/
metadata.go
58 lines (49 loc) · 1.16 KB
/
metadata.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
package pstoremem
import (
"sync"
peer "github.com/libp2p/go-libp2p-peer"
pstore "github.com/libp2p/go-libp2p-peerstore"
)
var internKeys = map[string]bool{
"AgentVersion": true,
"ProtocolVersion": true,
}
type metakey struct {
id peer.ID
key string
}
type memoryPeerMetadata struct {
// store other data, like versions
//ds ds.ThreadSafeDatastore
ds map[metakey]interface{}
dslock sync.RWMutex
interned map[string]interface{}
}
var _ pstore.PeerMetadata = (*memoryPeerMetadata)(nil)
func NewPeerMetadata() pstore.PeerMetadata {
return &memoryPeerMetadata{
ds: make(map[metakey]interface{}),
}
}
func (ps *memoryPeerMetadata) Put(p peer.ID, key string, val interface{}) error {
ps.dslock.Lock()
defer ps.dslock.Unlock()
if vals, ok := val.(string); ok && internKeys[key] {
if interned, ok := ps.interned[vals]; ok {
val = interned
} else {
ps.interned[vals] = val
}
}
ps.ds[metakey{p, key}] = val
return nil
}
func (ps *memoryPeerMetadata) Get(p peer.ID, key string) (interface{}, error) {
ps.dslock.RLock()
defer ps.dslock.RUnlock()
i, ok := ps.ds[metakey{p, key}]
if !ok {
return nil, pstore.ErrNotFound
}
return i, nil
}