forked from blevesearch/bleve
-
Notifications
You must be signed in to change notification settings - Fork 0
/
batch.go
69 lines (59 loc) · 1.54 KB
/
batch.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
// 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 store
type op struct {
K []byte
V []byte
}
type EmulatedBatch struct {
w KVWriter
ops []*op
merge *EmulatedMerge
}
func NewEmulatedBatch(w KVWriter, mo MergeOperator) *EmulatedBatch {
return &EmulatedBatch{
w: w,
ops: make([]*op, 0, 1000),
merge: NewEmulatedMerge(mo),
}
}
func (b *EmulatedBatch) Set(key, val []byte) {
b.ops = append(b.ops, &op{key, val})
}
func (b *EmulatedBatch) Delete(key []byte) {
b.ops = append(b.ops, &op{key, nil})
}
func (b *EmulatedBatch) Merge(key, val []byte) {
b.merge.Merge(key, val)
}
func (b *EmulatedBatch) Execute() error {
// first process merges
err := b.merge.Execute(b.w)
if err != nil {
return err
}
// now apply all the ops
for _, op := range b.ops {
if op.V != nil {
err := b.w.Set(op.K, op.V)
if err != nil {
return err
}
} else {
err := b.w.Delete(op.K)
if err != nil {
return err
}
}
}
return nil
}
func (b *EmulatedBatch) Close() error {
return nil
}