Initial snapshot - OpenTelemetry demo 2.1.3 -f

1 files changed, 1433 insertions, 0 deletions

diff --git a/src/product-catalog/genproto/oteldemo/demo_grpc.pb.go b/src/product-catalog/genproto/oteldemo/demo_grpc.pb.go
new file mode 100644
index 0000000..f04633a
--- /dev/null
+++ b/src/product-catalog/genproto/oteldemo/demo_grpc.pb.go
@@ -0,0 +1,1433 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v5.29.4
+// source: demo.proto
+
+package oteldemo
+
+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 (
+	CartService_AddItem_FullMethodName   = "/oteldemo.CartService/AddItem"
+	CartService_GetCart_FullMethodName   = "/oteldemo.CartService/GetCart"
+	CartService_EmptyCart_FullMethodName = "/oteldemo.CartService/EmptyCart"
+)
+
+// CartServiceClient is the client API for CartService 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 CartServiceClient interface {
+	AddItem(ctx context.Context, in *AddItemRequest, opts ...grpc.CallOption) (*Empty, error)
+	GetCart(ctx context.Context, in *GetCartRequest, opts ...grpc.CallOption) (*Cart, error)
+	EmptyCart(ctx context.Context, in *EmptyCartRequest, opts ...grpc.CallOption) (*Empty, error)
+}
+
+type cartServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewCartServiceClient(cc grpc.ClientConnInterface) CartServiceClient {
+	return &cartServiceClient{cc}
+}
+
+func (c *cartServiceClient) AddItem(ctx context.Context, in *AddItemRequest, opts ...grpc.CallOption) (*Empty, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Empty)
+	err := c.cc.Invoke(ctx, CartService_AddItem_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *cartServiceClient) GetCart(ctx context.Context, in *GetCartRequest, opts ...grpc.CallOption) (*Cart, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Cart)
+	err := c.cc.Invoke(ctx, CartService_GetCart_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *cartServiceClient) EmptyCart(ctx context.Context, in *EmptyCartRequest, opts ...grpc.CallOption) (*Empty, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Empty)
+	err := c.cc.Invoke(ctx, CartService_EmptyCart_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// CartServiceServer is the server API for CartService service.
+// All implementations must embed UnimplementedCartServiceServer
+// for forward compatibility.
+type CartServiceServer interface {
+	AddItem(context.Context, *AddItemRequest) (*Empty, error)
+	GetCart(context.Context, *GetCartRequest) (*Cart, error)
+	EmptyCart(context.Context, *EmptyCartRequest) (*Empty, error)
+	mustEmbedUnimplementedCartServiceServer()
+}
+
+// UnimplementedCartServiceServer 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 UnimplementedCartServiceServer struct{}
+
+func (UnimplementedCartServiceServer) AddItem(context.Context, *AddItemRequest) (*Empty, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method AddItem not implemented")
+}
+func (UnimplementedCartServiceServer) GetCart(context.Context, *GetCartRequest) (*Cart, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetCart not implemented")
+}
+func (UnimplementedCartServiceServer) EmptyCart(context.Context, *EmptyCartRequest) (*Empty, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method EmptyCart not implemented")
+}
+func (UnimplementedCartServiceServer) mustEmbedUnimplementedCartServiceServer() {}
+func (UnimplementedCartServiceServer) testEmbeddedByValue()                     {}
+
+// UnsafeCartServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to CartServiceServer will
+// result in compilation errors.
+type UnsafeCartServiceServer interface {
+	mustEmbedUnimplementedCartServiceServer()
+}
+
+func RegisterCartServiceServer(s grpc.ServiceRegistrar, srv CartServiceServer) {
+	// If the following call pancis, it indicates UnimplementedCartServiceServer 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(&CartService_ServiceDesc, srv)
+}
+
+func _CartService_AddItem_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(AddItemRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CartServiceServer).AddItem(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: CartService_AddItem_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CartServiceServer).AddItem(ctx, req.(*AddItemRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _CartService_GetCart_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetCartRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CartServiceServer).GetCart(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: CartService_GetCart_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CartServiceServer).GetCart(ctx, req.(*GetCartRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _CartService_EmptyCart_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(EmptyCartRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CartServiceServer).EmptyCart(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: CartService_EmptyCart_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CartServiceServer).EmptyCart(ctx, req.(*EmptyCartRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// CartService_ServiceDesc is the grpc.ServiceDesc for CartService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var CartService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "oteldemo.CartService",
+	HandlerType: (*CartServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "AddItem",
+			Handler:    _CartService_AddItem_Handler,
+		},
+		{
+			MethodName: "GetCart",
+			Handler:    _CartService_GetCart_Handler,
+		},
+		{
+			MethodName: "EmptyCart",
+			Handler:    _CartService_EmptyCart_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "demo.proto",
+}
+
+const (
+	RecommendationService_ListRecommendations_FullMethodName = "/oteldemo.RecommendationService/ListRecommendations"
+)
+
+// RecommendationServiceClient is the client API for RecommendationService 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 RecommendationServiceClient interface {
+	ListRecommendations(ctx context.Context, in *ListRecommendationsRequest, opts ...grpc.CallOption) (*ListRecommendationsResponse, error)
+}
+
+type recommendationServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewRecommendationServiceClient(cc grpc.ClientConnInterface) RecommendationServiceClient {
+	return &recommendationServiceClient{cc}
+}
+
+func (c *recommendationServiceClient) ListRecommendations(ctx context.Context, in *ListRecommendationsRequest, opts ...grpc.CallOption) (*ListRecommendationsResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(ListRecommendationsResponse)
+	err := c.cc.Invoke(ctx, RecommendationService_ListRecommendations_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// RecommendationServiceServer is the server API for RecommendationService service.
