create addition service using go

addition-service/generated/generated/calculator.pb.go

+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.10
+// 	protoc        v6.33.0
+// source: calculator.proto
+
+package generated
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+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 Numbers struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	A             int32                  `protobuf:"varint,1,opt,name=a,proto3" json:"a,omitempty"`
+	B             int32                  `protobuf:"varint,2,opt,name=b,proto3" json:"b,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Numbers) Reset() {
+	*x = Numbers{}
+	mi := &file_calculator_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Numbers) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Numbers) ProtoMessage() {}
+
+func (x *Numbers) ProtoReflect() protoreflect.Message {
+	mi := &file_calculator_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Numbers.ProtoReflect.Descriptor instead.
+func (*Numbers) Descriptor() ([]byte, []int) {
+	return file_calculator_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Numbers) GetA() int32 {
+	if x != nil {
+		return x.A
+	}
+	return 0
+}
+
+func (x *Numbers) GetB() int32 {
+	if x != nil {
+		return x.B
+	}
+	return 0
+}
+
+type Result struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Value         int32                  `protobuf:"varint,1,opt,name=value,proto3" json:"value,omitempty"`
+	Operation     string                 `protobuf:"bytes,2,opt,name=operation,proto3" json:"operation,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Result) Reset() {
+	*x = Result{}
+	mi := &file_calculator_proto_msgTypes[1]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Result) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Result) ProtoMessage() {}
+
+func (x *Result) ProtoReflect() protoreflect.Message {
+	mi := &file_calculator_proto_msgTypes[1]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Result.ProtoReflect.Descriptor instead.
+func (*Result) Descriptor() ([]byte, []int) {
+	return file_calculator_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *Result) GetValue() int32 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
+func (x *Result) GetOperation() string {
+	if x != nil {
+		return x.Operation
+	}
+	return ""
+}
+
+type OperationHistory struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	ServiceName   string                 `protobuf:"bytes,1,opt,name=service_name,json=serviceName,proto3" json:"service_name,omitempty"`
+	Operations    []*Operation           `protobuf:"bytes,2,rep,name=operations,proto3" json:"operations,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *OperationHistory) Reset() {
+	*x = OperationHistory{}
+	mi := &file_calculator_proto_msgTypes[2]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *OperationHistory) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*OperationHistory) ProtoMessage() {}
+
+func (x *OperationHistory) ProtoReflect() protoreflect.Message {
+	mi := &file_calculator_proto_msgTypes[2]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use OperationHistory.ProtoReflect.Descriptor instead.
+func (*OperationHistory) Descriptor() ([]byte, []int) {
+	return file_calculator_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *OperationHistory) GetServiceName() string {
+	if x != nil {
+		return x.ServiceName
+	}
+	return ""
+}
+
+func (x *OperationHistory) GetOperations() []*Operation {
+	if x != nil {
+		return x.Operations
+	}
+	return nil
+}
+
+type Operation struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Type          string                 `protobuf:"bytes,1,opt,name=type,proto3" json:"type,omitempty"`
+	A             int32                  `protobuf:"varint,2,opt,name=a,proto3" json:"a,omitempty"`
+	B             int32                  `protobuf:"varint,3,opt,name=b,proto3" json:"b,omitempty"`
+	Result        int32                  `protobuf:"varint,4,opt,name=result,proto3" json:"result,omitempty"`
+	Timestamp     string                 `protobuf:"bytes,5,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Operation) Reset() {
+	*x = Operation{}
+	mi := &file_calculator_proto_msgTypes[3]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Operation) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Operation) ProtoMessage() {}
+
+func (x *Operation) ProtoReflect() protoreflect.Message {
+	mi := &file_calculator_proto_msgTypes[3]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Operation.ProtoReflect.Descriptor instead.
