コード例 #1
0
ファイル: main.go プロジェクト: crezam/kit
func addsvcFactory(makeEndpoint func(addsvc.Service) endpoint.Endpoint, tracer stdopentracing.Tracer, logger log.Logger) sd.Factory {
	return func(instance string) (endpoint.Endpoint, io.Closer, error) {
		// We could just as easily use the HTTP or Thrift client package to make
		// the connection to addsvc. We've chosen gRPC arbitrarily. Note that
		// the transport is an implementation detail: it doesn't leak out of
		// this function. Nice!

		conn, err := grpc.Dial(instance, grpc.WithInsecure())
		if err != nil {
			return nil, nil, err
		}
		service := addsvcgrpcclient.New(conn, tracer, logger)
		endpoint := makeEndpoint(service)

		// Notice that the addsvc gRPC client converts the connection to a
		// complete addsvc, and we just throw away everything except the method
		// we're interested in. A smarter factory would mux multiple methods
		// over the same connection. But that would require more work to manage
		// the returned io.Closer, e.g. reference counting. Since this is for
		// the purposes of demonstration, we'll just keep it simple.

		return endpoint, conn, nil
	}
}
コード例 #2
0
ファイル: main.go プロジェクト: nimmen/kit
func main() {
	var (
		transport        = flag.String("transport", "httpjson", "httpjson, grpc, netrpc, thrift")
		httpAddr         = flag.String("http.addr", "localhost:8001", "Address for HTTP (JSON) server")
		grpcAddr         = flag.String("grpc.addr", "localhost:8002", "Address for gRPC server")
		netrpcAddr       = flag.String("netrpc.addr", "localhost:8003", "Address for net/rpc server")
		thriftAddr       = flag.String("thrift.addr", "localhost:8004", "Address for Thrift server")
		thriftProtocol   = flag.String("thrift.protocol", "binary", "binary, compact, json, simplejson")
		thriftBufferSize = flag.Int("thrift.buffer.size", 0, "0 for unbuffered")
		thriftFramed     = flag.Bool("thrift.framed", false, "true to enable framing")
	)
	flag.Parse()
	if len(os.Args) < 4 {
		fmt.Fprintf(os.Stderr, "\n%s [flags] method arg1 arg2\n\n", filepath.Base(os.Args[0]))
		flag.Usage()
		os.Exit(1)
	}

	root := context.Background()
	method, s1, s2 := flag.Arg(0), flag.Arg(1), flag.Arg(2)

	var logger log.Logger
	logger = log.NewLogfmtLogger(os.Stdout)
	logger = log.NewContext(logger).With("caller", log.DefaultCaller)
	logger = log.NewContext(logger).With("transport", *transport)

	var svc server.AddService
	switch *transport {
	case "grpc":
		cc, err := grpc.Dial(*grpcAddr)
		if err != nil {
			_ = logger.Log("err", err)
			os.Exit(1)
		}
		defer cc.Close()
		svc = grpcclient.New(root, cc, logger)

	case "httpjson":
		rawurl := *httpAddr
		if !strings.HasPrefix("http", rawurl) {
			rawurl = "http://" + rawurl
		}
		baseurl, err := url.Parse(rawurl)
		if err != nil {
			_ = logger.Log("err", err)
			os.Exit(1)
		}
		svc = httpjsonclient.New(root, baseurl, logger, nil)

	case "netrpc":
		cli, err := rpc.DialHTTP("tcp", *netrpcAddr)
		if err != nil {
			_ = logger.Log("err", err)
			os.Exit(1)
		}
		defer cli.Close()
		svc = netrpcclient.New(cli, logger)

