMoveItRes struct{}
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// SetAddress sets address of the object to move into another shard.
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func (p *ToMoveItPrm) SetAddress(addr oid.Address) {
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p.addr = addr
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}
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// DoNotMovePrm groups the parameters of DoNotMove operation.
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type DoNotMovePrm struct {
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addr oid.Address
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}
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// DoNotMoveRes groups the resulting values of DoNotMove operation.
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type DoNotMoveRes struct{}
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// SetAddress sets address of the object to prevent moving into another shard.
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func (p *DoNotMovePrm) SetAddress(addr oid.Address) {
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p.addr = addr
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}
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// MovablePrm groups the parameters of Movable operation.
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type MovablePrm struct{}
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// MovableRes groups the resulting values of Movable operation.
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type MovableRes struct {
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addrList []oid.Address
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}
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// AddressList returns resulting addresses of Movable operation.
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func (p MovableRes) AddressList() []oid.Address {
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return p.addrList
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}
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// ToMoveIt marks objects to move it into another shard. This useful for
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// faster HRW fetching.
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func (db *DB) ToMoveIt(prm ToMoveItPrm) (res ToMoveItRes, err error) {
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db.modeMtx.RLock()
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defer db.modeMtx.RUnlock()
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if db.mode.NoMetabase() {
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return res, ErrDegradedMode
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} else if db.mode.ReadOnly() {
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return res, ErrReadOnlyMode
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}
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key := make([]byte, addressKeySize)
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key = addressKey(prm.addr, key)
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err = db.boltDB.Update(func(tx *bbolt.Tx) error {
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toMoveIt := tx.Bucket(toMoveItBucketName)
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return toMoveIt.Put(key, zeroValue)
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})
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return
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}
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// DoNotMove removes `MoveIt` mark from the object.
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func (db *DB) DoNotMove(prm DoNotMovePrm) (res DoNotMoveRes, err error) {
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db.modeMtx.RLock()
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defer db.modeMtx.RUnlock()
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if db.mode.NoMetabase() {
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return res, ErrDegradedMode
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} else if db.mode.ReadOnly() {
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return res, ErrReadOnlyMode
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}
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key := make([]byte, addressKeySize)
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key = addressKey(prm.addr, key)
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err = db.boltDB.Update(func(tx *bbolt.Tx) error {
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toMoveIt := tx.Bucket(toMoveItBucketName)
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return toMoveIt.Delete(key)
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})
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return
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}
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// Movable returns list of marked objects to move into other shard.
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func (db *DB) Movable(_ MovablePrm) (MovableRes, error) {
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db.modeMtx.RLock()
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defer db.modeMtx.RUnlock()
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if db.mode.NoMetabase() {
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return MovableRes{}, ErrDegradedMode
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}
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var strAddrs []string
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err := db.boltDB.View(func(tx *bbolt.Tx) error {
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toMoveIt := tx.Bucket(toMoveItBucketName)
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return toMoveIt.ForEach(func(k, v []byte) error {
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strAddrs = append(strAddrs, string(k))
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return nil
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})
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})
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if err != nil {
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return MovableRes{}, err
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}
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// we can parse strings to structures in-place, but probably it seems
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// more efficient to keep bolt db TX code smaller because it might be
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// bottleneck.
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addrs := make([]oid.Address, len(strAddrs))
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for i := range strAddrs {
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err = decodeAddressFromKey(&addrs[i], []byte(strAddrs[i]))
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if err != nil {
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return MovableRes{}, fmt.Errorf("can't parse object address %v: %w",
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strAddrs[i], err)
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}
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}
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return MovableRes{
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addrList: addrs,
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}, nil
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}
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