+func (*Operation) Descriptor() ([]byte, []int) {
+	return file_calculator_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *Operation) GetType() string {
+	if x != nil {
+		return x.Type
+	}
+	return ""
+}
+
+func (x *Operation) GetA() int32 {
+	if x != nil {
+		return x.A
+	}
+	return 0
+}
+
+func (x *Operation) GetB() int32 {
+	if x != nil {
+		return x.B
+	}
+	return 0
+}
+
+func (x *Operation) GetResult() int32 {
+	if x != nil {
+		return x.Result
+	}
+	return 0
+}
+
+func (x *Operation) GetTimestamp() string {
+	if x != nil {
+		return x.Timestamp
+	}
+	return ""
+}
+
+type Empty struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Empty) Reset() {
+	*x = Empty{}
+	mi := &file_calculator_proto_msgTypes[4]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Empty) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Empty) ProtoMessage() {}
+
+func (x *Empty) ProtoReflect() protoreflect.Message {
+	mi := &file_calculator_proto_msgTypes[4]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Empty.ProtoReflect.Descriptor instead.
+func (*Empty) Descriptor() ([]byte, []int) {
+	return file_calculator_proto_rawDescGZIP(), []int{4}
+}
+
+var File_calculator_proto protoreflect.FileDescriptor
+
+const file_calculator_proto_rawDesc = "" +
+	"\n" +
+	"\x10calculator.proto\x12\n" +
+	"calculator\"%\n" +
+	"\aNumbers\x12\f\n" +
+	"\x01a\x18\x01 \x01(\x05R\x01a\x12\f\n" +
+	"\x01b\x18\x02 \x01(\x05R\x01b\"<\n" +
+	"\x06Result\x12\x14\n" +
+	"\x05value\x18\x01 \x01(\x05R\x05value\x12\x1c\n" +
+	"\toperation\x18\x02 \x01(\tR\toperation\"l\n" +
+	"\x10OperationHistory\x12!\n" +
+	"\fservice_name\x18\x01 \x01(\tR\vserviceName\x125\n" +
+	"\n" +
+	"operations\x18\x02 \x03(\v2\x15.calculator.OperationR\n" +
+	"operations\"q\n" +
+	"\tOperation\x12\x12\n" +
+	"\x04type\x18\x01 \x01(\tR\x04type\x12\f\n" +
+	"\x01a\x18\x02 \x01(\x05R\x01a\x12\f\n" +
+	"\x01b\x18\x03 \x01(\x05R\x01b\x12\x16\n" +
+	"\x06result\x18\x04 \x01(\x05R\x06result\x12\x1c\n" +
+	"\ttimestamp\x18\x05 \x01(\tR\ttimestamp\"\a\n" +
+	"\x05Empty2\xbb\x01\n" +
+	"\n" +
+	"Calculator\x12.\n" +
+	"\x03Add\x12\x13.calculator.Numbers\x1a\x12.calculator.Result\x123\n" +
+	"\bMultiply\x12\x13.calculator.Numbers\x1a\x12.calculator.Result\x12H\n" +
+	"\x13GetOperationHistory\x12\x11.calculator.Empty\x1a\x1c.calculator.OperationHistory0\x01B8\n" +
+	"'com.calculator.multiplication.generatedP\x01Z\v./generatedb\x06proto3"
+
+var (
+	file_calculator_proto_rawDescOnce sync.Once
+	file_calculator_proto_rawDescData []byte
+)
+
+func file_calculator_proto_rawDescGZIP() []byte {
+	file_calculator_proto_rawDescOnce.Do(func() {
+		file_calculator_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_calculator_proto_rawDesc), len(file_calculator_proto_rawDesc)))
+	})
+	return file_calculator_proto_rawDescData
+}
+
+var file_calculator_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
+var file_calculator_proto_goTypes = []any{
+	(*Numbers)(nil),          // 0: calculator.Numbers
+	(*Result)(nil),           // 1: calculator.Result
+	(*OperationHistory)(nil), // 2: calculator.OperationHistory
+	(*Operation)(nil),        // 3: calculator.Operation
+	(*Empty)(nil),            // 4: calculator.Empty
+}
+var file_calculator_proto_depIdxs = []int32{
+	3, // 0: calculator.OperationHistory.operations:type_name -> calculator.Operation
+	0, // 1: calculator.Calculator.Add:input_type -> calculator.Numbers
+	0, // 2: calculator.Calculator.Multiply:input_type -> calculator.Numbers
+	4, // 3: calculator.Calculator.GetOperationHistory:input_type -> calculator.Empty
+	1, // 4: calculator.Calculator.Add:output_type -> calculator.Result
+	1, // 5: calculator.Calculator.Multiply:output_type -> calculator.Result
+	2, // 6: calculator.Calculator.GetOperationHistory:output_type -> calculator.OperationHistory
+	4, // [4:7] is the sub-list for method output_type
+	1, // [1:4] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_calculator_proto_init() }
+func file_calculator_proto_init() {
+	if File_calculator_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_calculator_proto_rawDesc), len(file_calculator_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   5,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_calculator_proto_goTypes,
+		DependencyIndexes: file_calculator_proto_depIdxs,
+		MessageInfos:      file_calculator_proto_msgTypes,
+	}.Build()
+	File_calculator_proto = out.File
+	file_calculator_proto_goTypes = nil
+	file_calculator_proto_depIdxs = nil
+}

