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add bbolt #300
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add bbolt #300
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,245 @@ | ||
| // 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| /** | ||
| * Copyright (c) 2010-2016 Yahoo! Inc., 2017 YCSB contributors All rights reserved. | ||
| * <p> | ||
| * 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 | ||
| * <p> | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * <p> | ||
| * 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. See accompanying | ||
| * LICENSE file. | ||
| */ | ||
|
|
||
| package boltdb | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/magiconair/properties" | ||
| "github.com/pingcap/go-ycsb/pkg/prop" | ||
| "github.com/pingcap/go-ycsb/pkg/util" | ||
| "github.com/pingcap/go-ycsb/pkg/ycsb" | ||
| "go.etcd.io/bbolt" | ||
| "os" | ||
| ) | ||
|
|
||
| // properties | ||
| const ( | ||
| bboltPath = "bbolt.path" | ||
| bboltTimeout = "bbolt.timeout" | ||
| bboltNoGrowSync = "bbolt.no_grow_sync" | ||
| bboltReadOnly = "bbolt.read_only" | ||
| bboltMmapFlags = "bbolt.mmap_flags" | ||
| bboltInitialMmapSize = "bbolt.initial_mmap_size" | ||
| bboltFreelistType = "bbolt.freelist_type" | ||
| ) | ||
|
|
||
| type bboltCreator struct { | ||
| } | ||
|
|
||
| type bboltOptions struct { | ||
| Path string | ||
| FileMode os.FileMode | ||
| DBOptions *bbolt.Options | ||
| } | ||
|
|
||
| type bboltDB struct { | ||
| p *properties.Properties | ||
|
|
||
| db *bbolt.DB | ||
|
|
||
| r *util.RowCodec | ||
| bufPool *util.BufPool | ||
| } | ||
|
|
||
| func (c bboltCreator) Create(p *properties.Properties) (ycsb.DB, error) { | ||
| opts := getOptions(p) | ||
|
|
||
| if p.GetBool(prop.DropData, prop.DropDataDefault) { | ||
| os.RemoveAll(opts.Path) | ||
| } | ||
|
|
||
| db, err := bbolt.Open(opts.Path, opts.FileMode, opts.DBOptions) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &bboltDB{ | ||
| p: p, | ||
| db: db, | ||
| r: util.NewRowCodec(p), | ||
| bufPool: util.NewBufPool(), | ||
| }, nil | ||
| } | ||
|
|
||
| func getOptions(p *properties.Properties) bboltOptions { | ||
| path := p.GetString(bboltPath, "/tmp/bbolt") | ||
|
|
||
| opts := bbolt.DefaultOptions | ||
| opts.Timeout = p.GetDuration(bboltTimeout, 0) | ||
| opts.NoGrowSync = p.GetBool(bboltNoGrowSync, false) | ||
| opts.ReadOnly = p.GetBool(bboltReadOnly, false) | ||
| opts.MmapFlags = p.GetInt(bboltMmapFlags, 0) | ||
| opts.InitialMmapSize = p.GetInt(bboltInitialMmapSize, 0) | ||
| opts.FreelistType = bbolt.FreelistType(p.GetString(bboltFreelistType, string(bbolt.FreelistArrayType))) | ||
|
|
||
| return bboltOptions{ | ||
| Path: path, | ||
| FileMode: 0600, | ||
| DBOptions: opts, | ||
| } | ||
| } | ||
|
|
||
| func (db *bboltDB) Close() error { | ||
| return db.db.Close() | ||
| } | ||
|
|
||
| func (db *bboltDB) InitThread(ctx context.Context, _ int, _ int) context.Context { | ||
| return ctx | ||
| } | ||
|
|
||
| func (db *bboltDB) CleanupThread(_ context.Context) { | ||
| } | ||
|
|
||
| func (db *bboltDB) Read(ctx context.Context, table string, key string, fields []string) (map[string][]byte, error) { | ||
| var m map[string][]byte | ||
| err := db.db.View(func(tx *bbolt.Tx) error { | ||
