/
redis.go
72 lines (59 loc) · 1.22 KB
/
redis.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
package orm
import (
"time"
"github.com/hoisie/redis"
)
var CacheConsistent = NewConsistent()
var (
getRedis = make(chan *comandGetRedisConn)
updateRedis = make(chan []string)
RedisServer = map[string]*redis.Client{}
)
//获取目标地址的功能
type comandGetRedisConn struct {
Key string
Call chan *redis.Client
}
func init() {
go goRedisRuntime()
}
//守护服务
func goRedisRuntime() {
for {
select {
case mapping := <-updateRedis:
CacheConsistent.Set(mapping)
case t := <-getRedis:
addr, err := getRedisAddrByKey(t.Key)
if err != nil {
t.Call <- nil
return
}
client, ok := RedisServer[addr]
if !ok {
client = new(redis.Client)
client.Addr = addr
client.Db = cache_db
client.MaxPoolSize = 8
RedisServer[addr] = client
}
t.Call <- client
}
}
}
//通过一致性hash服务, 得到当前key应该分配给哪个redis服务器
func getRedisAddrByKey(key string) (string, error) {
return CacheConsistent.Get(key)
}
func GetRedisClient(key string) *redis.Client {
p := new(comandGetRedisConn)
p.Call = make(chan *redis.Client, 1)
p.Key = key
getRedis <- p
select {
case item := <-p.Call:
return item
case <-time.After(time.Second * 5):
return nil
}
}