// Copyright (c) 2014 Couchbase, Inc. // // 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 goleveldb import ( "github.com/blevesearch/bleve/index/store" "github.com/syndtr/goleveldb/leveldb" "github.com/syndtr/goleveldb/leveldb/util" ) type Reader struct { store *Store snapshot *leveldb.Snapshot } func (r *Reader) Get(key []byte) ([]byte, error) { b, err := r.snapshot.Get(key, r.store.defaultReadOptions) if err == leveldb.ErrNotFound { return nil, nil } return b, err } func (r *Reader) MultiGet(keys [][]byte) ([][]byte, error) { return store.MultiGet(r, keys) } func (r *Reader) PrefixIterator(prefix []byte) store.KVIterator { byteRange := util.BytesPrefix(prefix) iter := r.snapshot.NewIterator(byteRange, r.store.defaultReadOptions) iter.First() rv := Iterator{ store: r.store, iterator: iter, } return &rv } func (r *Reader) RangeIterator(start, end []byte) store.KVIterator { byteRange := &util.Range{ Start: start, Limit: end, } iter := r.snapshot.NewIterator(byteRange, r.store.defaultReadOptions) iter.First() rv := Iterator{ store: r.store, iterator: iter, } return &rv } func (r *Reader) Close() error { r.snapshot.Release() return nil }