registry - ActiveState ActiveGo 1.8

Package registry

import ""

Overview ▾

Package registry is an interface for service discovery


var (
    DefaultRegistry = newConsulRegistry()

    ErrNotFound = errors.New("not found")

func Deregister

func Deregister(s *Service) error

Deregister a service node

func GetService

func GetService(name string) ([]*Service, error)

Retrieve a service. A slice is returned since we separate Name/Version.

func ListServices

func ListServices() ([]*Service, error)

List the services. Only returns service names

func Register

func Register(s *Service, opts ...RegisterOption) error

Register a service node. Additionally supply options such as TTL.

func String

func String() string

type Endpoint

type Endpoint struct {
    Name     string            `json:"name"`
    Request  *Value            `json:"request"`
    Response *Value            `json:"response"`
    Metadata map[string]string `json:"metadata"`

type Node

type Node struct {
    Id       string            `json:"id"`
    Address  string            `json:"address"`
    Port     int               `json:"port"`
    Metadata map[string]string `json:"metadata"`

type Option

type Option func(*Options)

func Addrs

func Addrs(addrs ...string) Option

Addrs is the registry addresses to use

func Secure

func Secure(b bool) Option

Secure communication with the registry

func TLSConfig

func TLSConfig(t *tls.Config) Option

Specify TLS Config

func Timeout

func Timeout(t time.Duration) Option

type Options

type Options struct {
    Addrs     []string
    Timeout   time.Duration
    Secure    bool
    TLSConfig *tls.Config

    // Other options for implementations of the interface
    // can be stored in a context
    Context context.Context

type RegisterOption

type RegisterOption func(*RegisterOptions)

func RegisterTTL

func RegisterTTL(t time.Duration) RegisterOption

type RegisterOptions

type RegisterOptions struct {
    TTL time.Duration
    // Other options for implementations of the interface
    // can be stored in a context
    Context context.Context

type Registry

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

func NewRegistry

func NewRegistry(opts ...Option) Registry

type Result

Result is returned by a call to Next on the watcher. Actions can be create, update, delete

type Result struct {
    Action  string
    Service *Service

type Service

type Service struct {
    Name      string            `json:"name"`
    Version   string            `json:"version"`
    Metadata  map[string]string `json:"metadata"`
    Endpoints []*Endpoint       `json:"endpoints"`
    Nodes     []*Node           `json:"nodes"`

type Value

type Value struct {
    Name   string   `json:"name"`
    Type   string   `json:"type"`
    Values []*Value `json:"values"`

type Watcher

Watcher is an interface that returns updates about services within the registry.

type Watcher interface {
    // Next is a blocking call
    Next() (*Result, error)

func Watch

func Watch() (Watcher, error)

Watch returns a watcher which allows you to track updates to the registry.


Name Synopsis