69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package goleveldb
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import (
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"github.com/blevesearch/bleve/index/store"
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"github.com/syndtr/goleveldb/leveldb"
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"github.com/syndtr/goleveldb/leveldb/util"
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)
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type Reader struct {
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store *Store
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snapshot *leveldb.Snapshot
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}
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func (r *Reader) Get(key []byte) ([]byte, error) {
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b, err := r.snapshot.Get(key, r.store.defaultReadOptions)
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if err == leveldb.ErrNotFound {
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return nil, nil
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}
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return b, err
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}
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func (r *Reader) MultiGet(keys [][]byte) ([][]byte, error) {
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return store.MultiGet(r, keys)
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}
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func (r *Reader) PrefixIterator(prefix []byte) store.KVIterator {
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byteRange := util.BytesPrefix(prefix)
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iter := r.snapshot.NewIterator(byteRange, r.store.defaultReadOptions)
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iter.First()
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rv := Iterator{
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store: r.store,
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iterator: iter,
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}
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return &rv
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}
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func (r *Reader) RangeIterator(start, end []byte) store.KVIterator {
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byteRange := &util.Range{
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Start: start,
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Limit: end,
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}
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iter := r.snapshot.NewIterator(byteRange, r.store.defaultReadOptions)
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iter.First()
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rv := Iterator{
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store: r.store,
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iterator: iter,
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}
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return &rv
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}
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func (r *Reader) Close() error {
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r.snapshot.Release()
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return nil
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}
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