43 lines
1 KiB
Go
43 lines
1 KiB
Go
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package writecache
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import (
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"errors"
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"fmt"
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"github.com/nspcc-dev/neofs-api-go/pkg/object"
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"go.etcd.io/bbolt"
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)
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// ErrNoDefaultBucket is returned by IterateDB when default bucket for objects is missing.
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var ErrNoDefaultBucket = errors.New("no default bucket")
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// IterateDB iterates over all objects stored in bbolt.DB instance and passes them to f until error return.
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// It is assumed that db is an underlying database of some WriteCache instance.
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//
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// Returns ErrNoDefaultBucket if there is no default bucket in db.
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//
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// DB must not be nil and should be opened.
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func IterateDB(db *bbolt.DB, f func(*object.Address) error) error {
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return db.View(func(tx *bbolt.Tx) error {
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b := tx.Bucket(defaultBucket)
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if b == nil {
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return ErrNoDefaultBucket
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}
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var addr *object.Address
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return b.ForEach(func(k, v []byte) error {
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if addr == nil {
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addr = object.NewAddress()
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}
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err := addr.Parse(string(k))
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if err != nil {
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return fmt.Errorf("could not parse object address: %w", err)
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}
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return f(addr)
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})
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})
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}
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