-
Notifications
You must be signed in to change notification settings - Fork 12
/
store.go
103 lines (83 loc) · 2.64 KB
/
store.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
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
95
96
97
98
99
100
101
102
103
package slotstore
import (
"github.com/iotaledger/hive.go/ierrors"
"github.com/iotaledger/hive.go/kvstore"
iotago "github.com/iotaledger/iota.go/v4"
)
type Store[K, V any] struct {
slot iotago.SlotIndex
kv *kvstore.TypedStore[K, V]
}
func NewStore[K, V any](
slot iotago.SlotIndex,
kv kvstore.KVStore,
keyToBytes kvstore.ObjectToBytes[K],
bytesToKey kvstore.BytesToObject[K],
vToBytes kvstore.ObjectToBytes[V],
bytesToV kvstore.BytesToObject[V],
) *Store[K, V] {
return &Store[K, V]{
slot: slot,
kv: kvstore.NewTypedStore(kv, keyToBytes, bytesToKey, vToBytes, bytesToV),
}
}
func (s *Store[K, V]) Load(key K) (value V, exists bool, err error) {
value, err = s.kv.Get(key)
if err != nil {
var zeroValue V
if ierrors.Is(err, kvstore.ErrKeyNotFound) {
return zeroValue, false, nil
}
return zeroValue, false, ierrors.Wrapf(err, "failed to get value for key %v", key)
}
return value, true, nil
}
func (s *Store[K, V]) Store(key K, value V) error {
return s.kv.Set(key, value)
}
// Has returns true if the given blockID is a root block.
func (s *Store[K, V]) Has(key K) (has bool, err error) {
return s.kv.Has(key)
}
func (s *Store[K, V]) Delete(key K) (err error) {
return s.kv.Delete(key)
}
func (s *Store[K, V]) StreamKeys(consumer func(key K) error) error {
var innerErr error
if storageErr := s.kv.IterateKeys(kvstore.EmptyPrefix, func(key K) (advance bool) {
innerErr = consumer(key)
return innerErr == nil
}); storageErr != nil {
return ierrors.Wrapf(storageErr, "failed to iterate over keys for slot %s", s.slot)
}
if innerErr != nil {
return ierrors.Wrapf(innerErr, "failed to stream keys for slot %s", s.slot)
}
return nil
}
func (s *Store[K, V]) Stream(consumer func(key K, value V) error) error {
var innerErr error
if storageErr := s.kv.Iterate(kvstore.EmptyPrefix, func(key K, value V) (advance bool) {
innerErr = consumer(key, value)
return innerErr == nil
}); storageErr != nil {
return ierrors.Wrapf(storageErr, "failed to iterate over store for slot %s", s.slot)
}
if innerErr != nil {
return ierrors.Wrapf(innerErr, "failed to stream store for slot %s", s.slot)
}
return nil
}
func (s *Store[K, V]) StreamBytes(consumer func([]byte, []byte) error) error {
var innerErr error
if storageErr := s.kv.KVStore().Iterate(kvstore.EmptyPrefix, func(key kvstore.Key, value kvstore.Value) (advance bool) {
innerErr = consumer(key, value)
return innerErr == nil
}); storageErr != nil {
return ierrors.Wrapf(storageErr, "failed to iterate over store for slot %s", s.slot)
}
if innerErr != nil {
return ierrors.Wrapf(innerErr, "failed to stream bytes in store for slot %s", s.slot)
}
return innerErr
}