	case "thrift":
		var protocolFactory thrift.TProtocolFactory
		switch *thriftProtocol {
		case "compact":
			protocolFactory = thrift.NewTCompactProtocolFactory()
		case "simplejson":
			protocolFactory = thrift.NewTSimpleJSONProtocolFactory()
		case "json":
			protocolFactory = thrift.NewTJSONProtocolFactory()
		case "binary", "":
			protocolFactory = thrift.NewTBinaryProtocolFactoryDefault()
		default:
			_ = logger.Log("protocol", *thriftProtocol, "err", "invalid protocol")
			os.Exit(1)
		}
		var transportFactory thrift.TTransportFactory
		if *thriftBufferSize > 0 {
			transportFactory = thrift.NewTBufferedTransportFactory(*thriftBufferSize)
		} else {
			transportFactory = thrift.NewTTransportFactory()
		}
		if *thriftFramed {
			transportFactory = thrift.NewTFramedTransportFactory(transportFactory)
		}
		transportSocket, err := thrift.NewTSocket(*thriftAddr)
		if err != nil {
			_ = logger.Log("during", "thrift.NewTSocket", "err", err)
			os.Exit(1)
		}
		trans := transportFactory.GetTransport(transportSocket)
		defer trans.Close()
		if err := trans.Open(); err != nil {
			_ = logger.Log("during", "thrift transport.Open", "err", err)
			os.Exit(1)
		}
		cli := thriftadd.NewAddServiceClientFactory(trans, protocolFactory)
		svc = thriftclient.New(cli, logger)

	default:
		_ = logger.Log("err", "invalid transport")
		os.Exit(1)
	}

	begin := time.Now()
	switch method {
	case "sum":
		a, _ := strconv.Atoi(s1)
		b, _ := strconv.Atoi(s2)
		v := svc.Sum(a, b)
		_ = logger.Log("method", "sum", "a", a, "b", b, "v", v, "took", time.Since(begin))

	case "concat":
		a, b := s1, s2
		v := svc.Concat(a, b)
		_ = logger.Log("method", "concat", "a", a, "b", b, "v", v, "took", time.Since(begin))

	default:
		_ = logger.Log("err", "invalid method "+method)
		os.Exit(1)
	}
}
コード例 #3
0
ファイル: main.go プロジェクト: crezam/kit
func main() {
	// The addcli presumes no service discovery system, and expects users to
	// provide the direct address of an addsvc. This presumption is reflected in
	// the addcli binary and the the client packages: the -transport.addr flags
	// and various client constructors both expect host:port strings. For an
	// example service with a client built on top of a service discovery system,
	// see profilesvc.

	var (
		httpAddr         = flag.String("http.addr", "", "HTTP address of addsvc")
		grpcAddr         = flag.String("grpc.addr", "", "gRPC (HTTP) address of addsvc")
		thriftAddr       = flag.String("thrift.addr", "", "Thrift address of addsvc")
		thriftProtocol   = flag.String("thrift.protocol", "binary", "binary, compact, json, simplejson")
		thriftBufferSize = flag.Int("thrift.buffer.size", 0, "0 for unbuffered")
		thriftFramed     = flag.Bool("thrift.framed", false, "true to enable framing")
		zipkinAddr       = flag.String("zipkin.addr", "", "Enable Zipkin tracing via a Kafka Collector host:port")
		appdashAddr      = flag.String("appdash.addr", "", "Enable Appdash tracing via an Appdash server host:port")
		lightstepToken   = flag.String("lightstep.token", "", "Enable LightStep tracing via a LightStep access token")
		method           = flag.String("method", "sum", "sum, concat")
	)
	flag.Parse()

	if len(flag.Args()) != 2 {
		fmt.Fprintf(os.Stderr, "usage: addcli [flags] <a> <b>\n")
		os.Exit(1)
	}

	// This is a demonstration client, which supports multiple tracers.
	// Your clients will probably just use one tracer.
	var tracer stdopentracing.Tracer
	{
		if *zipkinAddr != "" {
			collector, err := zipkin.NewKafkaCollector(
				strings.Split(*zipkinAddr, ","),
				zipkin.KafkaLogger(log.NewNopLogger()),
			)
			if err != nil {
				fmt.Fprintf(os.Stderr, "%v\n", err)
				os.Exit(1)
			}
			tracer, err = zipkin.NewTracer(
				zipkin.NewRecorder(collector, false, "localhost:8000", "addcli"),
			)
			if err != nil {
				fmt.Fprintf(os.Stderr, "%v\n", err)
				os.Exit(1)
			}
		} else if *appdashAddr != "" {
			tracer = appdashot.NewTracer(appdash.NewRemoteCollector(*appdashAddr))
		} else if *lightstepToken != "" {
			tracer = lightstep.NewTracer(lightstep.Options{
				AccessToken: *lightstepToken,
			})
			defer lightstep.FlushLightStepTracer(tracer)
		} else {
			tracer = stdopentracing.GlobalTracer() // no-op
		}
	}

