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
|
package etcd
import (
"errors"
"time"
"github.com/xordataexchange/crypt/backend"
goetcd "github.com/coreos/go-etcd/etcd"
)
type Client struct {
client *goetcd.Client
waitIndex uint64
}
func New(machines []string) (*Client, error) {
return &Client{goetcd.NewClient(machines), 0}, nil
}
func (c *Client) Get(key string) ([]byte, error) {
resp, err := c.client.Get(key, false, false)
if err != nil {
return nil, err
}
return []byte(resp.Node.Value), nil
}
func addKVPairs(node *goetcd.Node, list backend.KVPairs) backend.KVPairs {
if node.Dir {
for _, n := range node.Nodes {
list = addKVPairs(n, list)
}
return list
}
return append(list, &backend.KVPair{Key: node.Key, Value: []byte(node.Value)})
}
func (c *Client) List(key string) (backend.KVPairs, error) {
resp, err := c.client.Get(key, false, true)
if err != nil {
return nil, err
}
if !resp.Node.Dir {
return nil, errors.New("key is not a directory")
}
list := addKVPairs(resp.Node, nil)
return list, nil
}
func (c *Client) Set(key string, value []byte) error {
_, err := c.client.Set(key, string(value), 0)
return err
}
func (c *Client) Watch(key string, stop chan bool) <-chan *backend.Response {
respChan := make(chan *backend.Response, 0)
go func() {
for {
var resp *goetcd.Response
var err error
// if c.waitIndex == 0 {
// resp, err = c.client.Get(key, false, false)
// if err != nil {
// respChan <- &backend.Response{nil, err}
// time.Sleep(time.Second * 5)
// continue
// }
// c.waitIndex = resp.EtcdIndex
// respChan <- &backend.Response{[]byte(resp.Node.Value), nil}
// }
// resp, err = c.client.Watch(key, c.waitIndex+1, false, nil, stop)
resp, err = c.client.Watch(key, 0, false, nil, stop)
if err != nil {
respChan <- &backend.Response{nil, err}
time.Sleep(time.Second * 5)
continue
}
c.waitIndex = resp.Node.ModifiedIndex
respChan <- &backend.Response{[]byte(resp.Node.Value), nil}
}
}()
return respChan
}
|
