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/
zk.go
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/
zk.go
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/**
* Copyright 2018 gd Author. All Rights Reserved.
* Author: Chuck1024
*/
package register
import (
"encoding/json"
"errors"
"fmt"
"github.com/gdp-org/gd/dlog"
"github.com/gdp-org/gd/service"
"github.com/gdp-org/gd/utls/network"
"github.com/samuel/go-zookeeper/zk"
"gopkg.in/ini.v1"
"strings"
"sync"
"time"
)
type ZkConfig struct {
Host []string // zk server host
Root string // root path
Group string // service group
Service string // service name
NodeInfo service.NodeInfo // service node info
Environ string //service run environment
}
type ZkRegister struct {
ZkConfig *ZkConfig `inject:"zkConfig" canNil:"true"`
ZkConf *ini.File `inject:"zkConf" canNil:"true"`
ZkConfPath string `inject:"zkConfPath" canNil:"true"`
client *zk.Conn // zk client
startOnce sync.Once
closeOnce sync.Once
}
func (z *ZkRegister) Start() error {
var err error
z.startOnce.Do(func() {
if z.ZkConfig != nil {
err = z.initWithZkConfig(z.ZkConfig)
} else if z.ZkConf != nil {
err = z.initZk(z.ZkConf)
} else {
if z.ZkConfPath == "" {
z.ZkConfPath = defaultConf
}
err = z.initObjForZk(z.ZkConfPath)
}
})
return err
}
func (z *ZkRegister) Close() {
if z.client != nil {
z.client.Close()
z.client = nil
}
}
func (z *ZkRegister) initObjForZk(filePath string) error {
zkConfRealPath := filePath
if zkConfRealPath == "" {
return errors.New("zkConf not set")
}
if !strings.HasSuffix(zkConfRealPath, ".ini") {
return errors.New("zkConf not an ini file")
}
zkConf, err := ini.Load(zkConfRealPath)
if err != nil {
return err
}
if err = z.initZk(zkConf); err != nil {
return err
}
return nil
}
func (z *ZkRegister) initZk(f *ini.File) error {
c := f.Section("DisRes")
hosts := c.Key("zkHost").Strings(",")
root := strings.TrimRight(c.Key("root").String(), "/")
environ := c.Key("env").String()
group := c.Key("group").String()
s := f.Section("Server")
serviceName := s.Key("serverName").String()
ip := network.GetLocalIP()
port := c.Key("regPort").MustInt()
weight := c.Key("weight").MustUint64()
config := &ZkConfig{
Host: hosts,
Root: root,
Group: group,
Service: serviceName,
Environ: environ,
NodeInfo: &service.DefaultNodeInfo{
Ip: ip,
Port: port,
Offline: false,
Weight: weight,
},
}
return z.initWithZkConfig(config)
}
func (z *ZkRegister) initWithZkConfig(c *ZkConfig) error {
conn, _, err := zk.Connect(c.Host, time.Second*5, zk.WithLogInfo(false))
if err != nil {
dlog.Error("zk connect occur error:%s", err)
return err
}
z.ZkConfig = c
z.client = conn
err = z.isExistNode()
if err != nil {
dlog.Error("zk isExistNode occur error:%s", err)
return err
}
err = z.run()
if err != nil {
dlog.Error("zk run occur error:%s", err)
return err
}
return nil
}
func (z *ZkRegister) run() (err error) {
p := fmt.Sprintf("/%s/%s/%s/%s/pool/%s:%d", z.ZkConfig.Root, z.ZkConfig.Group, z.ZkConfig.Service, z.ZkConfig.Environ,
z.ZkConfig.NodeInfo.GetIp(), z.ZkConfig.NodeInfo.GetPort())
dlog.Info("zk path: %s", p)
dataByte, _ := json.Marshal(&z.ZkConfig.NodeInfo)
path, err := z.client.Create(p, dataByte, zk.FlagEphemeral, zk.WorldACL(zk.PermAll))
if err != nil {
dlog.Error("zk create occur error:%s", err)
return
}
if path == p {
dlog.Info("zk create success! path:%s", path)
}
return
}
func (z *ZkRegister) SetOffline(offline bool) {
z.ZkConfig.NodeInfo.(*service.DefaultNodeInfo).Offline = offline
}
func (z *ZkRegister) SetRootNode(root string) (err error) {
z.ZkConfig.Root = strings.TrimRight(root, "/")
if len(z.ZkConfig.Root) == 0 {
err = fmt.Errorf("invalid root node %s", root)
return
}
return nil
}
func (z *ZkRegister) GetRootNode() (root string) {
return z.ZkConfig.Root
}
func (z *ZkRegister) SetHeartBeat(heartBeat time.Duration) {
}
func (z *ZkRegister) isExistNode() (err error) {
node := fmt.Sprintf("/%s/%s/%s", z.ZkConfig.Root, z.ZkConfig.Group, z.ZkConfig.Service)
isExist, _, err := z.client.Exists(node)
if err != nil {
dlog.Error("zk client Exists occur error: %s", err)
return
}
if !isExist {
p1 := node + "/" + z.ZkConfig.Environ
p2 := p1 + "/pool"
paths := []string{node, p1, p2}
for _, v := range paths {
path, err := z.client.Create(v, []byte(""), 0, zk.WorldACL(zk.PermAll))
if err != nil {
dlog.Error("zk create path occur error: %s, path = %s", err, v)
return err
}
if v != path {
dlog.Error("zk create path [%s] != path [%s]", node, path)
return errors.New("rootPath is equal path")
}
}
}
return
}