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
|
// Copyright 2015 The etcd Authors
//
// 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 rafthttp
import (
"net/url"
"sync"
"go.etcd.io/etcd/client/pkg/v3/types"
)
type urlPicker struct {
mu sync.Mutex // guards urls and picked
urls types.URLs
picked int
}
func newURLPicker(urls types.URLs) *urlPicker {
return &urlPicker{
urls: urls,
}
}
func (p *urlPicker) update(urls types.URLs) {
p.mu.Lock()
defer p.mu.Unlock()
p.urls = urls
p.picked = 0
}
func (p *urlPicker) pick() url.URL {
p.mu.Lock()
defer p.mu.Unlock()
return p.urls[p.picked]
}
// unreachable notices the picker that the given url is unreachable,
// and it should use other possible urls.
func (p *urlPicker) unreachable(u url.URL) {
p.mu.Lock()
defer p.mu.Unlock()
if u == p.urls[p.picked] {
p.picked = (p.picked + 1) % len(p.urls)
}
}
|