+// All implementations must embed UnimplementedRecommendationServiceServer
+// for forward compatibility.
+type RecommendationServiceServer interface {
+	ListRecommendations(context.Context, *ListRecommendationsRequest) (*ListRecommendationsResponse, error)
+	mustEmbedUnimplementedRecommendationServiceServer()
+}
+
+// UnimplementedRecommendationServiceServer 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 UnimplementedRecommendationServiceServer struct{}
+
+func (UnimplementedRecommendationServiceServer) ListRecommendations(context.Context, *ListRecommendationsRequest) (*ListRecommendationsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListRecommendations not implemented")
+}
+func (UnimplementedRecommendationServiceServer) mustEmbedUnimplementedRecommendationServiceServer() {}
+func (UnimplementedRecommendationServiceServer) testEmbeddedByValue()                               {}
+
+// UnsafeRecommendationServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to RecommendationServiceServer will
+// result in compilation errors.
+type UnsafeRecommendationServiceServer interface {
+	mustEmbedUnimplementedRecommendationServiceServer()
+}
+
+func RegisterRecommendationServiceServer(s grpc.ServiceRegistrar, srv RecommendationServiceServer) {
+	// If the following call pancis, it indicates UnimplementedRecommendationServiceServer 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(&RecommendationService_ServiceDesc, srv)
+}
+
+func _RecommendationService_ListRecommendations_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListRecommendationsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(RecommendationServiceServer).ListRecommendations(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: RecommendationService_ListRecommendations_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(RecommendationServiceServer).ListRecommendations(ctx, req.(*ListRecommendationsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// RecommendationService_ServiceDesc is the grpc.ServiceDesc for RecommendationService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var RecommendationService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "oteldemo.RecommendationService",
+	HandlerType: (*RecommendationServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "ListRecommendations",
+			Handler:    _RecommendationService_ListRecommendations_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "demo.proto",
+}
+
+const (
+	ProductCatalogService_ListProducts_FullMethodName   = "/oteldemo.ProductCatalogService/ListProducts"
+	ProductCatalogService_GetProduct_FullMethodName     = "/oteldemo.ProductCatalogService/GetProduct"
+	ProductCatalogService_SearchProducts_FullMethodName = "/oteldemo.ProductCatalogService/SearchProducts"
+)
+
+// ProductCatalogServiceClient is the client API for ProductCatalogService 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 ProductCatalogServiceClient interface {
+	ListProducts(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*ListProductsResponse, error)
+	GetProduct(ctx context.Context, in *GetProductRequest, opts ...grpc.CallOption) (*Product, error)
+	SearchProducts(ctx context.Context, in *SearchProductsRequest, opts ...grpc.CallOption) (*SearchProductsResponse, error)
+}
+
+type productCatalogServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewProductCatalogServiceClient(cc grpc.ClientConnInterface) ProductCatalogServiceClient {
+	return &productCatalogServiceClient{cc}
+}
+
+func (c *productCatalogServiceClient) ListProducts(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*ListProductsResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(ListProductsResponse)
+	err := c.cc.Invoke(ctx, ProductCatalogService_ListProducts_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *productCatalogServiceClient) GetProduct(ctx context.Context, in *GetProductRequest, opts ...grpc.CallOption) (*Product, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Product)
+	err := c.cc.Invoke(ctx, ProductCatalogService_GetProduct_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *productCatalogServiceClient) SearchProducts(ctx context.Context, in *SearchProductsRequest, opts ...grpc.CallOption) (*SearchProductsResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(SearchProductsResponse)
+	err := c.cc.Invoke(ctx, ProductCatalogService_SearchProducts_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// ProductCatalogServiceServer is the server API for ProductCatalogService service.
+// All implementations must embed UnimplementedProductCatalogServiceServer
+// for forward compatibility.
