107 lines
2 KiB
Go
107 lines
2 KiB
Go
package fsbucket
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import (
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"io/ioutil"
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"os"
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"path"
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"path/filepath"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/bucket"
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)
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// Get value by key.
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func (b *Bucket) Get(key []byte) ([]byte, error) {
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p := path.Join(b.dir, stringifyKey(key))
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if _, err := os.Stat(p); os.IsNotExist(err) {
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return nil, bucket.ErrNotFound
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}
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return ioutil.ReadFile(p)
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}
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// Set value by key.
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func (b *Bucket) Set(key, value []byte) error {
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p := path.Join(b.dir, stringifyKey(key))
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return ioutil.WriteFile(p, value, b.perm)
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}
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// Del value by key.
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func (b *Bucket) Del(key []byte) error {
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p := path.Join(b.dir, stringifyKey(key))
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if _, err := os.Stat(p); os.IsNotExist(err) {
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return bucket.ErrNotFound
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}
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return os.Remove(p)
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}
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// Has checks key exists.
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func (b *Bucket) Has(key []byte) bool {
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p := path.Join(b.dir, stringifyKey(key))
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_, err := os.Stat(p)
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return err == nil
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}
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func listing(root string, fn func(path string, info os.FileInfo) error) error {
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return filepath.Walk(root, func(p string, info os.FileInfo, err error) error {
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if err != nil || info.IsDir() {
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return err
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}
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if fn == nil {
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return nil
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}
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return fn(p, info)
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})
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}
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// Size of bucket.
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func (b *Bucket) Size() (size int64) {
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err := listing(b.dir, func(_ string, info os.FileInfo) error {
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size += info.Size()
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return nil
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})
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if err != nil {
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size = 0
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}
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return
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}
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// List all bucket items.
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func (b *Bucket) List() ([][]byte, error) {
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buckets := make([][]byte, 0)
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err := listing(b.dir, func(p string, info os.FileInfo) error {
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buckets = append(buckets, decodeKey(info.Name()))
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return nil
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})
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return buckets, err
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}
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// Filter bucket items by closure.
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func (b *Bucket) Iterate(handler bucket.FilterHandler) error {
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return listing(b.dir, func(p string, info os.FileInfo) error {
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key := decodeKey(info.Name())
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val, err := ioutil.ReadFile(p)
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if err != nil {
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return err
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}
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if !handler(key, val) {
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return bucket.ErrIteratingAborted
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}
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return nil
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})
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}
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// Close bucket (just empty).
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func (b *Bucket) Close() error {
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return os.RemoveAll(b.dir)
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}
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