c7443fe52b
more things can return error now in a couple of places we had to swallow errors because they didn't fit the existing API. in these case and proactively in a few others we now return error as well. also the batch API has been updated to allow performing set/delete internal within the batch
129 lines
2.7 KiB
Go
129 lines
2.7 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
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import (
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"fmt"
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"sync"
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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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writer sync.Mutex
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}
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func Open(path string, bucket string) (*Store, error) {
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rv := Store{
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path: path,
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bucket: bucket,
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}
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var err error
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rv.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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err = rv.db.Update(func(tx *bolt.Tx) error {
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_, err := tx.CreateBucketIfNotExists([]byte(rv.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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return &rv, nil
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}
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func (bs *Store) get(key []byte) ([]byte, error) {
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var rv []byte
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err := bs.db.View(func(tx *bolt.Tx) error {
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rv = tx.Bucket([]byte(bs.bucket)).Get(key)
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return nil
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})
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return rv, err
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}
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func (bs *Store) set(key, val []byte) error {
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bs.writer.Lock()
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defer bs.writer.Unlock()
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return bs.setlocked(key, val)
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}
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func (bs *Store) setlocked(key, val []byte) error {
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return bs.db.Update(func(tx *bolt.Tx) error {
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return tx.Bucket([]byte(bs.bucket)).Put(key, val)
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})
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}
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func (bs *Store) delete(key []byte) error {
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bs.writer.Lock()
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defer bs.writer.Unlock()
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return bs.deletelocked(key)
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}
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func (bs *Store) deletelocked(key []byte) error {
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return bs.db.Update(func(tx *bolt.Tx) error {
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return tx.Bucket([]byte(bs.bucket)).Delete(key)
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})
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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) iterator(key []byte) store.KVIterator {
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rv := newIterator(bs)
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rv.Seek(key)
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return rv
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}
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func (bs *Store) Reader() (store.KVReader, error) {
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return newReader(bs)
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}
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func (bs *Store) Writer() (store.KVWriter, error) {
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return newWriter(bs)
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}
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func (bs *Store) newBatch() store.KVBatch {
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return newBatch(bs)
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}
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func StoreConstructor(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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return Open(path, bucket)
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}
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func init() {
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registry.RegisterKVStore(Name, StoreConstructor)
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}
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