e478c0d024
Accoring to MetaBase-Plan-B storage engine specification. Signed-off-by: Alex Vanin <alexey@nspcc.ru>
57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
package meta
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import (
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objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
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"github.com/nspcc-dev/neofs-node/pkg/core/object"
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"go.etcd.io/bbolt"
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)
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// Get returns object header for specified address.
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func (db *DB) Get(addr *objectSDK.Address) (obj *object.Object, err error) {
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err = db.boltDB.View(func(tx *bbolt.Tx) error {
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obj, err = db.get(tx, addr)
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return err
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})
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return obj, err
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}
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func (db *DB) get(tx *bbolt.Tx, addr *objectSDK.Address) (obj *object.Object, err error) {
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obj = object.New()
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key := objectKey(addr.ObjectID())
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cid := addr.ContainerID()
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if inGraveyard(tx, addr) {
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return nil, ErrAlreadyRemoved
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}
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// check in primary index
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data := getFromBucket(tx, primaryBucketName(cid), key)
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if len(data) != 0 {
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return obj, obj.Unmarshal(data)
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}
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// if not found then check in tombstone index
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data = getFromBucket(tx, tombstoneBucketName(cid), key)
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if len(data) != 0 {
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return obj, obj.Unmarshal(data)
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}
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// if not found then check in storage group index
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data = getFromBucket(tx, storageGroupBucketName(cid), key)
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if len(data) != 0 {
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return obj, obj.Unmarshal(data)
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}
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return nil, ErrNotFound
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}
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func getFromBucket(tx *bbolt.Tx, name, key []byte) []byte {
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bkt := tx.Bucket(name)
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if bkt == nil {
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return nil
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}
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return bkt.Get(key)
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}
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