/
ZkClient.go
executable file
·76 lines (67 loc) · 1.38 KB
/
ZkClient.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
package main
import "time"
import "github.com/samuel/go-zookeeper/zk"
import (
"./config"
"net/http"
"io"
"os"
)
var i int = -1
var cw int = 0
var gcd int = 2
var ZkConn,_,_ = zk.Connect(config.ZkAddresses,time.Second*10)
//轮询节点
func getNode(NodeString []string) string {
for {
i = (i + 1) % len(NodeString)
if i == 0 {
cw = cw - gcd
if cw <= 0 {
cw = 1
if cw == 0 {
return ""
}
}
}
if weight:= 1; weight >= cw {
return string(NodeString[i])
}
}
}
func zkHandler(addresses []string,path string) ([]string,error) {
children,_,err := ZkConn.Children("/services/"+path)
defer func() {
if err := recover(); err != nil {
return
}
}()
return children,err;
}
func getNodeInfo(w http.ResponseWriter,r *http.Request) {
path := r.URL.Query().Get("service")
nodeArr,err:= zkHandler(config.ZkAddresses,path);
defer func() {
if err := recover(); err != nil {
io.WriteString(w,"{\"code\":400,\"data\":\"zk error\"}")
return
}
}()
node := getNode(nodeArr)
jsonData ,_,err := ZkConn.Get("/services/"+path+"/"+node)
if err !=nil {
}
io.WriteString(w,"{\"code\":200,\"data\":"+string(jsonData)+"}")
}
func main(){
http.HandleFunc("/zk",getNodeInfo)
os.Hostname();
hostName,err := os.Hostname();
if err != nil {
panic(err)
}
errr := http.ListenAndServe(hostName+":"+config.HttpPort, nil)
if errr != nil {
panic(errr)
}
}