cmd

Documentation

Overview

Package cmd is an interface for parsing the command line

Index

• Variables
• func App() *cli.App
• func Init(opts ...Option) error
• type Cmd
  • func NewCmd(opts ...Option) Cmd
• type Option
  • func Broker(b *broker.Broker) Option
  • func Client(c *client.Client) Option
  • func Description(d string) Option
  • func Name(n string) Option
  • func NewBroker(name string, b func(...broker.Option) broker.Broker) Option
  • func NewClient(name string, b func(...client.Option) client.Client) Option
  • func NewRegistry(name string, r func(...registry.Option) registry.Registry) Option
  • func NewSelector(name string, s func(...selector.Option) selector.Selector) Option
  • func NewServer(name string, s func(...server.Option) server.Server) Option
  • func NewTransport(name string, t func(...transport.Option) transport.Transport) Option
  • func Registry(r *registry.Registry) Option
  • func Selector(s *selector.Selector) Option
  • func Server(s *server.Server) Option
  • func Transport(t *transport.Transport) Option
  • func Version(v string) Option
• type Options
  • func DefaultOptions() Options

Variables

var (
	DefaultCmd = newCmd()

	DefaultFlags = []cli.Flag{
		cli.StringFlag{
			Name:   "client",
			EnvVar: "MICRO_CLIENT",
			Usage:  "Client for go-micro; rpc",
		},
		cli.StringFlag{
			Name:   "client_request_timeout",
			EnvVar: "MICRO_CLIENT_REQUEST_TIMEOUT",
			Usage:  "Sets the client request timeout. e.g 500ms, 5s, 1m. Default: 5s",
		},
		cli.IntFlag{
			Name:   "client_retries",
			EnvVar: "MICRO_CLIENT_RETRIES",
			Usage:  "Sets the client retries. Default: 1",
		},
		cli.IntFlag{
			Name:   "client_pool_size",
			EnvVar: "MICRO_CLIENT_POOL_SIZE",
			Usage:  "Sets the client connection pool size. Default: 1",
		},
		cli.StringFlag{
			Name:   "client_pool_ttl",
			EnvVar: "MICRO_CLIENT_POOL_TTL",
			Usage:  "Sets the client connection pool ttl. e.g 500ms, 5s, 1m. Default: 1m",
		},
		cli.IntFlag{
			Name:   "register_ttl",
			EnvVar: "MICRO_REGISTER_TTL",
			Usage:  "Register TTL in seconds",
		},
		cli.IntFlag{
			Name:   "register_interval",
			EnvVar: "MICRO_REGISTER_INTERVAL",
			Usage:  "Register interval in seconds",
		},
		cli.StringFlag{
			Name:   "server_name",
			EnvVar: "MICRO_SERVER_NAME",
			Usage:  "Name of the server. go.micro.srv.example",
		},
		cli.StringFlag{
			Name:   "server_version",
			EnvVar: "MICRO_SERVER_VERSION",
			Usage:  "Version of the server. 1.1.0",
		},
		cli.StringFlag{
			Name:   "server_id",
			EnvVar: "MICRO_SERVER_ID",
			Usage:  "Id of the server. Auto-generated if not specified",
		},
		cli.StringFlag{
			Name:   "server_address",
			EnvVar: "MICRO_SERVER_ADDRESS",
			Usage:  "Bind address for the server. 127.0.0.1:8080",
		},
		cli.StringFlag{
			Name:   "server_advertise",
			EnvVar: "MICRO_SERVER_ADVERTISE",
			Usage:  "Used instead of the server_address when registering with discovery. 127.0.0.1:8080",
		},
		cli.StringSliceFlag{
			Name:   "server_metadata",
			EnvVar: "MICRO_SERVER_METADATA",
			Value:  &cli.StringSlice{},
			Usage:  "A list of key-value pairs defining metadata. version=1.0.0",
		},
		cli.StringFlag{
			Name:   "broker",
			EnvVar: "MICRO_BROKER",
			Usage:  "Broker for pub/sub. http, nats, rabbitmq",
		},
		cli.StringFlag{
			Name:   "broker_address",
			EnvVar: "MICRO_BROKER_ADDRESS",
			Usage:  "Comma-separated list of broker addresses",
		},
		cli.StringFlag{
			Name:   "registry",
			EnvVar: "MICRO_REGISTRY",
			Usage:  "Registry for discovery. consul, mdns",
		},
		cli.StringFlag{
			Name:   "registry_address",
			EnvVar: "MICRO_REGISTRY_ADDRESS",
			Usage:  "Comma-separated list of registry addresses",
		},
		cli.StringFlag{
			Name:   "selector",
			EnvVar: "MICRO_SELECTOR",
			Usage:  "Selector used to pick nodes for querying",
			Value:  "cache",
		},
		cli.StringFlag{
			Name:   "server",
			EnvVar: "MICRO_SERVER",
			Usage:  "Server for go-micro; rpc",
		},
		cli.StringFlag{
			Name:   "transport",
			EnvVar: "MICRO_TRANSPORT",
			Usage:  "Transport mechanism used; http",
		},
		cli.StringFlag{
			Name:   "transport_address",
			EnvVar: "MICRO_TRANSPORT_ADDRESS",
			Usage:  "Comma-separated list of transport addresses",
		},
	}

