cleanup

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

test_server/graceful_shutdown/graceful_shutdown.go

@@ -0,0 +1,117 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	sgrpc "go.unistack.org/micro-server-grpc/v3"
+	"go.unistack.org/micro/v3"
+	"go.unistack.org/micro/v3/server"
+	grpc "google.golang.org/grpc"
+	emptypb "google.golang.org/protobuf/types/known/emptypb"
+)
+
+func main() {
+	switch os.Args[1] {
+	case "server":
+		TestServer()
+	case "client":
+		TestClient()
+	}
+}
+
+type serv struct {
+	UnimplementedTestServiceServer
+}
+
+func (s *serv) DoWork(ctx context.Context, in *emptypb.Empty) (*WorkResponse, error) {
+	fmt.Println("Starting long-running operation")
+	time.Sleep(4 * time.Second)
+	select {
+	case <-ctx.Done():
+		fmt.Println("Operation interrupted")
+		return nil, ctx.Err()
+	default:
+		fmt.Println("Operation completed")
+		return &WorkResponse{Message: "Work done"}, nil
+	}
+}
+
+func startServer(ctx context.Context) {
+	s := sgrpc.NewServer(server.Name("Service"), server.Address("localhost:1234"))
+	svc := micro.NewService(
+		micro.Context(ctx),
+		micro.Server(s),
+	)
+	svc.Init()
+	RegisterTestServiceServer(s.GRPCServer(), &serv{})
+
+	go func() {
+		fmt.Printf("wait for ctx.Done\n")
+		<-ctx.Done()
+		fmt.Printf("wait for Stop\n")
+		svc.Stop(ctx)
+		fmt.Printf("Stopped\n")
+	}()
+
+	fmt.Printf("svc Run\n")
+	svc.Run()
+	fmt.Printf("svc End\n")
+}
+
+func TestClient() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	log.Printf("create grpc conn\n")
+	conn, _ := grpc.Dial("localhost:1234", grpc.WithInsecure(), grpc.WithBlock())
+	defer conn.Close()
+	cli := NewTestServiceClient(conn)
+
+	replyCh := make(chan string)
+	go func() {
+		resp, err := cli.DoWork(ctx, &emptypb.Empty{})
+		if err != nil {
+			fmt.Println("Client call failed:", err)
+			replyCh <- ""
+		} else {
+			replyCh <- resp.Message
+		}
+	}()
+
+	p, _ := os.FindProcess(os.Getpid())
+	_ = p
+	//_ = p.Signal(syscall.SIGTERM)
+
+	select {
+	case reply := <-replyCh:
+		if reply != "Work done" {
+			log.Printf("Expected reply 'Work done', got '%s'\n", reply)
+		} else {
+			log.Printf("all fine\n")
+		}
+	case <-ctx.Done():
+		log.Printf("Request was not completed\n")
+	}
+}
+
+func TestServer() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
+	go func() {
+		sigReceived := <-sig
+		fmt.Printf("handle signal %v, exiting\n", sigReceived)
+		cancel()
+	}()
+
+	log.Printf("run server\n")
+	startServer(ctx)
+}