+type ProductCatalogServiceServer interface {
+	ListProducts(context.Context, *Empty) (*ListProductsResponse, error)
+	GetProduct(context.Context, *GetProductRequest) (*Product, error)
+	SearchProducts(context.Context, *SearchProductsRequest) (*SearchProductsResponse, error)
+	mustEmbedUnimplementedProductCatalogServiceServer()
+}
+
+// UnimplementedProductCatalogServiceServer 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 UnimplementedProductCatalogServiceServer struct{}
+
+func (UnimplementedProductCatalogServiceServer) ListProducts(context.Context, *Empty) (*ListProductsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListProducts not implemented")
+}
+func (UnimplementedProductCatalogServiceServer) GetProduct(context.Context, *GetProductRequest) (*Product, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetProduct not implemented")
+}
+func (UnimplementedProductCatalogServiceServer) SearchProducts(context.Context, *SearchProductsRequest) (*SearchProductsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SearchProducts not implemented")
+}
+func (UnimplementedProductCatalogServiceServer) mustEmbedUnimplementedProductCatalogServiceServer() {}
+func (UnimplementedProductCatalogServiceServer) testEmbeddedByValue()                               {}
+
+// UnsafeProductCatalogServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to ProductCatalogServiceServer will
+// result in compilation errors.
+type UnsafeProductCatalogServiceServer interface {
+	mustEmbedUnimplementedProductCatalogServiceServer()
+}
+
+func RegisterProductCatalogServiceServer(s grpc.ServiceRegistrar, srv ProductCatalogServiceServer) {
+	// If the following call pancis, it indicates UnimplementedProductCatalogServiceServer 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(&ProductCatalogService_ServiceDesc, srv)
+}
+
+func _ProductCatalogService_ListProducts_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ProductCatalogServiceServer).ListProducts(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ProductCatalogService_ListProducts_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ProductCatalogServiceServer).ListProducts(ctx, req.(*Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ProductCatalogService_GetProduct_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetProductRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ProductCatalogServiceServer).GetProduct(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ProductCatalogService_GetProduct_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ProductCatalogServiceServer).GetProduct(ctx, req.(*GetProductRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ProductCatalogService_SearchProducts_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SearchProductsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ProductCatalogServiceServer).SearchProducts(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ProductCatalogService_SearchProducts_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ProductCatalogServiceServer).SearchProducts(ctx, req.(*SearchProductsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// ProductCatalogService_ServiceDesc is the grpc.ServiceDesc for ProductCatalogService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var ProductCatalogService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "oteldemo.ProductCatalogService",
+	HandlerType: (*ProductCatalogServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "ListProducts",
+			Handler:    _ProductCatalogService_ListProducts_Handler,
+		},
+		{
+			MethodName: "GetProduct",
+			Handler:    _ProductCatalogService_GetProduct_Handler,
+		},
+		{
+			MethodName: "SearchProducts",
+			Handler:    _ProductCatalogService_SearchProducts_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "demo.proto",
+}
+
+const (
+	ShippingService_GetQuote_FullMethodName  = "/oteldemo.ShippingService/GetQuote"
+	ShippingService_ShipOrder_FullMethodName = "/oteldemo.ShippingService/ShipOrder"
+)
+
+// ShippingServiceClient is the client API for ShippingService 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 ShippingServiceClient interface {
+	GetQuote(ctx context.Context, in *GetQuoteRequest, opts ...grpc.CallOption) (*GetQuoteResponse, error)
+	ShipOrder(ctx context.Context, in *ShipOrderRequest, opts ...grpc.CallOption) (*ShipOrderResponse, error)
+}
+
+type shippingServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewShippingServiceClient(cc grpc.ClientConnInterface) ShippingServiceClient {
+	return &shippingServiceClient{cc}
+}
+
+func (c *shippingServiceClient) GetQuote(ctx context.Context, in *GetQuoteRequest, opts ...grpc.CallOption) (*GetQuoteResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(GetQuoteResponse)
+	err := c.cc.Invoke(ctx, ShippingService_GetQuote_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *shippingServiceClient) ShipOrder(ctx context.Context, in *ShipOrderRequest, opts ...grpc.CallOption) (*ShipOrderResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(ShipOrderResponse)
+	err := c.cc.Invoke(ctx, ShippingService_ShipOrder_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// ShippingServiceServer is the server API for ShippingService service.
+// All implementations must embed UnimplementedShippingServiceServer
+// for forward compatibility.
