rss-tools/app/bucket.go (view raw)
| 1 | package app |
| 2 | |
| 3 | import "go.etcd.io/bbolt" |
| 4 | |
| 5 | type Bucket struct { |
| 6 | db *bbolt.DB |
| 7 | name []byte |
| 8 | } |
| 9 | |
| 10 | func (a *App) Bucket(name string) (*Bucket, error) { |
| 11 | b := &Bucket{db: a.db, name: []byte(name)} |
| 12 | return b, a.db.Update(func(tx *bbolt.Tx) error { |
| 13 | _, err := tx.CreateBucketIfNotExists(b.name) |
| 14 | return err |
| 15 | }) |
| 16 | } |
| 17 | |
| 18 | func (b *Bucket) Get(key []byte) ([]byte, error) { |
| 19 | var v []byte |
| 20 | err := b.db.View(func(tx *bbolt.Tx) error { |
| 21 | v = tx.Bucket(b.name).Get(key) |
| 22 | return nil |
| 23 | }) |
| 24 | return v, err |
| 25 | } |
| 26 | |
| 27 | func (b *Bucket) Set(key, val []byte) error { |
| 28 | return b.db.Update(func(tx *bbolt.Tx) error { |
| 29 | return tx.Bucket(b.name).Put(key, val) |
| 30 | }) |
| 31 | } |
| 32 | |
| 33 | func (b *Bucket) Delete(key []byte) error { |
| 34 | return b.db.Update(func(tx *bbolt.Tx) error { |
| 35 | return tx.Bucket(b.name).Delete(key) |
| 36 | }) |
| 37 | } |
| 38 | |
| 39 | func (b *Bucket) ForEach(fn func(k, v []byte) error) error { |
| 40 | return b.db.View(func(tx *bbolt.Tx) error { |
| 41 | return tx.Bucket(b.name).ForEach(fn) |
| 42 | }) |
| 43 | } |