registry

type Action struct {
	Act namespace.WatcherAction

	E *endpoint.Endpoint

	//etcd key
	Key string
}

type Registry interface {

	// Watcher watch the remote like etcd,who's data change
	Watcher

	// Register register a endpoint to etcd or other
	Register(e *endpoint.Endpoint) error

	// Deregister deregister a endpoint from etcd or other
	Deregister(e *endpoint.Endpoint) error

	// Next get one endpoint
	Next(scope string) (*endpoint.Endpoint, error)

	// List get all endpoint
	List() ([]*endpoint.Endpoint, error)

	// Name return the tool's name like "etcd"
	Name() string

	// Close close registry
	Close()
}

type Watcher interface {
	Watch() chan *Action
}