108 lines
2.4 KiB
Go
108 lines
2.4 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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// Package boltdb implements a store.KVStore on top of BoltDB. It supports the
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// following options:
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//
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// "bucket" (string): the name of BoltDB bucket to use, defaults to "bleve".
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//
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// "nosync" (bool): if true, set boltdb.DB.NoSync to true. It speeds up index
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// operations in exchange of losing integrity guarantees if indexation aborts
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// without closing the index. Use it when rebuilding indexes from zero.
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package boltdb
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import (
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"encoding/json"
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"fmt"
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"github.com/blevesearch/bleve/index/store"
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"github.com/blevesearch/bleve/registry"
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"github.com/boltdb/bolt"
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)
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const Name = "boltdb"
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type Store struct {
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path string
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bucket string
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db *bolt.DB
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noSync bool
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mo store.MergeOperator
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}
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func New(mo store.MergeOperator, config map[string]interface{}) (store.KVStore, error) {
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path, ok := config["path"].(string)
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if !ok {
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return nil, fmt.Errorf("must specify path")
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}
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bucket, ok := config["bucket"].(string)
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if !ok {
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bucket = "bleve"
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}
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noSync, _ := config["nosync"].(bool)
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db, err := bolt.Open(path, 0600, nil)
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if err != nil {
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return nil, err
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}
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db.NoSync = noSync
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err = db.Update(func(tx *bolt.Tx) error {
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_, err := tx.CreateBucketIfNotExists([]byte(bucket))
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return err
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})
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if err != nil {
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return nil, err
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}
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rv := Store{
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path: path,
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bucket: bucket,
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db: db,
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mo: mo,
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noSync: noSync,
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}
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return &rv, nil
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}
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func (bs *Store) Close() error {
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return bs.db.Close()
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}
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func (bs *Store) Reader() (store.KVReader, error) {
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tx, err := bs.db.Begin(false)
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if err != nil {
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return nil, err
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}
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return &Reader{
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store: bs,
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tx: tx,
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bucket: tx.Bucket([]byte(bs.bucket)),
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}, nil
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}
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func (bs *Store) Writer() (store.KVWriter, error) {
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return &Writer{
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store: bs,
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}, nil
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}
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func (bs *Store) Stats() json.Marshaler {
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return &stats{
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s: bs,
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}
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}
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func init() {
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registry.RegisterKVStore(Name, New)
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}
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