+type ShippingServiceServer interface {
+	GetQuote(context.Context, *GetQuoteRequest) (*GetQuoteResponse, error)
+	ShipOrder(context.Context, *ShipOrderRequest) (*ShipOrderResponse, error)
+	mustEmbedUnimplementedShippingServiceServer()
+}
+
+// UnimplementedShippingServiceServer 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 UnimplementedShippingServiceServer struct{}
+
+func (UnimplementedShippingServiceServer) GetQuote(context.Context, *GetQuoteRequest) (*GetQuoteResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetQuote not implemented")
+}
+func (UnimplementedShippingServiceServer) ShipOrder(context.Context, *ShipOrderRequest) (*ShipOrderResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ShipOrder not implemented")
+}
+func (UnimplementedShippingServiceServer) mustEmbedUnimplementedShippingServiceServer() {}
+func (UnimplementedShippingServiceServer) testEmbeddedByValue()                         {}
+
+// UnsafeShippingServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to ShippingServiceServer will
+// result in compilation errors.
+type UnsafeShippingServiceServer interface {
+	mustEmbedUnimplementedShippingServiceServer()
+}
+
+func RegisterShippingServiceServer(s grpc.ServiceRegistrar, srv ShippingServiceServer) {
+	// If the following call pancis, it indicates UnimplementedShippingServiceServer 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(&ShippingService_ServiceDesc, srv)
+}
+
+func _ShippingService_GetQuote_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetQuoteRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ShippingServiceServer).GetQuote(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ShippingService_GetQuote_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ShippingServiceServer).GetQuote(ctx, req.(*GetQuoteRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ShippingService_ShipOrder_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ShipOrderRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ShippingServiceServer).ShipOrder(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ShippingService_ShipOrder_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ShippingServiceServer).ShipOrder(ctx, req.(*ShipOrderRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// ShippingService_ServiceDesc is the grpc.ServiceDesc for ShippingService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var ShippingService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "oteldemo.ShippingService",
+	HandlerType: (*ShippingServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetQuote",
+			Handler:    _ShippingService_GetQuote_Handler,
+		},
+		{
+			MethodName: "ShipOrder",
+			Handler:    _ShippingService_ShipOrder_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "demo.proto",
+}
+
+const (
+	CurrencyService_GetSupportedCurrencies_FullMethodName = "/oteldemo.CurrencyService/GetSupportedCurrencies"
+	CurrencyService_Convert_FullMethodName                = "/oteldemo.CurrencyService/Convert"
+)
+
+// CurrencyServiceClient is the client API for CurrencyService 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 CurrencyServiceClient interface {
+	GetSupportedCurrencies(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*GetSupportedCurrenciesResponse, error)
+	Convert(ctx context.Context, in *CurrencyConversionRequest, opts ...grpc.CallOption) (*Money, error)
+}
+
+type currencyServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewCurrencyServiceClient(cc grpc.ClientConnInterface) CurrencyServiceClient {
+	return &currencyServiceClient{cc}
+}
+
+func (c *currencyServiceClient) GetSupportedCurrencies(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*GetSupportedCurrenciesResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(GetSupportedCurrenciesResponse)
+	err := c.cc.Invoke(ctx, CurrencyService_GetSupportedCurrencies_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *currencyServiceClient) Convert(ctx context.Context, in *CurrencyConversionRequest, opts ...grpc.CallOption) (*Money, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Money)
+	err := c.cc.Invoke(ctx, CurrencyService_Convert_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// CurrencyServiceServer is the server API for CurrencyService service.
+// All implementations must embed UnimplementedCurrencyServiceServer
+// for forward compatibility.
+type CurrencyServiceServer interface {
+	GetSupportedCurrencies(context.Context, *Empty) (*GetSupportedCurrenciesResponse, error)
+	Convert(context.Context, *CurrencyConversionRequest) (*Money, error)
+	mustEmbedUnimplementedCurrencyServiceServer()
+}
+
+// UnimplementedCurrencyServiceServer 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 UnimplementedCurrencyServiceServer struct{}
+
+func (UnimplementedCurrencyServiceServer) GetSupportedCurrencies(context.Context, *Empty) (*GetSupportedCurrenciesResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetSupportedCurrencies not implemented")
+}
+func (UnimplementedCurrencyServiceServer) Convert(context.Context, *CurrencyConversionRequest) (*Money, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Convert not implemented")
+}
+func (UnimplementedCurrencyServiceServer) mustEmbedUnimplementedCurrencyServiceServer() {}
+func (UnimplementedCurrencyServiceServer) testEmbeddedByValue()                         {}
+
+// UnsafeCurrencyServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to CurrencyServiceServer will
+// result in compilation errors.
