-
Notifications
You must be signed in to change notification settings - Fork 451
/
listener.go
123 lines (108 loc) · 3.12 KB
/
listener.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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package node
import (
"sync"
"time"
)
// NewListener creates a new listener
func NewListener(
onProcessTerminate func(ServiceNode, string),
onHeartbeatTimeout func(ServiceNode, time.Time),
onOverwrite func(ServiceNode, string),
) Listener {
return &listener{
onProcessTerminate: onProcessTerminate,
onHeartbeatTimeout: onHeartbeatTimeout,
onOverwrite: onOverwrite,
}
}
type listener struct {
onProcessTerminate func(ServiceNode, string)
onHeartbeatTimeout func(ServiceNode, time.Time)
onOverwrite func(ServiceNode, string)
}
func (l *listener) OnProcessTerminate(node ServiceNode, desc string) {
if l.onProcessTerminate != nil {
l.onProcessTerminate(node, desc)
}
}
func (l *listener) OnHeartbeatTimeout(node ServiceNode, lastHeartbeatTs time.Time) {
if l.onHeartbeatTimeout != nil {
l.onHeartbeatTimeout(node, lastHeartbeatTs)
}
}
func (l *listener) OnOverwrite(node ServiceNode, desc string) {
if l.onOverwrite != nil {
l.onOverwrite(node, desc)
}
}
type listenerGroup struct {
sync.Mutex
node ServiceNode
elems map[int]Listener
token int
}
func newListenerGroup(node ServiceNode) *listenerGroup {
return &listenerGroup{
node: node,
elems: make(map[int]Listener),
}
}
func (lg *listenerGroup) add(l Listener) int {
lg.Lock()
defer lg.Unlock()
lg.token++
lg.elems[lg.token] = l
return lg.token
}
func (lg *listenerGroup) clear() {
lg.Lock()
defer lg.Unlock()
for i := range lg.elems {
delete(lg.elems, i)
}
}
func (lg *listenerGroup) remove(t int) {
lg.Lock()
defer lg.Unlock()
delete(lg.elems, t)
}
func (lg *listenerGroup) notifyTimeout(lastTs time.Time) {
lg.Lock()
defer lg.Unlock()
for _, l := range lg.elems {
go l.OnHeartbeatTimeout(lg.node, lastTs)
}
}
func (lg *listenerGroup) notifyTermination(desc string) {
lg.Lock()
defer lg.Unlock()
for _, l := range lg.elems {
go l.OnProcessTerminate(lg.node, desc)
}
}
func (lg *listenerGroup) notifyOverwrite(desc string) {
lg.Lock()
defer lg.Unlock()
for _, l := range lg.elems {
go l.OnOverwrite(lg.node, desc)
}
}