forked from TrueCloudLab/frostfs-node
8107c8d1a9
It allows storing information about object in both ways at the same time: 1. Metabase should know if an object is covered by a tombstone (that is not expired yet); 2. It should be possible to physically delete objects covered by a tombstone immediately (mark with GC) but keep tombstone knowledge. Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
97 lines
2.1 KiB
Go
97 lines
2.1 KiB
Go
package meta
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import (
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"errors"
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"fmt"
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addressSDK "github.com/nspcc-dev/neofs-sdk-go/object/address"
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"go.etcd.io/bbolt"
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)
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// DeletedObject represents descriptor of the object that was
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// marked to be deleted.
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type DeletedObject struct {
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addr *addressSDK.Address
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}
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// Address returns buried object address.
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func (g *DeletedObject) Address() *addressSDK.Address {
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return g.addr
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}
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// Handler is a DeletedObject handling function.
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type Handler func(*DeletedObject) error
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// IterateOverGarbage iterates over all objects
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// marked with GC mark.
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//
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// If h returns ErrInterruptIterator, nil returns immediately.
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// Returns other errors of h directly.
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func (db *DB) IterateOverGarbage(h Handler) error {
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return db.boltDB.View(func(tx *bbolt.Tx) error {
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return db.iterateDeletedObj(tx, withGC, h)
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})
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}
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// IterateOverGraveyard iterates over all graves in DB.
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//
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// If h returns ErrInterruptIterator, nil returns immediately.
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// Returns other errors of h directly.
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func (db *DB) IterateOverGraveyard(h Handler) error {
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return db.boltDB.View(func(tx *bbolt.Tx) error {
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return db.iterateDeletedObj(tx, grave, h)
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})
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}
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type deletedType uint8
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const (
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_ deletedType = iota
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grave
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withGC
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)
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func (db *DB) iterateDeletedObj(tx *bbolt.Tx, t deletedType, h Handler) error {
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var bkt *bbolt.Bucket
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switch t {
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case grave:
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bkt = tx.Bucket(graveyardBucketName)
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case withGC:
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bkt = tx.Bucket(garbageBucketName)
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default:
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panic(fmt.Sprintf("metabase: unknown iteration object type: %d", t))
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}
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if bkt == nil {
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return nil
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}
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// iterate over all deleted objects
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err := bkt.ForEach(func(k, v []byte) error {
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// parse deleted object
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delObj, err := deletedObjectFromKV(k, v)
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if err != nil {
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return fmt.Errorf("could not parse Grave: %w", err)
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}
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// handler object
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return h(delObj)
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})
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if errors.Is(err, ErrInterruptIterator) {
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err = nil
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}
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return err
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}
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func deletedObjectFromKV(k, _ []byte) (*DeletedObject, error) {
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addr, err := addressFromKey(k)
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if err != nil {
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return nil, fmt.Errorf("could not parse address: %w", err)
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}
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return &DeletedObject{
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addr: addr,
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}, nil
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}
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