RedConf

Sync config from redis or others storages while the key's value changed

Usage

• The following struct is the config what we want sync with storage while the values changed

type ServerConfig struct {
	Host     string
	Port     int
	AllowIPs []string
}

type LogConfig struct {
	Path    string
	Maxsize int
}

type AppConfig struct {
	Server ServerConfig
	Log    LogConfig
}

• We need create storage for tell redconf where the config values stored, and create monitor to notify the redconf while the values changed

	opts = redconf.Options{
		"address":  "localhost:6379",
		"password": "",
		"db":       0,
		"idle":     10,
		"channel":  "ONCHANGED",
	}

	if monitor, err = redconf.CreateMonitor("redis", opts); err != nil {
		fmt.Println(err)
		return
	}

	if storage, err = redconf.CreateStorage("redis", opts); err != nil {
		fmt.Println(err)
		return
	}

• Create RedConf instance and watch the config

	if redConf, err = redconf.New(namespace, storage, monitor); err != nil {
		return
	}

	appConf := AppConfig{}

	if err = redConf.Watch(&appConf); err != nil {
		fmt.Println(err)
		return
	}

• Initial redis key-value

$> redis-cli
127.0.0.1:6379> SET GOGAP:AppConfig:Server:AllowIPs 127.0.0.1,202.10.5.123
OK

• Run example code

$> go run example/*.go

• Open new terminal session and change the config in redis

$> redis-cli
127.0.0.1:6379>SET GOGAP:AppConfig:Server:AllowIPs 127.0.0.1,202.10.5.125
OK
127.0.0.1:6379> PUBLISH ONCHANGED GOGAP:AppConfig:Server:AllowIPs
(integer) 1

Then you will see the change from your terminal

• if you want subscribe the value change event, you could do as following:

func onValueChangedSubscriber(event redconf.OnValueChangedEvent) {
	var err error
	var data []byte
	if data, err = json.MarshalIndent(&event, "", "    "); err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(string(data))
}


redConf.Subscribe(onValueChangedSubscriber)