101 lines
1.8 KiB
Go
101 lines
1.8 KiB
Go
package fsbucket
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import (
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"os"
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"github.com/mr-tron/base58"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/bucket"
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"github.com/pkg/errors"
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"github.com/spf13/viper"
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"go.uber.org/atomic"
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)
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type (
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Bucket struct {
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dir string
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perm os.FileMode
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}
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treeBucket struct {
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dir string
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perm os.FileMode
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depth int
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prefixLength int
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sz *atomic.Int64
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}
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)
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const Name = "filesystem"
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const (
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defaultDirectory = "fsbucket"
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defaultPermissions = 0755
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defaultDepth = 2
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defaultPrefixLen = 2
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)
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var errShortKey = errors.New("key is too short for tree fs bucket")
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func stringifyKey(key []byte) string {
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return base58.Encode(key)
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}
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func decodeKey(key string) []byte {
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k, err := base58.Decode(key)
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if err != nil {
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panic(err) // it can fail only for not base58 strings
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}
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return k
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}
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// NewBucket creates new file system bucket instance.
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func NewBucket(prefix string, v *viper.Viper) (bucket.Bucket, error) {
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prefix = prefix + "." + Name
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var (
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dir string
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perm os.FileMode
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prefixLen int
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depth int
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)
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if dir = v.GetString(prefix + ".directory"); dir == "" {
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dir = defaultDirectory
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}
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if perm = os.FileMode(v.GetInt(prefix + ".permissions")); perm == 0 {
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perm = defaultPermissions
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}
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if depth = v.GetInt(prefix + ".depth"); depth <= 0 {
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depth = defaultDepth
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}
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if prefixLen = v.GetInt(prefix + ".prefix_len"); prefixLen <= 0 {
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prefixLen = defaultPrefixLen
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}
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if err := os.MkdirAll(dir, perm); err != nil {
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return nil, errors.Wrapf(err, "could not create bucket %s", Name)
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}
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if v.GetBool(prefix + ".tree_enabled") {
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b := &treeBucket{
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dir: dir,
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perm: perm,
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depth: depth,
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prefixLength: prefixLen,
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}
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b.sz = atomic.NewInt64(b.size())
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return b, nil
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}
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return &Bucket{
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dir: dir,
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perm: perm,
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}, nil
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}
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