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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// Copyright 2020 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package caches
import (
"log"
"github.com/syndtr/goleveldb/leveldb"
)
// LevelDBStore implements CacheStore provide local machine
type LevelDBStore struct {
store *leveldb.DB
Debug bool
v interface{}
}
var _ CacheStore = &LevelDBStore{}
func NewLevelDBStore(dbfile string) (*LevelDBStore, error) {
db := &LevelDBStore{}
h, err := leveldb.OpenFile(dbfile, nil)
if err != nil {
return nil, err
}
db.store = h
return db, nil
}
func (s *LevelDBStore) Put(key string, value interface{}) error {
val, err := Encode(value)
if err != nil {
if s.Debug {
log.Println("[LevelDB]EncodeErr: ", err, "Key:", key)
}
return err
}
err = s.store.Put([]byte(key), val, nil)
if err != nil {
if s.Debug {
log.Println("[LevelDB]PutErr: ", err, "Key:", key)
}
return err
}
if s.Debug {
log.Println("[LevelDB]Put: ", key)
}
return err
}
func (s *LevelDBStore) Get(key string) (interface{}, error) {
data, err := s.store.Get([]byte(key), nil)
if err != nil {
if s.Debug {
log.Println("[LevelDB]GetErr: ", err, "Key:", key)
}
if err == leveldb.ErrNotFound {
return nil, ErrNotExist
}
return nil, err
}
err = Decode(data, &s.v)
if err != nil {
if s.Debug {
log.Println("[LevelDB]DecodeErr: ", err, "Key:", key)
}
return nil, err
}
if s.Debug {
log.Println("[LevelDB]Get: ", key, s.v)
}
return s.v, err
}
func (s *LevelDBStore) Del(key string) error {
err := s.store.Delete([]byte(key), nil)
if err != nil {
if s.Debug {
log.Println("[LevelDB]DelErr: ", err, "Key:", key)
}
return err
}
if s.Debug {
log.Println("[LevelDB]Del: ", key)
}
return err
}
func (s *LevelDBStore) Close() {
s.store.Close()
}
|