addition-service/generated/generated/calculator_grpc.pb.go

+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v6.33.0
+// source: calculator.proto
+
+package generated
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// 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 (
+	Calculator_Add_FullMethodName                 = "/calculator.Calculator/Add"
+	Calculator_Multiply_FullMethodName            = "/calculator.Calculator/Multiply"
+	Calculator_GetOperationHistory_FullMethodName = "/calculator.Calculator/GetOperationHistory"
+)
+
+// CalculatorClient is the client API for Calculator 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 CalculatorClient interface {
+	Add(ctx context.Context, in *Numbers, opts ...grpc.CallOption) (*Result, error)
+	Multiply(ctx context.Context, in *Numbers, opts ...grpc.CallOption) (*Result, error)
+	GetOperationHistory(ctx context.Context, in *Empty, opts ...grpc.CallOption) (grpc.ServerStreamingClient[OperationHistory], error)
+}
+
+type calculatorClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewCalculatorClient(cc grpc.ClientConnInterface) CalculatorClient {
+	return &calculatorClient{cc}
+}
+
+func (c *calculatorClient) Add(ctx context.Context, in *Numbers, opts ...grpc.CallOption) (*Result, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Result)
+	err := c.cc.Invoke(ctx, Calculator_Add_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *calculatorClient) Multiply(ctx context.Context, in *Numbers, opts ...grpc.CallOption) (*Result, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Result)
+	err := c.cc.Invoke(ctx, Calculator_Multiply_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *calculatorClient) GetOperationHistory(ctx context.Context, in *Empty, opts ...grpc.CallOption) (grpc.ServerStreamingClient[OperationHistory], error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	stream, err := c.cc.NewStream(ctx, &Calculator_ServiceDesc.Streams[0], Calculator_GetOperationHistory_FullMethodName, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &grpc.GenericClientStream[Empty, OperationHistory]{ClientStream: stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type Calculator_GetOperationHistoryClient = grpc.ServerStreamingClient[OperationHistory]
+
+// CalculatorServer is the server API for Calculator service.
+// All implementations must embed UnimplementedCalculatorServer
+// for forward compatibility.
+type CalculatorServer interface {
+	Add(context.Context, *Numbers) (*Result, error)
+	Multiply(context.Context, *Numbers) (*Result, error)
+	GetOperationHistory(*Empty, grpc.ServerStreamingServer[OperationHistory]) error
+	mustEmbedUnimplementedCalculatorServer()
+}
+
+// UnimplementedCalculatorServer 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 UnimplementedCalculatorServer struct{}
+
+func (UnimplementedCalculatorServer) Add(context.Context, *Numbers) (*Result, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Add not implemented")
+}
+func (UnimplementedCalculatorServer) Multiply(context.Context, *Numbers) (*Result, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Multiply not implemented")
+}
+func (UnimplementedCalculatorServer) GetOperationHistory(*Empty, grpc.ServerStreamingServer[OperationHistory]) error {
+	return status.Errorf(codes.Unimplemented, "method GetOperationHistory not implemented")
+}
+func (UnimplementedCalculatorServer) mustEmbedUnimplementedCalculatorServer() {}
+func (UnimplementedCalculatorServer) testEmbeddedByValue()                    {}
+
+// UnsafeCalculatorServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to CalculatorServer will
+// result in compilation errors.
+type UnsafeCalculatorServer interface {
+	mustEmbedUnimplementedCalculatorServer()
+}
+
+func RegisterCalculatorServer(s grpc.ServiceRegistrar, srv CalculatorServer) {
+	// If the following call pancis, it indicates UnimplementedCalculatorServer 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(&Calculator_ServiceDesc, srv)
+}
+
+func _Calculator_Add_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Numbers)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CalculatorServer).Add(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Calculator_Add_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CalculatorServer).Add(ctx, req.(*Numbers))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Calculator_Multiply_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Numbers)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CalculatorServer).Multiply(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Calculator_Multiply_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CalculatorServer).Multiply(ctx, req.(*Numbers))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Calculator_GetOperationHistory_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(Empty)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(CalculatorServer).GetOperationHistory(m, &grpc.GenericServerStream[Empty, OperationHistory]{ServerStream: stream})
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type Calculator_GetOperationHistoryServer = grpc.ServerStreamingServer[OperationHistory]
+
+// Calculator_ServiceDesc is the grpc.ServiceDesc for Calculator service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Calculator_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "calculator.Calculator",
+	HandlerType: (*CalculatorServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Add",
+			Handler:    _Calculator_Add_Handler,
+		},
+		{
+			MethodName: "Multiply",
+			Handler:    _Calculator_Multiply_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "GetOperationHistory",
+			Handler:       _Calculator_GetOperationHistory_Handler,
+			ServerStreams: true,
+		},
+	},
+	Metadata: "calculator.proto",
+}

