micro/cmd/cmd.go

170 lines
4.0 KiB
Go

package cmd
import (
"io"
"os"
"strings"
"text/tabwriter"
"text/template"
"github.com/codegangsta/cli"
"github.com/myodc/go-micro/broker"
"github.com/myodc/go-micro/client"
"github.com/myodc/go-micro/registry"
"github.com/myodc/go-micro/server"
"github.com/myodc/go-micro/transport"
// brokers
"github.com/myodc/go-micro/broker/http"
"github.com/myodc/go-micro/broker/nats"
// registries
"github.com/myodc/go-micro/registry/consul"
"github.com/myodc/go-micro/registry/kubernetes"
// transport
thttp "github.com/myodc/go-micro/transport/http"
tnats "github.com/myodc/go-micro/transport/nats"
"github.com/myodc/go-micro/transport/rabbitmq"
)
var (
Flags = []cli.Flag{
cli.StringFlag{
Name: "server_name",
EnvVar: "MICRO_SERVER_NAME",
Usage: "Name of the server. go.micro.srv.example",
},
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",
Value: ":0",
Usage: "Bind address for the server. 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",
Value: "http",
Usage: "Broker for pub/sub. http, nats, etc",
},
cli.StringFlag{
Name: "broker_address",
EnvVar: "MICRO_BROKER_ADDRESS",
Usage: "Comma-separated list of broker addresses",
},
cli.StringFlag{
Name: "registry",
EnvVar: "MICRO_REGISTRY",
Value: "consul",
Usage: "Registry for discovery. kubernetes, consul, etc",
},
cli.StringFlag{
Name: "registry_address",
EnvVar: "MICRO_REGISTRY_ADDRESS",
Usage: "Comma-separated list of registry addresses",
},
cli.StringFlag{
Name: "transport",
EnvVar: "MICRO_TRANSPORT",
Value: "http",
Usage: "Transport mechanism used; http, rabbitmq, etc",
},
cli.StringFlag{
Name: "transport_address",
EnvVar: "MICRO_TRANSPORT_ADDRESS",
Usage: "Comma-separated list of transport addresses",
},
}
)
func Setup(c *cli.Context) error {
bAddrs := strings.Split(c.String("broker_address"), ",")
switch c.String("broker") {
case "http":
broker.DefaultBroker = http.NewBroker(bAddrs)
case "nats":
broker.DefaultBroker = nats.NewBroker(bAddrs)
}
rAddrs := strings.Split(c.String("registry_address"), ",")
switch c.String("registry") {
case "kubernetes":
registry.DefaultRegistry = kubernetes.NewRegistry(rAddrs)
case "consul":
registry.DefaultRegistry = consul.NewRegistry(rAddrs)
}
tAddrs := strings.Split(c.String("transport_address"), ",")
switch c.String("transport") {
case "http":
transport.DefaultTransport = thttp.NewTransport(tAddrs)
case "rabbitmq":
transport.DefaultTransport = rabbitmq.NewTransport(tAddrs)
case "nats":
transport.DefaultTransport = tnats.NewTransport(tAddrs)
}
metadata := make(map[string]string)
for _, d := range c.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
}
server.DefaultServer = server.NewServer(
server.Name(c.String("server_name")),
server.Id(c.String("server_id")),
server.Address(c.String("server_address")),
server.Metadata(metadata),
)
client.DefaultClient = client.NewClient()
return nil
}
func Init() {
cli.AppHelpTemplate = `
GLOBAL OPTIONS:
{{range .Flags}}{{.}}
{{end}}
`
cli.HelpPrinter = func(writer io.Writer, templ string, data interface{}) {
w := tabwriter.NewWriter(os.Stdout, 0, 8, 1, '\t', 0)
t := template.Must(template.New("help").Parse(templ))
err := t.Execute(w, data)
if err != nil {
panic(err)
}
w.Flush()
os.Exit(2)
}
app := cli.NewApp()
app.HideVersion = true
app.Usage = "a go micro app"
app.Action = func(c *cli.Context) {}
app.Before = Setup
app.Flags = Flags
app.RunAndExitOnError()
}