101 lines
2.4 KiB
Go
101 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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// +build leveldb full
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package leveldb
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import (
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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/jmhodges/levigo"
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)
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const Name = "leveldb"
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type LevelDBStore struct {
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path string
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opts *levigo.Options
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db *levigo.DB
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}
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func Open(path string, createIfMissing bool, errorIfExists bool) (*LevelDBStore, error) {
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rv := LevelDBStore{
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path: path,
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}
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opts := levigo.NewOptions()
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opts.SetCreateIfMissing(createIfMissing)
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opts.SetErrorIfExists(errorIfExists)
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rv.opts = opts
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var err error
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rv.db, err = levigo.Open(rv.path, rv.opts)
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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 (ldbs *LevelDBStore) Get(key []byte) ([]byte, error) {
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return ldbs.db.Get(defaultReadOptions(), key)
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}
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func (ldbs *LevelDBStore) Set(key, val []byte) error {
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return ldbs.db.Put(defaultWriteOptions(), key, val)
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}
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func (ldbs *LevelDBStore) Delete(key []byte) error {
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return ldbs.db.Delete(defaultWriteOptions(), key)
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}
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func (ldbs *LevelDBStore) Commit() error {
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return nil
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}
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func (ldbs *LevelDBStore) Close() error {
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ldbs.db.Close()
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return nil
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}
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func (ldbs *LevelDBStore) Iterator(key []byte) store.KVIterator {
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rv := newLevelDBIterator(ldbs)
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rv.Seek(key)
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return rv
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}
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func (ldbs *LevelDBStore) NewBatch() store.KVBatch {
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return newLevelDBBatch(ldbs)
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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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createIfMissing := false
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cim, ok := config["create_if_missing"].(bool)
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if ok {
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createIfMissing = cim
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}
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errorIfExists := true
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eie, ok := config["error_if_exists"].(bool)
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if ok {
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errorIfExists = eie
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}
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return Open(path, createIfMissing, errorIfExists)
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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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