349 lines
8.8 KiB
Go
349 lines
8.8 KiB
Go
package cmd
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"math/rand"
|
|
"os"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/micro/cli"
|
|
"github.com/micro/go-micro/broker"
|
|
"github.com/micro/go-micro/client"
|
|
"github.com/micro/go-micro/registry"
|
|
"github.com/micro/go-micro/selector"
|
|
"github.com/micro/go-micro/server"
|
|
"github.com/micro/go-micro/transport"
|
|
)
|
|
|
|
type Cmd interface {
|
|
// The cli app within this cmd
|
|
App() *cli.App
|
|
// Adds options, parses flags and initialise
|
|
// exits on error
|
|
Init(opts ...Option)
|
|
// Options set within this command
|
|
Options() Options
|
|
}
|
|
|
|
type cmd struct {
|
|
opts Options
|
|
app *cli.App
|
|
}
|
|
|
|
type Option func(o *Options)
|
|
|
|
var (
|
|
DefaultCmd = newCmd()
|
|
|
|
DefaultFlags = []cli.Flag{
|
|
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. memory, consul, etcd, kubernetes",
|
|
},
|
|
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. random, roundrobin, blacklist",
|
|
},
|
|
cli.StringFlag{
|
|
Name: "transport",
|
|
EnvVar: "MICRO_TRANSPORT",
|
|
Usage: "Transport mechanism used; http, rabbitmq, nats",
|
|
},
|
|
cli.StringFlag{
|
|
Name: "transport_address",
|
|
EnvVar: "MICRO_TRANSPORT_ADDRESS",
|
|
Usage: "Comma-separated list of transport addresses",
|
|
},
|
|
|
|
// logging flags
|
|
cli.BoolFlag{
|
|
Name: "logtostderr",
|
|
Usage: "log to standard error instead of files",
|
|
},
|
|
cli.BoolFlag{
|
|
Name: "alsologtostderr",
|
|
Usage: "log to standard error as well as files",
|
|
},
|
|
cli.StringFlag{
|
|
Name: "log_dir",
|
|
Usage: "log files will be written to this directory instead of the default temporary directory",
|
|
},
|
|
cli.StringFlag{
|
|
Name: "stderrthreshold",
|
|
Usage: "logs at or above this threshold go to stderr",
|
|
},
|
|
cli.StringFlag{
|
|
Name: "v",
|
|
Usage: "log level for V logs",
|
|
},
|
|
cli.StringFlag{
|
|
Name: "vmodule",
|
|
Usage: "comma-separated list of pattern=N settings for file-filtered logging",
|
|
},
|
|
cli.StringFlag{
|
|
Name: "log_backtrace_at",
|
|
Usage: "when logging hits line file:N, emit a stack trace",
|
|
},
|
|
}
|
|
|
|
DefaultBrokers = map[string]func([]string, ...broker.Option) broker.Broker{
|
|
"http": broker.NewBroker,
|
|
}
|
|
|
|
DefaultRegistries = map[string]func([]string, ...registry.Option) registry.Registry{
|
|
"consul": registry.NewRegistry,
|
|
}
|
|
|
|
DefaultSelectors = map[string]func(...selector.Option) selector.Selector{
|
|
"random": selector.NewSelector,
|
|
}
|
|
|
|
DefaultTransports = map[string]func([]string, ...transport.Option) transport.Transport{
|
|
"http": transport.NewTransport,
|
|
}
|
|
)
|
|
|
|
func init() {
|
|
rand.Seed(time.Now().Unix())
|
|
help := cli.HelpPrinter
|
|
cli.HelpPrinter = func(writer io.Writer, templ string, data interface{}) {
|
|
help(writer, templ, data)
|
|
os.Exit(0)
|
|
}
|
|
}
|
|
|
|
func newCmd(opts ...Option) Cmd {
|
|
options := Options{
|
|
Broker: &broker.DefaultBroker,
|
|
Client: &client.DefaultClient,
|
|
Registry: ®istry.DefaultRegistry,
|
|
Server: &server.DefaultServer,
|
|
Selector: &selector.DefaultSelector,
|
|
Transport: &transport.DefaultTransport,
|
|
|
|
Brokers: DefaultBrokers,
|
|
Registries: DefaultRegistries,
|
|
Selectors: DefaultSelectors,
|
|
Transports: DefaultTransports,
|
|
}
|
|
|
|
for _, o := range opts {
|
|
o(&options)
|
|
}
|
|
|
|
if len(options.Description) == 0 {
|
|
options.Description = "a go-micro service"
|
|
}
|
|
|
|
cmd := new(cmd)
|
|
cmd.opts = options
|
|
cmd.app = cli.NewApp()
|
|
cmd.app.Name = cmd.opts.Name
|
|
cmd.app.Version = cmd.opts.Version
|
|
cmd.app.Usage = cmd.opts.Description
|
|
cmd.app.Before = cmd.Before
|
|
cmd.app.Flags = DefaultFlags
|
|
cmd.app.Action = func(c *cli.Context) {}
|
|
|
|
if len(options.Version) == 0 {
|
|
cmd.app.HideVersion = true
|
|
}
|
|
|
|
return cmd
|
|
}
|
|
|
|
func (c *cmd) App() *cli.App {
|
|
return c.app
|
|
}
|
|
|
|
func (c *cmd) Options() Options {
|
|
return c.opts
|
|
}
|
|
|
|
func (c *cmd) Before(ctx *cli.Context) error {
|
|
// Due to logger issues with glog, we need to do this