	DefaultBrokers = map[string]func(...broker.Option) broker.Broker{
		"http": http.NewBroker,
	}

	DefaultClients = map[string]func(...client.Option) client.Client{
		"rpc": client.NewClient,
	}

	DefaultRegistries = map[string]func(...registry.Option) registry.Registry{
		"consul": consul.NewRegistry,
		"mdns":   mdns.NewRegistry,
	}

	DefaultSelectors = map[string]func(...selector.Option) selector.Selector{
		"default": selector.NewSelector,
		"cache":   cache.NewSelector,
	}

	DefaultServers = map[string]func(...server.Option) server.Server{
		"rpc": server.NewServer,
	}

	DefaultTransports = map[string]func(...transport.Option) transport.Transport{
		"http": thttp.NewTransport,
	}
)

Functions

func App

func App() *cli.App

func Init

func Init(opts ...Option) error

Types

type Cmd

type Cmd interface {
	// The cli app within this cmd
	App() *cli.App
	// Adds options, parses flags and initialise
	// exits on error
	Init(opts ...Option) error
	// Options set within this command
	Options() Options
}

func NewCmd

func NewCmd(opts ...Option) Cmd

type Option

type Option func(o *Options)

func Broker

func Broker(b *broker.Broker) Option

func Client

func Client(c *client.Client) Option

func Description

func Description(d string) Option

Command line Description

func Name

func Name(n string) Option

Command line Name

func NewBroker

func NewBroker(name string, b func(...broker.Option) broker.Broker) Option

New broker func

func NewClient

func NewClient(name string, b func(...client.Option) client.Client) Option

New client func

func NewRegistry

func NewRegistry(name string, r func(...registry.Option) registry.Registry) Option

New registry func

func NewSelector

func NewSelector(name string, s func(...selector.Option) selector.Selector) Option

New selector func

func NewServer

func NewServer(name string, s func(...server.Option) server.Server) Option

New server func

func NewTransport

func NewTransport(name string, t func(...transport.Option) transport.Transport) Option

New transport func

func Registry

func Registry(r *registry.Registry) Option

func Selector

func Selector(s *selector.Selector) Option

func Server

func Server(s *server.Server) Option

func Transport

func Transport(t *transport.Transport) Option

func Version

func Version(v string) Option

Command line Version

type Options

type Options struct {
	// For the Command Line itself
	Name        string
	Description string
	Version     string

	// We need pointers to things so we can swap them out if needed.
	Broker    *broker.Broker
	Registry  *registry.Registry
	Selector  *selector.Selector
	Transport *transport.Transport
	Client    *client.Client
	Server    *server.Server

	Brokers    map[string]func(...broker.Option) broker.Broker
	Clients    map[string]func(...client.Option) client.Client
	Registries map[string]func(...registry.Option) registry.Registry
	Selectors  map[string]func(...selector.Option) selector.Selector
	Servers    map[string]func(...server.Option) server.Server
	Transports map[string]func(...transport.Option) transport.Transport

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

func DefaultOptions

func DefaultOptions() Options