func makeSumEndpoint(svc server.AddService) endpoint.Endpoint {
return func(ctx context.Context, request interface{}) (interface{}, error) {
req := request.(*server.SumRequest)
v := svc.Sum(req.A, req.B)
return server.SumResponse{V: v}, nil
}
}
func makeConcatEndpoint(svc server.AddService) endpoint.Endpoint {
return func(ctx context.Context, request interface{}) (interface{}, error) {
r := request.(io.Reader)
var req server.ConcatRequest
if err := json.NewDecoder(r).Decode(&req); err != nil {
return nil, err
}
v := svc.Concat(req.A, req.B)
return json.Marshal(v)
}
}
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)
}
}