forked from TrueCloudLab/frostfs-node
42 lines
1 KiB
Go
42 lines
1 KiB
Go
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package bucket
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import (
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"errors"
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)
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// FilterHandler where you receive key/val in your closure.
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type FilterHandler func(key, val []byte) bool
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// BucketItem used in filter.
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type BucketItem struct {
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Key []byte
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Val []byte
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}
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// Bucket is sub-store interface.
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type Bucket interface {
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Get(key []byte) ([]byte, error)
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Set(key, value []byte) error
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Del(key []byte) error
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Has(key []byte) bool
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Size() int64
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List() ([][]byte, error)
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Iterate(FilterHandler) error
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// Steam can be implemented by badger.Stream, but not for now
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// Stream(ctx context.Context, key []byte, cb func(io.ReadWriter) error) error
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Close() error
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}
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var (
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// ErrNilFilterHandler when FilterHandler is empty
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ErrNilFilterHandler = errors.New("handler can't be nil")
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// ErrNotFound is returned by key-value storage methods
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// that could not find element by key.
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ErrNotFound = errors.New("key not found")
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)
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// ErrIteratingAborted is returned by storage iterator
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// after iteration has been interrupted.
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var ErrIteratingAborted = errors.New("iteration aborted")
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