Function Example

micro/example_package_test.go:26–103

()

)

func Example() {
	nc, err := nats.Connect("127.0.0.1:4222")
	if err != nil {
		log.Fatal(err)
	}
	defer nc.Close()

	// endpoint handler - in this case, HandlerFunc is used,
	// which is a built-in implementation of Handler interface
	echoHandler := func(req micro.Request) {
		req.Respond(req.Data())
	}

	// second endpoint
	incrementHandler := func(req micro.Request) {
		val, err := strconv.Atoi(string(req.Data()))
		if err != nil {
			req.Error("400", "request data should be a number", nil)
			return
		}

		responseData := val + 1
		req.Respond([]byte(strconv.Itoa(responseData)))
	}

	// third endpoint
	multiplyHandler := func(req micro.Request) {
		val, err := strconv.Atoi(string(req.Data()))
		if err != nil {
			req.Error("400", "request data should be a number", nil)
			return
		}

		responseData := val * 2
		req.Respond([]byte(strconv.Itoa(responseData)))
	}

	config := micro.Config{
		Name:        "IncrementService",
		Version:     "0.1.0",
		Description: "Increment numbers",

		// base handler - for simple services with single endpoints this is sufficient
		Endpoint: &micro.EndpointConfig{
			Subject: "echo",
			Handler: micro.HandlerFunc(echoHandler),
		},
	}
	svc, err := micro.AddService(nc, config)
	if err != nil {
		log.Fatal(err)
	}
	defer svc.Stop()

	// add a group to aggregate endpoints under common prefix
	numbers := svc.AddGroup("numbers")

	// register endpoints in a group