	// This is a demonstration client, which supports multiple transports.
	// Your clients will probably just define and stick with 1 transport.

	var (
		service addsvc.Service
		err     error
	)
	if *httpAddr != "" {
		service, err = httpclient.New(*httpAddr, tracer, log.NewNopLogger())
	} else if *grpcAddr != "" {
		conn, err := grpc.Dial(*grpcAddr, grpc.WithInsecure(), grpc.WithTimeout(time.Second))
		if err != nil {
			fmt.Fprintf(os.Stderr, "error: %v", err)
			os.Exit(1)
		}
		defer conn.Close()
		service = grpcclient.New(conn, tracer, log.NewNopLogger())
	} else if *thriftAddr != "" {
		// It's necessary to do all of this construction in the func main,
		// because (among other reasons) we need to control the lifecycle of the
		// Thrift transport, i.e. close it eventually.
		var protocolFactory thrift.TProtocolFactory
		switch *thriftProtocol {
		case "compact":
			protocolFactory = thrift.NewTCompactProtocolFactory()
		case "simplejson":
			protocolFactory = thrift.NewTSimpleJSONProtocolFactory()
		case "json":
			protocolFactory = thrift.NewTJSONProtocolFactory()
		case "binary", "":
			protocolFactory = thrift.NewTBinaryProtocolFactoryDefault()
		default:
			fmt.Fprintf(os.Stderr, "error: invalid protocol %q\n", *thriftProtocol)
			os.Exit(1)
		}
		var transportFactory thrift.TTransportFactory
		if *thriftBufferSize > 0 {
			transportFactory = thrift.NewTBufferedTransportFactory(*thriftBufferSize)
		} else {
			transportFactory = thrift.NewTTransportFactory()
		}
		if *thriftFramed {
			transportFactory = thrift.NewTFramedTransportFactory(transportFactory)
		}
		transportSocket, err := thrift.NewTSocket(*thriftAddr)
		if err != nil {
			fmt.Fprintf(os.Stderr, "error: %v\n", err)
			os.Exit(1)
		}
		transport := transportFactory.GetTransport(transportSocket)
		if err := transport.Open(); err != nil {
			fmt.Fprintf(os.Stderr, "error: %v\n", err)
			os.Exit(1)
		}
		defer transport.Close()
		client := thriftadd.NewAddServiceClientFactory(transport, protocolFactory)
		service = thriftclient.New(client)
	} else {
		fmt.Fprintf(os.Stderr, "error: no remote address specified\n")
		os.Exit(1)
	}
	if err != nil {
		fmt.Fprintf(os.Stderr, "error: %v\n", err)
		os.Exit(1)
	}

	switch *method {
	case "sum":
		a, _ := strconv.ParseInt(flag.Args()[0], 10, 64)
		b, _ := strconv.ParseInt(flag.Args()[1], 10, 64)
		v, err := service.Sum(context.Background(), int(a), int(b))
		if err != nil {
			fmt.Fprintf(os.Stderr, "error: %v\n", err)
			os.Exit(1)
		}
		fmt.Fprintf(os.Stdout, "%d + %d = %d\n", a, b, v)

	case "concat":
		a := flag.Args()[0]
		b := flag.Args()[1]
		v, err := service.Concat(context.Background(), a, b)
		if err != nil {
			fmt.Fprintf(os.Stderr, "error: %v\n", err)
			os.Exit(1)
		}
		fmt.Fprintf(os.Stdout, "%q + %q = %q\n", a, b, v)

	default:
		fmt.Fprintf(os.Stderr, "error: invalid method %q\n", method)
		os.Exit(1)
	}
}