-
Notifications
You must be signed in to change notification settings - Fork 1
/
ext.go
193 lines (165 loc) · 4.23 KB
/
ext.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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
// Package redis tool
package redis
import (
"context"
"fmt"
"log"
"math/rand"
"time"
"github.com/assembly-hub/basics/util"
)
// GetLock 获取redis锁,成功返回nil,否则返回对应error
func (r *Redis) GetLock(key string, lockVal *string, exp int) error {
val := ""
if lockVal != nil {
val = *lockVal
} else {
val = fmt.Sprintf("%v-%08v", time.Now().UnixNano(), rand.New(rand.NewSource(time.Now().UnixNano())).Int63n(100000000))
}
ctx, cancel := context.WithTimeout(context.Background(), time.Duration(3)*time.Second)
defer cancel()
ok, err := r.SetNxSec(ctx, key, val, exp)
if err != nil {
return err
}
if !ok {
return fmt.Errorf("add lock is failed")
}
return nil
}
// TryLock 尝试获取redis锁,指定重试次数和重试间隔,成功返回nil,否则返回对应error
func (r *Redis) TryLock(key string, lockVal *string, exp int, maxTryTime int, intervalMs int64) error {
val := ""
if lockVal != nil {
val = *lockVal
} else {
val = fmt.Sprintf("%v-%08v", time.Now().UnixNano(), rand.New(rand.NewSource(time.Now().UnixNano())).Int63n(100000000))
}
if maxTryTime < 0 {
maxTryTime = 0
}
if intervalMs < 10 {
intervalMs = 100
}
err := r.GetLock(key, &val, exp)
if err != nil && maxTryTime > 0 {
for i := 0; i < maxTryTime; i++ {
time.Sleep(time.Duration(intervalMs) * time.Millisecond)
err = r.GetLock(key, &val, exp)
if err == nil {
break
}
}
}
return err
}
// WithLock 尝试获取redis锁,指定重试次数和重试间隔,获取成功之后执行 fun,否则不执行
func (r *Redis) WithLock(key string, lockVal *string, exp int, maxTryTime int, intervalMs int64, fun func()) {
err := r.TryLock(key, lockVal, exp, maxTryTime, intervalMs)
if err != nil {
panic(err)
}
defer func() {
e := r.FreeLock(key)
if e != nil {
log.Println(e)
}
}()
fun()
}
// FreeLock 释放指定的redis锁
func (r *Redis) FreeLock(key string) error {
ctx, cancel := context.WithTimeout(context.Background(), time.Duration(3)*time.Second)
defer cancel()
_, err := r.Del(ctx, key)
if err != nil {
return err
}
return nil
}
// Register 注册HA 主服务标识,注册成功返回true,否则返回false
func (r *Redis) Register(key string, val string, exp int) bool {
ctx, cancel := context.WithTimeout(context.Background(), time.Duration(3)*time.Second)
_, err := r.SetNxSec(ctx, key, val, exp)
cancel()
if err != nil {
log.Println(err)
return false
}
ctx, cancel = context.WithTimeout(context.Background(), time.Duration(3)*time.Second)
redisVal, err := r.Get(ctx, key)
cancel()
if err != nil {
log.Println(err)
return false
}
if redisVal == val {
ctx, cancel = context.WithTimeout(context.Background(), time.Duration(3)*time.Second)
_, err = r.SetXxSec(ctx, key, val, exp)
cancel()
if err != nil {
log.Println(err)
}
return true
}
return false
}
// QuotaLimit 资源量限制,被限制返回true,否则返回false
func (r *Redis) QuotaLimit(limitKay string, maxCount int, exp int, addCount int, addLock bool) bool {
if maxCount < addCount {
return true
}
innerFunc := func(red *Redis) bool {
ctx, cancel := context.WithTimeout(context.Background(), time.Duration(3)*time.Second)
keyTime, err := red.TTL(ctx, limitKay)
cancel()
if err != nil {
log.Println(err)
return true
}
ctx, cancel = context.WithTimeout(context.Background(), time.Duration(3)*time.Second)
limitCount, err := red.Get(ctx, limitKay)
cancel()
if err != nil {
log.Println(err)
return true
}
if limitCount != "" && keyTime > 0 {
lc, err := util.Str2Int[int](limitCount)
if err != nil {
log.Println(err)
return true
}
if lc >= maxCount {
return true
}
if keyTime > 0 {
exp = int(keyTime)
}
addCount += lc
}
ctx, cancel = context.WithTimeout(context.Background(), time.Duration(3)*time.Second)
err = red.SetEx(ctx, limitKay, util.IntToStr(addCount), exp)
cancel()
if err != nil {
log.Println(err)
return true
}
return false
}
if addLock {
lockKey := "redis_lock_" + limitKay
err := r.TryLock(lockKey, nil, 3, 5, 200)
if err != nil {
return true
}
defer func() {
e := r.FreeLock(lockKey)
if e != nil {
log.Println(e)
}
}()
return innerFunc(r)
}
return innerFunc(r)
}