| bucket := tx.Bucket([]byte(table)) | ||
| if bucket == nil { | ||
| return fmt.Errorf("table not found: %s", table) | ||
| } | ||
|
|
||
| row := bucket.Get([]byte(key)) | ||
| if row == nil { | ||
| return fmt.Errorf("key not found: %s.%s", table, key) | ||
| } | ||
|
|
||
| var err error | ||
| m, err = db.r.Decode(row, fields) | ||
| return err | ||
| }) | ||
| return m, err | ||
| } | ||
|
|
||
| func (db *bboltDB) Scan(ctx context.Context, table string, startKey string, count int, fields []string) ([]map[string][]byte, error) { | ||
| res := make([]map[string][]byte, count) | ||
| err := db.db.View(func(tx *bbolt.Tx) error { | ||
| bucket := tx.Bucket([]byte(table)) | ||
| if bucket == nil { | ||
| return fmt.Errorf("table not found: %s", table) | ||
| } | ||
|
|
||
| cursor := bucket.Cursor() | ||
| key, value := cursor.Seek([]byte(startKey)) | ||
| for i := 0; key != nil && i < count; i++ { | ||
| m, err := db.r.Decode(value, fields) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| res[i] = m | ||
| key, value = cursor.Next() | ||
| } | ||
|
|
||
| return nil | ||
| }) | ||
| return res, err | ||
| } | ||
|
|
||
| func (db *bboltDB) Update(ctx context.Context, table string, key string, values map[string][]byte) error { | ||
| err := db.db.Update(func(tx *bbolt.Tx) error { | ||
| bucket := tx.Bucket([]byte(table)) | ||
| if bucket == nil { | ||
| return fmt.Errorf("table not found: %s", table) | ||
| } | ||
|
|
||
| value := bucket.Get([]byte(key)) | ||
| if value == nil { | ||
| return fmt.Errorf("key not found: %s.%s", table, key) | ||
| } | ||
|
|
||
| data, err := db.r.Decode(value, nil) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| for field, value := range values { | ||
| data[field] = value | ||
| } | ||
|
|
||
| buf := db.bufPool.Get() | ||
| defer func() { | ||
| db.bufPool.Put(buf) | ||
| }() | ||
|
|
||
| buf, err = db.r.Encode(buf, data) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return bucket.Put([]byte(key), buf) | ||
| }) | ||
| return err | ||
| } | ||
|
|
||
| func (db *bboltDB) Insert(ctx context.Context, table string, key string, values map[string][]byte) error { | ||
| err := db.db.Update(func(tx *bbolt.Tx) error { | ||
| bucket, err := tx.CreateBucketIfNotExists([]byte(table)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| buf := db.bufPool.Get() | ||
| defer func() { | ||
| db.bufPool.Put(buf) | ||
| }() | ||
|
|
||
| buf, err = db.r.Encode(buf, values) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return bucket.Put([]byte(key), buf) | ||
| }) | ||
| return err | ||
| } | ||
|
|
||
| func (db *bboltDB) Delete(ctx context.Context, table string, key string) error { | ||
| err := db.db.Update(func(tx *bbolt.Tx) error { | ||
| bucket := tx.Bucket([]byte(table)) | ||
| if bucket == nil { | ||
| return nil | ||
| } | ||
|
|
||
| err := bucket.Delete([]byte(key)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if bucket.Stats().KeyN == 0 { | ||
| _ = tx.DeleteBucket([]byte(table)) | ||
| } | ||
| return nil | ||
| }) | ||
| return err | ||
| } | ||
|
|
||
| func init() { | ||
| ycsb.RegisterDBCreator("bbolt", bboltCreator{}) | ||
| } | ||
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All these operations (e.g. Decode, Encode, etc) have nothing to do with bbolt?