+type UnsafeCurrencyServiceServer interface {
+	mustEmbedUnimplementedCurrencyServiceServer()
+}
+
+func RegisterCurrencyServiceServer(s grpc.ServiceRegistrar, srv CurrencyServiceServer) {
+	// If the following call pancis, it indicates UnimplementedCurrencyServiceServer 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(&CurrencyService_ServiceDesc, srv)
+}
+
+func _CurrencyService_GetSupportedCurrencies_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CurrencyServiceServer).GetSupportedCurrencies(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: CurrencyService_GetSupportedCurrencies_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CurrencyServiceServer).GetSupportedCurrencies(ctx, req.(*Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _CurrencyService_Convert_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CurrencyConversionRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CurrencyServiceServer).Convert(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: CurrencyService_Convert_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CurrencyServiceServer).Convert(ctx, req.(*CurrencyConversionRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// CurrencyService_ServiceDesc is the grpc.ServiceDesc for CurrencyService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var CurrencyService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "oteldemo.CurrencyService",
+	HandlerType: (*CurrencyServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetSupportedCurrencies",
+			Handler:    _CurrencyService_GetSupportedCurrencies_Handler,
+		},
+		{
+			MethodName: "Convert",
+			Handler:    _CurrencyService_Convert_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "demo.proto",
+}
+
+const (
+	PaymentService_Charge_FullMethodName = "/oteldemo.PaymentService/Charge"
+)
+
+// PaymentServiceClient is the client API for PaymentService 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 PaymentServiceClient interface {
+	Charge(ctx context.Context, in *ChargeRequest, opts ...grpc.CallOption) (*ChargeResponse, error)
+}
+
+type paymentServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewPaymentServiceClient(cc grpc.ClientConnInterface) PaymentServiceClient {
+	return &paymentServiceClient{cc}
+}
+
+func (c *paymentServiceClient) Charge(ctx context.Context, in *ChargeRequest, opts ...grpc.CallOption) (*ChargeResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(ChargeResponse)
+	err := c.cc.Invoke(ctx, PaymentService_Charge_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// PaymentServiceServer is the server API for PaymentService service.
+// All implementations must embed UnimplementedPaymentServiceServer
+// for forward compatibility.
+type PaymentServiceServer interface {
+	Charge(context.Context, *ChargeRequest) (*ChargeResponse, error)
+	mustEmbedUnimplementedPaymentServiceServer()
+}
+
+// UnimplementedPaymentServiceServer 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 UnimplementedPaymentServiceServer struct{}
+
+func (UnimplementedPaymentServiceServer) Charge(context.Context, *ChargeRequest) (*ChargeResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Charge not implemented")
+}
+func (UnimplementedPaymentServiceServer) mustEmbedUnimplementedPaymentServiceServer() {}
+func (UnimplementedPaymentServiceServer) testEmbeddedByValue()                        {}
+
+// UnsafePaymentServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to PaymentServiceServer will
+// result in compilation errors.
+type UnsafePaymentServiceServer interface {
+	mustEmbedUnimplementedPaymentServiceServer()
+}
+
+func RegisterPaymentServiceServer(s grpc.ServiceRegistrar, srv PaymentServiceServer) {
+	// If the following call pancis, it indicates UnimplementedPaymentServiceServer 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(&PaymentService_ServiceDesc, srv)
+}
+
+func _PaymentService_Charge_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ChargeRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(PaymentServiceServer).Charge(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: PaymentService_Charge_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(PaymentServiceServer).Charge(ctx, req.(*ChargeRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// PaymentService_ServiceDesc is the grpc.ServiceDesc for PaymentService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var PaymentService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "oteldemo.PaymentService",
+	HandlerType: (*PaymentServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Charge",
+			Handler:    _PaymentService_Charge_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "demo.proto",
+}
+
+const (
+	EmailService_SendOrderConfirmation_FullMethodName = "/oteldemo.EmailService/SendOrderConfirmation"
+)
+
+// EmailServiceClient is the client API for EmailService 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 EmailServiceClient interface {
+	SendOrderConfirmation(ctx context.Context, in *SendOrderConfirmationRequest, opts ...grpc.CallOption) (*Empty, error)
+}
+
+type emailServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewEmailServiceClient(cc grpc.ClientConnInterface) EmailServiceClient {
+	return &emailServiceClient{cc}
+}
+
+func (c *emailServiceClient) SendOrderConfirmation(ctx context.Context, in *SendOrderConfirmationRequest, opts ...grpc.CallOption) (*Empty, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Empty)
+	err := c.cc.Invoke(ctx, EmailService_SendOrderConfirmation_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// EmailServiceServer is the server API for EmailService service.
+// All implementations must embed UnimplementedEmailServiceServer
+// for forward compatibility.
