registry

type Instance interface {
	ServiceName() string
	Address() string
}

type Registry interface {
	Register(serviceInstance Instance) error
	Deregister(serviceInstance Instance) error
	Instances(service string) []Instance
	Watch(service string) (<-chan RegistryChange, func())
}

type RegistryChange struct {
	Instance Instance
	Type     RegistryChangeType
}

type RegistryChangeType int

type Service interface {
	Name() string
}