65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
// Package registry is an interface for service discovery
|
|
package registry
|
|
|
|
import (
|
|
"errors"
|
|
)
|
|
|
|
var (
|
|
DefaultRegistry = NewRegistry()
|
|
|
|
// Not found error when GetService is called
|
|
ErrNotFound = errors.New("service not found")
|
|
// Watcher stopped error when watcher is stopped
|
|
ErrWatcherStopped = errors.New("watcher stopped")
|
|
)
|
|
|
|
// The registry provides an interface for service discovery
|
|
// and an abstraction over varying implementations
|
|
// {consul, etcd, zookeeper, ...}
|
|
type Registry interface {
|
|
Init(...Option) error
|
|
Options() Options
|
|
Register(*Service, ...RegisterOption) error
|
|
Deregister(*Service) error
|
|
GetService(string) ([]*Service, error)
|
|
ListServices() ([]*Service, error)
|
|
Watch(...WatchOption) (Watcher, error)
|
|
String() string
|
|
}
|
|
|
|
type Option func(*Options)
|
|
|
|
type RegisterOption func(*RegisterOptions)
|
|
|
|
type WatchOption func(*WatchOptions)
|
|
|
|
// 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(opts ...WatchOption) (Watcher, error) {
|
|
return DefaultRegistry.Watch(opts...)
|
|
}
|
|
|
|
func String() string {
|
|
return DefaultRegistry.String()
|
|
}
|