+type EmailServiceServer interface {
+	SendOrderConfirmation(context.Context, *SendOrderConfirmationRequest) (*Empty, error)
+	mustEmbedUnimplementedEmailServiceServer()
+}
+
+// UnimplementedEmailServiceServer 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 UnimplementedEmailServiceServer struct{}
+
+func (UnimplementedEmailServiceServer) SendOrderConfirmation(context.Context, *SendOrderConfirmationRequest) (*Empty, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SendOrderConfirmation not implemented")
+}
+func (UnimplementedEmailServiceServer) mustEmbedUnimplementedEmailServiceServer() {}
+func (UnimplementedEmailServiceServer) testEmbeddedByValue()                      {}
+
+// UnsafeEmailServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to EmailServiceServer will
+// result in compilation errors.
+type UnsafeEmailServiceServer interface {
+	mustEmbedUnimplementedEmailServiceServer()
+}
+
+func RegisterEmailServiceServer(s grpc.ServiceRegistrar, srv EmailServiceServer) {
+	// If the following call pancis, it indicates UnimplementedEmailServiceServer 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(&EmailService_ServiceDesc, srv)
+}
+
+func _EmailService_SendOrderConfirmation_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SendOrderConfirmationRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(EmailServiceServer).SendOrderConfirmation(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: EmailService_SendOrderConfirmation_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(EmailServiceServer).SendOrderConfirmation(ctx, req.(*SendOrderConfirmationRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// EmailService_ServiceDesc is the grpc.ServiceDesc for EmailService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var EmailService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "oteldemo.EmailService",
+	HandlerType: (*EmailServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "SendOrderConfirmation",
+			Handler:    _EmailService_SendOrderConfirmation_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "demo.proto",
+}
+
+const (
+	CheckoutService_PlaceOrder_FullMethodName = "/oteldemo.CheckoutService/PlaceOrder"
+)
+
+// CheckoutServiceClient is the client API for CheckoutService 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 CheckoutServiceClient interface {
+	PlaceOrder(ctx context.Context, in *PlaceOrderRequest, opts ...grpc.CallOption) (*PlaceOrderResponse, error)
+}
+
+type checkoutServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewCheckoutServiceClient(cc grpc.ClientConnInterface) CheckoutServiceClient {
+	return &checkoutServiceClient{cc}
+}
+
+func (c *checkoutServiceClient) PlaceOrder(ctx context.Context, in *PlaceOrderRequest, opts ...grpc.CallOption) (*PlaceOrderResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(PlaceOrderResponse)
+	err := c.cc.Invoke(ctx, CheckoutService_PlaceOrder_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// CheckoutServiceServer is the server API for CheckoutService service.
+// All implementations must embed UnimplementedCheckoutServiceServer
+// for forward compatibility.
+type CheckoutServiceServer interface {
+	PlaceOrder(context.Context, *PlaceOrderRequest) (*PlaceOrderResponse, error)
+	mustEmbedUnimplementedCheckoutServiceServer()
+}
+
+// UnimplementedCheckoutServiceServer 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 UnimplementedCheckoutServiceServer struct{}
+
+func (UnimplementedCheckoutServiceServer) PlaceOrder(context.Context, *PlaceOrderRequest) (*PlaceOrderResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method PlaceOrder not implemented")
+}
+func (UnimplementedCheckoutServiceServer) mustEmbedUnimplementedCheckoutServiceServer() {}
+func (UnimplementedCheckoutServiceServer) testEmbeddedByValue()                         {}
+
+// UnsafeCheckoutServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to CheckoutServiceServer will
+// result in compilation errors.
+type UnsafeCheckoutServiceServer interface {
+	mustEmbedUnimplementedCheckoutServiceServer()
+}
+
+func RegisterCheckoutServiceServer(s grpc.ServiceRegistrar, srv CheckoutServiceServer) {
+	// If the following call pancis, it indicates UnimplementedCheckoutServiceServer 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(&CheckoutService_ServiceDesc, srv)
+}
+
+func _CheckoutService_PlaceOrder_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(PlaceOrderRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CheckoutServiceServer).PlaceOrder(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: CheckoutService_PlaceOrder_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CheckoutServiceServer).PlaceOrder(ctx, req.(*PlaceOrderRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// CheckoutService_ServiceDesc is the grpc.ServiceDesc for CheckoutService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var CheckoutService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "oteldemo.CheckoutService",
+	HandlerType: (*CheckoutServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "PlaceOrder",
+			Handler:    _CheckoutService_PlaceOrder_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "demo.proto",
+}
+
+const (
+	AdService_GetAds_FullMethodName = "/oteldemo.AdService/GetAds"
+)
+
+// AdServiceClient is the client API for AdService 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 AdServiceClient interface {
+	GetAds(ctx context.Context, in *AdRequest, opts ...grpc.CallOption) (*AdResponse, error)
+}
+
+type adServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewAdServiceClient(cc grpc.ClientConnInterface) AdServiceClient {
+	return &adServiceClient{cc}
+}
+
+func (c *adServiceClient) GetAds(ctx context.Context, in *AdRequest, opts ...grpc.CallOption) (*AdResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(AdResponse)
+	err := c.cc.Invoke(ctx, AdService_GetAds_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// AdServiceServer is the server API for AdService service.