|
|
os.Args = os.Args[:1]
|
|
flag.Set("logtostderr", fmt.Sprintf("%v", ctx.Bool("logtostderr")))
|
|
flag.Set("alsologtostderr", fmt.Sprintf("%v", ctx.Bool("alsologtostderr")))
|
|
flag.Set("stderrthreshold", ctx.String("stderrthreshold"))
|
|
flag.Set("log_backtrace_at", ctx.String("log_backtrace_at"))
|
|
flag.Set("log_dir", ctx.String("log_dir"))
|
|
flag.Set("vmodule", ctx.String("vmodule"))
|
|
flag.Set("v", ctx.String("v"))
|
|
flag.Parse()
|
|
|
|
// If flags are set then use them otherwise do nothing
|
|
var serverOpts []server.Option
|
|
var clientOpts []client.Option
|
|
|
|
// Set the broker
|
|
if len(ctx.String("broker")) > 0 {
|
|
if b, ok := c.opts.Brokers[ctx.String("broker")]; ok {
|
|
n := b(strings.Split(ctx.String("broker_address"), ","))
|
|
c.opts.Broker = &n
|
|
} else {
|
|
return fmt.Errorf("Broker %s not found", ctx.String("broker"))
|
|
}
|
|
|
|
serverOpts = append(serverOpts, server.Broker(*c.opts.Broker))
|
|
clientOpts = append(clientOpts, client.Broker(*c.opts.Broker))
|
|
}
|
|
|
|
// Set the registry
|
|
if len(ctx.String("registry")) > 0 {
|
|
if r, ok := c.opts.Registries[ctx.String("registry")]; ok {
|
|
n := r(strings.Split(ctx.String("registry_address"), ","))
|
|
c.opts.Registry = &n
|
|
} else {
|
|
return fmt.Errorf("Registry %s not found", ctx.String("registry"))
|
|
}
|
|
|
|
serverOpts = append(serverOpts, server.Registry(*c.opts.Registry))
|
|
clientOpts = append(clientOpts, client.Registry(*c.opts.Registry))
|
|
}
|
|
|
|
// Set the selector
|
|
if len(ctx.String("selector")) > 0 {
|
|
if s, ok := c.opts.Selectors[ctx.String("selector")]; ok {
|
|
n := s(selector.Registry(*c.opts.Registry))
|
|
c.opts.Selector = &n
|
|
} else {
|
|
return fmt.Errorf("Selector %s not found", ctx.String("selector"))
|
|
}
|
|
|
|
// No server option here. Should there be?
|
|
clientOpts = append(clientOpts, client.Selector(*c.opts.Selector))
|
|
}
|
|
|
|
// Set the transport
|
|
if len(ctx.String("transport")) > 0 {
|
|
if t, ok := c.opts.Transports[ctx.String("transport")]; ok {
|
|
n := t(strings.Split(ctx.String("transport_address"), ","))
|
|
c.opts.Transport = &n
|
|
} else {
|
|
return fmt.Errorf("Transport %s not found", ctx.String("transport"))
|
|
}
|
|
|
|
serverOpts = append(serverOpts, server.Transport(*c.opts.Transport))
|
|
clientOpts = append(clientOpts, client.Transport(*c.opts.Transport))
|
|
}
|
|
|
|
// Parse the server options
|
|
metadata := make(map[string]string)
|
|
for _, d := range ctx.StringSlice("server_metadata") {
|
|
var key, val string
|
|
parts := strings.Split(d, "=")
|
|
key = parts[0]
|
|
if len(parts) > 1 {
|
|
val = strings.Join(parts[1:], "=")
|
|
}
|
|
metadata[key] = val
|
|
}
|
|
|
|
if len(metadata) > 0 {
|
|
serverOpts = append(serverOpts, server.Metadata(metadata))
|
|
}
|
|
|
|
if len(ctx.String("server_name")) > 0 {
|
|
serverOpts = append(serverOpts, server.Name(ctx.String("server_name")))
|
|
}
|
|
|
|
if len(ctx.String("server_version")) > 0 {
|
|
serverOpts = append(serverOpts, server.Version(ctx.String("server_version")))
|
|
}
|
|
|
|
if len(ctx.String("server_id")) > 0 {
|
|
serverOpts = append(serverOpts, server.Id(ctx.String("server_id")))
|
|
}
|
|
|
|
if len(ctx.String("server_address")) > 0 {
|
|
serverOpts = append(serverOpts, server.Address(ctx.String("server_address")))
|
|
}
|
|
|
|
if len(ctx.String("server_advertise")) > 0 {
|
|
serverOpts = append(serverOpts, server.Advertise(ctx.String("server_advertise")))
|
|
}
|
|
|
|
// We have some command line opts for the server.
|
|
// Lets set it up
|
|
if len(serverOpts) > 0 {
|
|
(*c.opts.Server).Init(serverOpts...)
|
|
}
|
|
|
|
// Use an init option?
|
|
if len(clientOpts) > 0 {
|
|
*c.opts.Client = client.NewClient(clientOpts...)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *cmd) Init(opts ...Option) {
|
|
for _, o := range opts {
|
|
o(&c.opts)
|
|
}
|
|
c.app.Name = c.opts.Name
|
|
c.app.Version = c.opts.Version
|
|
c.app.Usage = c.opts.Description
|
|
c.app.RunAndExitOnError()
|
|
}
|
|
|
|
func Init(opts ...Option) {
|
|
DefaultCmd.Init(opts...)
|
|
}
|
|
|
|
func NewCmd(opts ...Option) Cmd {
|
|
return newCmd(opts...)
|
|
}
|