addition-service/go.mod

+module addition-service
+
+go 1.21
+
+require (
+    google.golang.org/grpc v1.59.0
+    google.golang.org/protobuf v1.31.0
+)
\ No newline at end of file

addition-service/main.go

+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"sync"
+	"time"
+
+	"addition-service/generated"
+
+	"google.golang.org/grpc"
+)
+
+type additionServer struct {
+	generated.UnimplementedCalculatorServer
+	operations []*generated.Operation
+	mutex      sync.RWMutex
+}
+
+func (s *additionServer) Add(ctx context.Context, req *generated.Numbers) (*generated.Result, error) {
+	result := req.A + req.B
+	
+	op := &generated.Operation{
+		Type:      "ADDITION",
+		A:         req.A,
+		B:         req.B,
+		Result:    result,
+		Timestamp: time.Now().Format("2006-01-02 15:04:05"),
+	}
+	
+	s.mutex.Lock()
+	s.operations = append(s.operations, op)
+	s.mutex.Unlock()
+	
+	go s.logToFile(op)
+	
+	fmt.Printf(" Addition operation: %d + %d = %d\n", req.A, req.B, result)
+	
+	return &generated.Result{
+		Value:     result,
+		Operation: "ADDITION",
+	}, nil
+}
+
+func (s *additionServer) GetOperationHistory(req *generated.Empty, stream generated.Calculator_GetOperationHistoryServer) error {
+	s.mutex.RLock()
+	defer s.mutex.RUnlock()
+	
+	history := &generated.OperationHistory{
+		ServiceName: "Addition Service",
+		Operations:  s.operations,
+	}
+	
+	if err := stream.Send(history); err != nil {
+		return err
+	}
+	
+	return nil
+}
+
+func (s *additionServer) logToFile(op *generated.Operation) {
+	file, err := os.OpenFile("operation_log.txt", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		log.Printf("Failed to open log file: %v", err)
+		return
+	}
+	defer file.Close()
+	
+	logEntry := fmt.Sprintf("[%s] %s: %d + %d = %d\n", 
+		op.Timestamp, op.Type, op.A, op.B, op.Result)
+	
+	if _, err := file.WriteString(logEntry); err != nil {
+		log.Printf("Failed to write to log file: %v", err)
+	}
+}
+
+func main() {
+	lis, err := net.Listen("tcp", ":50052")
+	if err != nil {
+		log.Fatalf("Failed to listen: %v", err)
+	}
+	
+	server := grpc.NewServer()
+	additionServer := &additionServer{
+		operations: make([]*generated.Operation, 0),
+	}
+	
+	generated.RegisterCalculatorServer(server, additionServer)
+	
+	fmt.Println(" Addition Service running on port 50052")
+	fmt.Println(" Ready to receive addition requests...")
+	
+	if err := server.Serve(lis); err != nil {
+		log.Fatalf("Failed to serve: %v", err)
+	}
+}
\ No newline at end of file

proto/calculator.proto

@@ -2,6 +2,8 @@ syntax = "proto3";
 
 package calculator;
 
+option go_package = "./generated";
+
 option java_package = "com.calculator.multiplication.generated";
 option java_multiple_files = true;