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
183 lines
3.4 KiB
Go
183 lines
3.4 KiB
Go
// 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 null
|
|
|
|
import (
|
|
"github.com/blevesearch/bleve/index/store"
|
|
)
|
|
|
|
type Store struct{}
|
|
|
|
func Open() (*Store, error) {
|
|
rv := Store{}
|
|
return &rv, nil
|
|
}
|
|
|
|
func (i *Store) Close() error {
|
|
return nil
|
|
}
|
|
|
|
func (i *Store) iterator(key []byte) store.KVIterator {
|
|
rv := newIterator(i)
|
|
return rv
|
|
}
|
|
|
|
func (i *Store) Reader() (store.KVReader, error) {
|
|
return newReader(i)
|
|
}
|
|
|
|
func (i *Store) Writer() (store.KVWriter, error) {
|
|
return newWriter(i)
|
|
}
|
|
|
|
func (i *Store) newBatch() store.KVBatch {
|
|
return newBatch(i)
|
|
}
|
|
|
|
type Reader struct {
|
|
store *Store
|
|
}
|
|
|
|
func newReader(store *Store) (*Reader, error) {
|
|
return &Reader{
|
|
store: store,
|
|
}, nil
|
|
}
|
|
|
|
func (r *Reader) Get(key []byte) ([]byte, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
func (r *Reader) Iterator(key []byte) store.KVIterator {
|
|
return r.store.iterator(key)
|
|
}
|
|
|
|
func (r *Reader) Close() error {
|
|
return nil
|
|
}
|
|
|
|
type Iterator struct {
|
|
store *Store
|
|
}
|
|
|
|
func newIterator(store *Store) *Iterator {
|
|
rv := Iterator{
|
|
store: store,
|
|
}
|
|
return &rv
|
|
}
|
|
|
|
func (i *Iterator) SeekFirst() {}
|
|
|
|
func (i *Iterator) Seek(k []byte) {}
|
|
|
|
func (i *Iterator) Next() {}
|
|
|
|
func (i *Iterator) Current() ([]byte, []byte, bool) {
|
|
return nil, nil, false
|
|
}
|
|
|
|
func (i *Iterator) Key() []byte {
|
|
return nil
|
|
}
|
|
|
|
func (i *Iterator) Value() []byte {
|
|
return nil
|
|
}
|
|
|
|
func (i *Iterator) Valid() bool {
|
|
return false
|
|
}
|
|
|
|
func (i *Iterator) Close() error {
|
|
return nil
|
|
}
|
|
|
|
type Batch struct {
|
|
store *Store
|
|
keys [][]byte
|
|
vals [][]byte
|
|
merges map[string]store.AssociativeMergeChain
|
|
}
|
|
|
|
func newBatch(s *Store) *Batch {
|
|
rv := Batch{
|
|
store: s,
|
|
keys: make([][]byte, 0),
|
|
vals: make([][]byte, 0),
|
|
merges: make(map[string]store.AssociativeMergeChain),
|
|
}
|
|
return &rv
|
|
}
|
|
|
|
func (i *Batch) Set(key, val []byte) {
|
|
i.keys = append(i.keys, key)
|
|
i.vals = append(i.vals, val)
|
|
}
|
|
|
|
func (i *Batch) Delete(key []byte) {
|
|
i.keys = append(i.keys, key)
|
|
i.vals = append(i.vals, nil)
|
|
}
|
|
|
|
func (i *Batch) Merge(key []byte, oper store.AssociativeMerge) {
|
|
opers, ok := i.merges[string(key)]
|
|
if !ok {
|
|
opers = make(store.AssociativeMergeChain, 0, 1)
|
|
}
|
|
opers = append(opers, oper)
|
|
i.merges[string(key)] = opers
|
|
}
|
|
|
|
func (i *Batch) Execute() error {
|
|
return nil
|
|
}
|
|
|
|
func (i *Batch) Close() error {
|
|
return nil
|
|
}
|
|
|
|
type Writer struct {
|
|
store *Store
|
|
}
|
|
|
|
func newWriter(store *Store) (*Writer, error) {
|
|
return &Writer{
|
|
store: store,
|
|
}, nil
|
|
}
|
|
|
|
func (w *Writer) Set(key, val []byte) error {
|
|
return nil
|
|
}
|
|
|
|
func (w *Writer) Delete(key []byte) error {
|
|
return nil
|
|
}
|
|
|
|
func (w *Writer) NewBatch() store.KVBatch {
|
|
return newBatch(w.store)
|
|
}
|
|
|
|
func (w *Writer) Close() error {
|
|
return nil
|
|
}
|
|
|
|
// these two methods can safely read using the regular
|
|
// methods without a read transaction, because we know
|
|
// that no one else is writing but us
|
|
func (w *Writer) Get(key []byte) ([]byte, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
func (w *Writer) Iterator(key []byte) store.KVIterator {
|
|
return w.store.iterator(key)
|
|
}
|