func NewBackend(filename string) (registry.Backend, error) {
data, err := ioutil.ReadFile(filename)
if err != nil {
log.Println("[ERROR] Cannot read routes from ", filename)
return nil, err
}
return static.NewBackend(string(data))
}
func initBackend(cfg *config.Config) {
var err error
switch cfg.Registry.Backend {
case "file":
registry.Default, err = file.NewBackend(cfg.Registry.File.Path)
case "static":
registry.Default, err = static.NewBackend(cfg.Registry.Static.Routes)
case "consul":
registry.Default, err = consul.NewBackend(&cfg.Registry.Consul)
default:
log.Fatal("[FATAL] Unknown registry backend ", cfg.Registry.Backend)
}
if err != nil {
log.Fatal("[FATAL] Error initializing backend. ", err)
}
if err := registry.Default.Register(); err != nil {
log.Fatal("[FATAL] Error registering backend. ", err)
}
}
// 初始化后端服务器的配置信息
// 初始后端注册服务的默认 registry.Default 注册服务及配置信息
func initBackend(cfg *config.Config) {
var err error
// 根据配置中的 Registry -> Backend 的数据(file | static | consul)来判断后端服务的类型，并生成相应的配置信息
switch cfg.Registry.Backend {
case "file":
registry.Default, err = file.NewBackend(cfg.Registry.File.Path)
case "static":
registry.Default, err = static.NewBackend(cfg.Registry.Static.Routes)
case "consul":
registry.Default, err = consul.NewBackend(&cfg.Registry.Consul)
default:
exit.Fatal("[FATAL] Unknown registry backend ", cfg.Registry.Backend)
}
if err != nil {
exit.Fatal("[FATAL] Error initializing backend. ", err)
}
if err := registry.Default.Register(); err != nil {
exit.Fatal("[FATAL] Error registering backend. ", err)
}
}