test_server/graceful_shutdown/testservice.pb.go

@@ -0,0 +1,154 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.31.0
+// 	protoc        v5.28.2
+// source: testservice.proto
+
+package main
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	emptypb "google.golang.org/protobuf/types/known/emptypb"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type WorkResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Message string `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+}
+
+func (x *WorkResponse) Reset() {
+	*x = WorkResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_testservice_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *WorkResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*WorkResponse) ProtoMessage() {}
+
+func (x *WorkResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_testservice_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use WorkResponse.ProtoReflect.Descriptor instead.
+func (*WorkResponse) Descriptor() ([]byte, []int) {
+	return file_testservice_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *WorkResponse) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+var File_testservice_proto protoreflect.FileDescriptor
+
+var file_testservice_proto_rawDesc = []byte{
+	0x0a, 0x11, 0x74, 0x65, 0x73, 0x74, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x2e, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x12, 0x07, 0x68, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x1a, 0x1b, 0x67, 0x6f,
+	0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x65, 0x6d,
+	0x70, 0x74, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x28, 0x0a, 0x0c, 0x57, 0x6f, 0x72,
+	0x6b, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x18, 0x0a, 0x07, 0x6d, 0x65, 0x73,
+	0x73, 0x61, 0x67, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x6d, 0x65, 0x73, 0x73,
+	0x61, 0x67, 0x65, 0x32, 0x46, 0x0a, 0x0b, 0x54, 0x65, 0x73, 0x74, 0x53, 0x65, 0x72, 0x76, 0x69,
+	0x63, 0x65, 0x12, 0x37, 0x0a, 0x06, 0x44, 0x6f, 0x57, 0x6f, 0x72, 0x6b, 0x12, 0x16, 0x2e, 0x67,
+	0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x45,
+	0x6d, 0x70, 0x74, 0x79, 0x1a, 0x15, 0x2e, 0x68, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x2e, 0x57,
+	0x6f, 0x72, 0x6b, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x24, 0x5a, 0x22, 0x70,
+	0x61, 0x74, 0x68, 0x2f, 0x74, 0x6f, 0x2f, 0x79, 0x6f, 0x75, 0x72, 0x6d, 0x6f, 0x64, 0x75, 0x6c,
+	0x65, 0x2f, 0x68, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x3b, 0x68, 0x61, 0x6e, 0x64, 0x6c, 0x65,
+	0x72, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_testservice_proto_rawDescOnce sync.Once
+	file_testservice_proto_rawDescData = file_testservice_proto_rawDesc
+)
+
+func file_testservice_proto_rawDescGZIP() []byte {
+	file_testservice_proto_rawDescOnce.Do(func() {
+		file_testservice_proto_rawDescData = protoimpl.X.CompressGZIP(file_testservice_proto_rawDescData)
+	})
+	return file_testservice_proto_rawDescData
+}
+
+var file_testservice_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_testservice_proto_goTypes = []interface{}{
+	(*WorkResponse)(nil),  // 0: handler.WorkResponse
+	(*emptypb.Empty)(nil), // 1: google.protobuf.Empty
+}
+var file_testservice_proto_depIdxs = []int32{
+	1, // 0: handler.TestService.DoWork:input_type -> google.protobuf.Empty
+	0, // 1: handler.TestService.DoWork:output_type -> handler.WorkResponse
+	1, // [1:2] is the sub-list for method output_type
+	0, // [0:1] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_testservice_proto_init() }
+func file_testservice_proto_init() {
+	if File_testservice_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_testservice_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*WorkResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_testservice_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_testservice_proto_goTypes,
+		DependencyIndexes: file_testservice_proto_depIdxs,
+		MessageInfos:      file_testservice_proto_msgTypes,
+	}.Build()
+	File_testservice_proto = out.File
+	file_testservice_proto_rawDesc = nil
+	file_testservice_proto_goTypes = nil
+	file_testservice_proto_depIdxs = nil
+}

test_server/graceful_shutdown/testservice.proto

@@ -0,0 +1,13 @@
+syntax = "proto3";
+
+package main;
+
+import "google/protobuf/empty.proto";
+
+service TestService {
+    rpc DoWork (google.protobuf.Empty) returns (WorkResponse);
+}
+
+message WorkResponse {
+    string message = 1;
+}

test_server/graceful_shutdown/testservice_grpc.pb.go

@@ -0,0 +1,122 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v5.28.2
+// source: testservice.proto
+
+package main
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+	emptypb "google.golang.org/protobuf/types/known/emptypb"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	TestService_DoWork_FullMethodName = "/handler.TestService/DoWork"
+)
+
+// TestServiceClient is the client API for TestService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type TestServiceClient interface {
+	DoWork(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*WorkResponse, error)
+}
+
+type testServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewTestServiceClient(cc grpc.ClientConnInterface) TestServiceClient {
+	return &testServiceClient{cc}
+}
+
+func (c *testServiceClient) DoWork(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*WorkResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(WorkResponse)
+	err := c.cc.Invoke(ctx, TestService_DoWork_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// TestServiceServer is the server API for TestService service.
+// All implementations must embed UnimplementedTestServiceServer
+// for forward compatibility.
+type TestServiceServer interface {
+	DoWork(context.Context, *emptypb.Empty) (*WorkResponse, error)
+	mustEmbedUnimplementedTestServiceServer()
+}
+
+// UnimplementedTestServiceServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedTestServiceServer struct{}
+
+func (UnimplementedTestServiceServer) DoWork(context.Context, *emptypb.Empty) (*WorkResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method DoWork not implemented")
+}
+func (UnimplementedTestServiceServer) mustEmbedUnimplementedTestServiceServer() {}
+func (UnimplementedTestServiceServer) testEmbeddedByValue()                     {}
+
+// UnsafeTestServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to TestServiceServer will
+// result in compilation errors.
+type UnsafeTestServiceServer interface {
+	mustEmbedUnimplementedTestServiceServer()
+}
+
+func RegisterTestServiceServer(s grpc.ServiceRegistrar, srv TestServiceServer) {
+	// If the following call pancis, it indicates UnimplementedTestServiceServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&TestService_ServiceDesc, srv)
+}
+
+func _TestService_DoWork_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(emptypb.Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServiceServer).DoWork(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: TestService_DoWork_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServiceServer).DoWork(ctx, req.(*emptypb.Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// TestService_ServiceDesc is the grpc.ServiceDesc for TestService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var TestService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "handler.TestService",
+	HandlerType: (*TestServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "DoWork",
+			Handler:    _TestService_DoWork_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "testservice.proto",
+}