discover

type Callback interface {
	UpdateEndpoints(endpoints ...*config.Endpoint)
	//when watch occurred error,will exec this method
	Error(error)
}

type CallbackUpdate interface {
	//TODO:
	//weight automatic discovery change implementation temporarily not ready
	UpdateEndpoints(operation config.Operation, endpoints ...*config.Endpoint)
	//when watch occurred error,will exec this method
	Error(error)
}

type Discover interface {
	// Add project to cache if not exists, then watch the endpoints.
	AddProject(name string, callback Callback)
	// Update a project.
	AddUpdateProject(name string, callback CallbackUpdate)
	Stop()
}

type KeepAlive struct {
	EtcdClientArgs *etcdutil.ClientArgs
	ServerName     string
	HostName       string
	Endpoint       string
	TTL            int64
	LID            clientv3.LeaseID
	Done           chan struct{}
	// contains filtered or unexported fields
}