+// All implementations must embed UnimplementedAdServiceServer
+// for forward compatibility.
+type AdServiceServer interface {
+	GetAds(context.Context, *AdRequest) (*AdResponse, error)
+	mustEmbedUnimplementedAdServiceServer()
+}
+
+// UnimplementedAdServiceServer 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 UnimplementedAdServiceServer struct{}
+
+func (UnimplementedAdServiceServer) GetAds(context.Context, *AdRequest) (*AdResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetAds not implemented")
+}
+func (UnimplementedAdServiceServer) mustEmbedUnimplementedAdServiceServer() {}
+func (UnimplementedAdServiceServer) testEmbeddedByValue()                   {}
+
+// UnsafeAdServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to AdServiceServer will
+// result in compilation errors.
+type UnsafeAdServiceServer interface {
+	mustEmbedUnimplementedAdServiceServer()
+}
+
+func RegisterAdServiceServer(s grpc.ServiceRegistrar, srv AdServiceServer) {
+	// If the following call pancis, it indicates UnimplementedAdServiceServer 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(&AdService_ServiceDesc, srv)
+}
+
+func _AdService_GetAds_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(AdRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(AdServiceServer).GetAds(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: AdService_GetAds_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(AdServiceServer).GetAds(ctx, req.(*AdRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// AdService_ServiceDesc is the grpc.ServiceDesc for AdService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var AdService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "oteldemo.AdService",
+	HandlerType: (*AdServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetAds",
+			Handler:    _AdService_GetAds_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "demo.proto",
+}
+
+const (
+	FeatureFlagService_GetFlag_FullMethodName    = "/oteldemo.FeatureFlagService/GetFlag"
+	FeatureFlagService_CreateFlag_FullMethodName = "/oteldemo.FeatureFlagService/CreateFlag"
+	FeatureFlagService_UpdateFlag_FullMethodName = "/oteldemo.FeatureFlagService/UpdateFlag"
+	FeatureFlagService_ListFlags_FullMethodName  = "/oteldemo.FeatureFlagService/ListFlags"
+	FeatureFlagService_DeleteFlag_FullMethodName = "/oteldemo.FeatureFlagService/DeleteFlag"
+)
+
+// FeatureFlagServiceClient is the client API for FeatureFlagService 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 FeatureFlagServiceClient interface {
+	GetFlag(ctx context.Context, in *GetFlagRequest, opts ...grpc.CallOption) (*GetFlagResponse, error)
+	CreateFlag(ctx context.Context, in *CreateFlagRequest, opts ...grpc.CallOption) (*CreateFlagResponse, error)
+	UpdateFlag(ctx context.Context, in *UpdateFlagRequest, opts ...grpc.CallOption) (*UpdateFlagResponse, error)
+	ListFlags(ctx context.Context, in *ListFlagsRequest, opts ...grpc.CallOption) (*ListFlagsResponse, error)
+	DeleteFlag(ctx context.Context, in *DeleteFlagRequest, opts ...grpc.CallOption) (*DeleteFlagResponse, error)
+}
+
+type featureFlagServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewFeatureFlagServiceClient(cc grpc.ClientConnInterface) FeatureFlagServiceClient {
+	return &featureFlagServiceClient{cc}
+}
+
+func (c *featureFlagServiceClient) GetFlag(ctx context.Context, in *GetFlagRequest, opts ...grpc.CallOption) (*GetFlagResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(GetFlagResponse)
+	err := c.cc.Invoke(ctx, FeatureFlagService_GetFlag_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *featureFlagServiceClient) CreateFlag(ctx context.Context, in *CreateFlagRequest, opts ...grpc.CallOption) (*CreateFlagResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(CreateFlagResponse)
+	err := c.cc.Invoke(ctx, FeatureFlagService_CreateFlag_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *featureFlagServiceClient) UpdateFlag(ctx context.Context, in *UpdateFlagRequest, opts ...grpc.CallOption) (*UpdateFlagResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(UpdateFlagResponse)
+	err := c.cc.Invoke(ctx, FeatureFlagService_UpdateFlag_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *featureFlagServiceClient) ListFlags(ctx context.Context, in *ListFlagsRequest, opts ...grpc.CallOption) (*ListFlagsResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(ListFlagsResponse)
+	err := c.cc.Invoke(ctx, FeatureFlagService_ListFlags_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *featureFlagServiceClient) DeleteFlag(ctx context.Context, in *DeleteFlagRequest, opts ...grpc.CallOption) (*DeleteFlagResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(DeleteFlagResponse)
+	err := c.cc.Invoke(ctx, FeatureFlagService_DeleteFlag_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// FeatureFlagServiceServer is the server API for FeatureFlagService service.
