micro/registry/registry.go
2016-02-25 12:42:31 +00:00

61 lines
1.4 KiB
Go

package registry
import (
"errors"
)
// The registry provides an interface for service discovery
// and an abstraction over varying implementations
// {consul, etcd, zookeeper, ...}
type Registry interface {
Register(*Service, ...RegisterOption) error
Deregister(*Service) error
GetService(string) ([]*Service, error)
ListServices() ([]*Service, error)
Watch() (Watcher, error)
String() string
}
type Option func(*Options)
type RegisterOption func(*RegisterOptions)
var (
DefaultRegistry = newConsulRegistry([]string{})
ErrNotFound = errors.New("not found")
)
func NewRegistry(addrs []string, opt ...Option) Registry {
return newConsulRegistry(addrs, opt...)
}
// Register a service node. Additionally supply options such as TTL.
func Register(s *Service, opts ...RegisterOption) error {
return DefaultRegistry.Register(s, opts...)
}
// Deregister a service node
func Deregister(s *Service) error {
return DefaultRegistry.Deregister(s)
}
// Retrieve a service. A slice is returned since we separate Name/Version.
func GetService(name string) ([]*Service, error) {
return DefaultRegistry.GetService(name)
}
// List the services. Only returns service names
func ListServices() ([]*Service, error) {
return DefaultRegistry.ListServices()
}
// Watch returns a watcher which allows you to track updates to the registry.
func Watch() (Watcher, error) {
return DefaultRegistry.Watch()
}
func String() string {
return DefaultRegistry.String()
}