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add more storage for metadata (#207)
* add more storage for metadata * fix pebble storage
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| /* Copyright 2022 Zinc Labs Inc. and Contributors | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package bolt | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "os" | ||
| "path" | ||
|
|
||
| "github.com/rs/zerolog/log" | ||
| "go.etcd.io/bbolt" | ||
|
|
||
| "github.com/zinclabs/zinc/pkg/config" | ||
| "github.com/zinclabs/zinc/pkg/errors" | ||
| "github.com/zinclabs/zinc/pkg/metadata/storage" | ||
| ) | ||
|
|
||
| type boltStorage struct { | ||
| db *bbolt.DB | ||
| } | ||
|
|
||
| func New(dbpath string) storage.Storager { | ||
| db, err := openbboltDB(path.Join(config.Global.DataPath, dbpath), false) | ||
| if err != nil { | ||
| log.Fatal().Err(err).Msg("open bbolt db for metadata failed") | ||
| } | ||
| return &boltStorage{db} | ||
| } | ||
|
|
||
| func openbboltDB(dbpath string, readOnly bool) (*bbolt.DB, error) { | ||
| opt := &bbolt.Options{ | ||
| Timeout: 0, | ||
| NoGrowSync: false, | ||
| FreelistType: bbolt.FreelistArrayType, | ||
| } | ||
| if err := os.MkdirAll(path.Dir(dbpath), 0755); err != nil { | ||
| return nil, err | ||
| } | ||
| return bbolt.Open(dbpath, 0666, opt) | ||
| } | ||
|
|
||
| func (t *boltStorage) List(prefix string, _, _ int) ([][]byte, error) { | ||
| data := make([][]byte, 0) | ||
| bucket, _ := t.splitBucketAndKey(prefix) | ||
| err := t.db.View(func(txn *bbolt.Tx) error { | ||
| b := txn.Bucket(bucket) | ||
| if b == nil { | ||
| return nil | ||
| } | ||
| c := b.Cursor() | ||
| for k, v := c.First(); k != nil; k, v = c.Next() { | ||
| valCopy := make([]byte, len(v)) | ||
| copy(valCopy, v) | ||
| data = append(data, valCopy) | ||
| } | ||
| return nil | ||
| }) | ||
| return data, err | ||
| } | ||
|
|
||
| func (t *boltStorage) Get(key string) ([]byte, error) { | ||
| var data []byte | ||
| bucket, name := t.splitBucketAndKey(key) | ||
| err := t.db.View(func(txn *bbolt.Tx) error { | ||
| b := txn.Bucket(bucket) | ||
| if b == nil { | ||
| return errors.ErrKeyNotFound | ||
| } | ||
| v := b.Get(name) | ||
| if v == nil { | ||
| return errors.ErrKeyNotFound | ||
| } | ||
| data = make([]byte, len(v)) | ||
| copy(data, v) | ||
| return nil | ||
| }) | ||
| return data, err | ||
| } | ||
|
|
||
| func (t *boltStorage) Set(key string, value []byte) error { | ||
| if key == "" { | ||
| return errors.ErrEmptyKey | ||
| } | ||
| bucket, name := t.splitBucketAndKey(key) | ||
| return t.db.Update(func(txn *bbolt.Tx) error { | ||
| b, err := txn.CreateBucketIfNotExists(bucket) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return b.Put(name, value) | ||
| }) | ||
| } | ||
|
|
||
| func (t *boltStorage) Delete(key string) error { | ||
| if key == "" { | ||
| return errors.ErrEmptyKey | ||
| } | ||
| bucket, name := t.splitBucketAndKey(key) | ||
| return t.db.Update(func(Tx *bbolt.Tx) error { | ||
| b := Tx.Bucket(bucket) | ||
| if b == nil { | ||
| return nil | ||
| } | ||
| return b.Delete(name) | ||
| }) | ||
| } | ||
|
|
||
| func (t *boltStorage) Close() error { | ||
| return t.db.Close() | ||
| } | ||
|
|
||
| func (t *boltStorage) splitBucketAndKey(key string) ([]byte, []byte) { | ||
| if key == "" { | ||
| return nil, nil | ||
| } | ||
| p := bytes.LastIndex([]byte(key), []byte("/")) | ||
| return []byte(key[:p]), []byte(key[p+1:]) | ||
| } |
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