+// All implementations must embed UnimplementedFeatureFlagServiceServer
+// for forward compatibility.
+type FeatureFlagServiceServer interface {
+	GetFlag(context.Context, *GetFlagRequest) (*GetFlagResponse, error)
+	CreateFlag(context.Context, *CreateFlagRequest) (*CreateFlagResponse, error)
+	UpdateFlag(context.Context, *UpdateFlagRequest) (*UpdateFlagResponse, error)
+	ListFlags(context.Context, *ListFlagsRequest) (*ListFlagsResponse, error)
+	DeleteFlag(context.Context, *DeleteFlagRequest) (*DeleteFlagResponse, error)
+	mustEmbedUnimplementedFeatureFlagServiceServer()
+}
+
+// UnimplementedFeatureFlagServiceServer 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 UnimplementedFeatureFlagServiceServer struct{}
+
+func (UnimplementedFeatureFlagServiceServer) GetFlag(context.Context, *GetFlagRequest) (*GetFlagResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetFlag not implemented")
+}
+func (UnimplementedFeatureFlagServiceServer) CreateFlag(context.Context, *CreateFlagRequest) (*CreateFlagResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CreateFlag not implemented")
+}
+func (UnimplementedFeatureFlagServiceServer) UpdateFlag(context.Context, *UpdateFlagRequest) (*UpdateFlagResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method UpdateFlag not implemented")
+}
+func (UnimplementedFeatureFlagServiceServer) ListFlags(context.Context, *ListFlagsRequest) (*ListFlagsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListFlags not implemented")
+}
+func (UnimplementedFeatureFlagServiceServer) DeleteFlag(context.Context, *DeleteFlagRequest) (*DeleteFlagResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method DeleteFlag not implemented")
+}
+func (UnimplementedFeatureFlagServiceServer) mustEmbedUnimplementedFeatureFlagServiceServer() {}
+func (UnimplementedFeatureFlagServiceServer) testEmbeddedByValue()                            {}
+
+// UnsafeFeatureFlagServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to FeatureFlagServiceServer will
+// result in compilation errors.
+type UnsafeFeatureFlagServiceServer interface {
+	mustEmbedUnimplementedFeatureFlagServiceServer()
+}
+
+func RegisterFeatureFlagServiceServer(s grpc.ServiceRegistrar, srv FeatureFlagServiceServer) {
+	// If the following call pancis, it indicates UnimplementedFeatureFlagServiceServer 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(&FeatureFlagService_ServiceDesc, srv)
+}
+
+func _FeatureFlagService_GetFlag_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetFlagRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(FeatureFlagServiceServer).GetFlag(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: FeatureFlagService_GetFlag_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(FeatureFlagServiceServer).GetFlag(ctx, req.(*GetFlagRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _FeatureFlagService_CreateFlag_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CreateFlagRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(FeatureFlagServiceServer).CreateFlag(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: FeatureFlagService_CreateFlag_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(FeatureFlagServiceServer).CreateFlag(ctx, req.(*CreateFlagRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _FeatureFlagService_UpdateFlag_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(UpdateFlagRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(FeatureFlagServiceServer).UpdateFlag(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: FeatureFlagService_UpdateFlag_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(FeatureFlagServiceServer).UpdateFlag(ctx, req.(*UpdateFlagRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _FeatureFlagService_ListFlags_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListFlagsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(FeatureFlagServiceServer).ListFlags(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: FeatureFlagService_ListFlags_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(FeatureFlagServiceServer).ListFlags(ctx, req.(*ListFlagsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _FeatureFlagService_DeleteFlag_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DeleteFlagRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(FeatureFlagServiceServer).DeleteFlag(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: FeatureFlagService_DeleteFlag_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(FeatureFlagServiceServer).DeleteFlag(ctx, req.(*DeleteFlagRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// FeatureFlagService_ServiceDesc is the grpc.ServiceDesc for FeatureFlagService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var FeatureFlagService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "oteldemo.FeatureFlagService",
+	HandlerType: (*FeatureFlagServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetFlag",
+			Handler:    _FeatureFlagService_GetFlag_Handler,
+		},
+		{
+			MethodName: "CreateFlag",
+			Handler:    _FeatureFlagService_CreateFlag_Handler,
+		},
+		{
+			MethodName: "UpdateFlag",
+			Handler:    _FeatureFlagService_UpdateFlag_Handler,
+		},
+		{
+			MethodName: "ListFlags",
+			Handler:    _FeatureFlagService_ListFlags_Handler,
+		},
+		{
+			MethodName: "DeleteFlag",
+			Handler:    _FeatureFlagService_DeleteFlag_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "demo.proto",
+}